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A kind of method that phenol and dimethyl ester carry out transesterification

A technology of dimethyl ester and transesterification, which is applied in chemical instruments and methods, preparation of organic carbonates, preparation by reaction between ester groups and hydroxyl groups, etc., to achieve the effects of mild reaction conditions, easy control and simple production process

Active Publication Date: 2015-08-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are problems such as separation, purification and recycling in this method

Method used

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  • A kind of method that phenol and dimethyl ester carry out transesterification
  • A kind of method that phenol and dimethyl ester carry out transesterification

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Phenol, dimethyl carbonate, solvent and catalyst (TS-1 and phosphotungstic heteropolyacid H 3 PW 12 o 40 The mass ratio is 100:1) According to the mass ratio of solvent methanol to catalyst is 120:1, the mass ratio of phenol and dimethyl carbonate to catalyst is 20:20:1, and the temperature is 150°C and the pressure is 1.5MPa. reaction.

[0048] The results of the reaction for 2 hours were as follows: the conversion rate of dimethyl carbonate was 56%; the selectivity of methyl phenyl carbonate was 79%.

Embodiment 2

[0050] Phenol, dimethyl carbonate, solvent and catalyst (TS-1 and molybdenum tungsten heteropoly blue H 5 MoW 12 o 40 The mass ratio is 10:1) According to the mass ratio of solvent methanol and catalyst is 100:1, the mass ratio of phenol and dimethyl carbonate to catalyst is 40:20:1, at a temperature of 150°C and a pressure of 1.0MPa react.

[0051] The results of the reaction for 2 hours were as follows: the conversion rate of dimethyl carbonate was 83%; the selectivity of methyl phenyl carbonate was 84%.

Embodiment 3

[0053] Phenol, dimethyl carbonate, solvent and catalyst (TS-1 and homovanadic acid H 4 V 2 o 7 The mass ratio is 50:1) According to the mass ratio of solvent acetone and catalyst is 500:1, the mass ratio of phenol and dimethyl carbonate to catalyst is 80:20:9, at a temperature of 160°C and a pressure of 0.1MPa react.

[0054] The results of the reaction for 2 hours were as follows: the conversion rate of dimethyl carbonate was 89%; the selectivity of methyl phenyl carbonate was 86%.

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Abstract

The invention discloses a method for subjecting phenol and dimethyl ester to transesterification. The method comprises the step of mixing and contacting phenol, dimethyl ester and a catalyst under the condition of transesterification. The method is characterized in that the catalyst contains multi-metal oxyacid and / or multi-metal oxysalt and titanium silicalite molecular sieves. The method is environment-friendly, is simple in production process and low in requirement for raw material purity, and is beneficial to industrial production and application.

Description

technical field [0001] The invention relates to a method for transesterification of phenol and dimethyl ester. Background technique [0002] Diphenyl Carbonate (Diphenyl Carbonate, DPC for short) has low toxicity and no pollution. It is an important organic carbonate and an important environmental protection chemical product. It is mainly used in the plastics industry to manufacture polycarbonate and methyl p-hydroxybenzoate. Esters, monoisocyanates, diisocyanates can also be used to prepare plastic plasticizers, and can also be used as solvents and heat carriers. In recent years, due to its good mechanical, optical and electronic properties, polycarbonate has been widely used in various industries such as electronics, machinery, aviation, transportation, optical machinery, construction, agriculture, textiles, and medical treatment. Manufacture electronic and electrical insulation components, gears and other mechanical parts, tempered glass, optical mechanical parts, medica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C67/03C07C68/06C07C69/36C07C69/96B01J29/89
Inventor 史春风林民朱斌
Owner CHINA PETROLEUM & CHEM CORP