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A kind of preparation method and application of polyhydroxy phosphate

A technology of polyhydroxy phosphate and phosphoric acid, which is applied in chemical instruments and methods, phosphorus organic compounds, compounds of Group 5/15 elements of the periodic table, etc., and can solve problems such as low yield, long reaction time, and incomplete reaction , to achieve the effect of high product quality, simple and convenient preparation method and low cost

Active Publication Date: 2020-04-21
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method always has the problems of incomplete reaction, long reaction time and low yield.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 6.8 g (0.1 mol) of imidazole into a three-necked flask equipped with a condenser tube (connected to the tail gas absorption device) and a thermometer, and then add AlCl 3 6.6g (0.05mol) was reacted at room temperature for 5h, and the reaction was stopped to obtain the final product Catalyst 1 with a yield of 97.8%.

Embodiment 2

[0025] Add 9.3 g (0.1 mol) of 3-methylpyridine into a three-necked flask equipped with a condenser tube (connected to the tail gas absorption device) and a thermometer, and then add FeCl 3 4.86g (0.03mol), reacted at room temperature for 5h, stopped the reaction, and obtained the final product Catalyst 2 with a yield of 98.2%.

Embodiment 3

[0027] Add 7.9g (0.1mol) of pyridine into a three-necked flask equipped with a condenser tube (connected to the tail gas absorption device) and a thermometer, and then add ZnCl 2 12.24g (0.09mol), reacted at room temperature for 5h, stopped the reaction, and obtained the final product Catalyst 3 with a yield of 97.2%.

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Abstract

The invention discloses a preparation method and applications of a polyhydroxy phosphate. The preparation method comprises following steps: a phosphorus-containing acid is delivered into a reaction device, an ionic liquid is added as a catalyst, and an epoxy compound is added for ring-opening reaction so as to obtain the polyhydroxy phosphate. The preparation method is simple and convenient; the ionic liquid is taken as a catalyst, is excellent in catalytic effect, and low in using amount, and is capable of realizing high efficiency convenient synthesis of the polyhydroxy phosphate. The quality of the polyhydroxy phosphate is high; the polyhydroxy phosphate is excellent in color; no additional dehydration treatment is needed; no side product is generated in synthesis process; no environment pollution is caused; cost is low; the preparation method is simple; requirements of green chemistry are satisfied. The total polyhydroxy phosphate yield ranges from 85 to 99%, and is capable of reaching 90% or higher usually; and the polyhydroxy phosphate can be added into materials as a reaction-type fire retardant.

Description

technical field [0001] The invention relates to polyhydroxy phosphate in chemical materials, in particular to a preparation method and application of polyhydroxy phosphate with ionic liquid as a catalyst. Background technique [0002] Polyhydroxy phosphate is an excellent flame retardant that can be widely used in synthetic materials, building insulation materials, cables, batteries, soft (hard) polyurethane foam, etc. It can be directly added to materials as an additive flame retardant, It can also be used as a flame retardant monomer to participate in the reaction of materials. The flame retardant effect is remarkable, and it also has good anti-oxidation and plasticizing effect. As a reactive flame retardant, it can last for a long time and is not easy to precipitate. [0003] The main methods currently used for polyhydroxy phosphate are the following. One is the reaction of phosphorus oxychloride with polyols or polyphenols to generate polyhydroxy phosphate and hydrogen ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F9/09C07F9/32C07F9/08C08K5/521C08K5/5313
CPCC07F9/093C07F9/098C07F9/3258C08K5/521C08K5/5313
Inventor 杨锦飞姜浩徐洋职慧珍黄小冬
Owner NANJING NORMAL UNIVERSITY
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