Ketene Reactant Patents (Class 562/858)
  • Distillation process comprising at least two distillation steps to obtain purified halogenated carboxylic acid halide, and use of the purified halogenated carboxylic acid halide
    Patent number: 10017452
    Abstract: The present invention concerns a process for the obtention of a halogenated carboxylic halide having a reduced content of impurities, a fraction of the halogenated carboxylic halide having a reduced content of impurities, and its use in the manufacture of agriculturally and pharmaceutically active compounds.
    Type: Grant
    Filed: August 13, 2015
    Date of Patent: July 10, 2018
    Assignee: SOLVAY SA
    Inventor: Max Josef Braun
  • Process for the Production of 4-Chloroacetoacetyl Chloride, 4-Chloroacetoacetic Acid Esters, Amides and Imides
    Publication number: 20140039217
    Abstract: The invention relates to process for the continuous production of 4-chloroacetoacetyl chloride, comprising the steps of (a) feeding diketene and chlorine into a thin film reactor and (b) reacting the diketene and chlorine to obtain 4-chloroacetoacetyl chloride. The invention also relates to a process for the production of 4-chloroacetoaceticacid ester, 4-chloroacetoaceticacid amide or 4-chloroacetoaceticacid imide from 4-chloroacetoacetyl chloride obtained according to the inventive process.
    Type: Application
    Filed: April 25, 2012
    Publication date: February 6, 2014
    Applicant: LONZA LTD
    Inventors: Ellen Klegraf, Miguel Angel Caraucan Davila
  • Process for the preparation of perfluoropolyethers acyl-fluoride ended by reduction of the corresponding peroxidic perfluoropolyethers
    Patent number: 6919479
    Abstract: A process for the preparation of perfluoropolyethers of formula: T-CFX?—O—Rf—CFX—COF??(I) wherein: T=COF, F, C1-C3 perfluoroalkyl; X, X?=—F, —CF3; Rf=—(C2F4O)m(CF2CF(CF3)O)n(CF2O)p(CF(CF3)O)q—, the sum n+m+p+q ranges from 2 to 200, by reduction with hydrogen of the corresponding peroxidic perfluoropolyethers, in the presence of a catalyst formed by metals of the VIII group supported on metal fluorides, at a temperture from 20° C. to 140° C., and at a pressure between 1 and 50 atm.
    Type: Grant
    Filed: August 1, 2003
    Date of Patent: July 19, 2005
    Assignee: Solvay Solexis S.p.A.
    Inventors: Antonella Di Meo, Rosaldo Picozzi, Claudio Tonelli