| Predicate |
Object |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-10 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D3-009
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-567
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-56 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B41-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D3-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-567
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-56
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B31-00 |
| filingDate |
1979-03-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate |
1979-10-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0004641-A3 |
| titleOfInvention |
Process for preparing carboxylic anhydrides |
| abstract |
The invention relates to a method for exhaust andnwastewater-free production of carboxylic acid anhydrides such asnBenzoic anhydride and pivalic anhydride from thencorresponding carboxylic acids and acetic anhydride. ThenAccording to the invention, the reaction is carried out at normal pressurenor reduced pressure continuously or discontinuouslynoperated reaction distillation apparatusnwith simultaneous separation of the reaction productsnCarboxylic anhydride and acetic acid performed. |
| priorityDate |
1978-04-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |