[12] Patent
[11] Patent No.:GC0009231  
[45] Date of Publishing the Grant of the Patent: 31/Dec /2018                56/2018  
Number of the Decision to Grant the Patent:2018/140686
Date of the Decision to Grant the Patent:02/Dec/2018

[21] Application No.:GCC/P/2009/13371

[22] Filing Date:28/4/2009

[30] Priority:

[33] State [32] Priority date [31] Priority No.
US
29/4/2008
12/150,481

[72] Inventor: Jeremy J. PATT

[73] Owner: Celanese International Corporation, 1601 West LBJ Freeway, Dallas, Texas 75234, USA

[74] Agent: Kadasa Law Firm

  

 

  

[51]IPC:
Int. Cl.: B01J 8/00; C07C 51/12 (2006.01)

[56] Cited Documents:

-US 6114 576 A (LEET NILLIAM A [US]; KULPRATHIPANJA SANTI [US]; BRIGGS BRUCE A [US]) 05 September 2000
-EP 0768295 A1 (DAICEL CHEM [JP]) 16 Apri1 1997
-US 6153792 A (LEET WILLIAM A [US]; KULPRATHIPANJA SANTI [US]) 28 November 2000
 
Examiner: Eng. Abdulaziz S. AlMotek

[54] METHOD AND APPARATUS FOR CARBONYLATING METHANOL WITH ACETIC ACID ENRICHED FLASH STREAM
[57] Abstract: 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.
No. of claims: 21     No. of figures: 8


 

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