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A kind of catalytic membrane reaction preparation technology of diphenyl carbonate

A technology for the preparation of diphenyl carbonate and its preparation technology, which is applied in the field of catalytic membrane reaction preparation technology of diphenyl carbonate, can solve the problems of limited application and low thermal stability, and achieve improved selectivity, improved conversion rate, and enhanced hydrothermal The effect of stability

Inactive Publication Date: 2017-04-19
TAIYUAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the (hydro) thermal stability of mesoporous molecular sieves is lower than that of microporous zeolites, which greatly limits their applications.

Method used

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  • A kind of catalytic membrane reaction preparation technology of diphenyl carbonate
  • A kind of catalytic membrane reaction preparation technology of diphenyl carbonate
  • A kind of catalytic membrane reaction preparation technology of diphenyl carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0023]Preparation of EMT seed crystals: Weigh 21.99 g of sodium silicate nonahydrate, 10.00 g of aluminum sulfate octadecahydrate, 19.17 g of sodium hydroxide and 70.01 g of deionized water. Dissolve aluminum sulfate octadecahydrate, sodium hydroxide, and deionized water in a 100 mL small beaker, mix the cooled sodium hydroxide solution with the aluminum sulfate solution, transfer to a 250 mL three-necked flask after the reaction is complete, and stir. Sodium silicate nonahydrate and deionized water were heated and stirred in a water bath at 50 °C until completely dissolved in a 100 mL small beaker. After cooling, the sodium silicate solution was slowly dropped into the three-necked flask and mixed with the aluminum source. After adding the sodium silicate solution, stir vigorously at 700 r / min for 10 min. Then the mixture was stirred at 650 r / min for 1 h until the mixture was homogeneous. Stop stirring, put into a stainless steel reactor, at 23 ° C, after aging for 14 h, cr...

Embodiment example 2

[0029] The crystallization temperature of Ti-HMS-1 / Y molecular sieve membrane synthesis was 140°C, and the crystallization time was 36 h. Other steps are the same as Embodiment 1.

Embodiment example 3

[0031] The amount of tetrapropylammonium hydroxide (10.676%) used in the synthesis of Ti-HMS-1 / Y molecular sieve membrane was 10.4 g, and the amount of deionized water was 15.3 g. Other steps are the same as Embodiment 1.

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Abstract

The invention provides a catalytic membrane reaction preparation technology for diphenyl carbonate. The catalytic membrane reaction preparation technology is characterized in that a porous mass serves as a carrier, a microporous molecular sieve membrane-Y-type molecular sieve membrane is grown at first, and a microporous structural unit TS-1 is led into an HMS mesoporous molecular sieve to construct a microporous-mesoporous composite molecular sieve Ti-HMS-1 / Y membrane. The molecular sieve membrane is used for dimethyl carbonate and phenolic ester exchange reaction to prepare diphenyl carbonate, the Ti-HMS-1 molecular sieve membrane layer plays a catalytic role, and the Y-type molecular sieve membrane layer plays a separating role, so that catalytic reaction and product separation are simultaneously carried out in the reaction process. Owing to the separation function of the catalytic membrane, products are unceasingly moved out of a reaction system, thermodynamic equilibrium limitation is broken, and the conversion rate of dimethyl carbonate and the yield of targeted products are increased.

Description

technical field [0001] The invention relates to a catalytic membrane reaction preparation process of diphenyl carbonate, in particular to a preparation process of diphenyl carbonate using a microporous-mesoporous composite molecular sieve membrane Ti-HMS-1 / Y as a catalytic separation membrane. Background technique [0002] Diphenyl carbonate (DPC) is a kind of organic substance with low toxicity and no pollution. As an important chemical intermediate, it can be used to synthesize many organic compounds and polymer materials, such as monoisocyanate, diisocyanate, polycarbonate, poly p-carbonyl benzoate, polyaryl carbonate, etc., in the synthesis of pesticides, It is also widely used in fields such as medicine. Therefore, the research and development of DPC has become the focus of attention. [0003] There are three main methods for synthesizing DPC: phosgene method, transesterification method and oxidative carbonylation method. Phosgene is highly toxic and corrosive, and i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/89C07C68/06C07C68/08C07C69/96
Inventor 王晓东黄伟董梅陈小方张勇跃秦张峰
Owner TAIYUAN UNIV OF TECH