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Production process of zironium hydroxide

A technology of zirconium hydroxide and production process, which is applied in the direction of inorganic chemistry, zirconium compounds, chemical instruments and methods, etc., and can solve problems such as large water consumption, low content of zirconium dioxide, and environmental pollution

Inactive Publication Date: 2004-08-04
柳云珍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The product of this process has low zirconia content, large water consumption, produces a large amount of waste water that is difficult to treat, and is directly discharged to pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] ①Using zirconium oxychloride as the raw material of the strong salt of zirconium, and ammonia water as the raw material of the alkali metal hydroxide. ② Mix zirconium oxychloride and ammonia water in a molar ratio of 1:2. ③Completely mix and grind zirconium oxychloride and ammonia water to make them fully react. ④ Mix the reaction product with pure water in a weight ratio of 2:1. ⑤ Separating the mixed slurry from solid to liquid. ⑥Precisely filter the separated liquid to remove suspended impurities, then concentrate and crystallize to produce by-product ammonium chloride. ⑦The solid part continues to be washed with water in the above-mentioned manner, and the lotion is applied mechanically until the chloride meets the product standard requirements, and the solid is zirconium hydroxide. The obtained zirconium hydroxide can be calcined at about 550°C for 4 hours to obtain zirconium dioxide.

Embodiment 2

[0014] ① Zirconium oxychloride is used as the raw material of zirconium strong salt, and sodium hydroxide is used as the raw material of alkali metal hydroxide. ② Mix zirconium oxychloride and sodium hydroxide in a molar ratio of 1:2. ③Completely mix and grind zirconium oxychloride and sodium hydroxide to make them fully react. ④ Mix the reaction product with pure water in a ratio of 1:1 by weight. ⑤ Separating the mixed slurry from solid to liquid. ⑥Precisely filter the separated liquid to remove suspended impurities, then concentrate and crystallize to produce by-product sodium chloride. ⑦The solid part continues to be washed with water according to the above method, and the lotion is applied mechanically until the chloride meets the product standard requirements (about 5 times), and the solid is zirconium hydroxide. The obtained zirconium hydroxide can be calcined at about 500°C for 4 hours to obtain zirconium dioxide.

Embodiment 3

[0016] ① Basic zirconium sulfate is used as the raw material for the strong salt of zirconium, and ammonia water is used as the raw material for the alkali metal hydroxide. ② Mix basic zirconium sulfate and ammonia water in a molar ratio of 1:2. ③ Fully mix and grind basic zirconium sulfate and ammonia water to make them fully react. ④ Mix the reaction product with pure water in a ratio of 2:1 by weight. ⑤ Separating the mixed slurry from solid to liquid. ⑥Precisely filter the separated liquid to remove suspended impurities, then concentrate and crystallize to produce by-product ammonium sulfate. ⑦The solid part continues to be washed with water according to the above method, and the lotion is applied until the sulfide meets the product standard requirements, and the solid is zirconium hydroxide. The obtained zirconium hydroxide can be calcined at about 550°C for 4 hours to obtain zirconium dioxide.

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PUM

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Abstract

A solid process for preparing zirconium hydroxide includes mixing the zirconium salt of strong acid with the alkali metal (or alkali-earth metal) hydroxide, stirring, grinding, water washing and dewatering. Its advantages are high yield and no environmental pollution.

Description

technical field [0001] The invention provides a production process of zirconium hydroxide, which is used to directly produce zirconium hydroxide by using strong salt of zirconium, hydroxide of alkali metal or ammonia water as raw materials, and belongs to the technical field of inorganic chemical industry. Background technique [0002] The traditional production process of zirconium hydroxide usually uses zirconium oxychloride as raw material to make a solution with a certain concentration, and then adds a certain amount of ammonia water to neutralize to form zirconium hydroxide, which is washed with water and centrifuged to obtain the finished product. The product of this process has low zirconium dioxide content, large water consumption, produces a large amount of waste water that is difficult to treat, and is directly discharged to pollute the environment. Contents of the invention [0003] The purpose of the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G25/00
Inventor 宋世楼柳云珍贾欲雪
Owner 柳云珍