Method for preparing composite copper catalyst by recycling organic silicon waste contacts

A technology for organosilicon waste contact, recovery and treatment, applied in physical/chemical process catalysts, organic chemistry, chemical instruments and methods, etc., can solve problems such as high cost

Inactive Publication Date: 2012-08-01
INST OF PROCESS ENG CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the high cost of organosilicon-copper catalyst preparation at present, the purpose of the present invention is to provi

Method used

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  • Method for preparing composite copper catalyst by recycling organic silicon waste contacts
  • Method for preparing composite copper catalyst by recycling organic silicon waste contacts
  • Method for preparing composite copper catalyst by recycling organic silicon waste contacts

Examples

Experimental program
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Effect test

Embodiment 1

[0077] In a 50L glass-lined reactor, 7.2kg of ammonia water (25.0wt%) and 3.4kg of ammonium carbonate were added to 25.0kg of water to form a mixed solution (the molar ratio of ammonia to ammonium carbonate was 3.0), and then 10.6kg of waste contacts were added. (containing copper 15.0wt%, zinc 1.5wt%), stirred at 50°C with air for 5h, after centrifugation, added 1.6kg of sodium sulfite to the blue mother liquor, then raised the temperature to 70°C, kept it warm for 6h, the released ammonia gas Absorbed with 10wt% ammonia water, it can be recycled as a raw material for impregnating waste contacts. Add 5.0kg of dilute sulfuric acid (sulfuric acid concentration 20.0wt%) to the mother liquor after ammonia distillation, adjust the pH to 3.5, at this time, a large amount of yellow precipitates are precipitated, and then the temperature is raised to 120°C, kept for 8 hours, and the precipitates turn from yellow to brick red. The precipitate was centrifuged, washed and dried to obta...

Embodiment 2

[0089] In a 50L glass-lined reactor, 8.0kg of ammonia water (25.0wt%) and 5.6kg of ammonium carbonate were added to 25.0kg of water to form a mixed solution (the molar ratio of ammonia to ammonium carbonate was 2.0), and then 13.6kg of waste contacts were added. (containing copper 15.0wt%, zinc 1.5wt%), stirred at 40°C with air for 7h, after centrifugation, added 2.0kg of sodium sulfite to the blue mother liquor, then raised the temperature to 80°C, kept it warm for 5h, the released ammonia gas Absorbed with 10wt% ammonia water, it can be recycled as a raw material for impregnating waste contacts. Add 6.0kg of dilute sulfuric acid (sulfuric acid concentration 20.0wt%) to the mother liquor after ammonia distillation, and adjust the pH to 3.0. At this time, a large number of yellow precipitates are precipitated, and then the temperature is raised to 130°C, and the temperature is kept for 6 hours. The precipitate turns from yellow to brick. red. The precipitate was centrifuged, ...

Embodiment 3

[0094] In a 50L glass-lined reactor, 6.0kg of ammonia water (25.0wt%) and 2.1kg of ammonium carbonate were added to 25.0kg of water to form a mixed solution (the molar ratio of ammonia to ammonium carbonate was 4.0), and then 12.9kg of waste contacts were added. (containing copper 15.0wt%, zinc 1.5wt%), stirred at 60°C with air for 1h, after centrifugation, added 1.9kg of sodium sulfite to the blue mother liquor, then raised the temperature to 90°C, kept it warm for 5h, the released ammonia gas Absorbed with 10wt% ammonia water, it can be recycled as a raw material for impregnating waste contacts. Add 4.5kg of dilute sulfuric acid (sulfuric acid concentration: 20.0wt%) to the mother liquor after ammonia distillation to adjust the pH to 4.0. At this time, a large amount of yellow precipitates are precipitated, and then the temperature is raised to 130°C and kept for 6 hours. The precipitates change from yellow to brick. red. The precipitate was centrifuged, washed and dried to...

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Abstract

The invention relates to a method for preparing a composite copper catalyst by recycling organic silicon waste contacts. The method comprises the following steps of: performing ammonia leaching on the organic silicon waste contacts, adding sulfite into the solution, and performing ammonia distilling reduction; acidizing for precipitating, aging at high temperature to obtain zinc-containing mother liquor and precipitates, and treating the precipitates to obtain cuprous oxide powder; alkalinizing the zinc-containing mother liquor for precipitating, and treating to obtain zinc oxide powder; oxidizing a part of cuprous oxide powder to obtain copper oxide powder, and reducing a part of cuprous oxide powder to obtain copper powder; and mixing the cuprous oxide powder, the zinc oxide powder, the copper oxide powder and the copper powder, and grinding to obtain the composite copper catalyst. According to the composite copper catalyst for synthesizing methyl chlorosilane, products obtained by recycling the waste contacts are used as raw materials, so that the production cost of the copper catalyst is saved greatly, the recycling of the copper catalyst in the industry of organic silicon is realized, and the method has the obvious economic and environment-friendly benefits.

Description

technical field [0001] The invention relates to the field of methylchlorosilane catalysts, in particular to a preparation method for synthesizing a multi-element composite copper catalyst by recycling and processing organic silicon waste contacts. Background technique [0002] Methylchlorosilane is the most important organosilicon monomer used in the preparation of organosilicon materials, and is the foundation and pillar of the entire organosilicon industry. E.G. Rochow invented the direct synthesis of methylchlorosilane technology in 1940. So far, the direct method is still the only method for industrial production of methylchlorosilane. The direct method is simply a series of monomers of methylchlorosilane produced by the reaction of silicon powder and methyl chloride under the action of a copper catalyst. The commercialized copper catalysts are mainly partially oxidized copper powder or cuprous chloride. Due to its poor stability, cuprous chloride is easy to deteriorat...

Claims

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Application Information

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IPC IPC(8): B01J23/80C07F7/16
CPCY02P20/584
Inventor 苏发兵车红卫王莹利王光娜贾昭翟世辉朱德洪
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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