http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H07206717-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_03627f82d4edc6567f9627df6efdde5d |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D3-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D3-322 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D317-12 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D3-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D3-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B63-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D317-12 |
| filingDate | 1994-03-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a038301592fc37ba64eb211f89363012 |
| publicationDate | 1995-08-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H07206717-A |
| titleOfInvention | Purification method of cyclic formal |
| abstract | (57) [Summary] [Object] To provide a purification method for efficiently removing water from a mixture of cyclic formal and water, which is difficult to separate water, to obtain a highly pure cyclic formal having extremely low water content. [Structure] A method for purifying cyclic formal, which comprises using the following first purification step (1) and second purification step (2). (1) A mixture containing cyclic formal and water is supplied to a distillation column, and a hydrophilic solvent (A) having a boiling point in the range of 180 to 250 ° C. is supplied above the supply position of the mixture in the distillation column. And then distilled to a water content of 1 First purification step (2) of extracting cyclic formal (X) in the range of 00 ppm to 5000 ppm as a distillate (2) The cyclic formal (X) obtained in the first purification step is further treated with distillation or a dehydrating agent, and Second purification step for obtaining cyclic formal (Y) having a reduced water content than cyclic formal (X) |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2012224584-A |
| priorityDate | 1994-01-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 47.