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Production process for increasing yield of thiophosphoryl chloride

A technology for the production process of phosphorous trichloride, which is applied in the field of production process for improving the yield of phosphorous trichloride, can solve the problems of residual residue, increase of production cost, and difficult cleaning of residue, so as to avoid pollution, avoid waste, and facilitate operation Effect

Active Publication Date: 2021-02-05
XUZHOU JIANPING CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, due to the use of catalyst in the process of preparing phosphorus trichloride from phosphorus trichloride and sulfur, too much residue will be retained in the reactor, and the residue is difficult to clean up, and the use of catalyst also increases the production cost. , how to improve the productive rate of phosphorus trichloride without using a catalyst is a problem to be solved at present

Method used

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  • Production process for increasing yield of thiophosphoryl chloride
  • Production process for increasing yield of thiophosphoryl chloride
  • Production process for increasing yield of thiophosphoryl chloride

Examples

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Embodiment 1

[0032] A production technique for improving the yield of phosphorus trichloride, specifically comprising the following steps:

[0033]Step S1, prepare the following raw materials in parts by weight, 10 parts of sulfur, 5 parts of phosphorus trichloride, and 50 parts of phosphorus trichloride, set aside;

[0034] Step S2: Add phosphorus trichloride into the raw material metering tank 01, put sulfur into the reactor 02 through the solid feed pipe 24, raise the temperature in the reactor 02 to 120°C, make the sulfur molten, and then turn on the second Two motors 231, rotating speed 50r / min stirring 5min, connect the discharge end of raw material metering tank 01 with liquid feed pipe 25, then make phosphorus trichloride enter reaction kettle 02 through dispersing pipe 251 and dropper 252, control reaction tank 2 When the internal temperature is 124°C, turn on the second motor 231 again, start the first motor 5 at the same time, and stir at a speed of 150r / min for 30min, so that s...

Embodiment 2

[0037] A production technique for improving the yield of phosphorus trichloride, specifically comprising the following steps:

[0038] Step S1, prepare the following raw materials in parts by weight, 13 parts of sulfur, 8 parts of phosphorus trichloride, and 65 parts of phosphorus trichloride, for later use;

[0039] Step S2: Add phosphorus trichloride into the raw material metering tank 01, put sulfur into the reactor 02 through the solid feed pipe 24, raise the temperature in the reactor 02 to 125°C, make the sulfur molten, and then turn on the second Two motors 231, rotating speed 80r / min stirring 8min, connect the discharge end of raw material metering tank 01 with liquid feed pipe 25, then make phosphorus trichloride enter reaction kettle 02 through dispersion pipe 251 and dropper 252, control reaction tank 2 The inner temperature is 125°C, turn on the second motor 231 again, and start the first motor 5 at the same time, and stir at a rotating speed of 200r / min for 35min,...

Embodiment 3

[0042] A production technique for improving the yield of phosphorus trichloride, specifically comprising the following steps:

[0043] Step S1, prepare the following raw materials in parts by weight, 16 parts of sulfur, 10 parts of phosphorus trichloride, and 80 parts of phosphorus trichloride, set aside;

[0044] Step S2: Add phosphorus trichloride into the raw material metering tank 01, put sulfur into the reactor 02 through the solid feed pipe 24, raise the temperature in the reactor 02 to 130°C, make the sulfur molten, and then turn on the second Two motors 231, rotating speed 100r / min and stirring for 10min, connect the discharge end of the raw material metering tank 01 with the liquid feed pipe 25, then make phosphorus trichloride enter the reactor 02 through the dispersion pipe 251 and the dropper 252, and control the reactor tank 2 When the internal temperature is 126°C, turn on the second motor 231 again, start the first motor 5 at the same time, and stir at a rotatin...

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Abstract

The invention discloses a production process for increasing the yield of thiophosphoryl chloride, and aims to solve the problems that in the traditional process, since a catalyst does not participatein chemical reaction, the catalyst is accumulated after the chemical reaction is finished, regular manual cleaning is needed, and time and labor are wasted. The addition of the catalyst in the traditional thiophosphoryl chloride production process is replaced by a heat-conducting oil heating mode, and the yield of thiophosphoryl chloride is increased by increasing the temperature. The invention further discloses a reaction kettle, by arranging two motors, the reaction tank and a stirring mechanism in the reaction tank move reversely, materials in the reaction tank make contact with each othermore sufficiently, a chemical reaction is conducted more thoroughly, a scraper is arranged in the reaction tank, materials adhering to the inner wall of the reaction tank can be scraped, and the reaction kettle is convenient to operate and high in practicability. In addition, two flange plates are arranged at the upper end of the reaction kettle and connected through bolts, so that the reaction kettle is convenient to disassemble and maintain, simple in structure, convenient to operate and high in safety.

Description

technical field [0001] The invention belongs to the field of fine chemicals, and in particular relates to a production process for improving the yield of thion trichloride. Background technique [0002] Phosphorus trichloride, molecular formula PSCl 3 , the molecular weight is 169.42, the melting point is -35°C, the boiling point is 125°C, the appearance is a colorless or light yellow liquid with a pungent smell, it is insoluble in cold water for a short time, it decomposes slowly in cold water, and it can neutralize alkaline solution in hot water Rapidly decomposes in medium, soluble in organic solvents such as benzene, carbon tetrachloride, carbon disulfide, chloroform, chloroform, etc., and has a strong effect with ethanol, methanol, etc., and co-heats with sodium hydroxide solution to produce sodium thiophosphate. [0003] Phosphorus trichloride is mainly used as a widely used raw material in the production of organophosphorus pesticides. It is used to synthesize import...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/00B01J4/02B01J19/00B01J19/28
CPCC01B25/00B01J19/28B01J19/0053B01J19/0066B01J19/0013B01J19/0006B01J4/02B01J2219/00135B01J2219/00094B01J2204/002
Inventor 张坤王化建殷浩刘锦辉
Owner XUZHOU JIANPING CHEM
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