A kind of acetic acid chlorination reactor and reaction process method

A chlorination reaction and reactor technology, applied in the field of an acetic acid chlorination reaction process method and its supporting reactor, can solve the problems of high energy consumption, large investment, low yield of chloroacetic acid, etc., and reduce investment and energy consumption , the effect of speeding up the response

Inactive Publication Date: 2011-12-14
TAIYUAN UNIV OF TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the acetic acid chlorination reaction process and its supporting reactor of the present invention is to solve the technical scheme of slow reaction speed, high energy consumption, large investment and low yield of chloroacetic acid in the acetic acid chlorination process

Method used

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  • A kind of acetic acid chlorination reactor and reaction process method
  • A kind of acetic acid chlorination reactor and reaction process method
  • A kind of acetic acid chlorination reactor and reaction process method

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Experimental program
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Effect test

Embodiment 1～3

[0025] use figure 1 The shown reactor adopts continuous operation, and the reactor volume V (V 1 +V 2 )=140 liters, adjust the volume of the two reaction zones by changing the position of the perforated plate, namely V 1 with V 2 At the beginning, 90 kg of acetic acid (M2) was added from the feed port of the second reaction zone on the upper part, and 9.5 kg of acetic anhydride (M1) was added from the feed port of the first reaction zone on the lower part, and both the first and second reaction zones were controlled at 100 °C , chlorine gas is introduced from the chlorine gas distribution device 3, and the rate of chlorine gas introduction is 1.4-1.6m 3 / h, adjust according to whether the condenser is yellow, react for 10h, then change to continuous feeding, during the continuous feeding operation, the amount of acetic acid added M2 = 14.0kg / h, enter the second reaction from the upper feeding port zone, the addition of acetic anhydride M1 = 1.48kg / h, enters the first reacti...

Embodiment 4～5

[0029] use figure 1 The reactor structure and process shown in the comparative experiment. Adopt batch-type operation, adjust the reaction temperature of two reaction zones and compare, 110kg of acetic acid addition amount, 12kg of acetic anhydride addition amount at the beginning. The temperatures of the first reaction zone and the second reaction zone are respectively T 1 and T 2 , the chlorine gas flow rate is adjusted according to whether the condenser is yellow. The condensed reflux enters the first zone and the second zone respectively according to L1:L2=7:3 (weight ratio). The results are shown in Table 2.

[0030] Table 2 Reaction result table

[0031]

Embodiment 6

[0033] The reactor can be designed as two or more sections in series, and the diameter and shape of each section can be consistent or inconsistent. The reactor can also be designed as two or more sections, each section is a reaction area, and the reaction area is used The perforated plates are separated, and the temperature of each reaction zone can be independently controlled and adjusted, and the feeding or discharging of each zone can also be independently controlled. The ideal reaction zone is two, and the volume ratio of the two reaction zones is that the ratio of the first reaction zone volume (lower part) V1 to the second reaction zone (upper part) volume V2 ratio is 1:0.6 to 1:25, and the ideal range is 1:3 to 1:8.

[0034] Such as figure 2 Among them, a reactor is composed of two parts, b is a two-stage shrinkage series connection, and c is a unequal diameter series connection.

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Abstract

The invention discloses an acetic acid chlorination reaction process and a complete reactor. The acetic acid chlorination reactor are divided into two reaction regions, namely a second (upper) reaction region and a first (lower) reaction region, which are separated by a porous partition board; and the upper and lower two reaction regions can be heated or cooled under independent control and both have enough feed inlets or discharge holes. By controlling a feeding mode and reaction temperatures, the catalyst concentration and reaction temperatures in the two reaction regions are differentiated; by controlling the material exchange amounts in the upper and lower reaction regions, the reaction speeds in the two regions are different; and thus, the chloroacetic acid concentrations in the two reaction regions are different. The acetic acid chlorination reaction process and the complete reactor have the advantages of solving the problems of low reaction speed, high energy consumption, big investment, low chloroacetic acid yield and the like in the prior art.

Description

technical field [0001] The invention relates to a reaction process for preparing chloroacetic acid by chlorination of acetic acid, which belongs to the research field of gas-liquid reaction, and specifically relates to a process method of chlorination reaction of acetic acid and a matching reactor. Background technique [0002] In the production process of preparing chloroacetic acid by chlorination of acetic acid, the chlorination of acetic acid is an important step. The chlorination reaction of acetic acid is relatively slow, and it is difficult to completely react the chlorine gas in the first-order reaction. Generally, two-stage series reactions are used, that is, starting from Chlorine gas is fed into the first stage to react with acetic acid, and then enters the second stage to completely react the unreacted chlorine gas in the first stage. The reaction is mainly based on the first stage. The hydrogen chloride gas generated in the reaction process needs to be condensed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J10/00C07C53/16C07C51/363
Inventor 吕志平卫存生周立乔薛建伟李福祥秦梦庚
Owner TAIYUAN UNIV OF TECH
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