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The Influence of Temperature of Gel Ageing on Synthesis and Properties of the Silicoaluminophosphate Molecular Sieve SAPO-11
https://doi.org/10.18412/1816-0387-2019-6-414-420
Abstract
The influence of temperature of ageing of the initial silicoaluminophosphate gel on crystallization of the molecular sieve SAPO-11 was studied. It was established that with pseudoboehmite used as the source of aluminum, a gel containing di-n-propylamine phosphate, non-dissolved pseudoboehmite and amorphous silicoaluminophosphate was formed. Elevation of the gel ageing temperature from 25 to 90 °C was shown to result in an increase in the proportion of the amorphous phase in the gel. Crystallization of the silicoalumophosphate gel at 90 °C allowed SAPO-11 to be crystallized at high phase purity and close to 98 % crystallinity. A high activity and selectivity (86 %) of SAPO-11 to linear dimmers was observed during dimerization of α-methylstirene.
About the Authors
M. R. Agliullin
Institute of Petrochemistry and Catalysis, Ufa
Russian Federation
Russian Federation
Z. R. Khairullina
Institute of Petrochemistry and Catalysis, Ufa
Russian Federation
Russian Federation
R. Z. Kuvatova
Ufa State Petroleum Technological University
Russian Federation
Russian Federation
B. I. Kutepov
Institute of Petrochemistry and Catalysis, Ufa
Russian Federation
Russian Federation
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Review
For citations:
Agliullin M.R., Khairullina Z.R., Kuvatova R.Z., Kutepov B.I. The Influence of Temperature of Gel Ageing on Synthesis and Properties of the Silicoaluminophosphate Molecular Sieve SAPO-11. Kataliz v promyshlennosti. 2019;19(6):414-420. (In Russ.) https://doi.org/10.18412/1816-0387-2019-6-414-420
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