Silicon-aluminum molecular sieve, preparation method and applications thereof, and cyclic ketone conversion method

Abstract

The invention provides a silicon-aluminum molecular sieve, a preparation method and applications thereof. The silicon-aluminum molecular sieve comprises an aluminum element, a silicon element, and an oxygen element. The pore volume of the silicon-aluminum molecular sieve is 0.3 cm3 / g or more. The total specific surface area is 200 m2 / g or more, the external surface area is 30 m2 / g or more, and the external surface area accounts for 10 to 55% of the total specific surface area. The benzene absorption amount is at least 65 mg for each gram of molecular sieve under following conditions: temperature: 25 DEG C, P / P0=0.10, and absorption time: 1 hour. Under N2 static absorption tests, the micro pore size distribution is in a range of 0.9 to 2.0 nm. The invention provides a cyclic ketone conversion method. The provided molecular sieve containing precious metals has a special physico-chemical structure, the benzene absorption amount is high, and the micro pore size distribution is in a range of 0.9 to 2.0 nm. The molecular sieve can achieve a better catalytic effect, when being applied to reactions that generate circular molecules (especially cyclic ketone molecules) or reactions that circular molecules (especially cyclic ketone molecules) participate in.

Description

technical field [0001] The invention relates to a silica-alumina molecular sieve and a preparation method of the silica-alumina molecular sieve, and also relates to the application of the silica-alumina molecular sieve and a method for converting cyclic ketones. Background technique [0002] Titanium-silicon molecular sieve is a molecular sieve whose skeleton is composed of silicon, titanium and oxygen elements. It has broad application prospects in petroleum refining and petrochemical industry. Among them, TS-1 molecular sieve is a new type of titanium-silicon molecular sieve with excellent catalytic selective oxidation performance formed by introducing transition metal element titanium into the molecular sieve framework with ZSM-5 structure. [0003] TS-1 not only has the catalytic oxidation of titanium, but also has the shape-selective effect and excellent stability of ZSM-5 molecular sieve, and has successfully realized industrial application in the process of preparing ...

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Problems solved by technology

In this way, valuable land resources and storage space are taken up, and the recovery and utilization technology development of deactivated ammoximation catalysts is urgently needed

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