Title:
How to separate carboxylic acid from water solution
Document Type and Number:
Japanese Patent JP6118338
Kind Code:
B2
Abstract:
A method for manufacturing carboxylic acid that includes the following steps is provided. First, subjecting an aqueous mixture, including carboxylic acid and at least 5 wt. % dissolved magnesium chloride, to a forward extraction step using a first organic liquid, including an organic solvent, the organic solvent being selected from the group of C5+ ketones, thereby obtaining an organic carboxylic acid solution and an aqueous waste liquid including magnesium chloride. Second, subjecting the organic carboxylic acid solution to a back extraction step wherein the carboxylic acid is extracted from the organic carboxylic acid solution into an aqueous liquid, thereby obtaining an aqueous carboxylic acid solution and a second organic liquid. Third, subjecting the aqueous waste liquid including magnesium chloride derived from the forward extraction to a thermal decomposition step at a temperature of at least 300° C., thereby decomposing the magnesium chloride to magnesium oxide and HCl.
Inventors:
De Haan, Andre, Vanier
Van krieken, jean
Decick Jibkovic, Thanja
Van krieken, jean
Decick Jibkovic, Thanja
Application Number:
JP2014548085A
Publication Date:
April 19, 2017
Filing Date:
December 21, 2012
Export Citation:
Assignee:
Purak Biochem B. Buoy.
International Classes:
C07C51/48; C07C55/10; C07C57/13; C07C57/15; C07C59/01; C07C59/06; C07C59/08
Domestic Patent References:
| JP9500649A | ||||
| JP8337552A | ||||
| JP49063659A |
Foreign References:
| WO2000017378A1 | ||||
| US4698303 | ||||
| US2710880 |
Attorney, Agent or Firm:
Mitsuo Matsui
Hiroshi Murakami
Hiroshi Murakami