http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-313234-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_798f3caa292684e1560945c2ba4126a8 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-56 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-56 |
| filingDate | 1928-03-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1929-06-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-313234-A |
| titleOfInvention | Manufacture of anhydrides of alkoxy aliphatic acids |
| abstract | 313,234. Dreyfus, H. March 24, 1928. Alkoxy aliphatic anhydrides.-Alkoxy aliphatic anhydrides or their substitution products are prepared bv bringing metallic salts of the corresponding acids or mixtures thereof into reaction with phosgene or substances' yielding phosgene, such as sulphur trioxide and carbon tetrachloride. Preferably, the anhydrous pulverulent alkali-metal salts are employed and the reaction is conducted in an inert medium, advantageously in the anhydride to be produced: the process may then be conducted continuously. When the anhydrides contain traces of sulphur, they may be purified by treatment with suitable metals or metal compounds, such as lead oxide or copper oxide, or by treatment with chlorine and a metal salt of the acid corresponding to the anhydride. In the example, dry powdered sodium methoxyacetate mixed with methoxyacetic anhydride is treated with phosgene, preferably at a temperture below 10‹ C. ; the product is distilled in vacuo when the reaction is complete. Reference is made also to the preparation of anhydrides from the ethyl and propyl ethers of glycollic acid and the methyl, ethyl and propyl ethers of lactic and hydracrylic acids. Specifications 313,233 and 313,235 are referred to. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4874558-A |
| priorityDate | 1928-03-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 35.