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Recovery treatment method of phosphine-containing industrial by-products

A technology for recycling and processing by-products, which is applied in chemical instruments and methods, compounds of group 5/15 elements of the periodic table, organic chemistry, etc., can solve the problems of difficult storage and purchase, and achieve good flame retardancy, Realize the effect of reorganization and utilization

Pending Publication Date: 2020-05-22
洪湖源泰科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CH 3 PCl 2 Extremely active, it is easy to react with water and oxygen in the air, it is not easy to be stored, and it is difficult to buy this compound on the market

Method used

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  • Recovery treatment method of phosphine-containing industrial by-products
  • Recovery treatment method of phosphine-containing industrial by-products
  • Recovery treatment method of phosphine-containing industrial by-products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This embodiment discloses a method for recovery and treatment of phosphine-containing industrial by-products, which comprises the following steps:

[0036] Take 200g of solid by-products produced in the production process of diethyl methylphosphite and put them in the reaction kettle, then add 10g of p-cresol, heat to 135-140°C under air-isolated conditions, and stir and react at this temperature for 2h; Gray-black solid, cooled to room temperature, added the gray-black solid to 400mL water several times, controlled the addition rate so that the reaction would not be too violent, stirred for 30 minutes after the addition, cooled to below 20°C, filtered to obtain brown-black Solid and the first filtrate; the phosphorus content in the first filtrate is measured to be 420ppm; wherein, the brown-black solid is a phosphorus-based flame retardant; the yield is 87%;

[0037] And the chemical reaction equation of phosphorus flame retardant is as follows:

[0038]

[0039] W...

Embodiment 2

[0041] This embodiment discloses a method for recovery and treatment of phosphine-containing industrial by-products, which comprises the following steps:

[0042] Take 1000g of solid by-products produced in the production process of diethyl methyl phosphite and put them in the reactor, then add 50g of bisphenol A, heat to 135-145°C under air-isolated conditions, and stir and react at this temperature for 2.5h; Gray-black solid, cooled to room temperature, added the gray-black solid to 2000mL water several times, controlled the addition rate so that the reaction would not be too violent, stirred for 30 minutes after the addition, cooled to below 25°C, filtered to obtain a gray solid And the first filtrate; the phosphorus content in the first filtrate is measured to be 390ppm; wherein, the gray solid is a phosphorus-based flame retardant; the yield is 90%;

[0043] And the chemical reaction equation of phosphorus flame retardant is as follows:

[0044] n is 0.85;

[0045] Wher...

Embodiment 3

[0047] This embodiment discloses a method for recovery and treatment of phosphine-containing industrial by-products, which comprises the following steps:

[0048] Take 1000g of the solid by-product produced in the production process of diethyl methyl phosphite and put it in the reaction kettle, then add 60g of bisphenol A, heat to 140-150°C under air-isolated conditions, and stir and react at this temperature for 2.5h; Gray-black solid, cooled to room temperature, added the gray-black solid to 2000mL water several times, controlled the addition rate so that the reaction would not be too violent, stirred for 30 minutes after the addition, cooled to below 25°C, filtered to obtain a gray solid And the first filtrate; the phosphorus content in the first filtrate is measured to be 410ppm; wherein, the gray solid is a phosphorus-based flame retardant; the yield is 85%;

[0049] And the chemical reaction equation of the phosphorus-based flame retardant is as in the above-mentioned em...

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Abstract

The invention discloses a recovery treatment method of a phosphine-containing industrial by-product, and belongs to the technical field of chemistry. The method comprises the following steps: puttinga byproduct generated in a production process of diethyl methyl phosphite into a reaction container, adding at least one of a phenolic compound, a binary or higher arylamine compound or a compound containing an ethylene oxide functional group, and carrying out a heating reaction under an air-isolated condition to obtain the phosphorus-based flame retardant. The preparation method is high in yield,and the obtained phosphorus-based flame retardant is good in flame retardant efficiency.

Description

technical field [0001] The invention relates to the recovery and utilization of phosphine-containing industrial by-products in the chemical production process, and belongs to the field of chemical technology, in particular to a recovery and treatment method for phosphine-containing industrial by-products. Background technique [0002] Methyl dichlorophosphine (CH 3 PCl 2 ) is an important intermediate in the synthesis of organophosphorus compounds and a key intermediate in the synthesis of diethyl methylphosphonite. Its synthesis was studied more abroad in the 1950s and 1970s, but less in China. The pure product is a colorless transparent liquid with a boiling point of (81-82) °C. CH 3 PCl 2 Extremely active, it is easy to react with water and oxygen in the air, it is not easy to be stored, and it is difficult to buy this compound on the market. CH 3 PCl 2 Main can be made by CH 4 、CH 3 Cl and CH 3 I and PCl 3 Reaction obtains; Wherein, the concrete process that a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/48C07F9/6521C07F9/6558C08K5/5393C08K5/5399C08K5/50C08L67/02
CPCC07F9/4875C07F9/6521C07F9/65586C08K5/5393C08K5/5399C08K5/50C08L2201/02C08L67/02
Inventor 沈开元沈道胜徐丹陈兵
Owner 洪湖源泰科技有限公司
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