Title:
酸触媒を回収して再循環させる方法
Document Type and Number:
Japanese Patent JP5795639
Kind Code:
B2
Abstract:
Disclosed is a process for the extractive recovery of an acid catalyst from an aqueous mixture of glycolic acid with an extraction solvent comprising a tertiary amine or an onium carboxylate compound, a modifier, and a diluent. The acid catalyst, which can comprise strong acids such as sulfuric acid, alkyl sulfonic acids, and fluoroalkyl sulfonic acids, can be recovered by back extraction with aqueous formaldehyde and recycled to a process for the preparation of glycolic acid by the acid-catalyzed carbonylation of formaldehyde.
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Inventors:
Scott Donald Bernicki
Stephen Neil Falling
Jeffrey Scott Cannel
Robert Sterling Klein
Peter Bowden Mackenzie
Stephen Neil Falling
Jeffrey Scott Cannel
Robert Sterling Klein
Peter Bowden Mackenzie
Application Number:
JP2013530190A
Publication Date:
October 14, 2015
Filing Date:
September 14, 2011
Export Citation:
Assignee:
EASTMAN CHEMICAL COMPANY
International Classes:
B01J38/00
Domestic Patent References:
| JP6343873A | ||||
| JP4049262A | ||||
| JP61076434A |
Foreign References:
| US20060160197 |
Attorney, Agent or Firm:
Atsushi Aoki
Takashi Ishida
Fukumoto product
Tetsuji Koga
Kazuhiro Nakamura
Yoichi Watanabe
Ryotaro Takei
Takashi Ishida
Fukumoto product
Tetsuji Koga
Kazuhiro Nakamura
Yoichi Watanabe
Ryotaro Takei