Process for the preparation of monosodium glutamate
US5907059A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Feb 10, 1998 |
| Grant date | May 25, 1999 |
| Priority date | — |
| Expiry date | Feb 10, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12P13/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention provides a process for the preparation of monosodium glutamate from a fermentatively prepared solution containing monoammonium glutamate, the process comprising: a) contacting the solution containing monoammonium glutamate salt with a basic anion exchange resin of at least medium strength to split the salt, whereby glutamate anions attach to the anion exchanger and ammonia is released in the solution; b) subjecting the ammonia-containing solution to distillation, to recover volatile ammonia therefrom; c) contacting the glutamate-containing anion exchange resin with a sodium base solution to regenerate the basic anion exchanger and to directly form monosodium glutamate salt in solution; and d) crystallizing monosodium glutamate salt directly from the monosodium glutamate-containing solution, wherein the crystallized salt has a purity of at least 98%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.