http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2001519409-A
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-584 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-14 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C41-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C43-215 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C59-64 |
| filingDate | 1998-10-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2001-10-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-2001519409-A |
| titleOfInvention | Recovery and recycling of catalyst components used in palladium catalyzed production of aryl carboxylic acids |
| abstract | (57) [Summary]nAryl carboxylic acids, especially polycyclic aryl carboxylic acids, are separated from the remaining catalyst components by use of a phase separation step. This avoids the need to use vacuum distillation with its attendant high investment and operating costs. Also, the phase separation step provides an organic soluble catalyst residue that is active for reuse via recirculation without the need for catalyst regeneration. Thus, the aryl olefin is reacted with carbon monoxide and water in the presence of a palladium catalyst and an organic phosphine ligand to form a reaction mass comprising (a) an aryl carboxylic acid and (b) the remaining catalytic species. . The reaction mass is treated with an aqueous inorganic base to form (i) an aqueous phase containing a dissolved water-soluble salt of an aryl carboxylic acid and (ii) an organic phase containing dissolved residual catalyst species. The phases are separated and at least a portion of the separated phase (ii) is recycled for use in performing additional reactions. Often, in addition to phases (i) and (ii), there are solid phases containing a portion of the palladium catalytic value present, and preferably these solid phases are recovered (eg, by filtration) and recycled for recycling. If not sufficiently catalytically active, at least a portion is converted to an active palladium catalyst component for use in subsequent reactions. The phase separation thus allows the separation of the catalyst residue in the form of an organic solution and as a solid, while concomitantly isolating the desired product in the form of an aqueous solution. |
| priorityDate | 1997-10-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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