Patents Assigned to SFR Limited
  • Process for the production of difluoromethane
    Patent number: 6723887
    Abstract: A process for vapor phase fluorination of methylene chloride with anhydrous hydrogen fluoride (AHF) in the presence of a coprecipitated chromia-alumina impregnated with zinc salt as catalyst, removing HCl and heavier components by distillation, subjecting HFC-32 rich cut to a further step of fluorination in the presence of a fluorination catalyst.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: April 20, 2004
    Assignee: SFR Limited
    Inventors: Rajasekaran Ramanathan, Rajdeep Anand, Anurag Jain, Jampani Madhusudana Rao