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Extracting agent for removing impurity phosphorus contained in fluosilicic acid and application method thereof

An extractant and a technology of fluorosilicic acid, which are applied to an extractant for removing impurity phosphorus in fluorosilicic acid and its application field, can solve problems such as lack of phosphorus removal technology, and achieve the effects of low cost, improved yield and simple treatment process.

Inactive Publication Date: 2011-10-19
INST OF SOIL SCI CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, P in fluosilicic acid processed from fluorite and phosphate rock 2 o 5 The content is relatively high, but the phosphorus removal technology from fluosilicic acid is relatively poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] According to volume percentage, n-butanol accounts for 5%, trioctyl phosphate accounts for 90%, isononane accounts for 5%, and is stirred and mixed to prepare an extractant. The extractant is used in Henan Jiaozuo Duofluoride Chemical Co., Ltd. Fluorosilicate Mother Liquor (P 2 o 5 ≤4%), 4 parts of extractant and 1 part of mother liquor were mixed and stirred for 1 min, after three-stage extraction, standing and layering, collecting the mother liquor in the lower layer to obtain fluosilicic acid solution (P 2 o 5 content≤0.15%).

Embodiment 2

[0016] By volume percentage, isoamyl alcohol accounts for 60%, isopropyl phosphonic acid bis(1-methylheptyl) ester accounts for 24%, and n-octane accounts for 15%. Stir and mix to prepare an extractant. The extractant is used in Henan Jiaozuo Duofluoride Chemical Co., Ltd. Fluorosilicate Mother Liquor (P 2 o 5 ≤4%), 3.5 parts of extractant and 1 part of mother liquor were mixed and stirred for 1 min, after three-stage extraction, standing and layering, collecting the mother liquor in the lower layer to obtain fluosilicic acid solution (P 2 o 5 content≤0.15%).

Embodiment 3

[0018] By volume percentage, n-hexanol accounts for 65%, isopropyl phosphonic acid bis(2-ethylhexyl) ester accounts for 20%, and n-heptane accounts for 15%. Stir and mix to prepare an extractant. The extractant is used in Henan Jiaozuo Duofluoride Chemical Co., Ltd. Fluorosilicate Mother Liquor (P 2 o 5 ≤4%), 3.5 parts of extractant and 1 part of mother liquor were mixed and stirred for 1 min, after three-stage extraction, standing and layering, collecting the mother liquor in the lower layer to obtain fluosilicic acid solution (P 2 o 5 content≤0.15%).

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PUM

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Abstract

The invention relates to an extracting agent for removing impurity phosphorus contained in a fluosilicic acid, which is an organic solvent. The organic solvent is a mixture of fatty alcohol, organic phosphate and phosphonate or any one ester of the organic phosphate and the phosphonate, which adds the fatty alcohol and alkane, wherein the volume percentage of the alkane is not more than 50 percent in the mixture. A method for removing the impurity phosphorus contained in the fluosilicic acid comprises the following steps of: mixing the extracting agent and fluosilicic acid mother liquid in the volume ratio of 1:1 to 1:5, and sufficiently and uniformly stirring; standing and layering an extraction system, wherein the phosphorus enters an upper organic solvent, and lower solution clear liquid is the fluosilicic acid mother liquid the impurity phosphorus of is removed; and extracting the extracting agent and the fluosilicic acid mother liquid 2-5 times and then obtaining the fluosilicic acid. The invention prepares the extracting agent by mixing one or more than two solvents of the fatty alcohol, organic phosphate, the phosphonate and the alkane, can extract the impurity phosphorus contained in the fluosilicic acid by sufficiently stirring the extracting agent with a fluosilicic acid solution and has simple processing process and low cost.

Description

1. Technical field [0001] The invention relates to an extractant for removing impurity phosphorus in fluosilicic acid and a method for removing impurity phosphorus by using the extractant. 2. Background technology [0002] At present, fluorspar and phosphate rock in mineral deposits are the main resources for processing and preparing fluosilicic acid. High-quality fluorite has high fluorine content, P 2 o 5 The content is very low, but its reserves are very small. Phosphorus-associated fluorine ore resources are abundant and have great mining potential. Fluosilicic acid has a wide range of technical applications, and can be used to prepare sodium fluorosilicate, potassium, ammonium, magnesium, copper, barium, lead and other fluorosilicates and fluoride salts, such as sodium fluoride, potassium fluoride, fluoride Aluminum chloride, ammonium fluoride, etc. can also be used as raw materials for the preparation of anhydrous hydrogen fluoride, silicon tetrafluoride and silico...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/10
Inventor 刘云董元华孙含元李志敏耿治干
Owner INST OF SOIL SCI CHINESE ACAD OF SCI