CN1718582A

CN1718582A - Preparation method of chloramine phos

Info

Publication number: CN1718582A
Application number: CN 200510018678
Authority: CN
Inventors: 李坚; 巨修练; 陈呈新
Original assignee: Wuhan Chemistry College
Current assignee: Jiangsu Heyi Chemical Industry Co., Ltd.
Priority date: 2005-05-11
Filing date: 2005-05-11
Publication date: 2006-01-11
Anticipated expiration: 2025-05-11
Also published as: CN100408586C

Abstract

A process for preparing thiophosphamide from O, O-dimethyl thiophosphamide and trichloroacetaldehyde through preparing the intermediate C, exchanging the sites of O and S in the intermediate by use of dimethyl sulfate (or carbonate), and preparing O, S-dimethyl (2, 2, 2-trichloro-1-hydroxy-ethyl) thio phosphamide. Its advantages are low cost and high purity.

Description

The preparation method of chloramines phosphorus

Technical field

The present invention relates to a kind of preparation method of chloramines phosphorus, the invention particularly relates to a kind of is intermediate or raw material by changing in the former chloramines phosphorus production method with the acephatemet, and the approach of synthetic new midbody compound prepares the method for chloramines phosphorus.

Background technology

Chloramines phosphorus is a kind of Pesticidal compound of innovation, is a kind of novel derivative of acephatemet, obtains State Intellectual Property Office of the People's Republic of China's license 2000 Christian eras, the patent No.: ZL97112828.6, international monopoly Main classification number: ADIN57/28.And obtained the Ministry of Agriculture's registration permission 2005 Christian eras, will enter extensive industrialization very soon, the commercial stage.

The chemical name of chloramines phosphorus: O, S--dimethyl (2,2,2-three chloro-1-hydroxyl-ethyls) thio-phosphamide.

Structural formula:

Molecular formula:

C ₄H ₉CL ₃NO ₃PS

Relative molecular mass 288.52.

Pure product are white, needle-shaped crystals, fusing point 99.2-101 ℃, be dissolved in organic solvents such as benzene, dimethylbenzene, chlorinated hydrocarbon, methyl alcohol, and be insoluble in water, to paddy rice, cotton, fruit tree, various crop such as wheat have the better prevention effect.

The chloramines phosphorus preparation method of ZL97112828.6 patented invention, determine with the acephatemet to be intermediate or feedstock production chloramines phosphorus, the Pesticidal compound of the existing 30 years production histories of acephatemet, prepare chloramines phosphorus with this method two main defectives are arranged: 1, acephatemet belongs to hypertoxic sterilant, after 2007 Christian eras, China will completely forbid the application of acephatemet as sterilant, do not allow the derivative of acephatemet yet, when using as sterilant, wherein the remaining content of acephatemet surpasses strict required standard, production technique according to original preparation method's formulation, in order to reach this standard, need to increase processing step, thereby increase production cost, increase the pollutent that chloramines phosphorus is produced.2, in decades; the acephatemet commodity that China produces; former medicine content in the former medicine of acephatemet commodity, contains a large amount of impurity all below 75%; along with the more and more attention of countries in the world to environment protection; specification of quality to the agricultural chemicals commodity is also more and more higher, and the acephatemet with 75% is a feedstock production chloramines phosphorus, in order to reach the requirement of content 〉=90%; must dispose unit chemical processes such as corresponding separation and processing, not only increase production cost but also increased source of pollution.

Summary of the invention

Purpose of the present invention is in order to overcome the defective that above-mentioned prior art exists, a kind of method of chloramines phosphorus is provided, this method does not need to use acephatemet fully, and by the new intermediate of preparation, use new way instead and produce chloramines phosphorus, in acephatemet remaining quantity in eliminating the former medicine of chloramines phosphorus fully and the raising chloramines phosphorus content, reduce production costs, reduce source of pollution.

Preparation method of the present invention is with 0,0--dimethyl thiophosphoryl amide and trichoro-aldehyde are raw material, prepare 0,0--dimethyl (2,2,2--three chloro-1-hydroxyl-ethyls) thio-phosphamide, with it as intermediate, with methyl-sulfate or methylcarbonate transposition, further prepare chloramines phosphorus, synthesis route:

A--0, the 0--dimethyl thiophosphoryl amide has another name called spermine

The B--trichoro-aldehyde

C--0,0-dimethyl (2,2,2-three chloro-1-hydroxyl-ethyls) thio-phosphamide

D--chloramines phosphorus

Spermine A is the main intermediate of producing acephatemet and acephate, and trichoro-aldehyde is the main intermediate of producing Trichlorphon and SD-1750, and all there is mass production in China.Content 〉=95% of the spermine product that China produces, content 〉=97% of the trichoro-aldehyde product of production, a preparation method's of the present invention important feature is that to select concentration for use be 95% spermine, is feedstock production chloramines phosphorus and do not select the acephatemet of content 75% for use.

Result of study of the present invention shows, the more original preparation method of preparation method of the present invention, and production cost reduces more than 10%, and impurity and waste treatment amount reduce 30%, and the chloramines phosphorus content of preparation improves 20%.

Embodiment

Original preparation technology:

Content 73% chloramines phosphorus obtains content 90% chloramines phosphorus through impurity and waste treatment again.

Preparation technology of the present invention, the solvent of spermine is not crucial in this technology, can also use other organic solvent except toluene.

Example 1:

Step 1

Weight ratio: spermine A: trichoro-aldehyde=1: 1.13

In 100g 95% spermine A and the disposable input 500ml reaction flask of 50ml toluene, start and stir, controlled temperature is not less than 5 ℃ below 30 ℃, beginning slowly drips 97% trichoro-aldehyde, drip trichoro-aldehyde 113g altogether, dripped off in about 1 hour, after dripping off, start from 29 ℃ of insulation reaction, use the liquid chromatography trace analysis, spermine content≤0.5% in reaction solution, reaction is terminal point, about 5 hours insulation reaction time, in 5 ℃ of sedimentations, crystallization has a large amount of white solids to produce, and filters, oven dry, the gained solid is intermediate C, get the heavy 116g of solid, 68 ℃ of fusing points, content 〉=98%, filter mother liquid obtained can recycling, toluene solvant substitute when mother liquor is as building-up reactions next time each time with the C intermediate that uses mother liquor to produce, must be measured 187g, content 97%, after using 11 times continuously, through rectification process, rectifying liquid can continue again to use.

Step 2

Weight ratio: C: methyl-sulfate=1: 0.06

In 100g97%C solid and the disposable input 500ml reaction flask of 100g sherwood oil, start and stir, controlled temperature 50-60 ℃, slowly drip methyl-sulfate, drip 98% methyl-sulfate 6g altogether, dripped off, and used the liquid chromatography trace analysis in about 0.6-1 hour, C solids content≤1% o'clock in the assaying reaction system is reaction end.0 ℃ of left and right sides crystallization, filtering drying gets chloramines phosphorus D, the heavy 91g of solid, 99 ℃ of fusing points, content 98%.Filtrated stock can recycle.

Example 2

Step 1

Weight ratio: 98% spermine: trichoro-aldehyde=1: 3

In the disposable input 500ml reaction flask of 300g98% trichoro-aldehyde, start and stir, controlled temperature is below 30 ℃, be not less than 5 ℃, beginning slowly drips 95% spermine, amounts to 100g, after dripping off,, be warming up to 60 ℃ again in 40 ℃ of insulation reaction 3 hours, continue insulation reaction 2 hours, and be reaction end, then under high vacuum, steam unnecessary trichoro-aldehyde, be cooled to normal temperature, add the 100g normal hexane, stir, measure wherein C intermediate content, content about 60%.

Step 2

Weight ratio: C: methylcarbonate=1: 0.2

In 20g methylcarbonate and the disposable input 500ml reaction flask of 100g sherwood oil, controlled temperature 40-50 ℃, slowly drip the C hexane solution that above-mentioned steps one produces, after dripping off, continued insulation reaction 2 hours, be reaction end,, filter 0 ℃ of left and right sides crystallization, oven dry, get chloramines phosphorus solid 93g, content 98%, filtrated stock can recycle.

Example 3

Step 1

Weight ratio: spermine: trichoro-aldehyde=1: 2.5

In the disposable input 500ml reaction flask of 250g98% trichoro-aldehyde, start and stir about 38 ℃ of controlled temperature, slowly drip 98% spermine, amount to 100g, after dripping off, in 15 ℃ of left and right sides continuously stirring reactions 32 hours, there are a large amount of solids to separate out, lower the temperature 5 ℃ then, crystallization, filter, oven dry gets the C intermediate, the heavy 189g of solid, content 98%.Filtrated stock can recycle.

Step 2: with the step 2 in the above-mentioned example 1.

Claims

1, a kind of preparation method of chloramines phosphorus, with O, O-dimethyl thiophosphoryl amide and trichoro-aldehyde are raw material, preparation O, O-dimethyl (2,2,2-three chloro-1-hydroxyl-ethyls) thio-phosphamide intermediate C, again with O, O-dimethyl (2,2,2-three chloro-1-hydroxyl-ethyls) thio-phosphamide intermediate C with oxygen, sulphur transposition, finally prepares O by methyl-sulfate or methylcarbonate, S-dimethyl (2,2,2-three chloro-1-hydroxyl-ethyls) thio-phosphamide, chloramines phosphorus D just

Its chemical equation is as follows:

2, according to the preparation method of the described chloramines phosphorus of claim 1, it is characterized in that: first step: O, O-dimethyl (2,2,2-three chloro-1-hydroxyl-ethyls) preparation of thio-phosphamide drops into 95% spermine A and solvent in the reactor, starts and stirs, controlled temperature is between 5-30 ℃, slowly drip 97% trichoro-aldehyde, after dripping off, start from 29 ℃ of insulation reaction, use the liquid chromatography trace analysis, spermine content≤0.5% in reaction solution, reaction is terminal point, in 5 ℃ of sedimentations, crystallization, filter, dry, the gained solid is intermediate C; Second step: the preparation of chloramines phosphorus, intermediate C and solvent are dropped in the reactor, start and stir controlled temperature 50-60 ℃, slowly drip methyl-sulfate, after dripping off, use the liquid chromatography trace analysis, C solids content≤1% o'clock in the assaying reaction system, be reaction end, 0 ℃ of crystallization, filtering drying gets chloramines phosphorus D.

3, preparation method according to the described chloramines phosphorus of claim 1, it is characterized in that: first step: O, O-dimethyl (2,2,2-three chloro-1-hydroxyl-ethyls) preparation of thio-phosphamide, 98% trichoro-aldehyde is dropped in the reactor, start and stir, controlled temperature is between 5-30 ℃, beginning slowly drips 95% spermine, after dripping off,, be warming up to 60 ℃ again in 40 ℃ of insulation reaction 3 hours, continued insulation reaction 2 hours, be reaction end, under vacuum, steam unnecessary trichoro-aldehyde then, be cooled to normal temperature, add normal hexane, stir, obtain the hexane solution of intermediate C; Second step: the preparation of chloramines phosphorus, methylcarbonate and solvent are dropped in the reactor, controlled temperature 40-50 ℃, slowly drip the C hexane solution that above-mentioned steps one produces, after dripping off, continued insulation reaction 2 hours, be reaction end, 0 ℃ of crystallization, filter, oven dry gets chloramines phosphorus solid.

4, according to the preparation method of the described chloramines phosphorus of claim 2, it is characterized in that: the solvent of intermediate C is sherwood oil and normal hexane.