Copper sulfate pentahydrate crystal and preparation method thereof

A technology of copper sulfate pentahydrate and copper sulfate solution, which is applied in the direction of copper sulfate, copper compound preparation, chemical instruments and methods, etc., can solve the problems of complexity, low water content, and long preparation process, and achieve the method of environmental protection, method and , the efficient effect of the method

Inactive Publication Date: 2022-02-08
JIANGSU AISEN SEMICON MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It discloses a method for preparing electroplating-grade copper sulfate. The prepared copper sulfate crystals are delicate, with low water content and high purity, which can reach more than 99.9%. The preparation method is relatively long and complicated

Method used

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  • Copper sulfate pentahydrate crystal and preparation method thereof
  • Copper sulfate pentahydrate crystal and preparation method thereof
  • Copper sulfate pentahydrate crystal and preparation method thereof

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0069] The present embodiment provides a kind of preparation method of copper sulfate crystal, and the structural schematic diagram of electrolyzer and electrodialyzer are respectively as follows figure 1 and figure 2 Shown, described preparation method comprises the steps:

[0070] (1) Before electrolysis, insert degreasing, deoxidized and cleaned electrolytic copper plate and 316L stainless steel plate as anode 1 and cathode 2 in electrolyzer and electrodialyzer respectively;

[0071] (2) Two unidirectional ionic membranes 3 are arranged in the electrolytic cell. The unidirectional cation membrane near the anode side only allows cations to pass through, and the unidirectional anion membrane near the cathode side only allows anion to pass through. The two unidirectional ion membranes The electrolytic cell is divided into a first compartment 4 of the electrolytic cell, a second compartment 5 of the electrolytic cell and a third compartment 6 of the electrolytic cell;

[007...

Embodiment 2

[0079] The present embodiment provides a kind of preparation method of copper sulfate crystal, and described preparation method comprises the steps:

[0080] (1) Before electrolysis, insert degreasing, deoxidized and cleaned electrolytic copper plates and high-purity titanium plates as anodes and cathodes respectively in the electrolyzer and electrodialyzer;

[0081] (2) Two unidirectional ionic membranes are set in the electrolytic cell. The unidirectional cation membrane near the anode only allows cations to pass through, and the unidirectional anion membrane near the cathode side only allows anions to pass through. The two unidirectional ionic membranes will The electrolytic cell is divided into a first compartment of the electrolytic cell, a second compartment of the electrolytic cell and a third compartment of the electrolytic cell;

[0082] 5 electrolytic units are connected in parallel, inject sulfuric acid aqueous solution with a mass concentration of 10% into each com...

Embodiment 3

[0089] The present embodiment provides a kind of preparation method of copper sulfate crystal, and described preparation method comprises the steps:

[0090] (1) Before electrolysis, insert degreasing and deoxidized and cleaned electrolytic copper plates and 316L stainless steel plates as anodes and cathodes respectively in the electrolyzer and electrodialyzer;

[0091] (2) Two unidirectional ionic membranes 3 are set in the electrolytic cell. The unidirectional cation membrane near the anode side only allows cations to pass through, and the unidirectional anion membrane near the cathode side only allows anion to pass through. The two unidirectional ion membranes The membrane divides the cell into the first compartment of the cell, the second compartment of the cell and the third compartment of the cell;

[0092] 10 electrolytic units are connected in parallel, inject sulfuric acid aqueous solution with a mass concentration of 6% into each compartment of the electrolytic cell,...

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Abstract

The invention relates to a copper sulfate pentahydrate crystal and a preparation method thereof. The preparation method comprises the following steps of: 1, arranging a one-way ionic membrane only allowing positive ions to pass through on the side, close to an anode, in an electrolytic bath, and arranging a one-way ionic membrane only allowing negative ions to pass through on the side, close to a cathode, in the electrolytic bath; adding a sulfuric acid aqueous solution into the electrolytic bath, and electrifying for electrolyzing by taking an electrolytic copper plate as an anode to obtain a copper sulfate solution; 2, alternately arranging at least one group of cationic membranes and anionic membranes in an electrodialyzer, the cationic membranes being adjacent to the anode, and the anionic membranes being adjacent to the cathode; introducing the copper sulfate solution in the step 1 into an electrodialyzer, and electrifying for electrodialysis to obtain a further purified copper sulfate solution; and 3, carrying out evaporation, concentration and crystallization treatment on the copper sulfate solution obtained in the step 2, and centrifuging to obtain the copper sulfate pentahydrate crystal. The preparation method is simple in process, and the prepared copper sulfate crystal is high in purity and stable in quality.

Description

technical field [0001] The invention relates to the technical field of copper sulfate crystal preparation, in particular to a copper sulfate pentahydrate crystal and a preparation method thereof, in particular to a copper sulfate pentahydrate crystal and a method for producing copper sulfate pentahydrate crystal through electrolysis-electrodialysis coupling. Background technique [0002] Copper sulfate is the main raw material in electroplating copper, electroplating copper alloy, electroless copper plating and electroless copper alloy plating. The electroplating copper process is widely used in PCB electroplating and wafer electroplating processes, and is one of the essential process steps. The manufacture method of the high-purity copper sulfate crystal is very important and meaningful. [0003] The current method of producing copper sulfate crystals is a common chemical method. This method uses high-purity copper, high-purity sulfuric acid and hydrogen peroxide as raw m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/01C25B9/23C01G3/00C01G3/10
CPCC25B1/01C25B9/23C01G3/10C01G3/003C01P2006/80
Inventor 陈春张兵向文胜赵建龙
Owner JIANGSU AISEN SEMICON MATERIAL CO LTD
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