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Preparation method of high-purity homogeneous zinc sulfate heptahydrate

A high-purity technology of zinc sulfate heptahydrate, which is applied in the field of preparation of high-purity homogeneous zinc sulfate heptahydrate, can solve problems such as low product purity, complex process, and agglomeration, and achieve simple preparation process, low energy consumption, and prevention of agglomeration Effect

Active Publication Date: 2021-04-09
浙江爱科新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above deficiencies in the prior art, the object of the present invention is to provide a preparation method of high-purity homogeneous zinc sulfate heptahydrate, to solve the complex process of the existing preparation method of zinc sulfate heptahydrate, low product purity, serious problems such as agglomeration

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0024] The preparation method of the high-purity homogeneous zinc sulfate heptahydrate of the present embodiment, it may further comprise the steps:

[0025] S1: Prepare an aqueous zinc salt solution, the zinc salt is zinc chloride, the concentration of the zinc salt is 0.3mol / L, and adjust the pH to 1; prepare a composite extractant, the composite extractant is p-toluenesulfonic acid and N235 As an extractant, it is obtained after dilution with n-octane; the concentration of the compound extractant is 0.1g / mL, and the molar ratio of p-toluenesulfonic acid and N235 is 1:1; the prepared zinc salt solution and compound The extractant is mixed and extracted, the volume ratio of the zinc salt solution and the composite extractant is 1:2, let stand, separate the phases, take the organic phase, and obtain the Zn-containing 2+ The microemulsion A;

[0026] S2: Mix and extract the sulfuric acid solution with a molar concentration of 0.1mol / L and the compound extractant in step S1, th...

Embodiment 2

[0030] The preparation method of the high-purity homogeneous zinc sulfate heptahydrate of the present embodiment, it may further comprise the steps:

[0031] S1: Prepare an aqueous solution of zinc salt, the zinc salt is zinc chloride, the concentration of the zinc salt is 0.5mol / L, and adjust the pH to 2; prepare a composite extractant, the composite extractant is 3-ethyl-benzene Sulphonic acid and N1923 are used as extractant, and obtained after diluting with n-heptane; The concentration of the composite extractant is 0.3g / mL, and the mol ratio of the 3-ethyl-benzenesulfonic acid and N1923 is 1:1; The prepared zinc salt solution and the composite extractant are mixed and extracted, the volume ratio of the zinc salt solution and the composite extractant is 1:5, let stand, separate the phases, take the organic phase, and obtain the Zn-containing 2+ The microemulsion A;

[0032] S2: Mix and extract the sulfuric acid solution with a molar concentration of 0.6mol / L and the compo...

Embodiment 3

[0036] The preparation method of the high-purity homogeneous zinc sulfate heptahydrate of the present embodiment, it may further comprise the steps:

[0037] S1: Prepare an aqueous zinc salt solution, the zinc salt is zinc nitrate, the concentration of the zinc salt is 1mol / L, and adjust the pH to 4; prepare a composite extractant, the composite extractant is 2-methyl-5-iso Propylbenzenesulfonic acid and TOA are used as extractant, and obtain after diluting with n-hexane; The concentration of the composite extractant is 0.5g / mL, and the molar amount of the 2-methyl-5-isopropylbenzenesulfonic acid and TOA The ratio is 1:1; the prepared zinc salt solution and the composite extractant are mixed and extracted, the volume ratio of the zinc salt solution and the composite extractant is 1:8, let stand, separate the phases, take the organic phase, and obtain the Zn 2+ The microemulsion A;

[0038] S2: Mix and extract the sulfuric acid solution with a molar concentration of 1 mol / L a...

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Abstract

The invention discloses a preparation method of high-purity homogeneous zinc sulfate heptahydrate, wherein the preparation method comprises the following steps: S1, preparing a zinc salt aqueous solution, and preparing a composite extractant; and carrying out mixed extraction, standing and phase splitting on the two solutions, and taking an organic phase to obtain a microemulsion A containing Zn<2+>; S2, carrying out mixed extraction on a sulfuric acid solution and a composite extraction agent, standing, carrying out phase splitting, and taking an organic phase to obtain a microemulsion B containing SO4<2->; and S3, mixing the microemulsion A containing Zn<2+> and the microemulsion B containing SO4<2->, stirring, reacting to generate a white precipitate, carrying out solid-liquid separation to obtain a precipitate which is high-purity homogeneous zinc sulfate heptahydrate, carrying out acid washing and water washing purification on the obtained organic phase, and returning to recycle. The preparation method of zinc sulfate heptahydrate is low in cost, simple to operate and easy for batch preparation, and the obtained product is high in purity and uniform in particle size distribution, and can meet the use requirements of special industrial fields.

Description

technical field [0001] The invention relates to the technical field of preparation methods of zinc sulfate heptahydrate, in particular to a preparation method of high-purity homogeneous zinc sulfate heptahydrate. Background technique [0002] Zinc sulfate heptahydrate, also known as zinc alum and alum, is a chemical. It is white granule or powder at normal temperature, easily soluble in water, slightly soluble in alcohol and glycerin, insoluble in liquid ammonia and ketone. Zinc sulfate heptahydrate is a very important industrial raw material, widely used in chemical industry, medicine, agriculture, electrolysis, electroplating and other fields. The preparation method of zinc sulfate heptahydrate usually needs to prepare the crude product of zinc sulfate first, and then obtain it by refining. The preparation method of crude product includes synthesis method, chlorination method, sulfuric acid leaching method, etc. Complexity, high preparation cost, low product purity, seri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/06B82Y40/00
CPCC01G9/06C01G9/003B82Y40/00C01P2004/64C01P2006/80
Inventor 周海东张志峰余瑶辰
Owner 浙江爱科新材料有限公司
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