Catalytic synthesis of higher α-olefins by paraffin cracking

Konuspayev, S. R.; Kadirbekov, K. A.; Sarsekova, A. T.; Nurbayeva, D. R.; Zhambakin, Dauren

doi:10.1134/s0965544110050087

Cited by 6 publications

(5 citation statements)

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“…Indeed, all of the above factors have contributed to an increase in the catalytic activity of the cracking of paraffins [13,14]. In addition, an analysis of published data shows that ammonium salts of phosphorousmolibdenum heteropolyacid under certain conditions, can be used for the extraction of liquid radioactive waste of the lanthanides (Ce) and actinides (Am , Np) [16][17][18][19] .…”

Section: Resultsmentioning

confidence: 99%

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Acid Activation of Natural Zeolite with High Content of Iron Oxides in Creation of Selective Sorbents and Catalysts

et al. 2017

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Abstract. The paper studies the influence of the nature of modifying acids (mineral, organic and heteropolyacids), and their combination on the composition and structure of the iron oxide rich clinoptilolit from Shankanay field in Kazakhstan for creation of selective catalysts in hydracarbon processing and sorbents for extracting ions of lanthanide and actinide elements. It is shown that sequential processing of natural zeolite in optimal conditions, by hydrochloric and sulfosalicylic acids lead to intensive decationization and dealumination, as well as maximum removal of iron ions from the zeolite framework without destroying it. It is found that the combination of activated clinoptilolite with hydrochloric acid and phosphotungstic heteropolyacid contributes to obtain catalyst system with high surface area and acidity.

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Section: Resultsmentioning

confidence: 99%

“…In the last 10 years, authors are performing intensive research on the construction of catalytic systems and the creation of sorbents for the extraction of metals by modifying the natural zeolite Shankanay field (Kazakhstan) [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Acid Activation of Natural Zeolite with High Content of Iron Oxides in Creation of Selective Sorbents and Catalysts

et al. 2017

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“…Основными качествами его являются повышенная адсорбционная емкость, механическая прочность и термическая устойчивость. В литературе известны работы [1][2][3] по получению из них катализаторов крекинга парафинов. Авторы [4][5][6] использовали природный цеолит, состоящий из клиноптилолита в качестве носителей для катализаторов различных процессов, так в [4] на нем получали необходимые наноструктуры, в [5] получали катализаторы для низкотемпературного окисления SO 2 в SO 3 при синтезе серной кислоты, в работе [6] на базе природного клиноптилолита получали сорбенты для магниевых и кальциевых солей.…”

Section: Introductionunclassified

“…Авторы [1][2][3] природный цеолит Шанканайского месторождения модифицировали водными растворами соляной кислоты для удаления ионов щелочных и щелочноземельных металлов. При этом был установлен порог концентрации кислоты, выше которой идет разрушение кристаллического каркаса цеолита и превращение его в аморфный алюмосиликат.…”

Section: Introductionunclassified

Cracking of the paraffins on catalysts from natural zeolite of Kazakhstan Shankanay field

Krebayeva¹,

Algabas²,

Еssenbayeva³

et al. 2021

KazNU Chem Bull

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Cracking of paraffins was held to obtain long chain α-olefins using the catalysts from natural zeolite of Shankanay field modified with 1N HCl at the temperature range of 500-570°С and atmospheric pressure on a fixed layer. Liquid and gaseous reaction products were analyzed by gas chromatography; regeneration of the catalyst was carried out with a steam-air mixture until total absence of CO2 in the contact gases. To evaluate the structure and texture of the obtained catalysts, the methods of Mössbauer spectroscopy, X-Ray diffractometry analysis, and elemental analysis using scanning electron microscopy were used. As results, zeolite modification allowed doubling the activity of the catalysts and increasing the selectivity by 23.8-44.8%. The group compositions of olefins, alkanes and gaseous products were detected. Iron form under α-Fe2O3, ε-FeOOH and γ-FeOOH was present. The modified and blank form of catalysts under 1N hydrochloric acid solution washing phase content was detected; partial destruction of the crystalline carcass of clinoptilolite was observed.

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“…They have fair to good performance in properties such as high viscosity index, low pour point, low evaporation loss and high flash point (Kioupis and Maginn, 1999; Liu et al , 2006). The main feed of PAO is C 8 -C 12 (especially C 10 ) alphaolefin, and there are many processes to produce alphaolefin, such as ethylene oligomerization process (Keim, 1990; Espinoza et al , 1987), wax cracking process (Wakui et al , 2009; Konuspayev et al , 2010; Choi et al , 2011), Fischer–Tropsch synthesis process (Alperowicz, 1996; Anon, 1997), etc.…”

Section: Introductionmentioning

confidence: 99%

Preparation and performance evaluation of mPAO8 using olefin from coal as raw material

Zeng

et al. 2017

ILT

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Purpose The purpose of this paper is to prepare metallocene polyalphaolefin 8 (mPAO8) by the oligomerization of olefin from coal with metallocene catalyst system and compare it with commercially available polyalphaolefin 8 (PAO8) from Chevron. Design/methodology/approach Molecular structures, component and mass were determined by nuclear magnetic resonance spectroscopy, gas chromatography and gel permeation chromatography, respectively. The physico-chemical properties, including Noack volatility, viscosity index and elemental analyses, were studied. The oxidative stability was evaluated by pressurized differential scanning calorimetry, whereas the thermal stability was studied by thermo-gravimetric analysis. Findings The produced mPAO8 consisted of a large part of tetramer, pentamer and a small part of trimer and hexamer. Additive T501 significantly improved the oxidation stability of PAO8 from Chevron and the synthesized mPAO8. Both samples had similar properties, such as oxidative stability, additive response, pour point and Noack volatility loss. But mPAO8 possessed a higher thermal stability, better viscosity index and flash point than PAO8. Therefore, the mPAO8 prepared by the oligomerization of olefin from coal could be used as base oil for lubricant development. Originality/value The mPAO8 base oil was successfully prepared by successive carbon numbers and shows similar properties with commercially available PAO8 products from Chevron. The findings can cover the shortage of the synthesis lubricants market in China.

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Catalytic synthesis of higher α-olefins by paraffin cracking

Cited by 6 publications

References 1 publication

Acid Activation of Natural Zeolite with High Content of Iron Oxides in Creation of Selective Sorbents and Catalysts

Acid Activation of Natural Zeolite with High Content of Iron Oxides in Creation of Selective Sorbents and Catalysts

Cracking of the paraffins on catalysts from natural zeolite of Kazakhstan Shankanay field

Preparation and performance evaluation of mPAO8 using olefin from coal as raw material

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