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Load type heteropoly compound catalyzer for interesterification synthesis reacting

A technology of heteropoly compound and synthesis reaction, applied in physical/chemical process catalyst, catalyst carrier, chemical/physical process and other directions, can solve the problems of difficult separation and recovery of catalyst, low yield of transesterification synthesis reaction, etc., and achieve easy separation and recovery. , does not corrode equipment, and prepares simple effects

Inactive Publication Date: 2008-03-12
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to overcome problems such as low yield of transesterification synthesis reaction in the prior art, difficulty in catalyst separation and recovery, etc., and provide a new loaded heteropoly compound catalyst for transesterification synthesis reaction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Add 3 grams of SiO to a three-necked flask equipped with an air guide tube, a thermometer and a rectification column 2 Supported phosphomolybdovanadate (H 4 PMo 11 VO 40 / SiO 2 ) catalyst (loading is 10%).

[0023] 2. Under nitrogen protection, add 15 grams of phenol.

[0024] 3. When heating to 178°C, start to add dimethyl carbonate (abbreviation: DMC), and the total amount of DMC added is 13.5ml. Start timing from adding DMC, react for 8 hours, constantly steam the mixed fraction of methyl alcohol and dimethyl carbonate by the rectifying column in the reaction process.

[0025]4. Analyze the mixed fraction and the reaction solution containing the main product methyl phenyl carbonate and diphenyl carbonate with Shimadzu GC-14B gas chromatograph, quantify with the calibration normalization method, record: the transformation rate of phenol is 19.3% , the yields of methylphenyl carbonate and diphenyl carbonate were 12.3% and 6.7%, respectively.

Embodiment 2- Embodiment 10

[0027] Reaction condition and analysis test method are the same as embodiment 1, and reaction result is shown in table 1.

[0028] The catalytic activity of table 1 embodiment 2-embodiment 10 catalyst

[0029]

[0030] * MPC: methylphenyl carbonate; DPC: diphenyl carbonate.

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PUM

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Abstract

The present invention relates to a supported heteropoly compound catalyst used for an ester exchange synthesis reaction and is in particular applicable for a reaction to synthesize alkyl aryl carbonate (for example, methyl phenyl carbonate) and diaryl carbonate (for example, diphenyl carbonate) through the ester exchange of dialkyl carbonates (for example, dimethyl carbonate) and aromatic phenolic compound (for example, phenol). The catalyst uses a supported heteropoly compound as an active component, and a mulit-pore material as a carrier to make the total yield ratio reach 46 percent, and the selectivity reach 99 percent. Moreover, the catalyst is provided with the advantage that the catalyst is environment-friendly, causes no corrosion to the equipment, and can be separated easily, the preparation is simple, and so on.

Description

technical field [0001] The invention relates to a supported catalyst, in particular to a supported heteropoly compound catalyst. Background technique [0002] Diaryl carbonate (especially diphenyl carbonate) is an important organic synthesis intermediate, not only used in the synthesis of medicines, pesticides and other products, but also an important intermediate for the preparation of polycarbonate, which has high industrial value. The synthesis methods of diaryl carbonate mainly include phosgene method, transesterification method and oxidative carbonylation method of phenolic compounds. [0003] Because phosgene is highly toxic, the phosgene method will cause serious environmental pollution and is being phased out. Although the oxidative carbonylation method of phenolic compounds has simple and easy-to-obtain raw materials and high atom utilization rate, the catalyst used is expensive and the catalytic efficiency is not high, which limits the use of this method. The tra...

Claims

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Application Information

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IPC IPC(8): B01J27/199B01J32/00C07C69/96C07C68/06
Inventor 陈彤韩华俊王公应陈志明石大川肖福魁张德胜王越曾毅
Owner PETROCHINA CO LTD
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