http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-H604-H
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C43-315 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C43-317 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C43-315 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C43-317 |
| filingDate | 1988-07-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1989-03-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1989-03-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-H604-H |
| titleOfInvention | Method of preparing 2,4,4,5,5,6,6-heptafluoro-2-trifluoromethyl-3-oxaheptane-1,7-diol polyformal |
| abstract | A process for preparing 1,4,4,5,5,6,6-heptafluoro-2-trifluoro-3-oxaheptan,7-diol polyformal by the following steps in order: n (1) reacting 2,4,4,5,5,6,6-heptafluoro-2-trifluoromethyl-3-oxaheptane-1,7-diol with formaldehyde in 80-90% (w/w) sulfuric acid in the presence of methylene chloride to produce 2,4,4,5,5,6,6-heptafluoro-2-trifluoromethyl-3-oxaheptane-1,7-diol polyformal; n (2) treating the reaction mixture with aqueous H 2 O 2 to destroy free formaldehyde; n (3) removing methylene chloride from the reaction mixture; n (4) extracting the product 2,4,4,5,5,6,6-heptafluoro-2-trifluoromethyl-3-oxaheptane-1,7-diol polyformal from the reaction mixture with ether; n (5) agitating the ether extract with an aqueous solution of (a) H 2 O 2 , (b) KOH or NaOH, and (c) NaCl or KCl to convert hemiformal end groups into hydroxy end groups; and n (6) isolating the product 2,4,4,5,5,6,6-heptafluoro-2-trifluoromethyl-3-oxaheptane-1,7-diol polyformal. |
| priorityDate | 1988-07-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 38.