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Bimetallic composite oxide catalyst and preparation and application methods thereof

A technology of composite oxides and catalysts, applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of poor stability, high yield and selectivity of MPC In order to achieve the effects of good stability, low cost and good catalytic activity

Active Publication Date: 2019-03-08
HENAN INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalysts currently used for transesterification of DMC and DPC cannot make MPC have high yield and selectivity, and the stability of repeated use is poor. Therefore, the development of new catalysts is still the focus of research.

Method used

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  • Bimetallic composite oxide catalyst and preparation and application methods thereof
  • Bimetallic composite oxide catalyst and preparation and application methods thereof
  • Bimetallic composite oxide catalyst and preparation and application methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 18.4g of magnesium nitrate, 1.3g of lead nitrate and 24.0g of CTAB into 80mL of deionized water, heat to 80°C to dissolve the solid completely; under stirring, slowly add ammonium hydroxide dropwise until the pH of the solution reaches 10.0, and the prepared The white suspension was aged at 50°C for 4h, transferred to a polytetrafluoroethylene hydrothermal kettle, hydrothermally crystallized at 120°C for 24h, filtered, washed, dried at 110°C for 24h, and then calcined at 500°C for 5h to obtain PbO-MgO catalyst with 15% PbO loading.

Embodiment 2

[0024] The preparation steps of the PbO-MgO catalyst are the same as those in Example 1, except that magnesium chloride is used as the magnesium source to prepare a PbO-MgO catalyst with a PbO loading of 15%.

Embodiment 3

[0026] The preparation steps of the PbO-MgO catalyst are the same as in Example 1, but lead acetate is used as the lead source to prepare a PbO-MgO catalyst with a PbO loading of 15%.

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Abstract

The invention discloses a bimetallic composite oxide catalyst and preparation and application methods thereof. The bimetallic composite oxide catalyst mainly solves the problems such low yield of methyl phenyl carbonic ester and separating and recovery difficulty of catalysts. The bimetallic composite oxide catalyst is prepared by taking MgO as the carrier and 5-30% of PbO by weight percentage asthe active constituent to perform hydro-thermal synthesis at a calcination temperature of 400-600 DEG C; the bimetallic composite oxide catalyst is high in catalytic activity and selectivity when applied to synthesizing methyl phenyl carbonic ester through ester exchange reaction, has the advantages of being easy to separate and recycle from a reaction system, good in reusability and stability, free from environmental pollution and the like and accordingly achieves potential industrial application values.

Description

technical field [0001] The invention belongs to the technical field of metal catalysts, and in particular relates to a bimetallic composite oxide catalyst, a preparation method and an application. Background technique [0002] Methylphenyl carbonate (MPC) is an important organic chemical raw material and an important intermediate for the synthesis of diphenyl carbonate (DPC) by the transesterification of dimethyl carbonate (DMC) and phenol. The transesterification of DMC and phenol is considered to be one of the most promising industrial synthetic routes for the synthesis of DPC due to avoiding the use of highly toxic phosgene raw materials. This route is usually carried out in two steps: the first step is to generate intermediate MPC by transesterification of DMC and phenol ; In the second step, MPC continues to transesterify with phenol to generate DPC or generate DPC by disproportionation of MPC itself. In addition, MPC is also an important environmentally friendly organ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/14C07C68/06C07C69/96
CPCB01J23/14C07C68/06C07C69/96
Inventor 王松林牛红英曲黎祝勇李长恭刘萍
Owner HENAN INST OF SCI & TECH
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