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Zero-discharge water recycling process used in copper-based catalyst co-precipitation production

A copper-based catalyst, co-precipitation technology, used in catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc.

Inactive Publication Date: 2013-01-30
HAO HUA CHENGDU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006]Currently, the copper-based co-precipitation catalyst wastewater treatment process goes deep into the catalyst production process and achieves "zero" discharge of wastewater from the entire production line, which is unprecedented in China Precedents, related patents and literature reports are also blank

Method used

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  • Zero-discharge water recycling process used in copper-based catalyst co-precipitation production
  • Zero-discharge water recycling process used in copper-based catalyst co-precipitation production
  • Zero-discharge water recycling process used in copper-based catalyst co-precipitation production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Synthetic methanol catalyst process adopts three beating process. The whole process has four concentrated water points and four concentrated waste water discharge points. The water quality of each stage is as follows:

[0039] Table 1 Water and drainage water quality in each section of the three-time beating process

[0040] .

[0041] Note: The water temperature of the inlet and outlet water is 75°C, pH=6.5-7.0.

[0042] It can be seen from Table 1 that the drainage water quality of the third beating section can reach the water quality and quantity of the secondary beating section, and it can directly enter the production line of the next production cycle after being stored in the storage tank. The drainage of the secondary beating section is also the same as the water used in the primary beating section. Therefore, the water points of the overall production line can be attributed to the raw material liquid preparation section and the third beating section; the dra...

Embodiment 2

[0055] The methanol cracking hydrogen production catalyst process adopts two beating processes. The whole process has three centralized water points and three centralized wastewater discharge points. The water quality of each stage is as follows:

[0056] Table 2 Water and drainage water quality in each section of the double beating process

[0057] .

[0058] Note: The water temperature of the inlet and outlet water is 75°C, pH=6.5-7.0.

[0059] It can be seen from Table 2 that the drainage water quality of the secondary beating section cannot reach the quality and quantity of water used in the primary beating section, and the process of direct reuse to the production line cannot be adopted. At the same time, the amount of waste water is small, and direct waste water mixing and concentration treatment can be used. Comprehensive waste water: 4.5 m 3 / h,w(NaNO 3 )=0.67%.

[0060] Water balance (in hourly consumption) see Figure 4 .

[0061] Wastewater treatment ...

Embodiment 3

[0066] The gas-phase hydrogenation catalyst process adopts a three-time beating process. The whole process has four centralized water points and four centralized wastewater discharge points. The water quality of each stage is as follows:

[0067] Table 3 Water and drainage water quality in each section of the three-time beating process

[0068] .

[0069] Note: The water temperature of the inlet and outlet water is 75°C, pH=6.5-7.0.

[0070] As can be seen from Table 3, the wastewater index is similar to the water quality in Example 1, and the same workshop reuse method can be used. In addition, the water volume is relatively large, and the wastewater quality is relatively stable through the adjustment of the regulating tank, which can be treated in the form of a fixed concentration ratio.

[0071] Wastewater treatment process: the wastewater from the mother liquor section and the beating section are collected in sections, the mother liquor is concentrated by one-stage rev...

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Abstract

The invention discloses a water recycling process used in a copper-based catalyst production process. The invention belongs to the technical field of copper-based catalyst preparation. According to the invention, a sodium nitrate aqueous solution obtained by precipitation and filtration of the copper-based catalyst, and a sodium nitrate aqueous solution obtained in a filter cake washing process are processed through a water-processing system with reverse osmosis as a core processing manner; when fresh water reaches a reutilization standard, the fresh water is reutilized in a production line; and concentrated sodium nitrate aqueous solution is subjected to multi-effect evaporation, such that a sodium nitrate product is obtained. The technology is suitable to be used in production processes of copper-based catalyst used in methanol synthesis, methanol cracking hydrogen production, gas-phase dehydrogenation, gas-phase hydrogenation, carbon monoxide low-temperature shift, and the like.

Description

technical field [0001] The invention relates to a water recycling process in the production process of copper-based catalysts, and belongs to the technical field of copper-based catalyst preparation processes. Background technique [0002] The preparation of copper-based catalysts in my country has made great progress. After 50 years of hard work, some of the latest models have reached the world's advanced level. In the preparation process of copper-based catalysts, a large amount of deionized water is required for both the preparation of mother liquor and the washing of precipitated filter cakes. According to statistics, the production water consumption per ton of copper-based catalysts is about 300 tons, causing While the waste of water resources is great, it also aggravates the load of wastewater treatment. [0003] Today, the voice of cleaner production is getting stronger and stronger, and my country has incorporated industrial cleaner production into an important stra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10B01J37/03B01J23/80
Inventor 张晓阳邹鑫胡志彪胡高荣徐晓峰李倩黄宏
Owner HAO HUA CHENGDU TECH
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