Selective Crystallization of Aluminophosphate Molecular Sieves with an AEL Structure


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Abstract

The effect of the temperature and exposure time of the starting aluminophosphate gels on their chemical and phase composition was studied. When the source of aluminum is its hydrated oxide (boehmite), gels with different contents of ammonium phosphate, undissolved boehmite, and amorphous aluminophosphate can be formed. The formation of a gel with dominant amorphous aluminophosphate allows selective crystallization of AlPO4-11 of high phase purity and ~100% crystallinity. The developed procedure for the preparation of highly dispersed aluminophosphate AlPO4-11 molecular sieves with these properties allows a transition to crystallization of silicoaluminophosphates SAPO-11—promising domestic catalysts for industrial hydroisomerization of n-paraffins in the production of Arctic diesel fuels and group III oils and isomerization of butenes.

About the authors

M. R. Agliullin

Institute of Petroleum Chemistry and Catalysis, Ufa Federal Research Center, Russian Academy of Sciences; Ufa State Petroleum Technological University

Author for correspondence.
Email: maratradikovich@mail.ru
Russian Federation, Ufa, 450075; Ufa, 450062

Z. R. Khairullina

Ufa State Petroleum Technological University

Email: maratradikovich@mail.ru
Russian Federation, Ufa, 450062

A. V. Faizullin

Institute of Petroleum Chemistry and Catalysis, Ufa Federal Research Center, Russian Academy of Sciences

Email: maratradikovich@mail.ru
Russian Federation, Ufa, 450075

A. I. Petrov

Ufa State Petroleum Technological University

Email: maratradikovich@mail.ru
Russian Federation, Ufa, 450062

A. A. Badretdinova

Ufa State Petroleum Technological University

Email: maratradikovich@mail.ru
Russian Federation, Ufa, 450062

V. P. Talzi

Institute of Processing of Hydrocarbons, Siberian Branch, Russian Academy of Sciences

Email: maratradikovich@mail.ru
Russian Federation, Omsk, 644040

B. I. Kutepov

Institute of Petroleum Chemistry and Catalysis, Ufa Federal Research Center, Russian Academy of Sciences; Ufa State Petroleum Technological University

Email: maratradikovich@mail.ru
Russian Federation, Ufa, 450075; Ufa, 450062

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