Patents Assigned to BASF Aktiengesellschart
  • Recycling of ionic liquids produced in extractive distillation
    Patent number: 7485208
    Abstract: Process for working up a bottom stream wherein high boilers and ionic liquid from an extractive rectification in which the ionic liquid is used as entrainer. The process includes feeding the bottom stream to an evaporation stage which is operated at a pressure of less than 500 mbar or to a stripper which is operated through use of inert gas or steam, and the major part of the high boiler present is separated off in vapor form from the ionic liquid.
    Type: Grant
    Filed: July 15, 2004
    Date of Patent: February 3, 2009
    Assignee: BASF Aktiengesellschart
    Inventors: York Alexander Beste, Hartmut Schoenmakers, Wolfgang Arlt, Matthias Seiler, Carsten Jork
  • GLYCOL-FREE AQUEOUS ANTIFREEZE COMPOSITIONS COMPRISING DICARBOXYLIC ACID SALTS
    Publication number: 20080283795
    Abstract: The present invention relates to an aqueous antifreeze composition comprising 10 to 50% by weight of one or more dicarboxylic acids, preferably aliphatic dicarboxylic acids having 4 to 12 carbon atoms in the form of the alkali metal, ammonium or alkaline earth metal salt. Preferably, these salts are used in combination with at least one further substance. This gives antifreeze compositions with a good frost protective action, good heat conductivity and good protection against corrosion.
    Type: Application
    Filed: July 29, 2008
    Publication date: November 20, 2008
    Applicant: BASF Aktiengesellschart
    Inventors: Bernd Wenderoth, Monica Fernandez Gonzalez, Stefan Dambach, Ludwina Machetanz, Uwe Nitzschke