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Method for removing impurities in phosphoric acid and deposition purificant used in the method

A purifying agent and impurity technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve problems such as unsatisfactory effect and difficult sediment filtration and separation, and achieve the effect of easy mechanization, high product purity and good filtration performance.

Inactive Publication Date: 2008-04-23
刘天旸 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this precipitating agent has certain precipitating effect, its effect is still not very ideal. It is used for precipitation purification, and the purity of its product can only barely reach 97%, and it is difficult to filter and separate the sediment during the production process. Efficiency can only reach 50% to 70% of equipment capacity

Method used

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  • Method for removing impurities in phosphoric acid and deposition purificant used in the method
  • Method for removing impurities in phosphoric acid and deposition purificant used in the method
  • Method for removing impurities in phosphoric acid and deposition purificant used in the method

Examples

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Embodiment 1

[0019] Embodiment 1: To manufacture 100 kilograms of precipitation purifiers for removing impurities contained in phosphoric acid and ammonium phosphate products, the components in the following formula are mixed uniformly according to the amount.

[0020]

Embodiment 2

[0021] Embodiment 2: To manufacture 100 kilograms of precipitation purifying agent for removing impurities contained in phosphoric acid and ammonium phosphate products, the components in the following formula are mixed uniformly according to the amount.

[0022]

Embodiment 3

[0023] Embodiment 3: the method for removing phosphoric acid impurity.

[0024] Such as figure 1 As shown, phosphoric acid is placed in the precipitation purification device, and the precipitation purification agent of the above-mentioned embodiment 1 or 2 is added in a proportion of 1% to 5%, and it is left to stand for 12 to 24 hours, and then the sediment in the slurry is removed by a high-speed centrifuge Separated from the solution, the resulting precipitate can be used as a compound fertilizer. The resulting solution is placed in an exchange tower and refined with an ion exchange resin. After treatment, refined phosphoric acid with high purity is obtained.

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Abstract

The invention discloses a method for removing impurity substance from phosphoric acid and the precipitating and cleansing agent used by the method, the precipitation accelerating agent of the precipitating and cleansing agent contains the soluble inorganic salts and saturated resin of calcium and barium, its high polymer coagulant contains at least one of polycellulose ether and polyacrylamide, and its filter aiding agent contains several kinds of inorganic porous members and copolymer synthetic resin with microporous and porous structures.

Description

technical field [0001] The invention relates to the technical field of phosphate fertilizer production, in particular to a method for removing impurities contained in phosphoric acid or ammonium phosphate fertilizer using phosphoric acid as raw material and a precipitation purifier used in the method. Background technique [0002] The main raw material for the manufacture of ammonium phosphate is phosphoric acid. Phosphoric acid is converted from phosphate rock. Phosphoric acid can be divided into dry process phosphoric acid and wet process phosphoric acid according to its preparation method. The production of dry-process phosphoric acid is mainly through high-temperature decomposition of phosphate rock in an electric furnace to sublimate phosphorus, which is collected to obtain sublimated phosphorus, that is, yellow phosphorus with extremely high purity, and then use it to produce phosphoric acid. This phosphoric acid is phosphoric acid with very few impurities and extreme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/56
Inventor 刘天暘
Owner 刘天旸
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