Process for producing agar-agar from an algae extraction juice
US4780534A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1986 |
| Grant date | Oct 25, 1988 |
| Priority date | — |
| Expiry date | Jul 7, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08B37/0039
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for making agar-agar from algae extraction juices and comprising: (a) placing the extraction juice in the presence of a cationic ion exchange resin conditioned into the Na.sup.+ form, then placing it (b) in the presence of an anion exchange resin conditioned into the Cl.sup.- and/or SO.sup.--.sub.4 form, then (c) optionally placing the juice in the presence of a cation ion exchange resin conditioned into the OH.sup.- form, (d) thereupon gelling the juice, (e) extracting the agar-agar from the obtained gel, and where called for (f) treating the obtained powder by placing it in contact with an ozone-loaded carrier gas. Such a process allows producing at reduced costs high-grade agar-agar, useful in particular in the medical, pharmaceutical and bioengineering fields.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.