Predicate |
Object |
classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J2231-347 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2531-08 |
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/C07C39-16 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/C07B61-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C37-20 |
filingDate |
2002-08-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c3d659346511665fd9ce64cdd1e84210 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4dd498dfd2bfb7767e0a12ed86790c9d |
publicationDate |
2004-02-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
publicationNumber |
US-2004030196-A1 |
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-2004116751-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2005177007-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10364213-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2006008230-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2005004406-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7078573-B2 |
priorityDate |
2001-08-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
type |
http://data.epo.org/linked-data/def/patent/Publication |