http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2002088271-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_69309554ff879fdc1b15a09d0fa4a5b3 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B67-54 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D493-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B11-28 |
| filingDate | 2000-09-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ee7b959d08ff5d9ec26f556a75d35bcd |
| publicationDate | 2002-03-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-2002088271-A |
| titleOfInvention | Method for separating and separating fluoran compound crystals |
| abstract | (57) [Summary] [PROBLEMS] To provide a method for separating and separating a fluoran compound as a large crystal. When a fluoran compound represented by the general formula (1) formed in toluene of a reaction system is precipitated and separated from a toluene solution as crystals, a toluene solution at 65 to 85 ° C. in a state where the fluoran compound is dissolved in a supersaturated state. And the seed solution is added to the toluene solution to maintain the same temperature. Subsequently, toluene is distilled off under reduced pressure at 65 to 85 ° C., and then the toluene solution is cooled, and the precipitated crystals are separated by filtration. A method for separating and separating fluoran compound crystals. In the formula, R1 and R2 represent an ethyl group or a tolyl group, R3 represents a hydrogen atom or a methyl group, and R4 represents a hydrogen atom or a trifluoromethyl group. |
| priorityDate | 2000-09-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 21.