Method for refining nickel sulfate

A technology of nickel sulfate and nickel soap, which is applied to the preparation of nickel sulfate and nickel compounds, can solve the problems of high labor intensity, unreachable yield of refined products, and quality that does not meet the requirements of chemical reagent grades, etc., to achieve increased yield, Reduce the intensity of labor and avoid the effect of polluting the environment

Inactive Publication Date: 2018-11-06
贵州中伟资源循环产业发展有限公司
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Problems solved by technology

This method is labor-intensive, and hydrogen sulfide pollutes the environment, and at the same time, part of the Ni will be taken away due to the precipitation of hydroxides and sulfides produced. 2+ , thereby affecting t

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Embodiment Construction

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] Based on the technical problems that the background technology exists, the present invention provides a kind of technical scheme: a kind of method for refining nickel sulfate, specifically comprises the steps:

[0024] Step 1, dissolving and oxidation of thick nickel sulfate: first thick nickel sulfate is dissolved in water, makes solution contain Ni 2+ The amount reaches 65-75g / L, blows air into it to oxidize and stir, and heats the solution to reach 80-85°C. If it is not convenient to obtain compressed air or want to speed up t...

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Abstract

The invention discloses a method for refining nickel sulfate. The method specifically comprises the following steps: step 1, dissolving and oxidizing crude nickle sulphate; step 2, preparing a nickelsoap; step 3, extracting and removing iron; step 4, extracting and removing copper; step 5, extracting and removing zinc; step 6, removing organic impurities; and step 7, carrying out a series of steps in a post treatment process. According to the method for refining nickel sulfate, provided by the invention, a tradition method for refining nickel sulfate is changed, the labor intensity is lowered, that environment is polluted by hydrogen sulfide can be well avoided, and that part of Ni2+ is carried away due to hydroxide and sulfide precipitation produced can be prevented, and further the purification yield is increased greatly, and is increased to 95 percent from the 85 percent in the previous. Therefore, the yield of refined products meets market requirements, and the quality also meetschemical reagent grade requirements.

Description

technical field [0001] The invention relates to the technical field of nickel sulfate preparation, in particular to a method for refining nickel sulfate. Background technique [0002] Nickel sulfate has three types: anhydrous, hexahydrate and heptahydrate. Most of the commodities are hexahydrate, and there are two variants of α-type and β-type. The former is a blue tetragonal crystal, and the latter is a green monoclinic crystal. It loses six waters of crystallization when heated to 103°C. Soluble in water, slightly soluble in ethanol, methanol, its aqueous solution is acidic, slightly soluble in acid, ammonia, poisonous. Mainly used in the electroplating industry, it is the main nickel salt of electroplating nickel and chemical nickel, and is also the source of metal nickel ions. It can dissociate nickel ions and sulfate ions during the electroplating process. [0003] Crude nickel sulfate contains impurities such as iron, arsenic, antimony, copper, lead, zinc and free s...

Claims

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Application Information

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IPC IPC(8): C01G53/10
CPCC01G53/003C01G53/10C01P2006/80
Inventor 陈军訚硕邓伟明
Owner 贵州中伟资源循环产业发展有限公司
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