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A kind of zinc sulfate impurity removal method

A technology of zinc sulfate and zinc sulfate solution, applied in directions such as zinc sulfate, can solve problems such as high cost and excessive zinc powder, and achieve the effects of low cost, rapid reaction and easy factory operation

Active Publication Date: 2022-04-01
江西省愚人纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to prevent the introduction of other impurities such as copper and antimony, excessive zinc powder is required and the cost is high

Method used

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  • A kind of zinc sulfate impurity removal method
  • A kind of zinc sulfate impurity removal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] S1. The zinc source reacts with sulfuric acid to form a crude zinc sulfate solution, which is filtered and preliminarily removed to detect the content of lead and nickel;

[0026] S2. The temperature of the zinc sulfate solution was raised to 60° C., and a mixed solution of sodium thiocarbamate and thiourea with a nickel content of 15 times was added by weight ratio, stirred for 1.5 hours, and filtered to obtain a refined zinc sulfate solution.

[0027] Wherein the mixed solution of sodium thiourea and sodium thiourea is, by weight, sodium thiourea: the ratio of water is 1: 1: 2.

Embodiment 2

[0029] S1. The zinc source reacts with sulfuric acid to form a crude zinc sulfate solution, which is filtered and preliminarily removed to detect the content of lead and nickel;

[0030] S2. The temperature of the zinc sulfate solution was raised to 65° C., and a mixed solution of sodium thiocarbamate and thiourea with a nickel content of 15 times was added by weight ratio, stirred for 1 hour, and filtered to obtain a refined zinc sulfate solution.

[0031] Wherein the mixed solution of sodium thiourea and sodium thiourea is, by weight, sodium thiourea: the ratio of water is 1: 1: 4.

Embodiment 3

[0033] S1. The zinc source reacts with sulfuric acid to form a crude zinc sulfate solution, which is filtered and preliminarily removed to detect the content of lead and nickel;

[0034] S2. Heat the zinc sulfate solution to 65° C., add a mixed solution of sodium thiocarbamate and thiourea with a nickel content of 12 times by weight, stir for 1.5 hours, and filter to obtain a refined zinc sulfate solution.

[0035] Wherein the mixed solution of sodium thiourea and sodium thiourea is, by weight, sodium thiourea: the ratio of water is 1: 1: 2.

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Abstract

The invention provides a zinc sulfate impurity removal method. The specific steps are: S1. Zinc source reacts with sulfuric acid to generate a crude zinc sulfate solution, after filtration, initially removes impurities, detects the content of lead and nickel; S2. heats up the zinc sulfate solution, adds a mixed solution of sodium thiocarbamate and thiourea, and stirs Filter to obtain refined zinc sulfate solution. The mixed solution of sodium thiourea and thiourea is specifically, by weight, sodium thiourea: thiourea: the ratio of water is 1: 1 ~ 3: 2 ~ 5; A mixed solution of urea. The invention utilizes the synergistic effect of sodium thiocarbamate and thiourea to simultaneously remove lead and nickel in zinc sulfate, has simple process, low cost of added reagents, is easy to operate in a factory, and has high practical value.

Description

technical field [0001] The invention relates to the field of zinc sulfate impurity removal, in particular to a zinc sulfate impurity removal method. Background technique [0002] Zinc sulfate heptahydrate is a kind of chemical substance. Its common name is zinc alum and gallonite. In the production of zinc sulfate heptahydrate, the quality must be up to standard, and impurity removal is the key. Zinc oxide and sulfuric acid react to produce zinc sulfate, and the formed zinc sulfate solution often contains iron, manganese, lead, nickel, cadmium and other magazines. Generally speaking, impurities such as iron and manganese are easy to remove, but lead, nickel, cadmium, etc. are not easy to remove, which affects product quality. The existing measures are based on the principle that the activity of nickel and cadmium is greater than that of hydrogen and less than that of zinc, replacing them with zinc powder, but it is easy to produce anti-dissolution. [0003] The prior art "...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G9/06
CPCC01G9/06
Inventor 邓亮群黄少华
Owner 江西省愚人纳米科技有限公司
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