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Preparation and application of mesoporous molecular sieve supported noble metal catalyst

A noble metal catalyst and molecular sieve technology, applied in molecular sieve catalysts, hydrogen halide addition preparation, physical/chemical process catalysts, etc., can solve specific surface area, rich pore structure and surface functional group gap, unable to burn carbon regeneration, and accelerate mercury Problems such as loss and consumption, to achieve good catalytic activity and stability

Inactive Publication Date: 2012-01-04
李伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, because the catalyst uses activated carbon as a carrier, it is easy to pulverize and lose during the use of the catalyst, and the catalyst cannot be regenerated after carbon deposition and deactivation, which accelerates the loss and consumption of mercury.
In response to this, while developing mercury-free catalysts, researchers have also studied their supports, trying to use silica or alumina as supports with high mechanical strength and high temperature resistance sintering, but the results are not ideal. There is a big difference in specific surface area, rich pore structure and surface functional groups compared with

Method used

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  • Preparation and application of mesoporous molecular sieve supported noble metal catalyst

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Experimental program
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Effect test

Embodiment 1

[0016] Take 100g of MCM-41 carrier, add it to 300g of absolute ethanol solution containing 10% KH-560 silane coupling agent, stir and impregnate at 40°C for 2h, then suction filter, and dry at 120°C for 4h. Take 0.5g HAuCl 4 4H 2 O was dissolved in 250g of deionized water, stirred and dissolved, and 100g of MCM-41 carrier modified by KH-560 was added, immersed for 2h under ultrasonic conditions, then suction filtered, and dried at 120°C for 6 hours. That is, the gold catalyst supported by MCM-41 was obtained. The catalyst is at 160°C, 160h -1 Catalytic activity and stability were evaluated under the conditions of space velocity, hydrogen chloride and acetylene molar ratio of 1.2:1, and the analysis results are shown in figure 1 .

Embodiment 2

[0018] HAuCl 4 4H 2 The add-on of O is 1.0g, and all the other are with embodiment 1, and analysis result sees figure 1 .

Embodiment 3

[0020] Add 5.0 g CuCl to the active ingredient solution 2 , the rest are the same as in Example 1, and the analysis results are shown in figure 1 .

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Abstract

The invention discloses a mesoporous molecular sieve MCM-41 supported noble metal catalyst and application thereof in vinyl chloride synthesis by an acetylene method. In the catalyst, silane coupling agent modified MCM-41 is taken as a vector to load 0.1 to 5 percent of gold chloride and 0.5 to 10 percent of non-noble auxiliaries through ultrasonic immersion. The catalyst has good catalytic activity in vinyl chloride synthesis by the acetylene method, has the capability of deactivation and regeneration, and has remarkable advantages compared with an activated carbon vector catalyst.

Description

technical field [0001] The invention relates to the preparation and application of a mesoporous molecular sieve-supported noble metal catalyst, more specifically, a preparation method of an MCM-41 mesoporous molecular sieve-supported noble metal catalyst and its application in the synthesis of vinyl chloride by the acetylene method. Background technique [0002] Polyvinyl chloride (PVC) is one of the top five engineering plastics in the world and is widely used in various industries. Vinyl chloride is the monomer used to synthesize polyvinyl chloride. At present, the synthesis methods of vinyl chloride monomer in the world mainly include ethane method, ethylene method and acetylene method. In my country, restricted by the special energy structure, about 70% of vinyl chloride monomer is produced by acetylene method. , the process route has been using highly toxic mercuric chloride loaded on activated carbon as a catalyst, which not only endangers the health of operators, bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/74B01J29/76B01J29/78C07C21/06C07C17/08
Inventor 李伟王寰韩冲傅斌
Owner 李伟
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