Process for separation and purification of a dicarboxylic acid containing mixture
US11453636B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2018 |
| Grant date | Sep 27, 2022 |
| Priority date | — |
| Expiry date | Jun 19, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D15/1821
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method is provided for separating a dicarboxylic acid product from a mixture containing such dicarboxylic acids. The method involves: providing a dicarboxylic acid-containing mixture of which at least 35% of the carboxylic acid content of the mixture is a dicarboxylic acid product of interest; running an extraction of said dicarboxylic acid-containing mixture through a chromatographic column configured with an amphoteric resin, such that the dicarboxylic acid product elutes preferentially from the dicarboxylic acid-containing mixture. In certain embodiments, the dicarboxylic acid product of interest can be a glucaric or gluconic acid product from a mixture of either or both of these with still other carboxylic acids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.