Distillation: processes, separatory inventions 05/06

20060108212 - Process for the distillative separation of mixtures of substances: The invention relates to a process for the distillative separation of mixtures of substances, according to the invention the medium boiler and/or high boiler fraction, as the desired product, being freed from low boilers and being obtained directly with the desired composition. In a further aspect, the invention relates to...

20060108213 - Production processes: The present invention involves processes that utilize an olefinic compound, in particular, hexafluoropropene (HFP) or chlorotrifluoroethene (CFC-1113) as extracting agents in the purification of pentafluoroethane (HFC-125). These processes can utilize recovered HFP as a precursor for the production of heptafluoropropane (HFC-227) or other derivatives....

20060096849 - Method for separating butenes and butanes by extractive distillation provided with a polar extraction agent: The invention relates to a process for separating butenes and butanes by extracting with a polar extractant....

20060090994 - Method for purifying caprolactam: A process for purifying crude caprolactam which has been obtained by 1) converting a mixture (I) comprising 6-aminocapronitrile and water to a mixture (II) comprising caprolactam, ammonia, water, high boilers and low boilers in the presence of a catalyst, then 2) removing ammonia from mixture (II) to obtain a mixture...

20060090995 - System and method for carrying out a discontinuous rectification or reaction: The invention is an apparatus and process for batch rectification or reaction with batch distillation. The apparatus is a rectifying column alone or mounted on a batch reactor. The rectifying column having a collector for the downflowing column liquid arranged to collect liquid flowing down the column and a valve...