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Equipment and process for synthesizing quaternary phosphonium salt from solid phosphorus pentachloride and dimethylamine

A technology of phosphorus pentachloride and dimethylamine, applied in the direction of phosphorus organic compounds, etc., can solve the problems of affecting the reaction yield, solid and gaseous reactants are not easy to mix uniformly, so as to improve the reaction yield, reduce the possibility of dissolution, The effect of preventing backflow

Pending Publication Date: 2020-09-15
ZHEJIANG HUAJI BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] During the reaction process, the solid and gas reactants are not easy to mix evenly, and the reaction produces a large amount of hydrogen chloride gas, and the dimethylamine gas in the reactant is discharged into the reactor together, which affects the reaction yield.

Method used

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  • Equipment and process for synthesizing quaternary phosphonium salt from solid phosphorus pentachloride and dimethylamine
  • Equipment and process for synthesizing quaternary phosphonium salt from solid phosphorus pentachloride and dimethylamine
  • Equipment and process for synthesizing quaternary phosphonium salt from solid phosphorus pentachloride and dimethylamine

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Embodiment 1

[0039] Such as figure 1 and figure 2 As shown, the equipment for the synthesis of quaternary phosphorus salts by solid phosphorus pentachloride and dimethylamine includes a reactor 1, and the reactor 1 is provided with a feed inlet 101, an air inlet pipe 102 and a flue gas outlet 103, and the flue gas outlet 103 is connected A spray cleaning device 2, the spray cleaning device 2 is connected to the gas drying device 3, and the gas drying device 3 is connected to the aeration device 4 through the gas return pipe 301, and the aeration device 4 is located at the bottom of the reaction kettle 1.

[0040] The air intake pipe 102 is also connected with the aeration device 4 . The aeration device 4 includes an aeration pipe 41 and several aerators 42 arranged on the aeration pipe 41, the air inlet pipe 102 and the air return pipe 301 are respectively connected to the aeration pipe 41, and the air inlet pipe 102 is connected to the first gas delivery pump 104 , the air return pipe ...

Embodiment 2

[0054] This embodiment is basically the same as Embodiment 1, the difference is that, as image 3 , Figure 4 and Figure 5 As shown, in the aerator 4, a cadmium sheet 424 is provided below the aeration micropore 423 of the aeration sheet 422, and the spacer is fixed on the aeration disk 421, and a plurality of convex parts are evenly arranged on the aeration sheet 422. 1. An aeration microhole 423 is correspondingly provided at the central position of each raised portion of the aeration sheet 422 . A core 429 is provided above the spacer 424 to cooperate with the protruding part, and an annular air flow channel is formed between the core 429 and the protruding part. An arc-shaped limiting groove 427 is provided on the inner surface between the four adjacent protrusions of the aeration plate 422, and the side of the spacer 424 near the aeration plate 422 has an arc-shaped closed groove 428 corresponding to the arc-shaped limiting groove 427. The central position of the arc-...

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Abstract

The invention belongs to the field of chemical synthesis equipment and processes, and relates to equipment for synthesizing quaternary phosphonium salt from solid phosphorus pentachloride and dimethylamine. The equipment comprises a reaction kettle, the reaction kettle is provided with a feed port, a gas inlet pipe and a flue gas outlet, the flue gas outlet is connected with a spray cleaning device, the spray cleaning device is connected with a gas drying device, the gas drying device is connected with an aeration device through a gas return pipe, and the aeration device is located at the bottom of the reaction kettle. The invention also discloses a process for synthesizing quaternary phosphonium salt by using the equipment. The process comprises the following steps: adding dichloroethaneinto the reaction kettle, starting the spray cleaning device, adding solid phosphorus pentachloride into the reaction kettle, and introducing dimethylamine gas; conveying the generated gas into the spray cleaning device, cleaning with concentrated alkali liquor, and drying; the dried gas is inputted into the aeration device at the bottom of the reaction kettle through a gas return pipe and is released in dichloroethane through the aeration device to continuously react with phosphorus pentachloride so that the reaction yield is improved.

Description

technical field [0001] The invention belongs to the field of chemical synthesis equipment and techniques, and relates to equipment and techniques for synthesizing quaternary phosphorus salts, in particular to equipment and techniques for synthesizing quaternary phosphorus salts with solid phosphorus pentachloride and dimethylamine. Background technique [0002] As catalysts, quaternary phosphorus salts are widely used in the field of chemical production. Adopt phosphorus pentachloride and dimethylamine to be as the equation of raw material synthetic quaternary phosphorus salt: [0003] [0004] Similarly, Chinese patent application [publication number: CN103319534A] discloses a preparation method of tetrakis (diethylamino) quaternary phosphonium salt, using phosphorus pentachloride as raw material, using halogenated alkanes as solvent, and triethylamine as acid-binding Add diethylamine dropwise to react. After the reaction is completed, the intermediate product is proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/06
CPCC07F9/06
Inventor 李瑞军温兴锋温超群孙建仁
Owner ZHEJIANG HUAJI BIOTECH