| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_95585944cd76ddfb6dc33ed2a0b84403 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2531-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J2231-347 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J31-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C37-20 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J31-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J31-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C37-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C39-16 |
| filingDate |
2002-08-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2005-09-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_92046d7a7962a01a2f66e064ff22bc43
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_826c3fd8f62fa706c624a6187f2c61d1 |
| publicationDate |
2005-09-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-6943273-B2 |
| titleOfInvention |
Method for producing bisphenol-A |
| abstract |
Provided is a process for producing a bisphenol A by continuously feeding phenol and acetone into a reactor unit having at least two reaction zones connected in series. In the process, an acidic cation-exchange resin partially neutralized with a sulfur-containing nitrogen compound in from 15 to 50% of the acid site thereof is used as the catalyst, and acetone having a methanol concentration of at most 3,000 ppm is separately fed into at least two reaction zones in the reactor unit. The life of the acidic cation-exchange resin catalyst used in the process is prolonged. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8143456-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7129382-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011137087-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2004192975-A1 |
| priorityDate |
2001-08-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |