Recovering method for vanadium catalyst in pigment wastewater

A recovery method and catalyst technology, applied in chemical instruments and methods, water/sewage treatment, improvement of process efficiency, etc., can solve the problems of difficult recovery of vanadium, environmental pollution, waste, etc.

Inactive Publication Date: 2018-12-25
绍兴齐英膜科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the vanadium catalyst is discharged directly without treatment, it will not only cause waste, but also pollute the environment and bring environmental protection problems to enterprises.
[0003] In the prior art, ammonium salts are usually used as precipitants to precipitate vanadium catalysts. Although the effect is relatively obvious, ammonium roots will be introduced into the wastewater, which will bring about a new problem of excessive ammonia nitrogen in wastewater.
[0004] Some enterprises will also use vanadium removal agent to achieve the purpose of vanadium removal through flocculation and sedimentation, but they have not disclosed how to further treat the residual vanadium. The vanadium content is reduced to below 0.5mg / L, but the obtained vanadium is not easy to recover and cannot be directly used in the production of ceramic pigments

Method used

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  • Recovering method for vanadium catalyst in pigment wastewater
  • Recovering method for vanadium catalyst in pigment wastewater
  • Recovering method for vanadium catalyst in pigment wastewater

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0028] Below in conjunction with specific embodiment the present invention is described in further detail:

[0029] The embodiment of the present application is used to treat inorganic ceramic pigment wastewater and recover the vanadium catalyst in it. The effluent meets the national discharge requirements and can be discharged directly, and the recovered vanadium can be reused in the production of ceramic pigments.

[0030] Embodiment 1~6 is the test that preparation simulates vanadium-containing waste water and carries out precipitation operation, and its process is:

[0031] Add 20 g of sodium metavanadate to 2 L of tap water, and add liquid caustic soda to adjust the pH to 12.18. The vanadium content is 3875mg / L, and it precipitates for 2 hours after adding the precipitating agent.

[0032] Table 1 is the test parameter involved in embodiment 1~6

[0033] Table 1 The test parameters involved in embodiments 1 to 6

[0034]

[0035] From the data in Table 1, it can be ...

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PUM

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Abstract

The invention discloses a recovering method for a vanadium catalyst in pigment wastewater, and belongs to the technical field of the vanadium catalyst recovery. The method comprises the following steps: (1) pre-processing: adding a precipitant to the pigment wastewater containing the vanadium catalyst and generating a precipitate and supernatant fluid, wherein the precipitant is inorganic acid; and (2) adsorption-processing: after adsorbing through feeding the supernatant fluid into an adsorption device, to obtain effluent, wherein the adsorption device is internally provided with an adsorption material. The method is used for processing the inorganic ceramic pigment wastewater and recovering the vanadium catalyst in the wastewater, the effluent is in comply with requirements of national standard emission, and can be directly discharged, and recovered vanadium can be reused for ceramic pigment production.

Description

technical field [0001] The invention relates to the technical field of vanadium catalyst recovery, in particular to a method for recovering vanadium catalyst in pigment wastewater. Background technique [0002] Ceramic pigments are a general term for pigments used on ceramics, including pigments for glaze, underglaze, glaze and body coloring. During the production of ceramic pigments, strong alkaline wastewater will be produced, with a pH of about 12, which also contains about 4g / L of vanadium catalyst. If the vanadium catalyst is discharged directly without treatment, it will not only cause waste, but also pollute the environment and bring hidden dangers of environmental protection problems to enterprises. [0003] In the prior art, ammonium salts are usually used as precipitants to precipitate vanadium catalysts. Although the effect is relatively obvious, ammonium roots will be introduced into the wastewater, which will bring about a new problem of excessive ammonia nitro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C22B7/00C22B34/22
CPCC02F1/28C02F1/5245C22B7/008C22B34/225Y02P10/20
Inventor 耿啸天陶旭东李刚丁超
Owner 绍兴齐英膜科技有限公司
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