| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_34fbeb1e614ea098731393cc639cd372 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S203-09 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D3-322
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C7-05
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D3-141 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D3-32
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C7-05 |
| filingDate |
2000-02-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2002-02-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e5e5aa1849ad0ea67442a2dfddebc4d6
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d541754394b4e695b18c571917f8565f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7b7384042aa0df01864187127571d12c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_dae2e322f52f749e4b9e6a85dca58b4a |
| publicationDate |
2002-02-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-6348136-B1 |
| titleOfInvention |
Method and apparatus for the purification of vinyl aromatic compounds |
| abstract |
The present invention is directed to an apparatus and method for the distillation of a readily polymerizable vinyl aromatic compound employing a polymerization inhibitor. The vinyl aromatic compound is subjected to distillation in at least one fractionation column having at least one reboiler for maintaining the bottoms of said column at a proper temperature. The reboiler includes a heating section and a vapor phase section. The bottoms fraction from the fractionation column is cycled to the reboiler and subjected to heat to vaporize at least a portion of the bottoms fraction to form a vapor phase in the vapor section, A slip stream of the bottoms fraction is introduced to the vapor phase section of the reboiler. The slipstream contains polymerization inhibitor that had been added to the process at the fractionation column. The invention reduces fouling at the reboilers. The slipstream is optionally introduced to the reboiler using one or more spray nozzles. The polymerization inhibitor is added to the fractionation column in sufficient amounts to maintain a concentration of at least 400 parts per million by weight in the bottoms fraction. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2008200616-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2011008343-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8771476-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9902667-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2015336859-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2531918-C2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2013134021-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2004019247-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2013233693-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011015462-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2015514564-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10597345-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104159647-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2013233698-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-101955409-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104159647-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-101955409-B |
| priorityDate |
2000-02-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |