http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2303784-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d9cb217f83556ce2a418344c2d485415 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J27-1802 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J27-18 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J27-18 |
| filingDate | 1976-03-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1976-10-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | FR-2303784-A1 |
| titleOfInvention | PROCESS FOR THE PREPARATION OF DIPHENOL MONOALCOYL ETHERS |
| abstract | Bivalent phenol (opt. substd. with 1-4C lower alkyl or halogen, e.g. catechol, hydroquinone, resorcin, etc.) is subjected to etherification with a lower alcohol (straight-chained or branched aliphatic lower alcohol of 1-4C, e.g. methanol, ethanol, isobutano, etc.) in the presence of a catalyst consisting of aluminium and phosphor in a gaseous phase, and by the addn. of a very small amt. of boron phosphate (30-500 p.p.m. relative to the mixt. soln. of bivalent phenol and alcohol), not only is it possible to prevent the formation of a tar-like substance to some extent but also to maintain a high catalytic activity and selectivity for a long period of time, which is very advantageous on an industrial scale. For example, in the prodn. of guaiacol, the selectivity of veratrol, whose b.pt. is very similar to that of guaiacol (the difference is 1-2 degrees C), which cannot be sepd. by distillation, is not higher than 1%, thus this is very advantageous from the viewpoint of sepn. and purificn. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0420756-A2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0420756-A3 |
| priorityDate | 1975-03-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 34.