Modified IM-5 molecular sieves, preparation method therefor, application of modified IM-5 molecular sieves and alkylation reaction method for toluene and methanol

A molecular sieve and IM-5 technology, applied in molecular sieve catalysts, chemical instruments and methods, organic chemistry, etc., can solve problems such as poor stability, low toluene conversion rate, and decreased toluene conversion rate, and achieve long service life and high catalytic activity Effect
CN107552086AActive Publication Date: 2018-01-09CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2018-01-09

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Abstract

The invention relates to the field of preparation of molecular sieves and particularly relates to modified IM-5 molecular sieves, a preparation method therefor, an application of the modified IM-5 molecular sieves and an alkylation reaction method for toluene and methanol. The preparation method for the modified IM-5 molecular sieves comprises the steps of subjecting a modifier solution to contactwith H-IM-5 molecular sieves, and then, roasting a solid material obtained through contact, wherein the modifier solution contains quaternary ammonium cations, quaternary phosphonium cations and at least one lanthanide metal compound and is alkaline, and the contact temperature is 70 DEG C to 200 DEG C. According to the modified IM-5 molecular sieves provided by the invention, on the basis of overall weight of the modified IM-5 molecular sieves, by oxides, the phosphorus content is 0.1wt% to 15wt%, and the content of lanthanide metal element is 0.1wt% to 20wt%. By applying the modified IM-5 molecular sieves provided by the invention to an alkylation reaction for the toluene and the methanol, the modified IM-5 molecular sieves have the advantages that the deactivation rate is low, the catalytic activity is high, and the selectivity of dimethylbenzene and trimethylbenzene is good.
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Description

technical field

[0001] The invention relates to the field of molecular sieve preparation, in particular to a modified IM-5 molecular sieve, a method for preparing a modified IM-5 molecular sieve, a modified IM-5 molecular sieve obtained by the preparation method, and a modified IM-5 molecular sieve in The application in the alkylation reaction of toluene and methanol and a method for the alkylation reaction of toluene and methanol. Background technique

[0002] IM-5 molecular sieves were first synthesized by Suk Bong Hong et al. (USP6136290) using pyrrolidine bisquaternary ammonium salt templates. Pore, its pore structure is similar to ZSM-5 molecular sieve, and the molecular sieve also has a 12-membered ring cage structure, which is different from ZSM-5. That The amount of acid and Lewis acid is close to that of TUN structure molecular sieve, The ratio of acid to Lewis acid (B / L) is close to that of ZSM-5 molecular sieve.

[0003] IM-5 molecular sieves have shown good...

Claims

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