PROCESS FOR PRODUCING ACETIC ACID

Title:

PROCESS FOR PRODUCING ACETIC ACID

Document Type and Number:

WIPO Patent Application WO/2016/194850

Kind Code:

A1

Abstract:

Provided is a process for producing acetic acid by efficiently separating permanganic-acid reducing substances (PRC's) and methyl iodide. A mixture (3A) containing PRC's and methyl iodide is distilled in a distillation step (5) to separate the mixture into an overhead stream (5A), a side-cut stream (5B), and a bottom stream (5C), thereby separating or removing the PRC's from the mixture. In the distillation step (5), an extractant (water, etc.) capable of extracting the PRC's preferentially to methyl iodide is added to a concentration region where the PRC's and methyl iodide are concentrated in the distillation tower, and an extract descending from the concentration region is withdrawn as the side-cut stream (5B).

More Like This:

JP5781151	Azeotropic composition of 2,3-dichloro-3,3-difluoropropene (HCFO-1232xf) and hydrogen fluoride (HF)
JPWO2015045927	Separation method of hexafluoropropene and fluorine-containing compound
JP2011513227	Method for separating 2,3,3,3-tetrafluoropropene from hydrogen fluoride by azeotropic distillation

Inventors:

SHIMIZU MASAHIKO (JP)
MIURA HIROYUKI (JP)
MIZUTANI YOSHIHISA (JP)

Application Number:

PCT/JP2016/065822

Publication Date:

December 08, 2016

Filing Date:

May 27, 2016

Export Citation:

Click for automatic bibliography generation Help

Assignee:

DAICEL CORP (JP)

International Classes:

C07C17/386; C07C19/07; C07C51/12; C07C51/44; C07C53/08; C07B61/00

Foreign References:

JP2003518053A	2003-06-03
JPH0867650A	1996-03-12
JP2001096102A	2001-04-10

Other References: