Phosgene producing method and equipment

一种光气、冷却剂的技术，应用在化学仪器和方法、可持续制造/加工、气候可持续性等方向，能够解决腐蚀等问题

Active Publication Date: 2006-05-03
COVESTRO DEUTSCHLAND AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This reaction between water and phosgene forms hydrochloric acid which leads to further corrosion

Method used

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  • Phosgene producing method and equipment
  • Phosgene producing method and equipment
  • Phosgene producing method and equipment

Examples

Experimental program
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Embodiment Construction

[0020] The feature of the method of the present invention is that the dissipation of the reaction heat of the phosgene production method is realized by evaporative cooling of decompressed water, and the pressure preferably used at this time is lower than atmospheric pressure, and its absolute value is 1 bar.

[0021] From this point of view, the coolant cycle is preferably a closed loop system in which water is evaporated, transferred, condensed at another point, and then recycled to the coolant space for re-evaporation. In this sense, the coolant space in the shell-and-tube reactor preferably contains (at all times) liquid water in boiling state.

[0022] Therefore, the pressure in the reaction space remains greater than the pressure in the coolant space. If the reaction tube is damaged, phosgene will enter the coolant space from the reaction tube, and water will not enter the reaction space from the coolant space (that is, the reaction of the reactor Tube). The coolant spac...

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Abstract

In the production of phosgene by reacting chlorine and carbon monoxide in the presence of an activated charcoal catalyst in a tube aggregate reactor with several reaction tubes surrounded by a coolant chamber, (a) the reaction tubes are cooled externally by evaporation cooling with water in the coolant chamber and (b) the reaction tubes operate at a pressure higher than that in the coolant chamber. An independent claim is also included for the plant used.

Description

[0001] Related patent application cross-reference [0002] This patent application claims priority under 35 U.S.C. §119(a)-(d) to German Patent Application No. 10 2004 041 777.6 filed August 28, 2004. Background of the invention [0003] The present invention relates to a process for the production of phosgene by the reaction of carbon monoxide (CO) and chlorine over activated carbon in a shell-and-tube reactor, wherein the heat of reaction is dissipated by evaporative cooling of reduced-pressure water. The invention also relates to a plant for the manufacture of phosgene comprising a shell-and-tube reactor, a steam / water separator, a heat exchanger (condenser), a sealable vacuum line and at least one device capable of detecting phosgene leakage into the coolant cycle monitoring device. [0004] The production of phosgene from CO and chlorine in shell-and-tube reactors over activated carbon catalysts is known from the prior art. See, for example, Ullmann's Encyclopedia of In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/80
CPCB01J8/0085B01J8/067B01J19/002B01J2208/00221B01J2208/00522B01J2208/00539B01J2208/00849B01J2208/025B01J2219/00268C01B32/80Y02P20/10B01J8/06B01J19/00
Inventor B·柯根霍夫H·洛库姆J·芒尼格
Owner COVESTRO DEUTSCHLAND AG
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