Decreasing The Number Of Carbons In The Compound (e.g., Cracking, Etc.) Patents (Class 570/173)
  • PRODUCING SHORT CHAIN PERFLUOROALKYL IODIDES
    Publication number: 20110301390
    Abstract: An improved process for producing perfluoroalkyl iodides of formula (I) F(CF2CF2)n—I??(I) wherein n is an integer from 2 to 3, wherein the improvement comprises contacting at least one perfluoroalkyl iodide of formula (II) and at least one perfluoroalkyl iodide of formula (III) F(CF2CF2)m—I??(II) F(CF2CF2)p—I??(III) wherein m is an integer greater than or equal to 3, and p is an integer equal to or lower than 2, at a) a molar ratio of formula (III) to formula (II) of from about 1:1 to about 6:1, b) a residence time of from about 1 to about 9 seconds, and c) a temperature of from about 450° C. to about 495° C.
    Type: Application
    Filed: June 8, 2010
    Publication date: December 8, 2011
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Stephen Ernest Jacobson, Sourav Kumar Sengupta, John Joseph Hagedorn, Liza Lopez
  • Process for the preparation of halogenated aromatics
    Patent number: 5306849
    Abstract: Halogenated aromatics are prepared by heating halogenoformic acid esters to 80.degree. to 280.degree. C. in the presence of hydrogen fluoride or a catalytic amount of one or more Lewis acids from the group comprising aluminium halides, iron halides and antimony halides, and in the liquid phase.
    Type: Grant
    Filed: July 28, 1993
    Date of Patent: April 26, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Norbert Lui, Dietmar Bielefeldt, Albrecht Marhold
  • Branched perfluoroalkyl halides and preparation
    Patent number: 5105034
    Abstract: The present invention relates to new perfluoroalkyl halides and to their preparation by a process based on the thermodecomposition of perfluorocarbides in the presence of Cl.sub.2, Br.sub.2 and I.sub.2.
    Type: Grant
    Filed: May 29, 1990
    Date of Patent: April 14, 1992
    Assignee: Ausimont S.r.l.
    Inventors: Claudio Tonelli, Vito Tortelli
  • Branched perfluoroalkyl halides and preparation
    Patent number: 4983780
    Abstract: The present invention relates to new perfluoroalkyl halides and to their preparation by a process based on the thermodecomposition of perfluorocarbides in the presence of Cl.sub.2, Br.sub.2 and I.sub.2.
    Type: Grant
    Filed: September 19, 1989
    Date of Patent: January 8, 1991
    Assignee: Ausimont S.r.l.
    Inventors: Claudio Tonelli, Vito Tortelli
  • Method of manufacturing perfluoromethane and perfluoroethane
    Patent number: 4365102
    Abstract: A method of manufacturing CF.sub.4 and/or C.sub.2 F.sub.6 characterized by employing a mixed gas of tetrafluoroethylene and carbon dioxide at a mol ratio of less than 4:1 and heating it to a temperature exceeding 900.degree. C.
    Type: Grant
    Filed: September 29, 1980
    Date of Patent: December 21, 1982
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Maurice J. Couture, Dan Hayashi