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Continuous production method and device for chloroformyl substituted benzenes

A chloroformyl group and a production method technology are applied in the field of continuous production methods and devices for chloroformyl substituted benzene, and can solve problems such as by-product hydrogen chloride being difficult to handle, environmental pollution, and unstable product quality.

Inactive Publication Date: 2015-05-06
SHANGHAI FANGLUN NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, although the preparation of chloroformyl-substituted benzene with trichloromethyl-substituted benzene as a raw material has fewer by-products than the traditional preparation method, the batch production method is usually used at present. If the industrial production will consume a lot of energy, the product Unstable quality, small output, low yield, environmental pollution, by-product hydrogen chloride is not easy to handle and other problems

Method used

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  • Continuous production method and device for chloroformyl substituted benzenes
  • Continuous production method and device for chloroformyl substituted benzenes

Examples

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Embodiment 1

[0064] Reference attached figure 1 , using 1,4-bis(trichloromethyl)benzene as a raw material, and carrying out acyl chloride reaction with 1,4-benzenedicarboxylic acid, the specific steps are as follows:

[0065] (1) Ingredients: Add 43.2Kg 1,4-bis(trichloromethyl)benzene into the batching kettle 12, add 10.8Kg 1,4-bis(chloroformyl)benzene as a solvent, and raise the temperature to make 1,4 - After bis(trichloromethyl)benzene is completely dissolved, add 22.17Kg of 1,4-benzenedicarboxylic acid according to 1.01 times the number of moles of 1,4-bis(trichloromethyl)benzene, and then add 22.17Kg of 1,4-bis( 0.25% of trichloromethyl) benzene weight adds 0.11Kg of iron trichloride catalyst, after reaction material mixes in batching kettle 12, promptly opens valve 14, and material is conveyed continuously to batching kettle 13, closes valve after conveying finishes 14. The batching kettle 12 continues batching to ensure the continuity of batching;

[0066] (2) After the batching s...

Embodiment 2

[0071] 1,3-bis(trichloromethyl)benzene is used as raw material, and 1,3-benzenedicarboxylic acid is used for acyl chloride reaction.

[0072] When batching, add 12.65Kg of 1,3-di(chloroformyl)benzene as a solvent.

[0073] The molar ratio of 1,3-bis(trichloromethyl)benzene to 1,3-benzenedicarboxylic acid is 1:1.03, and then add trichloride according to 0.28% of the weight of 1,3-bis(trichloromethyl)benzene Iron catalyst 0.14Kg

[0074] The amount of reactants and the operating process are shown in Table 1. The specific operation process is the same as in Example 1.

[0075] The crude product of 1,3-bis(chloroformyl)benzene obtained from the reaction was purified by rectification to obtain polymer grade 1,3-bis(chloroformyl)benzene with a purity of 99.95%. The rate is 96.1%.

Embodiment 3

[0077] Using 1,4-bis(trichloromethyl)benzene as raw material, and carrying out acyl chloride reaction with water;

[0078] When batching, add 750Kg of 1,4-di(chloroformyl)benzene as a solvent.

[0079] The molar ratio of 1,4-bis(trichloromethyl)benzene to water is 1:2.08, and 8.1Kg of ferric chloride catalyst is added according to 0.27% of the weight of 1,4-bis(trichloromethyl)benzene.

[0080] The amount of reactants and the operating process are shown in Table 1. The specific operation process is the same as in Example 1.

[0081] The crude product of 1,4-bis(chloroformyl)benzene obtained by the reaction was rectified to obtain polymer grade 1,4-bis(chloroformyl)benzene with a purity of 99.96%. ) Benzene yield is 95.6%.

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Abstract

The invention discloses a continuous production method for chloroformyl substituted benzenes. According to the method, uniformly mixed reaction materials are continuously added in a reaction system composed of multiple stages of reactors which are connected in series, and the reaction materials have reaction under certain temperature conditions, and after the materials continuously flow out of the reactors, a chloroformyl substituted benzene crude product is obtained; and gas produced in the reaction is subjected to condensation treatment, a chloroformyl substituted benzene condensed fluid flows back to the reaction system, and non-condensable gas is optionally further subjected to tail gas treatment. The invention also discloses a continuous production device for chloroformyl substituted benzenes; the device comprises a proportioning system, a reaction system and a condensing system, wherein the reaction system comprises more than two stages of reactors which are connected in series, and the device also can further comprise a purification system and a tail gas treatment system. According to the invention, the continuous production of chloroformyl substituted benzenes is realized by using the continuous production of trichloromethyl substituted benzenes, the quality of prepared products is good, the yield is high, and tail gas is easily treated.

Description

technical field [0001] The invention relates to a method and a device for producing chloroformyl-substituted benzene in the chemical industry, in particular to a continuous production method and device for chloroformyl-substituted benzene. Background technique [0002] Chloroformyl substituted benzene is a relatively important organic industrial raw material, which can be used as polyamide, polyester, polyarylate, polyarylamide, polyacrylate, high temperature resistant resin, liquid crystal polymer, insulating material, dye, pigment, Aramid and other monomers can also be used as modifiers for high polymers, intermediates in pesticide and pharmaceutical industries. Taking bis(chloroformyl)benzene as an example, it can be divided into o-, meta-, and p-bis(chloroformyl)benzene according to the different substitution positions of chloroformyl on the benzene ring, wherein o-bis(chloroformyl)benzene is It is an important starting material for the preparation of plasticizers and s...

Claims

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Application Information

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IPC IPC(8): C07C63/30C07C63/24C07C63/70C07C63/307C07C51/58C07C51/60C07C51/64B01J19/00B01J19/18B01J4/00B01J4/02B01D5/00
Inventor 王农跃邵建明赵全忠闻国强
Owner SHANGHAI FANGLUN NEW MATERIAL TECH
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