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

A technology for the recycling and treatment of organic silicon waste contacts, which is applied in the direction of physical/chemical process catalysts, organic chemistry, chemical instruments and methods, etc., and can solve problems such as high cost

Inactive Publication Date: 2014-09-24
INST OF PROCESS ENG CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 provide a method for recycling and treating organosilicon waste contacts as raw materials to prepare multi-element composite copper catalysts

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, add 7.2kg of ammonia (25.0wt%) and 3.4kg of ammonium carbonate to 25.0kg of water to form a mixed solution (the molar ratio of ammonia to ammonium carbonate is 3.0), and then add 10.6kg of waste contact (Containing 15.0wt% copper and 1.5wt% zinc), stirring with air at 50℃ for 5h, after centrifugal separation, 1.6kg sodium sulfite is added to the blue mother liquor, then the temperature is raised to 70℃, holding for 6h, the ammonia gas escaped 10wt% ammonia water can be used as raw material for impregnating waste contacts for recycling. Add 5.0kg of dilute sulfuric acid (sulfuric acid concentration 20.0wt%) to the mother liquor after ammonia distillation, and adjust the pH to 3.5. At this time, a large amount of yellow precipitate is precipitated, and then the temperature is raised to 120°C for 8h, and the precipitate turns from yellow to brick red. The precipitate was centrifuged, washed and dried to obtain 1.75 kg of finished cuprous oxide...

Embodiment 2

[0089] In a 50L glass-lined reactor, add 8.0kg of ammonia (25.0wt%) and 5.6kg of ammonium carbonate to 25.0kg of water to form a mixed solution (the molar ratio of ammonia to ammonium carbonate is 2.0), and then add 13.6kg of waste contact (Containing 15.0wt% copper and 1.5wt% zinc), stirring with air at 40°C for 7h, after centrifugal separation, add 2.0kg sodium sulfite to the blue mother liquor, then heat to 80°C, keep it warm for 5h, and escape ammonia 10wt% ammonia water can be used as raw material for impregnating waste contacts for recycling. 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 amount of yellow precipitate is precipitated, and then the temperature is raised to 130°C for 6h, and the precipitate turns from yellow to brick red. The precipitate is centrifuged, washed and dried to obtain 2.2 kg of finished cuprous oxide with a purity of 98.5% an...

Embodiment 3

[0094] In a 50L glass-lined reactor, add 6.0kg of ammonia (25.0wt%) and 2.1kg of ammonium carbonate to 25.0kg of water to form a mixed solution (the molar ratio of ammonia to ammonium carbonate is 4.0), and then add 12.9kg of waste contact (Containing copper 15.0wt%, zinc 1.5wt%), stirring with air at 60°C for 1h, after centrifugal separation, add 1.9kg sodium sulfite to the blue mother liquor, then heat to 90°C, keep it warm for 5h, and escape ammonia 10wt% ammonia water can be used as raw material for impregnating waste contacts for recycling. Add 4.5kg of dilute sulfuric acid (sulfuric acid concentration 20.0wt%) to the mother liquor after ammonia distillation, and adjust the pH to 4.0. At this time, a large amount of yellow precipitate is precipitated, and then the temperature is raised to 130°C for 6h, and the precipitate turns from yellow to brick red. The precipitate was centrifuged, washed, and dried to obtain 2.1 kg of finished cuprous oxide with a purity of 98.0% and...

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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 waste organosilicon contacts. Background technique [0002] Methylchlorosilane is the most important organic silicon monomer used in the preparation of organic silicon materials, and is the foundation and pillar of the entire organic silicon industry. E.G. Rochow invented the direct synthesis of methylchlorosilane technology in 1940. So far, the direct method is still the only method to produce methylchlorosilane in industry. Simply put, the direct method is a series of monomers of methylchlorosilane generated by the reaction of silicon powder and methyl chloride under the action of a copper catalyst. The currently commercialized copper catalysts are mainly partially oxidized copper powder or cuprous chloride. Due to its poor stability, cuprous chloride is easy to d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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