http://rdf.ncbi.nlm.nih.gov/pubchem/patent/SU-1039171-A1
Outgoing Links
| Predicate | Object |
|---|---|
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D319-06 |
| filingDate | 1981-11-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1999-12-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1999-12-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | SU-1039171-A1 |
| titleOfInvention | METHOD OF OBTAINING 4,4-DIMETHYL-1,3-DIOXANE |
| abstract | 1. The method of obtaining 4,4-dimethyl-1,3-dioxane by condensation of isobutylene with an aqueous solution of formaldehyde at a temperature of 95 - 98 ° C and a pressure of 1.7 - 2.1 MPa in the presence of oxalic acid as a catalyst, followed by separation of the reaction mixture into an oil and water layers, by evaporation of the water layer by vacuum distillation on a column with an efficiency of 14–15 theoretical plates with a reflux number of 0.2–0.5 with a residual pressure in the column of 133–400 hPa and recirculation of the bottom product to the condensation stage, characterized in that simplification and reductions Lenia process, the distillate by vacuum distillation of the aqueous layer was extracted five times the limit uglevodorodom.2. The method according to claim 1, characterized in that hexane, heptane or octane is used as the limiting hydrocarbon. The method according to claim 1, characterized in that the saturated hydrocarbon is used in a weight ratio to the distillate equal to 1: 1. |
| priorityDate | 1981-11-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 25.