Method for producing carbonyl chloride

A manufacturing method, phosgene technology, applied in the direction of carbonyl chloride, etc., can solve problems such as the method has not been made public

Inactive Publication Date: 2011-06-08
TEIJIN KASEK KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Any one of the schemes in the above-mentioned patent documents is recorded from a short-term perspective for the improvement of phosgene quality, and the method for long-term continuous industrial production of high-quality phosgene has not yet been disclosed.

Method used

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  • Method for producing carbonyl chloride
  • Method for producing carbonyl chloride
  • Method for producing carbonyl chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0162] (manufacture of phosgene)

[0163] Set up the first reaction tank, which has the function of removing the reaction heat of the multi-tube reaction tank shell side with 40 ° C cooling water for water, filling the specific surface area of ​​400m on the tube side 2 / g, coconut shell activated carbon (first catalyst) with an average particle diameter of 2.5mm.

[0164] The second reaction tank is installed on the downstream side of the first reaction tank, and the shell side of the multi-tubular reaction tank with the function of removing reaction heat is passed through with cooling water at 40°C, and the specific surface area of ​​the tube side is 900m2. 2 / g, the coconut shell activated carbon (second catalyst) of average particle size 3.5mm.

[0165] On the downstream side of the second reaction tank, a condenser and a liquefied phosgene storage tank are arranged next to a -25°C brine.

[0166] These devices are connected in series, starting from the first reaction tan...

Embodiment 2

[0174] Phosgene and polycarbonate resin particles were obtained in the same manner as in Example 1, except that the filling volume ratio of the first catalyst and the second catalyst was changed to 9.1 / 0.9. Table 1 shows the evaluation results of the obtained phosgene and polycarbonate resin. Similarly, Table 2 shows the evaluation results of phosgene and polycarbonate resin after long-term operation.

Embodiment 3

[0176] Phosgene and polycarbonate resin particles were obtained in the same manner as in Example 1 except that the filling volume ratio of the first catalyst and the second catalyst was changed to 3.3 / 6.7. Table 1 shows the evaluation results of the obtained phosgene and polycarbonate resin. Similarly, Table 2 shows the evaluation results of phosgene and polycarbonate resin after long-term operation.

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Abstract

Provided are a method for producing carbonyl chloride which has few impurities and a good hue, and a method for producing polycarbonate resins which contain little metal-corroding material, have an excellent hue, and have excellent thermal stability when moulded. The method for producing carbonyl chloride containing small amounts of carbon tetrachloride, molecular chlorine and molecular bromine includes a process (i) wherein chlorine and carbon monoxide are brought into contact with a first catalyst having a specific surface area of 200 to 800 m2 / g and a second process (ii) wherein the product obtained in (i) is brought into contact with a second catalyst having a specific surface area of 800 to 1,500 m2 / g. A method for producing polycarbonate resin using the carbonyl chloride obtained is also included.

Description

technical field [0001] The present invention relates to a method for producing phosgene. Moreover, this invention relates to the manufacturing method of the polycarbonate resin using the obtained phosgene. Background technique [0002] Polycarbonate resins have been widely used in food fields, optical fields such as multimedia recording media, storage containers such as silicon wafers and multimedia recording media, electric power and automobiles due to their excellent optical properties, mechanical properties, and electrical properties. field etc. [0003] As is known to all, polycarbonate resins are usually manufactured using phosgene as a raw material, but by-products and impurities contained in the phosgene will affect the quality of polycarbonate resins. [0004] For example, Patent Document 1 discloses a method of producing phosgene using carbon monoxide in which a sulfur compound has been reduced, and further producing a polycarbonate resin having a good color tone ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/28C08G64/28C01B32/80
CPCC01B31/28C08G64/28C01B32/80
Inventor 仓垣雅弘金行伸一郎水野琢也
Owner TEIJIN KASEK KK
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