http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-727013-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ac40ffdd0f9b7563bab9d5dccaa8a6b3 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B37-0024 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C29-92 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B37-0084 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08B37-12 |
| filingDate | 1949-11-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_61ff29ab34c92595ddd44b17d3e5bdbf http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fdd3341aefcb605f14804d59eaafe08b |
| publicationDate | 1955-03-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-727013-A |
| titleOfInvention | An improved process for the extraction of mannitol, laminarin and alginic acid from seaweed |
| abstract | Mannitol is extracted from seaweed by a process comprising treating seaweed with a solvent which dissolves mannitol, inorganic salts and laminarin, separating the seaweed residue and laminarin from the solution, evaporating the remaining solution to dryness under reduced pressure to leave a mixture of mannitol and inorganic salts, converting the mannitol of the mixture into a water-insoluble compound of mannitol by methods known to be capable of converting alcohols into acetals, ketals or esters, washing with water to remove salts and recovering mannitol from said compound of mannitol. When a dilute mineral acid is employed as solvent the seaweed residue is treated with a basic solution to recover alginic acid and laminarin is precipitated from the acidic solution by the addition of alcohol. The solution is neutralized and evaporated under reduced pressure to leave a mixture of mannitol and salts the mannitol in which is converted into a water-insoluble organic compound such as the acetal, ketal or ester by treatment with the appropriate aliphatic aldehyde, ketone or acid anhydride. The insoluble compound is then freed from salts by washing with water. The insoluble compound may be decomposed, e.g. by hydrolysis by means of dilute acid. The alginic acid may be recovered from the seaweed residue by treatment with hydroxide or alkali metal carbonate in known manner. Seaweeds mentioned are L. cloustoni, L. digitata and L. saccharina. In examples: L. cloustoni fronds are extracted with dilute hydrochloric acid in the presence of formalin. The weed residue is removed and after standing laminarin is deposited and is removed. The solution is then neutralized with caustic soda and evaporated under reduced pressure and alcohol is added to the viscous solution to precipitate further laminarin, fucoidin and salts which are removed. The solution is evaporated to dryness under reduced pressure. A portion of the mixture of mannitol and salts is added to hydrochloric acid and paraldehyde to form triethylidene mannitol which is filtered and washed with water (1); a further portion is treated with anhydrous acetone and sulphuric acid and the mixture is neutralized and evaporated under reduced pressure to give triacetone mannitol (2); and a further portion of the mixture obtained in (1) is heated with acetic anhydride and sodium acetate to obtain the hexa-acetate. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2023002252-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104311698-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/NL-2009482-C2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104311698-B |
| priorityDate | 1949-11-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 54.