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Method for recovering substances from nitric acid system waste tin stripping waste liquid

A recycling method, nitric acid solution technology, applied in the field of recycling, can solve the problems of high recycling cost, and achieve the effect of low cost and simple realization process

Inactive Publication Date: 2020-12-01
惠州TCL环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that, aiming at the problem of high recovery cost in the prior art, the present invention provides a method for recovering substances from the waste liquid of tin stripping in nitric acid system

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  • Method for recovering substances from nitric acid system waste tin stripping waste liquid
  • Method for recovering substances from nitric acid system waste tin stripping waste liquid

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0031] The method for reclaiming substance from the waste tin stripping waste liquid of nitric acid system described in a preferred embodiment of the present invention, said method comprises the following steps:

[0032] Step S1, using the organic extractant LSZ1 to extract nitric acid from the waste tin stripping solution of the nitric acid system, the organic extractant LSZ1 is configured by using a hydrocarbon organic solvent and a phosphoric acid ester compound in a ratio of 1 to 15:1;

[0033] Specifically, the self-made organic extractant LSZ1 was used to extract nitric acid from t...

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Abstract

The invention relates to a method for recovering substances from nitric acid system waste tin stripping waste liquid. The substances at least comprise nitric acid and tin, the recovery method comprises the following steps: extracting nitric acid from waste tin stripping liquid of a nitric acid system by utilizing an organic extracting agent LSZ1, wherein the organic extracting agent LSZ1 is prepared from a hydrocarbon organic solvent and a phosphate ester compound according to a ratio of (1-15): 1; and extracting tin from the waste tin stripping waste liquid from which the nitric acid is extracted. According to the method, the nitric acid is extracted from the waste tin stripping liquid by utilizing the self-made organic extracting agent, the implementation process is simple, and the costis relatively low.

Description

technical field [0001] The invention relates to the technical field of recovery, in particular to a method for recovering substances from waste tin stripping waste liquid in a nitric acid system. Background technique [0002] The waste tin stripping solution in the nitric acid system mainly comes from the processes of etching and metal tin stripping in the circuit board manufacturing industry, in which tin is prone to form metastannic acid precipitation. The output of waste liquid is large, and the content of heavy metals and nitric acid is high. Generally, the waste tin stripping liquid produced in production contains 100g / L of tin, 30g / L of copper and iron, and 20-30% of nitric acid. The waste liquid is a hazardous waste, and if no effective means of recovery or improper treatment is adopted, it will inevitably cause waste of valuable metal resources and environmental pollution. Therefore, the resource recovery and utilization of the tin stripping solution in the nitric a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B25/06C22B15/00C25C1/12C25C1/14
CPCC22B7/006C22B25/04C22B25/06C22B15/0086C25C1/12C25C1/14Y02P10/20
Inventor 李振宏李红玲张亚红
Owner 惠州TCL环境科技有限公司