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Wet method purification method for phosphate or soluble phosphate

A wet-process phosphoric acid, soluble technology, applied in the direction of phosphate, chemical instruments and methods, phosphorus compounds, etc., can solve the problem of low impurity removal rate, achieve easy recovery and reusability, rich solvent sources, and obvious economic benefits Effect

Inactive Publication Date: 2006-04-26
武汉天衣集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the impurity removal rate is generally not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 4.1491 g of triethanolamine stearate to a flat-bottomed flask containing 50 ml of ethylbenzene, measure 5 ml of methanol and add it to the bottle, then add 25 ml of wet-process phosphoric acid, put it into a stirring bar, stir it electromagnetically for 2 hours, and let it stand for 30 minutes Layer, separated to obtain the purified phosphoric acid in the lower layer.

Embodiment 2

[0025] Add 0.7762g of Tween-60 to a flat-bottomed flask filled with 10ml of ethylbenzene, measure 5ml of absolute ethanol and add it to the bottle, then add 20ml of wet-process phosphoric acid, put it into a stirring bar, and stir it electromagnetically for 2 hours to obtain a milky white mixture ; Stand for 90 minutes to separate the layers, and separate the liquid to obtain the purified phosphoric acid in the lower layer.

Embodiment 3

[0027] Add 2.3284g of stearic acid in a flat-bottomed flask filled with 20ml of ethylbenzene, add 5ml of isopropanol, measure 20ml of wet-process phosphoric acid and add it to the bottle, put it into a stirring bar, and stir it electromagnetically for 2 hours to obtain a milky white mixture; Set aside for 30 minutes to separate the layers to obtain the purified phosphoric acid in the lower layer.

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PUM

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Abstract

The present invention relates to the purification process of wet process phosphorous acid or soluble phosphate. The purification process includes the following steps: 1. compounding emulsion via adding surfactant in certain amount into organic solvent; 2. compounding solution via adding interface dissolution process promoter in certain amount to the emulsion; 3. preparing emulsion via adding water solution of wet process phosphorous acid or soluble phosphate in certain amount to the solution, mixing and stirring; and 4. stirring the emulsion, letting stand to laminate, and separating liquid to obtain lower layer of purified wet process phosphorous acid or soluble phosphate. The said process can eliminate various kinds of high valence metal cations from wet process phosphorous acid or soluble phosphate in fast speed and low cost.

Description

technical field [0001] The invention belongs to the field of chemical product production, and in particular relates to a method for purifying wet-process phosphoric acid or soluble phosphate produced by using wet-process phosphoric acid as a raw material. Background technique [0002] The final use of phosphoric acid depends on its purity. Wet-process phosphoric acid is produced from natural phosphate rock, so it contains a variety of impurity ions in addition to phosphoric acid. For this reason, wet-process phosphoric acid has never been used as a raw material for some industrial production (such as the food industry and electronic material industry that must use high-purity phosphoric acid), but can only be used as a fertilizer raw material. Wet-process phosphoric acid generally contains 0.3-0.5% of CaO, 1.18% of MgO, Al 2 o 3 0.26%, Fe 0.27%, in addition to SiO 2 , F - , SO 4 2- How to purify the produced products has become a hot issue in the phosphate chemical in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/234C01B25/26
Inventor 陈金芳陈启明徐旺生郭佳宋少男李金玲张良均
Owner 武汉天衣集团有限公司
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