Method and installation for the crystallization of gluconodeltalactone
US4877889A · kind A · utility
0Cited by
0References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 6, 1988 |
| Grant date | Oct 31, 1989 |
| Priority date | — |
| Expiry date | Sep 6, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D309/30
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A gluconic acid syrup is introduced into a first crystallization zone 1a which it is brought to traverse under stirring and inside which it is maintained at a constant temperature, the mixture syrup and the gluconodeltalactone crystals emerging from this first zone being brought to traverse a second crystallization zone 1b within which it is subjected firstly to a temperature gradient decreasing globally, possibly modulated then to a substantially constant temperature, the mixture emerging from this second zone being in the form of a crystalline mass rich in gluconodeltalactone crystals from which the latter are recovered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.