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Method for preparing flame retardant with phosphate rock

A technology of flame retardant and phosphate rock, which is applied in the fields of chemical industry and preparation of flame retardants from phosphate rock, can solve the problems of increasing the consumption of phosphoric acid and increasing the preparation cost of phosphorus and nitrogen flame retardants, and achieve the effect of reducing the preparation cost

Inactive Publication Date: 2014-04-16
贵州合众拓源磷资源综合利用技术股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At the same time, the preparation of phosphorus-nitrogen flame retardants with increasing demand is based on high-purity phosphoric acid as one of the raw materials, which undoubtedly further increases the consumption of phosphoric acid and increases the cost of phosphorus-nitrogen flame retardants. preparation cost
However, there are no relevant reports on the technology of directly synthesizing phosphorus-nitrogen composite flame retardants with medium and low-grade phosphate rock as the initial raw material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh P 2 o 5 Put 100g of phosphate rock powder with a content of 17.6wt% into 250g of a hydrochloric acid solution with a concentration of 37wt%, and stir the reaction at 35°C for 3h, add 10g of a sodium nitrate solution with a concentration of 25wt%, stir for another 1h, let stand, and separate layers Get the phosphorus-containing leaching solution in the upper layer, P 2 o 5 The leaching rate is 99.63%;

[0028] Add a sodium hydroxide solution with a concentration of 10wt% into the phosphorus-containing leaching solution in a stirring state until the pH value of the phosphorus-containing leaching solution is 1.5, stop adding the sodium hydroxide solution, continue stirring for 0.5h, and then filter to obtain filtrate A;

[0029] At a temperature of 20°C and stirring, 20 g of sodium citrate solution with a concentration of 15 wt % was added to filtrate A, and after stirring for 0.5 h, 62 g of melamine was added, and a shear emulsifier was used for dispersion reacti...

Embodiment 2

[0033] Weigh P 2 o 5 Put 100g of phosphate rock powder with a content of 17.6wt% into 300g of a hydrochloric acid solution with a concentration of 20wt%, and stir and react at 50°C for 3h, add 10g of a sodium chloride solution with a concentration of 20wt%, stir for another 0.5h, and let stand. Layered to get the phosphorus-containing leachate in the upper layer, P 2 o 5 The leaching rate is 99.33%;

[0034] Add ammonium bicarbonate solution with a concentration of 10wt% into the phosphorus-containing leaching solution under stirring until the pH value of the phosphorus-containing leaching solution is 2.0, stop adding the ammonium bicarbonate solution, continue stirring for 1 hour, and then filter to obtain filtrate A;

[0035] At a temperature of 40°C and stirring, add 60g of 5wt% disodium ethylenediaminetetraacetic acid solution to filtrate A, stir for 1 hour, add 40 grams of melamine, use a shear emulsifier for dispersion reaction for 2 hours, and filter Obtain filter r...

Embodiment 3

[0039] Weigh P 2 o 5 100g of phosphate rock powder with a content of 17.6wt% was put into 400g of a hydrochloric acid solution with a concentration of 15wt%, and stirred and reacted at 90°C for 4h, and 16g of a potassium chloride solution with a concentration of 24wt% was added, stirred for another 1.5h, and left to stand. Layered to get the phosphorus-containing leachate in the upper layer, P 2 o 5 The leaching rate is 99.78%;

[0040] Add a lime emulsion with a concentration of 10wt% into the phosphorus-containing leaching solution under stirring until the pH value of the phosphorus-containing leaching solution is 2.0, stop adding the lime emulsion, continue stirring for 1.5 hours, and then filter to obtain filtrate A;

[0041] At a temperature of 50°C and stirring, 25 g of sodium tartrate solution with a concentration of 20 wt % was added to filtrate A, and after stirring for 0.7 h, 90 g of melamine was added, and a shear emulsifier was used for dispersion reaction for 0...

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Abstract

The invention discloses a method for preparing flame retardant with phosphate rock. According to the invention, phosphate rock, particularly phosphate rock of middle-low-grade, is taken as an initial raw material, phosphorus-nitrogen type halogen-free composite flame retardant is synthesized directly, and the cost of the phosphorus-nitrogen type halogen-free composite flame retardant is reduced. Moreover, according to the method, the utilization ratio of phosphorus in phosphate rock can be more than 95 percent, so that the method is an effective method for solving problems in developing and utilizing Chinese middle-low-grade phosphate rock.

Description

technical field [0001] The invention relates to a method for preparing a flame retardant from phosphate rock, which belongs to the field of chemical technology. Background technique [0002] With the rapid development of polymer synthetic materials, polymer materials have gradually replaced traditional materials and are widely used in chemical industry, machinery, electronics, automobiles, aerospace and other fields. However, most polymer materials are combustible or inflammable materials, so in order to make polymer materials can be safely applied, the development and application of flame retardants have also been developed rapidly. Traditional halogen-containing flame retardants are gradually withdrawn from the application field due to the generation of toxic gases and environmental pollution during combustion. The development and application of halogen-free flame retardants has become the focus of current research. [0003] Based on the synergistic and synergistic effec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/3492C08L23/12
Inventor 聂登攀王振杰薛安赵伟毅薛涛吴向党张新吴学庆何灏吴素彬赵丽君刘安荣
Owner 贵州合众拓源磷资源综合利用技术股份有限公司
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