Stanniferous catalyst promoter

A co-catalyst and content technology, which is applied in the synthesis reaction of organosilicon monomers and the field of tin-containing co-catalysts, can solve the problem that the co-catalyst tin component is difficult to promote the catalytic effect, the synthesis reaction cannot reach the optimal state, and the reaction cannot reach the optimum state. The best effect and other issues, to achieve the effect of improved synthetic reaction activity, significant economic benefits, and reduce unnecessary loss

Inactive Publication Date: 2014-11-12
湖南省天心博力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the amount of tin added in the fluidized bed reaction system is not much, and the tin, silicon powder, and copper powder added to the fluidized bed are often difficult to achieve very uniform mixing, it is difficult to give full play to the tin component of the promoter. Co-catalysis, the synthesis reaction in the fluidized bed cannot reach the optimal state
In addition, when the state of the industrial fluidized bed is unstable, part of the tin powder, especially the ultrafine particles in the tin powder, is easy to be carried out from the local channel flow or unevenly distributed in the bed, which will make the reaction unable to reach the optimum level. The best effect, can not fully play the role of tin as a co-catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0033] Examples of the mass percentage of the main components of the tin-containing co-catalyst:

[0034] Preferably, in the tin-containing cocatalyst:

[0035] Cu(20.5%), Cu 2 O (45.2%), CuO (23.5%), Al (9.2%), oxygen content (10.3%), among which, Pb (56ppm), Fe (350ppm), and other metal impurities are less than 45ppm;

[0036] Preferably, in the tin-containing co-catalyst, the particle surface treatment agent is used in mass percentage (0.6%), and the other non-metallic impurities are less than 50 ppm;

[0037] Preferably, the particle size D of the tin-containing cocatalyst 50 =25.7μm, D 90 =95.4μm;

[0038] Preferably, the particle morphology of the tin-containing co-catalyst is one or any combination of irregular shape and flake shape.

specific Embodiment 2

[0039] Examples of the mass percentage of the main components of the tin-containing co-catalyst:

[0040] Preferably, in the tin-containing cocatalyst:

[0041] Cu(15.6%), Cu 2 O (34.5%), CuO (18.5%), Si (20.5%), Sn (9.3%), oxygen content (7.9%), among them, Pb (58ppm), Fe (0.10%), other metal impurities single item< 500ppm;

[0042] Preferably, for the tin-containing co-catalyst, the particle surface treatment agent is used in mass percentage (0.4%), and the other non-metallic impurities are less than 50 ppm.

[0043] Preferably, the particle size D of the tin-containing cocatalyst 50 =56.5μm, D 90 =286.3μm;

[0044] Preferably, the particle morphology of the tin-containing co-catalyst is one of irregular shape and curled flake shape or any combination of both.

specific Embodiment 3

[0045] Examples of the mass percentage of the main components of the tin-containing co-catalyst:

[0046] Preferably, in the tin-containing cocatalyst:

[0047] Cu (29.5%), Si (60.5%), Sn (8.5%), oxygen content (0.3%), of which Pb (56ppm), Fe (0.28%), and other metal impurities are less than 500ppm;

[0048] Preferably, for the tin-containing co-catalyst, the particle surface treatment agent is used in mass percentage (0.7%), and the other non-metallic impurities are less than 50 ppm

[0049] Preferably, the particle size D of the tin-containing cocatalyst 50 =59.3μm, D 90 =324.3μm;

[0050] Preferably, the particle morphology of the tin-containing co-catalyst is one of irregular shape and curled flake shape or any combination of both.

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Abstract

Provided is a stanniferous catalyst promoter. The stanniferous catalyst promoter is used for an organosilicone monomer synthetic reaction and preferentially selected as a catalyst promoter in a dimethyl dichlorosilane synthetic reaction copper base catalysis system. Tin is evenly distributed and combined with a carrier, so that on one hand, uniform mixing of tin, silicon and the like in a fluidized bed is facilitated, and reaction efficiency is improved; on the other hand, unnecessary losses of tin in the industrial production are lowered. Compared with the method that tin is added to a fluidized bed reaction system in a granular metal tin powder manner in the prior art, the stanniferous catalyst promoter has the advantages that the content of harmful impurities of tin components is low, purity is high, the tin-assisted catalyst components can be evenly added to a synthetic reaction system when the stanniferous catalyst promoter is used for organosilicone monomer synthesis, the utilization efficiency of tin is improved, oxidation films on silica powder and surfaces of contacts can be well eliminated, activity of the synthetic reaction can be improved, the space time yield of the fluidized bed is increased, cost of industrial production is reduced, and remarkable economical benefits are obtained.

Description

Technical field [0001] The invention relates to the synthesis reaction of organosilicon monomers, in particular to the field of co-catalysts in a copper-based catalytic system in the synthesis of dimethyldichlorosilane, and more specifically to a tin-containing co-catalyst. Background technique [0002] Dimethyldichlorosilane, also known as dimethyl or M2 in industry, is one of the most important organosilicon monomers, and its amount accounts for more than 90% of the total monomers. It is a downstream product for preparing organosilicon. For example, important raw materials such as silicone oil, silicone rubber, silicone resin and silane coupling agent. [0003] Dimethyldichlorosilane is chemically synthesized from metal silicon powder and methyl chloride with a catalyst (including main catalyst and promoter) and in a fluidized bed at a temperature of about 300°C. The synthesis reaction is gas-solid. -Solid heterogeneous contact catalyzed exothermic reaction, and its reaction mec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/835
Inventor 张拥军莫文剑钟耀宗易翠
Owner 湖南省天心博力科技有限公司
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