Process for producing glutamic acid
US6147259A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Oct 7, 1998 |
| Grant date | Nov 14, 2000 |
| Priority date | — |
| Expiry date | Oct 7, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C227/28
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An indirect acidulation process for producing glutamic acid from an aqueous feed containing a glutamate resulting from fermentation includes: a) contacting an aqueous feed stream at an elevated temperature with a weak acid cation exchanger (WACE) which is at least partially in its acid form, whereby a part of the cations in the solution is taken up by the cation exchanger and protons are introduced into the solution; b) contacting a second aqueous feed containing glutamate and cations at an elevated temperature with a strong acid cation exchanger (SACE) that is obtained from a subsequent step and carries cationic glutamate, whereby the cationic glutamate is transferred into the solution and most of the cations in the second aqueous feed are taken up by the SACE; c) crystallizing glutamic acid from the effluent of step (b); d) contacting the mother liquor of step (c) with the SACE which is at least partially in its acid form whereby cationic glutamate is bound; e) utilizing the SACE obtained in step (d) in step (b); f) regenerating the SACE from step (b) to its at least partially acid form by a solution of a strong acid and utilizing the SACE in its at least partially acid form in s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.