http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-3890895-C2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d8592fb6db0462e8981ef38a4a6846d9 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-89 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-567 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-89 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-567 |
| filingDate | 1988-07-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1997-02-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6a7d793e135cc400e9ca498cfa97f28c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f0cf46e46b5ff02525c31891720a5b06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_974c39e739faa0d6ef681fc77d77ce89 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_29a2ce69588e1557412f576d21fe071d |
| publicationDate | 1997-02-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-3890895-C2 |
| titleOfInvention | Process for the preparation of methyltetrahydrophthalic anhydride |
| abstract | 3-Methyltetrahydrophthalic anhydride is obtd. by a Diels-Alder reaction between maleic anhydride and a 5-carbon fraction in the presence of oxygen and of a radical polymerisation initiator. The 5-carbon fraction is pref. trans-1,3-pentadiene and/or isoprene or mixts. contg. them; the molar ratio of maleic anhydride to five-carbon fraction is pref. 1:1.0-1.5; the temp. of reaction is pref. 40-60 deg.C. The reaction is carried out under 0-10 kg/cm2 gauge pressure. Oxygen is supplied as a gas (e.g. nitrogen) contg. 50 ppm to 8% oxygen and flowing at 0.04-0.8 ml/min. The polymerisation inhibitor may be 2,6-di-tert-butyl-4-methyl phenol; 2,6-dicyclopentyl-4-methylphenol; 2,2'-methylenebis(4 ethyl-6-tert-butylphenol); 4,4'-methylenebis(2,6-di-tert.-butyl phenol); 4,4'-thiobis (3-methyl-6-tert butylphenol); hydroquinone; 4-tert-butylcatechol; p-benzoquinone; butylated hydroxytoluene; iodine; or an organic phosphate ester; pref. at 10-2000 ppm relative to the reactants. |
| priorityDate | 1987-07-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 163.