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Method for separating and extracting raw material metal salt from wastewater in production of copper-based catalyst

A copper-based catalyst, raw metal technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as blank, achieve no secondary pollution and be environmentally friendly , the effect of simple operation

Active Publication Date: 2013-03-06
HAO HUA CHENGDU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no precedent for the process of recovering high-valent metal salts from the wastewater produced in the production process of copper-based co-precipitation catalysts, and the relevant patents and literature reports are also blank.

Method used

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  • Method for separating and extracting raw material metal salt from wastewater in production of copper-based catalyst
  • Method for separating and extracting raw material metal salt from wastewater in production of copper-based catalyst
  • Method for separating and extracting raw material metal salt from wastewater in production of copper-based catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The gas-phase hydrogenation catalyst process adopts a three-time beating process. The whole process has four centralized wastewater discharge points. The quality of the wastewater is shown in Table 1.

[0039] Table 1 Drainage water quality of each section of the three-time beating process

[0040]

[0041] Note: Me is polyvalent metal salt, calculated as anhydrous copper nitrate, the same below. Inlet and outlet water temperature is normal temperature, pH=6.0-6.5.

[0042] In the pretreatment stage, take the wastewater quality as the calculation standard, add 0.1% flocculant aqueous solution relative to the wastewater quality, the flocculant aqueous solution is an anionic polymerized acrylamide aqueous solution with a mass concentration of 0.1%, and a 5% polyaluminum chloride solution, and let it stand for 24 hours After the flocs settle down to the bottom of the sedimentation tank, the supernatant is filtered through quartz sand, activated carbon and 5μm PP filter e...

Embodiment 2

[0049] The methanol cracking hydrogen production catalyst process adopts the secondary beating process. The whole process has three centralized wastewater discharge points. The water quality of each stage is shown in Table 2.

[0050] Table 2 Drainage water quality of each section of the secondary beating process

[0051]

[0052] Note: The temperature of the incoming and outgoing water is room temperature, pH=7.5-8.0.

[0053] In the pretreatment stage, the wastewater quality is used as the calculation standard, and 4% flocculant aqueous solution relative to the wastewater quality is added. The combination of aqueous solution, let it stand for 48 hours, and wait for the flocs to settle to the bottom of the sedimentation tank, filter the supernatant through quartz sand, activated carbon and 10 μm PP filter elements to remove suspended particles and flocs in the wastewater, and obtain the filtrate; The quality of the treated wastewater is ss≤20mg / L, and the concentration of...

Embodiment 3

[0060] The synthetic methanol catalyst process adopts a three-time beating process. The whole process has four centralized wastewater discharge points. The water quality of each stage is shown in Table 3.

[0061] Table 3 Drainage water quality of each section of methanol catalyst three times beating process

[0062]

[0063] Note: The temperature of the incoming and outgoing water is room temperature, pH=7.5-8.0.

[0064] In the pretreatment stage, the waste water quality is used as the calculation standard, and 2.0% flocculant aqueous solution relative to the waste water quality is added. The flocs settle to the bottom of the sedimentation tank, and the supernatant is filtered through quartz sand, activated carbon and 10μm PP filter element to remove suspended particles and flocs in the wastewater to obtain the filtrate; the quality of the pretreated wastewater is ss≤20mg / L , the concentration of sodium nitrate aqueous solution (by weight of sodium nitrate) is about 2.0%...

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Abstract

The invention discloses a method for separating and extracting raw material metal salt from wastewater in production of a copper-based catalyst. The method comprises the following steps of 1. separating and collecting the wastewater; 2. pretreating the wastewater; 3. concentrating an RO (reverse osmosis) membrane; and 4. separating an NF (nanofiltration) membrane. The method has the advantages that the high valence metal salt can be recovered from the wastewater and utilized according to each process for producing the copper-based catalyst, the recovery rate reaches more than 90%, the operation is simple, the secondary pollution is avoided, the efficiency is high, the economy is realized, the environment-friendly effect is realized, and the like. The timely treatment of the wastewater is carried out through the whole catalyst production line, the wastewater generated in different working sections is separated and collected, the necessary assurance is provided for the subsequent separating treatment of the wastewater, and the uniformity of the economy and the technique is realized in the whole process.

Description

technical field [0001] The invention belongs to the technical field of waste water purification and recycling, and in particular relates to a method for separating and extracting raw materials from waste water for producing catalysts. Background technique [0002] In recent decades, the production technology of copper-based catalysts in my country has been greatly developed. Copper-based catalysts for medium and low pressures have been successfully developed, and production management has also been improved. During the preparation of copper-based catalysts, whether it is the preparation and filtration of the mother liquor or the washing of the precipitated filter cake and other multi-stage processes, the precipitated substances will dissolve in a small amount in the water. At the same time, the wastewater generated by the production line will also contain a lot of high-valent metal salts such as copper and zinc that have not completely reacted. According to statistics, taki...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 邹鑫张晓阳黄益平胡志彪
Owner HAO HUA CHENGDU TECH
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