Method for preparing high-purity superfine zinc sulfide

A zinc sulfide, high-purity technology, applied in the direction of zinc sulfide, can solve the problems of high equipment cost, complicated process control, and no practical application examples, and achieve the effects of production cost control, environmental pollution avoidance, and zero pollution discharge

Inactive Publication Date: 2010-01-13
黄石市高纯化工技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

A variety of preparation methods have appeared successively, such as direct elemental chemical method, microemulsion method, hydrothermal method, solvothermal synthesis, etc., but these methods a

Method used

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  • Method for preparing high-purity superfine zinc sulfide

Examples

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Comparison scheme
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Example Embodiment

[0019] Example 1: Take 40kg of zinc acetate with a content of 99.90% and 5kg of ammonium sulfide with a content of 99.90% in solid phase synthesis at room temperature, the synthesis pressure is -0.1~0.1MPa, the time is 1-24 hours, and the pH of the synthesis system is 4 8. After the reaction is completed, vacuum drying is carried out at -0.1~0.1MPa, 0-70℃, ammonium acetate (content>80%) is condensed and recovered. The dried product is zinc sulfide with a particle size of 50-200nm. The rate is 97%-100%.

Example Embodiment

[0020] Example 2: Take 30kg of zinc formate with a content of 99.00% and 8kg of ammonium sulfide with a content of 99.00% in solid phase synthesis at room temperature, the synthesis pressure is -0.1~0.1MPa, the time is 1-24 hours, and the pH of the synthesis system is 4 8. After the reaction is completed, vacuum dry at -0.1~0.1MPa, 0-70℃, and ammonium formate (content>80%) will be recovered after condensation. The dried product is zinc sulfide with a particle size of 50-200nm. The rate is 98%-100%.

Example Embodiment

[0021] Example 3: Take 35kg of 99.50% zinc chloride and 10kg of 99.50% ammonium sulfide in solid phase synthesis at room temperature, synthesis pressure -0.1~0.1MPa, time 1-24 hours, and pH 4 in the synthesis system -8. After the reaction is completed, vacuum dry at -0.1~0.1MPa, 0-70℃, ammonium chloride (content>80%) is condensed and recovered, and the dried product is zinc sulfide with a particle size of 50-200nm , The yield is 95%-100%.

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Abstract

The invention provides a method for preparing high-purity superfine zinc sulfide, which is characterized in that: the solid-phase synthesis of a high-purity organic zinc compound and high-purity ammonium sulfide is made at room temperature, the synthesis pressure is between- 0.1 and 0.1MPa, the synthesis time is between 1 and 24 hours, and the pH value is between 4 and 8, wherein the weight portion ratio of the high-purity organic zinc compound to the high-purity ammonium sulfide is between 3 and 4:0.5 and 1.0; after the solid phase synthesis, the reaction products are vacuum-dried at a temperature of between 0 and 70 DEG C and at a pressure of -0.1 and 0.1MPa to obtain the finished product. The method has the advantages of convenient operation, simple process and little pollution; moreover, under a condition of not introducing any other dispersants, the aim of producing superfine zinc sulfide particles under natural conditions can be achieved.

Description

(1) Technical field: [0001] The invention belongs to the field of chemical industry, in particular to a preparation method of high-purity ultrafine zinc sulfide. (two) background technology: [0002] The traditional method of producing zinc sulfide is mainly prepared by liquid phase precipitation method. The liquid phase precipitation method uses zinc sulfate as the zinc source, injects hydrogen sulfide gas into it, and prepares it under certain acidity, temperature and pressure conditions. ZnSO 4 +H 2 S=ZnS+H 2 SO 4 , due to the high solubility of zinc sulfide in sulfuric acid solution, some zinc sulfide particles are in a metastable colloidal state, resulting in very difficult washing of zinc sulfide, and its conversion rate is only close to 50%. Moreover, zinc sulfide is severely agglomerated after drying, resulting in coarse and uneven particle sizes of the product zinc sulfide. At the same time, due to the high toxicity of hydrogen sulfide gas, there is a huge poten...

Claims

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Application Information

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IPC IPC(8): C01G9/08
Inventor 刘建平
Owner 黄石市高纯化工技术有限公司
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