METHOD AND APPARATUS FOR CARBONYLATING METHANOL WITH ACETIC ACID ENRICHED FLASH STREAM

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United States of America Patent

APP PUB NO 20190062249A1
SERIAL NO

16170781

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Abstract

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A carbonylation process for producing acetic acid including: (a) carbonylating methanol or its reactive derivatives in the presence of a Group VIII metal catalyst and methyl iodide promoter to produce a liquid reaction mixture including acetic acid, water, methyl acetate and methyl iodide; (b) feeding the liquid reaction mixture at a feed temperature to a flash vessel which is maintained at a reduced pressure; (c) heating the flash vessel while concurrently flashing the reaction mixture to produce a crude product vapor stream, wherein the reaction mixture is selected and the flow rate of the reaction mixture fed to the flash vessel as well as the amount of heat supplied to the flash vessel is controlled such that the temperature of the crude product vapor stream is maintained at a temperature less than 90° F. cooler than the feed temperature of the liquid reaction mixture to the flasher and the concentration of acetic acid in the crude product vapor stream is greater than 70% by weight of the crude product vapor stream.

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Patent Owner(s)

Patent OwnerAddress
CELANESE INTERNATIONAL CORPORATION222 W LAS COLINAS BLVD SUITE 900N IRVING TX 75039

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
PATT, Jeremy J Lake Jackson, US 16 388

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