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Phosgene production device and method

A carbonyl chloride and equipment technology, applied in the field of carbonyl chloride preparation, can solve the undisclosed problems of long-term continuous industrial production of carbonyl chloride, large gas pressure loss, large-scale implementation process, etc., to achieve simple implementation process and reduce loss , Guarantee the effect of production quality and production safety

Inactive Publication Date: 2016-02-24
LIAOCHENG LUXI POLYCARBONATE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, to implement these methods, there are problems such as complicated equipment, large-scale and cumbersome implementation process, large loss of gas pressure, and high cost.
[0007] The prior art scheme has not yet disclosed the method for long-term continuous industrial production of high-quality carbonyl chloride

Method used

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  • Phosgene production device and method
  • Phosgene production device and method
  • Phosgene production device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0040] like figure 1 and figure 2 As shown, a device for producing phosgene includes a reactor shell 11, and the reactor shell 11 is provided with a primary reactor 1 and a secondary reactor 2. The upper end of the primary reactor 1 is connected with the raw material inlet 3 through the head 2, and the lower end is connected with the secondary reactor 4 through the connection section, and the other end of the secondary reactor 4 is connected with a phosgene outlet 26.

[0041] A tube-and-tube reaction tube bundle is arranged vertically in the primary reactor 1 , and the reaction tube bundle is composed of a plurality of reaction tubes 5 . The shell of the secondary reactor 4 is provided with a main body of the reaction zone, and the reaction tube 5 and the main part of the reaction zone of the secondary reactor 4 are filled with a fixed-bed catalyst 6 . For a clearer illustration, in figure 1 Only one reaction tube 5 is shown schematically.

[0042] The reactor housing 11...

Embodiment 2

[0059] Example 2 uses the same equipment as Example 1. In the method according to the present invention, the molar ratio of the raw materials CO and chlorine used is 1.07-1.10, and the residual chlorine is 40-60 ppm. The absolute pressure of the mixed gas is 0.48Mpa~0.52Mpa.

[0060] By properly selecting the coolant pressure and coolant temperature, the outlet product temperature is 65-80°C. The primary reactor 1 is cooled by means of the cooling chamber 14 and the loop, and the phosgene leaves the primary reactor 1 at a temperature of 80-90°C.

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Abstract

The present invention discloses a phosgene production device and method. The phosgene production device is a dividing wall type heat exchange type spring supported catalyst two-stage reaction synthesis device, and is used for phosgene production by reaction of chlorine and carbon monoxide in the role of a catalyst. The phosgene production device comprises a reactor casing, the reactor casing is internally provided with a primary reactor and a secondary reactor, the lower end of the primary reactor is connected with the secondary reactor by a connecting section, a multitubular-type reaction tube bundle is vertically arranged within the primary reactor, and comprises a plurality of reaction tubes; a secondary reactor casing is internally provided with a reaction zone main body, the reaction tubes and the secondary reactor reaction zone main body are partly filled with a fixed bed catalyst; the reactor casing is internally provided with a protective detection chambers, the protective detection chamber is internally provided with phosgene, chlorine and carbon monoxide detectors for detecting gas leakage. A gas detection warning instrument is arranged outside the reactor casing. The phosgene production device and method has the advantages of complete reaction, reduction of catalyst content in the finished product, lower cost, more security and the like.

Description

technical field [0001] The invention relates to a device and a method for producing carbonyl chloride through the reaction of chlorine and carbon monoxide by using a fixed-bed catalyst, and belongs to the technical field of carbonyl chloride preparation. Background technique [0002] Polycarbonate resin is widely used in building materials due to its excellent properties such as high strength, good light transmission, low molding shrinkage, good fatigue resistance, good weather resistance, excellent electrical properties, tasteless, odorless, and harmless to the human body. industry, automobile manufacturing and medical equipment, etc. As we all know, polycarbonate resin is usually prepared industrially using phosgene as a raw material, but the unreacted raw materials contained in phosgene and the catalyst carried out will affect the quality of polycarbonate resin. [0003] Though the method of existing industrial production phosgene is very ripe,, in view of raw material c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/28C01B32/80
Inventor 董宝田牛军柳长春焦衍冲张新唐文明
Owner LIAOCHENG LUXI POLYCARBONATE CO LTD
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