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Processing method of p-fluorobenzaldehyde

A technology of p-fluorobenzaldehyde and processing method, applied in the separation/purification of carbonyl compounds, organic chemistry and other directions, can solve the problems of little research progress, difficult quality control, long process route, etc., to increase the heat dissipation area and improve the heat dissipation. effect, the effect of accelerating heat dissipation efficiency

Pending Publication Date: 2021-10-29
江苏万隆化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the long process route, complex production, and difficult quality control, the cost of production has increased significantly.
The existing p-fluorobenzaldehyde production equipment takes a long time to produce, and the progress of industrial development research is not much, so now it is necessary to optimize the processing equipment of p-fluorobenzaldehyde, and improve the production efficiency by reducing the cooling and precipitation time, so now it is necessary to A kind of processing method and processing equipment of p-fluorobenzaldehyde

Method used

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  • Processing method of p-fluorobenzaldehyde
  • Processing method of p-fluorobenzaldehyde
  • Processing method of p-fluorobenzaldehyde

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The present invention provides such Figure 6 Shown, a kind of processing method of p-fluorobenzaldehyde comprises the following steps:

[0032] Add synthetic materials to the original solvent to obtain a mixed solution;

[0033] The mixed solution is heated and stirred in the reaction kettle to obtain a heated solution;

[0034] Transferring the heating liquid to the interior of the sedimentation tank through the rotating heat dissipation pipe for cooling to obtain a cooling solution;

[0035] After the temperature of the cooling solution is lowered to room temperature, the cooling solution is precipitated, and the inorganic salt in the cooling solution is attached and separated to obtain a filtrate;

[0036] The filtrate is subjected to rectification and separation to obtain p-fluorobenzaldehyde.

[0037] The original solvent is one of DMF, DMSO, NMP, DMI, and sulfolane, and the synthetic materials are 1mol of p-(o)chlorobenzaldehyde, 1-1.5mol of light anhydrous po...

Embodiment 2

[0041] On the other hand, the present invention provides such as Figure 1-3A kind of processing equipment of p-fluorobenzaldehyde shown, comprises reactor 1, rotating cooling pipe 6, settling tank 13 and rectifying separation tank 30, and the output end of rotating cooling pipe 6 is fixedly installed with sealing interface 7, and sealing interface 7 runs through The settling box 13 is fixedly installed, and the upper surface of the settling box 13 is fixedly installed with a heat dissipation bin 5, and the inside of the settling box 13 is movablely installed with a settling net 17, and the inside of the settling box 13 is provided with a cooling tank 18, and the inside of the cooling tank 18 is fixedly installed with a heat exchange tube 19 A water tank 23 is fixedly installed at the center of the top of the settling tank 13, and a fixed seat 27 is fixedly installed at the bottom of the settling tank 13, and the fixed seat 27 is fixedly connected to the rectifying separation t...

Embodiment 3

[0045] On the other hand, the present invention provides such as Figure 4-5 As shown: the inner box 14 is fixedly installed inside the sedimentation box 13, the inner wall of the inner box 14 is fitted and fixedly installed with a limit baffle 15, the outer surface of the sedimentation net 17 is fixedly installed with a limit ring 16, and the limit ring 16 is movably installed on the limit stop On the upper surface of the plate 15, the inner box 14 is provided to make the cooled liquid have a relatively stable precipitation position, and the limit baffle 15 is used to limit the information of the limit ring 16, so that the sedimentation net 17 can be installed movable and repaired in the later stage It can be disassembled and replaced flexibly, and the sedimentation net 17 installed in multiple layers can make the inorganic salts precipitate to the greatest extent.

[0046] A cooling rod 20 is fixedly installed on the top of the heat exchange tube 19, and a limit hole 21 is o...

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Abstract

The invention discloses a processing method and processing equipment of p-fluorobenzaldehyde. The method comprises the following steps: adding a synthetic material into an original solvent, stirring and reacting in a reaction kettle, transferring the obtained liquid into a settling tank through a rotary radiating pipe, cooling, after the temperature of the liquid reaches room temperature, precipitating and carrying out attachment separation on inorganic salts in the liquid, and carrying out rectification separation on the filtrate to obtain p-fluorobenzaldehyde. The reaction kettle is used for stirring to enable internal liquid to be fully mixed and reacted, the liquid is heated, a heat dissipation bin is used for dissipating heat of a rotary heat dissipation pipe, and a water tank mounted in the rotary heat dissipation pipe is used for spraying water vapor at regular time to physically cool the rotary heat dissipation pipe, the liquid in the settling tank is cooled again through a heat exchange pipe and water placed in the cooling tank in the settling tank, and settling is carried out in the process of cooling the liquid through a settling net, so that the production efficiency of the p-fluorobenzaldehyde is improved, and then the liquid is rectified and purified.

Description

technical field [0001] The invention relates to the technical field of processing p-fluorobenzaldehyde, in particular to a processing method and processing equipment for p-fluorobenzaldehyde. Background technique [0002] As an intermediate, p-fluorobenzaldehyde is widely used in fields such as medicine and pesticide. The existing production of p-fluorobenzaldehyde generally uses p-nitrotoluene as a raw material, and p-aminobenzaldehyde is obtained through oxidation-reduction reaction, and then p-fluorobenzaldehyde is obtained through nitriding and fluorination. Due to the long process route, complex production, and difficult quality control, the cost of production has increased significantly. The existing p-fluorobenzaldehyde production equipment takes a long time to produce, and the progress of industrial development research is not much, so now it is necessary to optimize the processing equipment of p-fluorobenzaldehyde, and improve the production efficiency by reducing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C45/78C07C45/81C07C45/82C07C47/55
CPCC07C45/78C07C45/81C07C45/82C07C47/55
Inventor 郁红明
Owner 江苏万隆化学有限公司