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Device and method for preparing monochloroacetone by multi-tower reaction

A monochloroacetone, reaction technology, applied in the field of chemical equipment, can solve the problems of monochloroacetone price rise, environmental hazards, acetone is volatile, etc., to achieve precise control of chlorine gas flow, no chlorine gas leakage, and no pollution in the reaction

Active Publication Date: 2014-07-23
江阴市利港第二化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reaction device is a tower reactor. Since there is only one ceramic tower joint at the top of the reactor, the reaction condensation is not sufficient, and the amount of chlorine added is not easy to control, which is easy to increase by-products. The top escapes directly into the atmosphere. In addition, because acetone is volatile and the reaction is insufficient, acetone gas is also volatile to the outside world, causing harm to the environment.
Due to these defects, the National Development and Reform Commission included it in the catalog of high-pollution and high-risk products in 2013, restricting its production
Due to limited production, the price of monochloroacetone has risen accordingly, and the supply is tight

Method used

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  • Device and method for preparing monochloroacetone by multi-tower reaction

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Embodiment 1

[0018] see figure 1 , the present invention relates to a multi-tower reaction device for producing monochloroacetone, comprising a reactor 1, four ceramic tower sections 2 are arranged on the top of the reactor 1, and a tubular glass condenser is arranged on the top of each ceramic tower section 2 3. The diameter of the tubular glass condenser 3 is consistent with the diameter of the ceramic tower section 2, and the gas outlets at the top of the two tubular glass condensers 3 are connected to the first buffer tank 4 through a condensing device, and the other two tubular glass condensers The gas outlet at the top of the condenser 3 is connected to the second buffer tank 5 through a condensing device, and the liquid outlets at the bottom of the first buffer tank 4 and the second buffer tank 5 are respectively connected to the third buffer tank 6, and the third buffer tank The liquid outlet at the bottom of 6 is connected to the reaction kettle 1, and the tail gas outlet at the t...

Embodiment 2

[0022] A method for producing monochloroacetone by multi-tower reaction. Chlorine gas is added from the upper part of the second section or the lower part of the third section of each ceramic tower section 2, and enters the reaction kettle 1 to undergo a replacement reaction with acetone. Observe the tube at the bottom. Type glass condenser 3, when the color appears, it shows that the amount of chlorine added is too large and the reaction is not sufficient. At this time, reduce the flow of chlorine added and increase the flow of cooling water to make the reaction sufficient. Through the regulation of the four ceramic tower sections 2 and the tubular glass condenser 3, the flow of chlorine gas can be precisely controlled, the reaction is sufficient, the yield is improved, and there is no leakage of chlorine gas, and the reaction of the whole system is pollution-free.

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Abstract

The invention relates to a device for preparing monochloroacetone by multi-tower reaction. The device for preparing monochloroacetone by multi-tower reaction comprises a reaction kettle (1). The device for preparing monochloroacetone by multi-tower reaction is characterized in that the top end of the reaction kettle (1) is provided with a plurality of ceramic tower sections (2); the top end of each ceramic tower section (2) is directly provided with a tubular glass condenser (3); a top gas exhaust end of each tubular glass condenser (3) is connected with buffer tanks by condensing devices; liquid outlets in the bottom ends of the buffer tanks are connected with the reaction kettle (1); tail gas outlets in the top parts of the buffer tanks are connected with a hydrogen chloride recycling tank by the condensing devices. According to the invention, the chlorine flow rate can be controlled accurately by the regulating effect of the plurality of ceramic tower sections and the tubular glass condensers; the reaction is full; the yield is improved; chlorine does not leak; the whole system has no pollution in reaction.

Description

technical field [0001] The invention relates to a multi-tower reaction device and method for producing monochloroacetone, which is mainly used for the production of monochloroacetone. It belongs to the technical field of chemical equipment. Background technique [0002] Monochloroacetone is mainly used in the production of insecticides and lacrimal agents, and is also an important raw material for the production of medicines, and its uses are extremely extensive. Its conventional production method is as follows: acetone is pre-heated and vaporized, then sent to the reactor for reaction with chlorine gas in a certain ratio, cooled, distilled, and 118-119 fractions are collected. The product by-product HCl is absorbed by water spray, and the by-product hydrochloric acid is produced. The reaction device is a tower reactor. Since there is only one ceramic tower joint at the top of the reactor, the reaction condensation is not sufficient, and the amount of chlorine added is not ...

Claims

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Application Information

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IPC IPC(8): B01J10/00C07C49/16C07C45/63
Inventor 张金华
Owner 江阴市利港第二化工有限公司