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Method and device for producing chlorobenzyl chloride through continuous rectification

A rectification technology of o-chlorobenzyl chloride, applied in the field of rectification, can solve problems such as low production efficiency, low labor efficiency, and unstable product quality, and achieve the effects of stable product quality, reduced labor intensity, and continuous production

Active Publication Date: 2013-06-26
江苏长海化工有限公司
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  • Abstract
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Problems solved by technology

[0005] The process has the following problems: low production efficiency, unstable product quality, low labor efficiency

Method used

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  • Method and device for producing chlorobenzyl chloride through continuous rectification
  • Method and device for producing chlorobenzyl chloride through continuous rectification

Examples

Experimental program
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Effect test

Embodiment 1

[0022] device such as figure 1 with figure 2 As shown, the chlorinated liquid is first connected to the feed port in the middle of the first rectified tower T-5001 from the middle tank V-5001 of the chlorinated liquid through the feed pump P-5001 of the first rectified tower, and the first rectified tower T- At the bottom of 5001, the first rectification tower reactor R-5001 is connected to the second rectification tower raw material tank V-5002 through the first rectification tower tower discharge pump P-5002, and then through the second rectification tower feed pump P-5002 is connected to the feed port in the middle of the second rectification tower T-5002, and the top of the first rectification tower T-5001 passes through the main condenser of the first rectification tower through E-5001 and the tail condenser of the first rectification tower E-5002 is connected to the front fraction receiving tank V-5002, and the second rectifying column tower tank R-5002 is connected to...

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Abstract

The invention provides a method and a device for preparing an organic compound, belonging to the technical field of rectification. The method comprises the following steps of: feeding a chlorinated product into a first rectifying tower through a middle section, distilling off chlorotoluene through the tower top, and feeding a product at the tower bottom into a second rectifying tower; and feeding the product into the second rectifying tower through the middle section, and obtaining a finished chlorobenzyl chloride product. The device for producing chlorobenzyl chloride through continuous rectification comprises the first rectifying tower and the second rectifying tower; a chlorinated product feeding hole is formed in the middle part of the first rectifying tower; and a discharging hole of a tower kettle is connected to a feeding hole in the middle part of the second rectifying tower. The continuous rectification production process of chlorobenzyl chloride provided by the invention has the advantages of being continuous for production, high in efficiency, steady in finished product quality, high in purity and low in labour intensity.

Description

technical field [0001] The invention provides a method and device for preparing an organic compound, belonging to the technical field of rectification. Background technique [0002] O-chlorobenzyl chloride is an important fine chemical product, which has been widely used in pharmaceutical, pesticide, dyestuff and other industrial sectors. Using o-chlorobenzyl chloride as raw material, a series of intermediates or products with high value can be synthesized. [0003] There are many synthetic routes of o-chlorobenzyl chloride, and the most industrially significant is the side-chain chlorination route of o-chlorotoluene. [0004] Manufacturers generally adopt the synthesis process of chlorination rectification, which mainly uses o-chlorotoluene and chlorine gas as raw materials, and synthesizes o-chlorobenzyl chloride through catalytic chlorination. Chlorobenzyl chloride. [0005] The process has the following problems: low production efficiency, unstable product quality, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C25/02C07C17/383
Inventor 夏建民
Owner 江苏长海化工有限公司
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