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Chloroacetic acid production device and process

A production device and production process technology, applied in the field of new devices for continuous and self-controlled production of chloroacetic acid by sulfur catalysis, can solve the problems of poor production continuity, low degree of automation, and low production efficiency, and achieve reduced equipment investment, high degree of automation, and The effect of reducing the labor intensity of personnel

Active Publication Date: 2021-10-08
HUBEI TAISHENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production continuity of the entire production system is poor, the degree of automation is low, and valves need to be switched repeatedly according to different stages, the production efficiency is low, and the labor intensity is high

Method used

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  • Chloroacetic acid production device and process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A chloroacetic acid production device, the acetic acid feed pipe is connected to the top feed port of the auxiliary reactor 4, the upper feed port of the auxiliary reactor 4 is connected to the sulfur metering tank 5, and the bottom outlet of the auxiliary reactor 4 is transferred through the auxiliary reactor The pump 8 is connected to the upper inlet of the main reactor 1 through a pipeline, the chlorine gas pipe is connected to the upper inlet of the main reactor 1, and the outlet at the bottom of the main reactor 1 is connected to the feed port of the chloroacetic acid water distribution tank through a pipeline.

[0033] The gas outlet of the main reactor 1 is connected to the upper inlet of the first-stage exhaust gas condenser 2 of the main reactor, the lower gas outlet of the first-stage exhaust gas condenser 2 of the main reactor is connected to the inlet of the second-stage exhaust gas condenser 3 of the main reactor, and the second exhaust gas of the main reacto...

Embodiment 2

[0041]Taking the production of chloroacetic acid with an annual output of 60,000 tons as an example, the production device needs to be equipped with 16 sets of 10,000L enamel kettles connected in parallel as main kettles, 6 sets of 10,000L enamel kettles connected in parallel as auxiliary kettles, and 1 set of acetic acid washing tower and acetic acid washing tank; each set of main The kettle is equipped with two 40㎡ graphite heat exchangers, the cooling medium of the primary condenser of the main kettle is circulating water, and the secondary condenser of the main kettle uses frozen brine as the cooling medium; the main kettle is equipped with a feed switch valve to control the main The kettle is automatically fed, and the main kettle is equipped with a discharge switch valve to control the automatic discharge of the main kettle. Chlorine flow; the main reactor is equipped with a jacketed water inlet regulating valve, outlet water switch valve, steam inlet regulating valve and...

Embodiment 3

[0043] This device can increase the production capacity of the device by increasing the number of main kettles and auxiliary kettles in the same proportion. Taking the production of chloroacetic acid with an annual output of 80,000 tons / year as an example (based on the annual production days of 330 days), the production device needs to be equipped with 22 sets of 10,000L enamel The kettles are connected in parallel as the main kettle and 9 sets of 10000L enamel kettles are connected in parallel as auxiliary kettles and 1 set of acetic acid washing tower and acetic acid washing tank; each set of main kettle is equipped with two 40㎡ graphite heat exchangers, and the cooling medium of the primary condenser of the main kettle is circulating water , the secondary condenser of the main kettle uses -15°C frozen brine as the cooling medium; the main kettle is equipped with a feed switch valve to control the automatic feeding of the main kettle, and the main kettle is equipped with a dis...

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Abstract

The invention relates to a chloroacetic acid production device and process. According to the chloroacetic acid production device and process, acetic acid and chlorine are used as raw materials, sulfur is used as a catalyst, acetic acid is automatically metered and fed into a side reaction kettle through a flow meter, sulfur can be metered and fed into the side reaction kettle through a metering tank, the chlorine is absorbed through reaction in the side reaction kettle, and a catalytic reaction is implemented in the side reaction kettle; reaction liquid is transferred into a main reaction kettle by using a pump, chlorine is introduced for reaction, blowing is conducted after the reaction reaches an end point, and the reaction liquid is put into a water distribution tank through a pipeline to prepare an aqueous solution; and reaction gas of the main reaction kettle is introduced into an acetic acid washing tower for washing through a pipeline after being condensed for recovery of a condensate, and then enters an acid recovery system after being condensed by a primary condenser for recovery of a condensate, acetic acid and hydrochloric acid are recovered, and tail gas is ensured to reach the standard and then to be discharged. According to the device and the method, the number of the main and auxiliary kettles is matched according to yield requirements, a utilization rate is high through continuous feeding and discharging of the multiple main and auxiliary kettles, an automation degree is high, production continuity is high, and meanwhile, product quality is improved through stable control.

Description

technical field [0001] The patent of the present invention relates to a chloroacetic acid production device, specifically a new device for continuous and self-controlled production of chloroacetic acid by sulfur catalysis. Background technique [0002] Sulfur-catalyzed production of chloroacetic acid generally adopts a batch production process, and its chemical reaction formula is that acetic acid and chlorine gas are prepared in the presence of sulfur to obtain chloroacetic acid and hydrogen chloride gas. [0003] In the production process, two or more reaction kettles are generally used to alternately feed chlorine gas into a group for production. The main process is feed to the reactor—dosing sulfur—absorbing the exhaust gas from the main reactor as a secondary reactor—adding acetic acid and sulfur after the main reactor discharges and switching to the secondary reactor—switching the original secondary reactor to the main reactor. The entire production system has poor pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/24B01J4/02C07C51/363C07C53/16B01J31/02
CPCB01J19/24B01J19/2445B01J19/0053B01J4/001B01J4/02B01J19/0006B01J4/008C07C51/363B01J31/0231C07C53/16
Inventor 刘文洲覃华龙张凯李成强冯成
Owner HUBEI TAISHENG CHEM