Patents Assigned to Fundacion Technalia Research & Innovation
  • Patent number: 9540390
    Abstract: The present invention relates to a process for the manufacturing of pure and substantially oligomers-free 1,4:3,6-dianhydrohexitol di(alkyl carbonate)s which comprises the steps of: a) Preparing a reaction mixture consisting of at least one dianhydrohexitol, at least 2 molar equivalents with respect to the amount of dianhydrohexitol present, of at least one dialkyl carbonate of formula R—O—C(?O)—O—R, where R has the same meaning indicated above, and from 0.01 to less than 0.1 molar equivalents of a transesterification catalyst with respect to the amount of dianhydrohexitol present; and b) Heating the reaction mixture up to its reflux temperature in a reactor preferably equipped with a rectification column comprising a number of theoretical distillation plates sufficient to separate continuously from the reaction mixture by fractional distillation the alcohol obtained or the azeotrope which the alcohol forms with the dialkyl carbonate present in the reaction mixture.
    Type: Grant
    Filed: January 24, 2013
    Date of Patent: January 10, 2017
    Assignee: Fundacion Technalia Research & Innovation
    Inventors: Jose Ramon Ochoa Gomez, Silvia Gil Rio, Belen Maestro Madurga, Leire Lorenzo Ibarreta, Olga Gomez De Miranda Jimenez De Aberasturi