Acid/salt separation
US9061986B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2012 |
| Grant date | Jun 23, 2015 |
| Priority date | — |
| Expiry date | Aug 16, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D307/68
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for preparing a carboxylic acid, includes the steps of: providing magnesium carboxylate, wherein the carboxylic acid corresponding with the carboxylate is selected from the group made of 2,5-furandicarboxylic acid, fumaric acid, adipic acid, itaconic acid, citric acid, glutaric acid, maleic acid, malonic acid, oxalic acid and fatty acids having more than 10 carbon atoms; acidifying the magnesium carboxylate with hydrogen chloride (HCl), thereby obtaining a solution including carboxylic acid and magnesium chloride (MgCl2); optionally a concentration step, wherein the solution including carboxylic acid and MgCl2 is concentrated; and precipitating the carboxylic acid from the solution including the carboxylic acid and MgCl2, thereby obtaining a carboxylic acid precipitate and a MgCl2 solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.