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Ester exchange catalysis method

A catalyst and dimethyl ester technology are applied in the field of catalyzing the transesterification of phenol and dimethyl ester to produce diphenyl ester, which can solve the problems of complex production process, harmful emissions, etc. The effect of high ester yield

Active Publication Date: 2013-07-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Compared with the traditional method, the method provided by the present invention overcomes the problems of complex traditional production process, equipment corrosion, and harmful emissions, and adopts heteroatom molecular sieve modified by soluble zinc salt as the active component, without adding any inhibitor to the raw material or initiator, for green synthesis process

Method used

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Experimental program
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Effect test

Embodiment 1

[0033] Phenol, dimethyl carbonate, solvent and catalyst (the mol ratio of zinc nitrate and titanium silicon molecular sieve 0.2: 1) is 200: 1 according to solvent methanol and catalyst mass ratio, and the mass ratio of phenol and dimethyl carbonate and catalyst is 20 : 20: 1, the reaction was carried out at a temperature of 200° C. and a pressure of 1.5 MPa. The results of the reaction for 2 hours were as follows: the conversion rate of dimethyl carbonate was 47%; the selectivity of methyl phenyl carbonate was 78%.

Embodiment 2

[0035] With phenol, dimethyl carbonate, solvent and catalyzer (the mol ratio 1: 1 of zinc phosphate and titanium silicon molecular sieve) is 100: 1 according to the mass ratio of solvent methanol and catalyzer, the mass ratio of phenol and dimethyl carbonate and catalyzer is 40:20:1, the reaction was carried out at a temperature of 150°C and a pressure of 1.0 MPa. The results of the reaction for 2 hours were as follows: the conversion rate of dimethyl carbonate was 38%; the selectivity of methyl phenyl carbonate was 86%.

Embodiment 3

[0037]With phenol, dimethyl carbonate, solvent and catalyzer (the mol ratio 0.1: 1 of zinc sulfate and titanium silicon molecular sieve) is 500: 1 according to the mass ratio of solvent acetone and catalyzer, the mass ratio of phenol and dimethyl carbonate and catalyzer is 80:20:9, the reaction was carried out at a temperature of 160°C and a pressure of 0.1 MPa. The results of the reaction for 2 hours were as follows: the conversion rate of dimethyl carbonate was 53%; the selectivity of methyl phenyl carbonate was 81%.

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Abstract

The invention discloses an ester exchange catalysis method. Specifically, phenol, dimethyl ester, a solvent and a catalyst are mixed and subjected to a contact reaction. The method is characterized in that the catalyst is a soluble zinc salt modified heteroatom molecular sieve.

Description

technical field [0001] The present invention relates to a method for catalyzing transesterification, and more particularly relates to a method for catalyzing transesterification of phenol and dimethyl ester to produce diphenyl ester. Background technique [0002] Diphenyl Carbonate (Diphenyl Carbonae, DPC for short) is an important organic carbonate with low toxicity and no pollution. DPC is an important environmentally friendly chemical product, mainly used in the plastics industry to manufacture polycarbonate and methyl p-hydroxybenzoate, monoisocyanate, diisocyanate can also be used to prepare plastic plasticizers, and can also be used as solvents and heat carriers. Especially in recent years, because polycarbonate has good mechanical, optical and electronic properties, it has been widely used in various industries such as electronic appliances, machinery, aviation, transportation, optical machinery, construction, agriculture, textiles, and medical treatment, such as Use...

Claims

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Application Information

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IPC IPC(8): C07C69/96C07C68/06B01J29/89
Inventor 林民史春风朱斌汝迎春
Owner CHINA PETROLEUM & CHEM CORP
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