A kind of preparation method of high-purity homogeneous zinc sulfate heptahydrate

A high-purity technology of zinc sulfate heptahydrate, applied in the field of preparation of high-purity homogeneous zinc sulfate heptahydrate, can solve the problems of agglomeration, low product purity, complicated process, etc., and achieves the advantages of preventing agglomeration phenomenon, simple preparation process and low energy consumption. Effect

Active Publication Date: 2022-07-01
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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Effect test

Embodiment 1

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

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

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

Embodiment 2

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

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

[0032] S2: carry out mixed extraction with a sulfuric acid sol...

Embodiment 3

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

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

[0038] S2: carry out mixed ext...

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Abstract

The invention discloses a preparation method of high-purity homogeneous zinc sulfate heptahydrate, comprising the following steps: S1: preparing an aqueous solution of zinc salt and preparing a composite extractant; mixing and extracting the two, standing, separating phases, taking an organic phase, and obtaining an organic phase containing Zn 2+ The microemulsion A of the 4 2‑ The microemulsion B; S3: will contain Zn 2+ of microemulsion A and containing SO 4 2‑ The obtained microemulsion B is mixed, stirred, the reaction produces a white precipitate, and the solid-liquid is separated, and the obtained precipitate is high-purity homogeneous zinc sulfate heptahydrate. The preparation method of zinc sulfate heptahydrate of the invention has the advantages of low cost, simple operation, easy batch preparation, high purity of the obtained product and uniform 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 a method for preparing zinc sulfate heptahydrate, in particular to a method for preparing high-purity homogeneous zinc sulfate heptahydrate. Background technique [0002] Zinc sulfate heptahydrate (zinc sulfate heptahydrate), alias zinc alum, Hao alum, is a chemical. It is white granules or powder at room temperature, easily soluble in water, slightly soluble in alcohol and glycerol, 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 heptahydrate first, and then carry out refining to obtain, the crude product preparation method includes synthesis method, chlorination method, sulfuric acid leaching method, etc., the existing preparatio...

Claims

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Application Information

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Patent Type & Authority Patents(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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