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Page 14, Results: 236
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131.
Подробнее
35
J21
Jalmakhanbetova, R.I.
Calculate the standard enthalpies of combustion , formation and melting of the complex roseofungin with a-, B- and y- cyclodextrin. [Текст] / R.I. Jalmakhanbetova, Ye. M. Suleimen, B. K. Kasenov // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 44-47
ББК 35
Рубрики: chemical Technology
Кл.слова (ненормированные):
roseofungin -- cyclodextrin -- standard enthalpy of combustion -- standard enthalpy of formation -- enthalpy of melting of a complex
Аннотация: One of the most important quantities in chemical thermodynamics and thermochemistry is the enthalpy of combustion. Of the currently existing methods for calculating the heat of combustion of natural and synthetic organic compounds, the most acceptable and correct in our case was the Karash method. In this study, the standard enthalpy of combustion, the standard enthalpy of formation, and the melting enthalpy of the antibiotic roseofungin and its cyclodextrin derivatives were calculated. As a result of the study, the thermodynamic constants of the standard enthalpies of combustion, standard enthalpies of formation, and the enthalpies of melting of the above compounds were calculated, which are of interest for physicochemical modeling of processes with their participation, serve as initial information arrays for loading into fundamental thermodynamic data banks and reference books, and is also important for standardization and certification of these complexes. It should be noted that the presence of a large number of hydroxyl groups in the structures of the studied complexes allows them to be attributed to polar compounds.
Держатели документа:
WKU
Доп.точки доступа:
Suleimen, Ye.M.
Kasenov, B.K.
J21
Jalmakhanbetova, R.I.
Calculate the standard enthalpies of combustion , formation and melting of the complex roseofungin with a-, B- and y- cyclodextrin. [Текст] / R.I. Jalmakhanbetova, Ye. M. Suleimen, B. K. Kasenov // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 44-47
Рубрики: chemical Technology
Кл.слова (ненормированные):
roseofungin -- cyclodextrin -- standard enthalpy of combustion -- standard enthalpy of formation -- enthalpy of melting of a complex
Аннотация: One of the most important quantities in chemical thermodynamics and thermochemistry is the enthalpy of combustion. Of the currently existing methods for calculating the heat of combustion of natural and synthetic organic compounds, the most acceptable and correct in our case was the Karash method. In this study, the standard enthalpy of combustion, the standard enthalpy of formation, and the melting enthalpy of the antibiotic roseofungin and its cyclodextrin derivatives were calculated. As a result of the study, the thermodynamic constants of the standard enthalpies of combustion, standard enthalpies of formation, and the enthalpies of melting of the above compounds were calculated, which are of interest for physicochemical modeling of processes with their participation, serve as initial information arrays for loading into fundamental thermodynamic data banks and reference books, and is also important for standardization and certification of these complexes. It should be noted that the presence of a large number of hydroxyl groups in the structures of the studied complexes allows them to be attributed to polar compounds.
Держатели документа:
WKU
Доп.точки доступа:
Suleimen, Ye.M.
Kasenov, B.K.
132.
Подробнее
35
R18
Rakhimberlinova, Zh. B.
Chemical activation of the surface of the burnt rock by various modifiers. [Текст] / Zh. B. Rakhimberlinova, I. V. Kulakov, A.Zh. Alimzhanova, M. М. Mussirepov, N. E. Nakypbekova // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 81-86
ББК 35
Рубрики: chemical Technology
Кл.слова (ненормированные):
oxidized coals -- humic acids -- inorganic surfaces -- burnt rock -- host rock -- modifiers
Аннотация: This article presents the results of experimental studies of the process of grafting humic acids and their functional derivatives on modified and unmodified surfaces of burnt rock. It is shown that the inoculation of humic acids on inorganic carriers is more successful with the preliminary activation of the surface of burnt rocks.
Держатели документа:
WKU
Доп.точки доступа:
Kulakov, I.V.
Alimzhanova, A.Zh.
Mussirepov, M.М.
Nakypbekova, N.E.
R18
Rakhimberlinova, Zh. B.
Chemical activation of the surface of the burnt rock by various modifiers. [Текст] / Zh. B. Rakhimberlinova, I. V. Kulakov, A.Zh. Alimzhanova, M. М. Mussirepov, N. E. Nakypbekova // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 81-86
Рубрики: chemical Technology
Кл.слова (ненормированные):
oxidized coals -- humic acids -- inorganic surfaces -- burnt rock -- host rock -- modifiers
Аннотация: This article presents the results of experimental studies of the process of grafting humic acids and their functional derivatives on modified and unmodified surfaces of burnt rock. It is shown that the inoculation of humic acids on inorganic carriers is more successful with the preliminary activation of the surface of burnt rocks.
Держатели документа:
WKU
Доп.точки доступа:
Kulakov, I.V.
Alimzhanova, A.Zh.
Mussirepov, M.М.
Nakypbekova, N.E.
133.
Подробнее
35
R24
Rasulov, S. R.
Development of effective catalysts for processing C3-C4 Hydrocarbons. [Текст] / S. R. Rasulov, G. R. Mustafayeva // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 87-93
ББК 35
Рубрики: chemical Technology
Кл.слова (ненормированные):
refinery gases -- 3-C4 hydrocarbons -- zeolite-containing catalyst -- modifiers -- reaction-regeneration cycles.
Аннотация: The aim of the article is to study the effect of preparation and activation methods of a modified zeolite-containing catalyst on the activity and stability of catalytic properties displayed by it during the conversion of C3-C4 hydrocarbons. During the experiment, the industrial cracking catalyst OMNIKAT, which is a zeolite in the sodium form, was used as the initial one. Zinc, gallium, and REE (rare earth elements) were sequentially applied to decationized samples of this catalyst by ion exchange, impregnation, and dry mechanical mixing, and the effect of these methods on the catalytic properties of the zeolite-containing catalyst was observed. As a result of a comparative analysis of the regularities of aromatization of C3-C4hydrocarbons, it was found that the mechanical mixing method is the most preferable, since it provides the best process performance.
Держатели документа:
WKU
Доп.точки доступа:
Mustafayeva, G.R.
R24
Rasulov, S. R.
Development of effective catalysts for processing C3-C4 Hydrocarbons. [Текст] / S. R. Rasulov, G. R. Mustafayeva // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 87-93
Рубрики: chemical Technology
Кл.слова (ненормированные):
refinery gases -- 3-C4 hydrocarbons -- zeolite-containing catalyst -- modifiers -- reaction-regeneration cycles.
Аннотация: The aim of the article is to study the effect of preparation and activation methods of a modified zeolite-containing catalyst on the activity and stability of catalytic properties displayed by it during the conversion of C3-C4 hydrocarbons. During the experiment, the industrial cracking catalyst OMNIKAT, which is a zeolite in the sodium form, was used as the initial one. Zinc, gallium, and REE (rare earth elements) were sequentially applied to decationized samples of this catalyst by ion exchange, impregnation, and dry mechanical mixing, and the effect of these methods on the catalytic properties of the zeolite-containing catalyst was observed. As a result of a comparative analysis of the regularities of aromatization of C3-C4hydrocarbons, it was found that the mechanical mixing method is the most preferable, since it provides the best process performance.
Держатели документа:
WKU
Доп.точки доступа:
Mustafayeva, G.R.
134.
Подробнее
35
T99
Tyan, A.
Selection of the washing mode in the preparation of beer wort by using the wheat malt. [Текст] / A. Tyan, M. M. Bayazitova // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 94-98
ББК 35
Рубрики: chemical Technology
Кл.слова (ненормированные):
barley -- wheat -- malt -- beer -- fermentation industry -- beer wort concentrate -- extractivity -- color -- mashing -- hydromodule
Аннотация: It should be noted that unmalted wheat is rarely used in brewing. This is because that the use of this cereal as unmalted material leads to significant deviations in the technological process, in particular, the filtration of wort and beer slows down, reduces the colloidal stability of the final product. At the same time, as a raw material for malt, wheat has some advantages over barley. The article deals with the effect of different amounts of wheat malt on the mashing process, the percentage of mashing and mashing modes of barley and wheat malt are selected experimentally.
Держатели документа:
WKU
Доп.точки доступа:
Bayazitova, M.M.
T99
Tyan, A.
Selection of the washing mode in the preparation of beer wort by using the wheat malt. [Текст] / A. Tyan, M. M. Bayazitova // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 94-98
Рубрики: chemical Technology
Кл.слова (ненормированные):
barley -- wheat -- malt -- beer -- fermentation industry -- beer wort concentrate -- extractivity -- color -- mashing -- hydromodule
Аннотация: It should be noted that unmalted wheat is rarely used in brewing. This is because that the use of this cereal as unmalted material leads to significant deviations in the technological process, in particular, the filtration of wort and beer slows down, reduces the colloidal stability of the final product. At the same time, as a raw material for malt, wheat has some advantages over barley. The article deals with the effect of different amounts of wheat malt on the mashing process, the percentage of mashing and mashing modes of barley and wheat malt are selected experimentally.
Держатели документа:
WKU
Доп.точки доступа:
Bayazitova, M.M.
135.
Подробнее
35
V99
Vysotskaya, N. A.
Some features of electrodeposition of metals from electrolytes with surfactants. [Текст] / N. A. Vysotskaya, B.N. Kabylbekova, D. D. Asylbekova, R. S. Spabekova, E. G. Lukin // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 99-103
ББК 35
Рубрики: chemical Technology
Кл.слова (ненормированные):
anticorrosive properties -- electroplating -- surfactants -- thiourea derivatives
Аннотация: For a long time, the use of various surfactants in the composition of simple electrolytes by researchers to improve the quality of metal coatings with cadmium and zinc has been an urgent task.Surfactants contribute to the grinding of the coating structure, the elimination of their porosity and the appearance of anti-corrosion properties of coatings. For example, cadmium electroplated coatings require corrosion resistance, since they are operated in tropical climates, in underground tunnels. Zinc coatings are widely used in building structures and roofing, on electrified railways and high-voltage power lines, in the mining industry and water pipes, as well as for galvanizing the body material in modern all-terrain vehicles to pass in hard-to-reach places without being subjected to corrosion.The object of our research is the process of electrodeposition of cadmium and zinc from simple acidic electrolytes with surfactants, which are thiourea derivatives of dialkyl-phosphorous acids in the current density range of 0.5-3.5 A /dm2, at room temperature. To confirm the quality of the obtained electroplating, we used a JSM-6490LV scanning electron microscope with INSA Energu energy–dispersion microanalysis and HKL-Basicc structural analysis systems with a useful magnification of 300000.
Держатели документа:
WKU
Доп.точки доступа:
Kabylbekova, B.N.
Asylbekova, D.D.
Spabekova, R.S.
Lukin, E.G.
V99
Vysotskaya, N. A.
Some features of electrodeposition of metals from electrolytes with surfactants. [Текст] / N. A. Vysotskaya, B.N. Kabylbekova, D. D. Asylbekova, R. S. Spabekova, E. G. Lukin // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 99-103
Рубрики: chemical Technology
Кл.слова (ненормированные):
anticorrosive properties -- electroplating -- surfactants -- thiourea derivatives
Аннотация: For a long time, the use of various surfactants in the composition of simple electrolytes by researchers to improve the quality of metal coatings with cadmium and zinc has been an urgent task.Surfactants contribute to the grinding of the coating structure, the elimination of their porosity and the appearance of anti-corrosion properties of coatings. For example, cadmium electroplated coatings require corrosion resistance, since they are operated in tropical climates, in underground tunnels. Zinc coatings are widely used in building structures and roofing, on electrified railways and high-voltage power lines, in the mining industry and water pipes, as well as for galvanizing the body material in modern all-terrain vehicles to pass in hard-to-reach places without being subjected to corrosion.The object of our research is the process of electrodeposition of cadmium and zinc from simple acidic electrolytes with surfactants, which are thiourea derivatives of dialkyl-phosphorous acids in the current density range of 0.5-3.5 A /dm2, at room temperature. To confirm the quality of the obtained electroplating, we used a JSM-6490LV scanning electron microscope with INSA Energu energy–dispersion microanalysis and HKL-Basicc structural analysis systems with a useful magnification of 300000.
Держатели документа:
WKU
Доп.точки доступа:
Kabylbekova, B.N.
Asylbekova, D.D.
Spabekova, R.S.
Lukin, E.G.
136.
Подробнее
35
Y45
Yermagambet, B. T.
Synthesis of carbon nanofibers based on humic acid and polyacryonitrile by electrospinning method. [Текст] / B. T. Yermagambet // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 103-110
ББК 35
Рубрики: chemical Technology
Кл.слова (ненормированные):
carbon nanofiber (CNF) -- humic acid (HA) -- polyacrylonitrile (PAN) -- electrospinning -- oxidation -- formation -- carbonization
Аннотация: The article describes a method for obtaining carbon nanofibers (CNFs) based on humic acid from oxidized coal of the Maikuben basin and polycarlonitrile (PAN) by electrospinning in laboratory conditions.
Держатели документа:
WKU
Доп.точки доступа:
Kazankapova, M.K.
Nauryzbayeva, A.T.
Kassenova, Zh.M.
Y45
Yermagambet, B. T.
Synthesis of carbon nanofibers based on humic acid and polyacryonitrile by electrospinning method. [Текст] / B. T. Yermagambet // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 103-110
Рубрики: chemical Technology
Кл.слова (ненормированные):
carbon nanofiber (CNF) -- humic acid (HA) -- polyacrylonitrile (PAN) -- electrospinning -- oxidation -- formation -- carbonization
Аннотация: The article describes a method for obtaining carbon nanofibers (CNFs) based on humic acid from oxidized coal of the Maikuben basin and polycarlonitrile (PAN) by electrospinning in laboratory conditions.
Держатели документа:
WKU
Доп.точки доступа:
Kazankapova, M.K.
Nauryzbayeva, A.T.
Kassenova, Zh.M.
137.
Подробнее
35
A29
Akurpekova, A. K.
Cracking of vacuum gas oil on hlay -containing catalysts with a multicomponent matrix based on montmorilionite. [Текст] / A. K. Akurpekova // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №4. - P. 6-13
ББК 35
Рубрики: chemical Technology
Кл.слова (ненормированные):
catalytic cracking -- montmorillonite -- binder -- strength -- gasoline -- zeolite -- acidity -- acuum gas oil
Аннотация: it is shown that additions of montmorillonite in the Na form contribute to a significant increase in the crushing strength of granules of cracking catalysts while maintaining their activity in the yield of gasoline. Comparison of the results of the cracking of vacuum gas oil on catalysts of the same composition, but with and without a NaMM binder, showed that the introduction of NaMM does not significantly affect the gasoline yield. Samples of catalysts of the same composition, but with the use of Al-pillared MM in Na-and CaNa-exchangeable forms and with the addition of NaMM as a binder, showed similar activity in the yield of gasoline, which is explained by the similarity of the elemental compositions, textural and acidic properties of the studied catalysts. The maximum yield of gasoline, equal to 44.8% and light gas oil of 14.6%, was obtained for Al (2.5) CaNaHMM + NaMM with the addition of a binder and crushing strength of 60-70 N / cm2.
Держатели документа:
WKU
Доп.точки доступа:
Zakarina, N.A.
Kornaukhova, N.A.
Dalelkhanuly, O.
Zhumadullaev, D.A.
A29
Akurpekova, A. K.
Cracking of vacuum gas oil on hlay -containing catalysts with a multicomponent matrix based on montmorilionite. [Текст] / A. K. Akurpekova // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №4. - P. 6-13
Рубрики: chemical Technology
Кл.слова (ненормированные):
catalytic cracking -- montmorillonite -- binder -- strength -- gasoline -- zeolite -- acidity -- acuum gas oil
Аннотация: it is shown that additions of montmorillonite in the Na form contribute to a significant increase in the crushing strength of granules of cracking catalysts while maintaining their activity in the yield of gasoline. Comparison of the results of the cracking of vacuum gas oil on catalysts of the same composition, but with and without a NaMM binder, showed that the introduction of NaMM does not significantly affect the gasoline yield. Samples of catalysts of the same composition, but with the use of Al-pillared MM in Na-and CaNa-exchangeable forms and with the addition of NaMM as a binder, showed similar activity in the yield of gasoline, which is explained by the similarity of the elemental compositions, textural and acidic properties of the studied catalysts. The maximum yield of gasoline, equal to 44.8% and light gas oil of 14.6%, was obtained for Al (2.5) CaNaHMM + NaMM with the addition of a binder and crushing strength of 60-70 N / cm2.
Держатели документа:
WKU
Доп.точки доступа:
Zakarina, N.A.
Kornaukhova, N.A.
Dalelkhanuly, O.
Zhumadullaev, D.A.
138.
Подробнее
35
A36
Aliyeva, N. T.
Lubricating compositions for marine , locomotive and stationary diesels based on high -alkaline detergent-dispersant additives. [Текст] / N. T. Aliyeva, A. A. Javadova, K. Q. Efendiyeva, A. K. Mammadova, Z. K. Maharramova // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №4. - P. 14-18
ББК 35
Рубрики: chemical Technology
Кл.слова (ненормированные):
base oil -- engine oil -- diesel engines -- marine diesels -- locomotive diesel -- stationary diesel -- ubricating composition -- alkaline number -- acid number -- alkylphenol -- ondensation
Аннотация: the article describes new modifications of alkylphenolate type additives synthesized in the ANAS ICA , new lubricating compositions of motor oils M-14 Г2and М-14Г2ЦС (ГОСТ 12337) were created using additives AKİ-150 and AKİ-115B, which are calcium salts of condensation products of methylene bisalkylphenol with formaldehyde, aminoacetic acid and monoethanolamine containingboron and nitrogen with high and medium acid number.
Держатели документа:
WKU
Доп.точки доступа:
Javadova, A.A.
Efendiyeva, K.Q.
Mammadova, A.K.
Maharramova, Z.K.
A36
Aliyeva, N. T.
Lubricating compositions for marine , locomotive and stationary diesels based on high -alkaline detergent-dispersant additives. [Текст] / N. T. Aliyeva, A. A. Javadova, K. Q. Efendiyeva, A. K. Mammadova, Z. K. Maharramova // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №4. - P. 14-18
Рубрики: chemical Technology
Кл.слова (ненормированные):
base oil -- engine oil -- diesel engines -- marine diesels -- locomotive diesel -- stationary diesel -- ubricating composition -- alkaline number -- acid number -- alkylphenol -- ondensation
Аннотация: the article describes new modifications of alkylphenolate type additives synthesized in the ANAS ICA , new lubricating compositions of motor oils M-14 Г2and М-14Г2ЦС (ГОСТ 12337) were created using additives AKİ-150 and AKİ-115B, which are calcium salts of condensation products of methylene bisalkylphenol with formaldehyde, aminoacetic acid and monoethanolamine containingboron and nitrogen with high and medium acid number.
Держатели документа:
WKU
Доп.точки доступа:
Javadova, A.A.
Efendiyeva, K.Q.
Mammadova, A.K.
Maharramova, Z.K.
139.
Подробнее
35
M23
Mammedov, K.
Application of new corrosion inhibitor foroilfield equipment and pipelines for improving the ecological security. [Текст] / K. Mammedov // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №4. - P. 32-39
ББК 35
Рубрики: chemical Technology
Кл.слова (ненормированные):
environment -- complex reagent -- pipeline -- aggressive environment -- corrosion -- cavitation -- viscosity -- paraffin deposition
Аннотация: n addition, to increase the viscosity reduction efficiency of the obtained reagent, the mechanism of complex application of the cavitation process and the reagent was described based on the positive results of the experiments. Also, the results of tests via "cold finger" method showed that new reagent has 53% efficiency in paraffin deposition inhibiting at its optimal anti-corrosion concentration (500 mg /l).As a result of the conducted field tests, it was revealed that theuse of the new multifunctional reagent ensures the continuous operation of pipeline network and reliable environmental protection.
Держатели документа:
WKU
Доп.точки доступа:
Aliyev , S.
Nurullayev, V.
M23
Mammedov, K.
Application of new corrosion inhibitor foroilfield equipment and pipelines for improving the ecological security. [Текст] / K. Mammedov // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №4. - P. 32-39
Рубрики: chemical Technology
Кл.слова (ненормированные):
environment -- complex reagent -- pipeline -- aggressive environment -- corrosion -- cavitation -- viscosity -- paraffin deposition
Аннотация: n addition, to increase the viscosity reduction efficiency of the obtained reagent, the mechanism of complex application of the cavitation process and the reagent was described based on the positive results of the experiments. Also, the results of tests via "cold finger" method showed that new reagent has 53% efficiency in paraffin deposition inhibiting at its optimal anti-corrosion concentration (500 mg /l).As a result of the conducted field tests, it was revealed that theuse of the new multifunctional reagent ensures the continuous operation of pipeline network and reliable environmental protection.
Держатели документа:
WKU
Доп.точки доступа:
Aliyev , S.
Nurullayev, V.
140.
Подробнее
35
M97
Musina, G. N.
Processing of coal tar into petrochemicals and fuel products. [Текст] / G. N. Musina // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №4. - P. 40-47
ББК 35
Рубрики: chemical Technology
Кл.слова (ненормированные):
coal -- hydrogenation -- peat -- cavitation -- petrochemicals -- fuels -- resin -- phenol
Аннотация: the article summarizes the results of the research. The influence of cavitation-wave action on coal tar, which leads to a change in the rheological properties (density, viscosity), as a result of an increase in the yield of light and medium fractions, is investigated, and the process of catalytic hydrogenation of coal in the presence of a catalytic additive and mine methane is studied.
Держатели документа:
WKU
Доп.точки доступа:
Takibayeva, A.T.
Kulakov, I.V.
Zhorabek, A.A.
Shakhmetova, G.A.
M97
Musina, G. N.
Processing of coal tar into petrochemicals and fuel products. [Текст] / G. N. Musina // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №4. - P. 40-47
Рубрики: chemical Technology
Кл.слова (ненормированные):
coal -- hydrogenation -- peat -- cavitation -- petrochemicals -- fuels -- resin -- phenol
Аннотация: the article summarizes the results of the research. The influence of cavitation-wave action on coal tar, which leads to a change in the rheological properties (density, viscosity), as a result of an increase in the yield of light and medium fractions, is investigated, and the process of catalytic hydrogenation of coal in the presence of a catalytic additive and mine methane is studied.
Держатели документа:
WKU
Доп.точки доступа:
Takibayeva, A.T.
Kulakov, I.V.
Zhorabek, A.A.
Shakhmetova, G.A.
Page 14, Results: 236