http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S6422832-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6cfc033f059d282fcd915bc8be2ae53f |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C27-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C39-07 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C37-86 |
| filingDate | 1987-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_64f02c01c9710dad226671414554648d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_559aeef129116eba81ad67a21ea9df50 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_76caade112953d58849bb4eda97cce48 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_082e5c66fd898390fb2b4fbe2ae52cab http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b6157aa142e59b063b9c96e0edbb2bea |
| publicationDate | 1989-01-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-S6422832-A |
| titleOfInvention | Purification of high-purity 2,4-xylenol |
| abstract | PURPOSE:To purify the titled high-purity compound, by reacting a xylenol isomer mixture with an aldehyde and while severely controlling consumption of a mineral acid used in condensed reaction and condensation reaction temperature and separating and removing 2,5-xylenol as a condensed product. CONSTITUTION:A xylenol isomer mixture (preferably crude 2,4-xylenol, especially containing 85-95% 2,4-xylenol) containing 2,4-xylenol and 2,5-xylenol is reacted with an aldehyde in the presence of a mineral acid (especially preferably hydrochloric acid or sulfuric acid) of 0.01-2pts.wt., especially 0.10-0.20pt.wt. based on 100pts.wt. xylenol isomer mixture at 0-50 deg.C (especially preferably 10-30 deg.C) to afford 2,5-xylenol as a xylenolaldehyde condensation product, which is then separated from 2,4-xylenol to purify 2,4-xylenol. 0.5-1.5 time mol. aldehyde is preferably used to 1mol. 2,5-xylenol. |
| priorityDate | 1987-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 28.