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Patent Searching and Data


Title:
PRODUCTION METHOD FOR ACETIC ACID
Document Type and Number:
WIPO Patent Application WO/2018/078924
Kind Code:
A1
Abstract:
Provided is a production method for acetic acid, the method being capable of inhibiting precipitation and accumulation of a catalyst in a vaporization tank, and efficiently recycling the catalyst into a reaction tank, thereby maintaining and improving the productivity of acetic acid, and ensuring stable operation. In the acetic acid production method according to the present invention, the vaporization tank has a catalyst precipitation/accumulation prevention structure (a) and/or (b). Structure (a) is a structure in which the inner wall surface of an inverted-truncated-conical cylindrical linking section of the vaporization tank has a slope angle θ of 5-85°. Structure (b) is a structure which is designed such that a vortex breaker having a plate-shaped vortex breaker body and a leg part for horizontally supporting the vortex breaker body is disposed directly above, so as to cover, a residual liquid flow recycle line linking section of the bottom part of the vaporization tank, and the residual liquid flow passing through a gap between a peripheral portion of the vortex breaker body and an inner bottom surface of the bottom part of the vaporization tank has a linear velocity r of more than 10 m/h.

Inventors:
SHIMIZU MASAHIKO (JP)
Application Number:
PCT/JP2017/019572
Publication Date:
May 03, 2018
Filing Date:
May 25, 2017
Export Citation:
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Assignee:
DAICEL CORP (JP)
International Classes:
C07C51/12; C07C51/44; C07C53/08; C07B61/00
Domestic Patent References:
WO2014115826A12014-07-31
WO2016020410A12016-02-11
Foreign References:
CN201415064Y2010-03-03
CN200984467Y2007-12-05
JP2012532867A2012-12-20
JP2009539932A2009-11-19
JPH05194300A1993-08-03
Other References:
See also references of EP 3333147A1
Attorney, Agent or Firm:
GOTO & CO. (JP)
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