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Preparation method of triethyl phosphite

A technology of triethyl phosphite and ethanol, applied in the field of preparation of triethyl phosphite, can solve the problems of low yield of triethyl phosphite, unrecoverable, complicated process, etc., and achieves high production efficiency , Easy to recycle, avoid secondary pollution effect

Inactive Publication Date: 2017-05-10
JIANGSU SUYUANHUIPU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are complex processes in the production process of triethyl phosphite, the yield of triethyl phosphite is not high, and because dimethylaniline is toxic, it cannot be recycled, causing pollution

Method used

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Examples

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Effect test

Embodiment 1

[0021] A preparation method of triethyl phosphite, its raw materials are as follows by weight: 3 milliliters of ethanol, 1 milliliter of phosphorus trichloride, 3 milliliters of dimethyl aniline, 12 milliliters of petroleum ether.

[0022] Described ethanol is dehydrated alcohol.

[0023] The petroleum ether is a mixture of pentane and hexane.

[0024] A preparation method of triethyl phosphite, comprising the steps of:

[0025] S1: Preparation of the dropping funnel and flask, sterilize the dropping funnel and flask in a high-temperature steam cabinet, and then dry them before use;

[0026] S2: Preparation of raw materials, respectively put ethanol, phosphorus trichloride, dimethylaniline and petroleum ether in the flasks prepared in S1;

[0027] S3 mixing treatment, the ethanol and dimethylaniline in S2 are placed on the dropping funnel to make ethanol mixed solution, then sherwood oil is imported in the flask containing phosphorus trichloride to make phosphorus trichlorid...

Embodiment 2

[0035] A preparation method of triethyl phosphite, the raw materials are as follows by weight: 4.5 milliliters of ethanol, 1.5 milliliters of phosphorus trichloride, 4.5 milliliters of dimethylaniline, and 18 milliliters of petroleum ether.

[0036] Described ethanol is dehydrated alcohol.

[0037] The petroleum ether is a mixture of pentane and hexane.

[0038] A preparation method of triethyl phosphite, comprising the steps of:

[0039] S1: Preparation of the dropping funnel and flask, sterilize the dropping funnel and flask in a high-temperature steam cabinet, and then dry them before use;

[0040] S2: Preparation of raw materials, respectively put ethanol, phosphorus trichloride, dimethylaniline and petroleum ether in the flasks prepared in S1;

[0041] S3 mixing treatment, the ethanol and dimethylaniline in S2 are placed on the dropping funnel to make ethanol mixed solution, then sherwood oil is imported in the flask containing phosphorus trichloride to make phosphorus ...

Embodiment 3

[0049] A preparation method of triethyl phosphite, the raw materials are as follows by weight: 6 milliliters of ethanol, 2 milliliters of phosphorus trichloride, 6 milliliters of dimethylaniline, and 24 milliliters of petroleum ether.

[0050] Described ethanol is dehydrated alcohol.

[0051] The petroleum ether is a mixture of pentane and hexane.

[0052] A preparation method of triethyl phosphite, comprising the steps of:

[0053] S1: Preparation of the dropping funnel and flask, sterilize the dropping funnel and flask in a high-temperature steam cabinet, and then dry them before use;

[0054] S2: Preparation of raw materials, respectively put ethanol, phosphorus trichloride, dimethylaniline and petroleum ether in the flasks prepared in S1;

[0055] S3 mixing treatment, the ethanol and dimethylaniline in S2 are placed on the dropping funnel to make ethanol mixed solution, then sherwood oil is imported in the flask containing phosphorus trichloride to make phosphorus trichl...

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PUM

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Abstract

The invention discloses a preparation method of triethyl phosphate. Triethyl phosphate is prepared from the following raw materials in parts by weight: 3 to 6 ml of ethyl alcohol, 1 to 2 ml of phosphorus trichloride, 3 to 6 ml of dimethylaniline and 12 to 24 ml of petroleum ether. According to the preparation method of triethyl phosphate, provided by the invention, a mixed reaction is carried out on the ethyl alcohol, phosphorus trichloride, dimethylaniline and the petroleum ether to prepare triethyl phosphate, triethyl phosphate is high in production efficiency and excellent in quality, the petroleum ether in the mixture is low in cost and easy to recycle, and dimethylaniline hydrochloride left after triethyl phosphate is prepared can also be used for recycling dimethylaniline in the mixture, so that secondary pollution is avoided.

Description

technical field [0001] The invention relates to the technical field of industrial raw materials, in particular to a preparation method of triethyl phosphite. Background technique [0002] Triethyl phosphite, a colorless transparent liquid with a specific odor. Molecular formula C6H15O3P. Insoluble in water, easily soluble in ethanol and ether, it will be hydrolyzed into diethyl phosphite in water for a long time. It can be used as a plasticizer, lubricating oil additive and stabilizer, as well as the intermediate of pesticide insecticides "Fotanong" and "Fetacarb", and the raw material of pharmaceutical analgesic agent thiopyridine, etc. At present, there are complex processes in the production process of triethyl phosphite, the yield of triethyl phosphite is not high, and because dimethylaniline is toxic, it cannot be recycled, causing pollution. Contents of the invention [0003] The objective of the invention is in order to solve the shortcoming that exists in the pr...

Claims

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Application Information

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IPC IPC(8): C07F9/142C07C209/86C07C211/48
CPCC07F9/142C07C209/86
Inventor 刘飞余根青
Owner JIANGSU SUYUANHUIPU CHEM
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