A kind of flaky copper-zinc alloy powder promoter

Abstract

The invention discloses a sheet type copper-zinc alloy powder promoter. By adopting constant analysis, the Cu content is 50 to 95 wt percent; the Zn content is 5 to 49 wt percent; by adopting ICP detection, Pb is less than or equal to 120 ppm, Fe is less or equal to 500 ppm, and other metal impurity monomers are less than or equal to 50 ppm; other non-metal impurity monomers are less than or equal to 30 ppm; the surface treating agent is 0.1 to 1.0 wt percent; by adopting hydrogen damage meter detection, the oxygen content is less than or equal to 0.5 percent; and by adopting scanning electron microscope observation, the thickness is 0.1 to 1.0 micron. The sheet type copper-zinc alloy powder promoter is high in specific area, high in purity and low in harmful impurity and is applied to organic silicon monomer; side effects of harmful impurities and gathered carbon in a reaction process are avoided; a promotion effect is relatively good; the activity of a contact, the silicon powder conversion rate and the space time yield of a fluidized bed are improved; the cost is reduced; and the benefit is increased.

Description

technical field [0001] The invention relates to a cocatalyst, in particular to a flaky copper-zinc alloy powder cocatalyst. Background technique [0002] Organosilicon monomer is the basic raw material of the huge organosilicon industry. It is chemically synthesized by metal silicon and methyl chloride in a fluidized bed at a temperature of about 300°C by adding a catalyst (including a main catalyst and a co-catalyst). And obtain, its synthetic reaction belongs to gas-solid-solid heterogeneous contact catalytic exothermic reaction, and its reaction mechanism is complex. In addition to the main reaction, a variety of side reactions exist at the same time. Factors affecting the reaction process include fluidized bed structure, raw silicon powder, methyl chloride, catalyst, process parameters, etc., especially the reactivity of the main catalyst and its use with the co-catalyst. The comprehensive effect of selectivity, silicon powder conversion rate and so on. Although the am...

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Problems solved by technology

[0004] At present, Zn is added to the fluidized bed reaction system in the form of elemental granular Zn powder (or metal Zn powder) or its mixture with silicon powder in the flake metal pure copper powder catalytic system and ternary copper powder catalytic system. Due to the relatively small amount of Zn added and the specific surface area of ​​granular Zn powder is relatively small, it is difficult to achieve uniform mixing with silicon powder and copper powder after being added to an industrial fluidized bed, and the fluidized state in an industrial fluidized bed is often prone to instability , part of the Zn powder, especially ultrafine particles, is easy to be carried out from the local channel flow or unevenly distributed in the bed, which makes the catalytic effect of Zn compromised.