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Method for preparing transition element hydroxide by using calcium hydroxide

A transition element, calcium hydroxide technology, applied in the directions of nickel oxide/nickel hydroxide, zinc oxide/zinc hydroxide, copper oxide/copper hydroxide, etc., can solve problems such as difficult and effective separation, and achieve high separation efficiency and process. Simple, inhibits the effect of spontaneous nucleation

Inactive Publication Date: 2013-04-03
TIANJIN SEA WATER DESALINATION & COMPLEX UTILIZATION INST STATE OCEANOGRAPHI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the transition element hydroxide and co-produced calcium sulfate obtained by this method are all solid, and it is difficult to effectively separate them by traditional methods

Method used

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  • Method for preparing transition element hydroxide by using calcium hydroxide
  • Method for preparing transition element hydroxide by using calcium hydroxide
  • Method for preparing transition element hydroxide by using calcium hydroxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Preparation of cobalt hydroxide

[0025] Take cobalt sulfate solution and calcium hydroxide solution and analyze the composition of cobalt sulfate solution as: SO 4 2- 0.62mol / L, Co 2+ 0.62mol / L; the composition of calcium hydroxide solution: Ca 2+ 1.20mol / L, OH - 2.40mol / L.

[0026] The cobalt sulfate solution and the calcium hydroxide solution were continuously fed into the crystallization reactor simultaneously from the transition element sulfate solution inlet 10 and the calcium hydroxide solution inlet 11 respectively, and the feed ratio was the cobalt ion Co in the cobalt sulfate solution. 2+ With hydroxide ion OH in calcium hydroxide solution - The molar ratio is 1:2, and the feed rates of cobalt sulfate solution and calcium hydroxide solution are 3.3L / h and 1.71L / h, respectively. When the feed liquid level in the crystallizer exceeds the upper mouth of the circulating lifting device 6, the circulating lifting device 6 is turned on. The circulating liquid l...

Embodiment 2

[0031] Example 2: Preparation of nickel hydroxide

[0032] Take nickel sulfate solution and calcium hydroxide solution, and analyze the composition of nickel sulfate solution as: SO 4 2- 0.83mol / L, Ni 2+ 0.83mol / L; the composition of calcium hydroxide solution: Ca 2+ 1.50mol / L, OH - 3.00mol / L.

[0033] The nickel sulfate solution and the calcium hydroxide solution were continuously fed into the crystallization reactor simultaneously from the transition element sulfate solution inlet 10 and the calcium hydroxide solution inlet 11 respectively, and the feed ratio was the nickel ion Ni in the nickel sulfate solution. 2+ With hydroxide ion OH in calcium hydroxide solution - The molar ratio is 1:3, and the feed rates of nickel sulfate solution and calcium hydroxide solution are 1.40L / h and 1.17L / h, respectively. When the feed liquid level in the crystallizer exceeds the upper mouth of the circulating lifting device 6, the circulating lifting device 6 is turned on. The circulating liqui...

Embodiment 3

[0038] Example 3: Preparation of copper hydroxide

[0039] Take copper sulfate solution and calcium hydroxide solution, analyze the composition of copper sulfate solution as: SO 4 2- 0.96mol / L, Cu 2+ 0.96mol / L; the composition of calcium hydroxide solution: Ca 2+ 1.98mol / L, OH - 3.96mol / L.

[0040] The copper sulfate solution and the calcium hydroxide solution were continuously fed into the crystallization reactor simultaneously from the transition element sulfate solution inlet 10 and the calcium hydroxide solution inlet 11 respectively, and the feed ratio was copper ion Cu in the copper sulfate solution. 2+ With hydroxide ion OH in calcium hydroxide solution - The molar ratio is 1:4, and the feed rates of copper sulfate solution and calcium hydroxide solution are 2.48L / h and 2.40L / h, respectively. When the feed liquid level in the crystallizer exceeds the upper mouth of the circulating lifting device 6, the circulating lifting device 6 is turned on. The circulating liquid liftin...

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Abstract

The invention discloses a method for preparing a transition element hydroxide by using calcium hydroxide. According to the method, two solutions are continuously mixed to react in a crystallization reactor, and in the process of hybrid reaction, through controlling the flows of a transition element sulfate solution and a circulating solution of a circulating lifting device in the reactor, sulfate ions and calcium ions form calcium sulphate crystals with large particle sizes and the crystals subside to the kettle bottom of the crystallization reactor; transition element ions are combined with hydroxy radicals so as to generate transition element hydroxides with small particle sizes, and the transition element hydroxides overflow through an upper overflow tank by using the circulating lifting device, thereby separating the transition element hydroxides from calcium sulfate. The prepared transition element hydroxides comprise cobalt hydroxide, nickel hydroxide, copper hydroxide and zinc hydroxide. The method for preparing transition element hydroxides has the advantages of low cost, simpleness in process, and high conversion rate of transition element ions, and the like, therefore, the method has a broad application prospect.

Description

Technical field [0001] The invention relates to a preparation method of transition element hydroxide in the field of inorganic chemical industry, in particular to the preparation of cobalt hydroxide, nickel hydroxide and copper hydroxide by using calcium hydroxide solution, cobalt sulfate solution, nickel sulfate solution, copper sulfate solution and zinc sulfate solution , Zinc hydroxide method. Background technique [0002] The transition elements cobalt, nickel, copper and zinc are important metal elements, mainly found in ore. At present, the extraction of these elements from the ore adopts atmospheric acid immersion smelting technology, that is, the ore is first dissolved in sulfuric acid, and then the corresponding transition element sulfate solution is obtained through stepwise purification and separation, and the transition element sulfate is obtained by evaporating this solution. So as to achieve the separation of transition elements in the ore. [0003] Evaporating tran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/46C01G51/04C01G53/04C01G3/02C01G9/02
Inventor 张琦王俐聪王涛骆碧君陆永超武海虹马来波吴丹黄西平
Owner TIANJIN SEA WATER DESALINATION & COMPLEX UTILIZATION INST STATE OCEANOGRAPHI
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