HYDROGENATION OF POLY-a-OLEFINS ON SUPPORTED PALLADIUM CATALYSTS
Abstract
In the present work, before metal loading, the raw diatomite was modified by thermal treatment and acid activation with hydrochloric solution, to obtain the catalyst support suitable for use in hydrogenation of vegetable oils. Changes in surface structure and morphology of diatomite samples has been characterized by scanning electron microscopy, X-ray fluorescence, and nitrogen adsorption (BET). 1.0% Pd/D-HCI-500 catalysts with 1.0wt.% Pd content supported on activated diatomite were prepared by an adsorption method, average size of palladium particles were determined by high resolution transmission electron microscopy. The activities o f the catalyst was tested for poly-a-olefins hydrogenation reaction in a batch reactor (Parr-4848) operated under 1.0 MPa pressure and at reaction temperature 900C.
About the Authors
K. ToshtayKazakhstan
S. K. Toktasynov
Kazakhstan
E. A. Aubakirov
Kazakhstan
R. S. Bashirbaeva
Kazakhstan
References
1. Цветков О. Н. Каталитические процессы в технологии полиальафаолефиновых масел // Катализ в промышленности. - 2002. -№ 6. - С.33-40.
2. Цветков О. Н. Поли-а-олефиновые масла: химия, технология и применение. - М.: Техника, 2006.
3. Yadav G. D., Doshi N. S. Development of a green process for poly-a-olefin based lubricants // Green Chemistry. - 2002. - Т. 4. - №. 6. - С. 528-540.
4. Hope K. D., Driver M. S., Harris T. V. High viscosity polyalphaolefins prepared with ionic liquid catalyst : Patent. 6395948 USA. - 2002.
5. Zander L. et al. Processes for producing poly-alpha-olefins, and poly-alpha-olefins produced thereby : Patent. 7351871 USA. - 2008.
6. Wu M. M. et al. Process to produce low viscosity poly-alpha-olefins: Patent. 8207390 USA. - 2012.
7. Кудайберген Б., Ауезов А. Б., Тоштай К., Ералиева А. Т., Бижанов Ж. А., Токтасынов С. К. Очистка рапсового масла модифицированным диатомитом // Известия Национальной академии наук Республики Казахстан. Серия химии и технологии. - 2015. - № 1. - Б. 39-46.
8. Toshtay K., Auyezov A. B., Bizhanov Zh. A., Yeraliyeva A. T., Toktasinov S. K., Kudaibergen B., Nurakyshev A. Effect of Catalyst Preparation on the Selective Hydrogenation of Vegetable oil over low Percentage Pd/Diatomite Catalysts // Eurasian chemico-technological journal. - 2015. - № 1 (17).- P. 33-39.
9. Sing K. S. W., Everett D. H., Haul R. A. W., Moscow L., Pierotti R. A., Siemieniewska T., Rouquerol J. Reporting physisorption date for gas/solid system with special reference to the determination of surface area and porosity // Journal of pure and applied chemistry. - 1985. - Vol.57. - P. 603-619.
10. Achyut K. P., Mishra B. G., Mishra D. K., Singh R. K. Effect of sulphuric acid treatment on the physico-chemical characteristics of kaolin clay // Colloids and surfaces A: Physicochemical and engineering aspects. - 2010. - Vol. 363. - №. 1-3. - P. 98-104.
11. Mahani H., Kazemeini M. Treatment of diatomaceous earth to obtain its catalyst support // Scientia Iranica.- 2003. - Vol. 10. - P. 350-356.
12. Belver C., Munoz M. A. B., Vicente M. A. Chemical activation of a kaolinite under acid and alkaline condition // Chemistry of materials. - 2002. -Vol. 14. - № 5. - P. 2033-2043.
13. El-Gamal I. M., Gobiel S. Synthesis and evaluation of poly-a-olefins for improving the flow properties of gas oil // Journal of applied polymer science. - 1996. - Vol. 61. - №. 8. - P. 1265-1272
Review
For citations:
Toshtay K., Toktasynov S.K., Aubakirov E.A., Bashirbaeva R.S. HYDROGENATION OF POLY-a-OLEFINS ON SUPPORTED PALLADIUM CATALYSTS. Herald of the Kazakh-British technical university. 2019;16(2):60-66. (In Russ.)