Barium metaphosphorate production process

A production process and a barium metaphosphate technology are applied in the production process field of barium metaphosphate, can solve the problems of unstable product quality, complicated production process and high production cost, and achieve the advantages of compact structure of process equipment, simple production process and low cost. Effect

Inactive Publication Date: 2006-07-12
SHANXI SUPERNEW METAL MATERIAL
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Problems solved by technology

[0003] The object of the present invention is to provide a kind of production technique of barium metaphosphate, which solves the technical problems of complicated production technique, high production cost and unstable product quality in the background art

Method used

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Embodiment Construction

[0019] Production technology principle of the present invention is as follows:

[0020] 1. After the barium hydroxide is made by recrystallization method, the impurity iron, copper, nickel, manganese and cobalt in the barium hydroxide are all less than 0.0003%;

[0021] 2. React with GR grade phosphoric acid to generate barium hydrogen phosphate, the chemical reaction formula is as follows:

[0022]

[0023] 3. Add deionized water to the barium hydrogen phosphate to make a mixed solution with a solid content of 35% to 40%, and then centrifugally spray dry to make barium metaphosphate.

[0024] Concrete production technique of the present invention is as follows:

[0025] 1. Take barium hydroxide and place it in a stainless steel reaction vessel, add deionized water and 0.01% activated carbon, stir, heat at 100-120°C to fully dissolve it until the specific gravity is 1.05-1.10, and let it stand for 16 hours or more. Filtrate, control iron, copper, nickel, manganese, an...

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Abstract

The invention discloses a manufacturing technology of barium metaphosphate, which comprises the following steps: putting barium hydroxide in the container; adding the deionized water and active carbon to stir and heat with 1.05-1.10 specific gravity until the barium hydroxide is dissolved completely; stewing; filtering; obtaining fine barium hydroxide with iron, bronze, nickel, manganese and cobalt less than 0.0003 percent; putting the barium hydroxide in another container to stir and add high-quality phosphate; adjusting the pH value at 9-11 to obtain the deposition of barium hydrophosphate; adding the deionized water to dilute; obtaining the mixing paste of barium hydrophosphate; drying and condensing into barium metaphosphate by centrifugal spray. The technology is easy to adjust and control, whose production impurity content is low and recovery rate is high.

Description

technical field [0001] The invention relates to a production process of barium metaphosphate, in particular to a production process of barium metaphosphate with low impurity content for flame retardant and phosphate optical glass additive. Background technique [0002] At present, the production method of barium metaphosphate is mainly to use the mixture of barium hydrogen phosphate and barium carbonate to calcinate at high temperature for 15 hours to make barium metaphosphate. Another method is to react barium peroxide with phosphoric acid to generate barium phosphate precipitate, and heat the barium phosphate precipitate to convert it into barium metaphosphate. The common defects of these two methods are that the production cost is high, the yield is unstable, there are intermediates in the product, the product quality is unstable, and the production process is complicated. Contents of the invention [0003] The object of the present invention is to provide a kind of pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/44
Inventor 邱志明邱雯刘明钢
Owner SHANXI SUPERNEW METAL MATERIAL
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