http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1003699-B1

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classificationCPCInventive http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D3-40
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D3-322
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C17-386
classificationIPCInventive http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D3-40
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D3-32
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C17-386
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C19-08
filingDate 1998-08-12-04:00^^<http://www.w3.org/2001/XMLSchema#date>
grantDate 2003-10-22-04:00^^<http://www.w3.org/2001/XMLSchema#date>
inventor http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d616be3c82a86bb95ee9696b445dfd69
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_97cf7187653c63703ba920a467cda4df
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_722a17f4733a96e03e30e6db517f76a9
publicationDate 2003-10-22-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber EP-1003699-B1
titleOfInvention Purification of difluoromethane by extractive distillation
abstract The present invention provides extractive distillation processes for removing difluoromethane (HFC-32) from a mixture comprising HFC-32 and at least one of chlorodifluoromethane (CFC-12), 1,1,1-trifluoroethane (HFC-143a), chloropentafluoroethane (CFC-115), and pentafluoroethane (HFC-125) using hydrocarbon, chlorocarbon, and oxygen-containing extractive agents.
priorityDate 1997-08-12-04:00^^<http://www.w3.org/2001/XMLSchema#date>
type http://data.epo.org/linked-data/def/patent/Publication

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