Method for synthesizing composite molecular sieve by microwave method and catalytic performance application thereof

A technology of composite molecular sieves and synthesis methods, which is applied in the field of microwave synthesis of composite molecular sieves and their catalytic properties, can solve the problems of few reports and achieve the effects of no temperature gradient and thermal stress, time saving, and good catalytic effect
CN102000604AInactive Publication Date: 2011-04-06JIANGSU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU UNIV
Publication Date
2011-04-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for synthesizing a composite molecular sieve by a microwave method and catalytic performance application thereof. In the method for preparing the composite molecular sieve by the microwave method, kaolin is taken as a raw material, inorganic silicate is taken as an additional silicon source, and the prepared composite molecular sieve is applied to the alkylation reaction of phenol and tertiary butanol. The method comprises the following steps of: adding a certain amount of sodium silicate into the kaolin serving as the raw material to synthesize a Y type molecular sieve precursor; and preparing a composite molecular sieve Y / MCM-41 by the microwave method by using hexadecyl trimethyl ammonium bromide serving as a template. The synthesized molecular sieve has two pore structures, namely micropores and mesopores; the specific surface area of a sample is more than 550 m<2> / g; the average pore size is roughly 2.7 nm; and the sample has a regular and ordered hexagonal pore structure. The synthesized molecular sieve has good catalytic effect on the alkylation reaction of the phenol and the tertiary butanol, and particularly the selectivity of 4-tertiary butyl phenol is up to 86.3 percent.
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Description

technical field

[0001] The invention relates to a method for synthesizing composite molecular sieves by microwave method using cheap kaolin as raw materials, in particular referring to using kaolin and inorganic silicate as raw materials and hexadecyltrimethylammonium bromide as template agent to synthesize composite molecular sieves by microwave method , and it was applied to catalyze the alkylation reaction of phenol with tert-butanol. Background technique

[0002] Composite molecular sieve is a new type of molecular sieve developed on the basis of mesoporous molecular sieve. It has two kinds of pore distributions: mesopore and micropore. Stability makes the advantages of the two materials complement each other, thereby overcoming the shortcomings of mesoporous molecular sieves or microporous molecular sieves used alone in industrial applications. Composite molecular sieves have high acidic and hydrothermal stability, which make them have broad application prospects in pe...

Claims

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