Patents by Inventor Thomas LESUR

Thomas LESUR has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for manufacturing dianhydrohexitol crystals with a step of evaporative crystallization of the first crystallization mother liquors
    Patent number: 10526340
    Abstract: A process for manufacturing crystals of 1,4:3,6-dianhydrohexitols, by manufacturing a solution of an internal dehydration product of at least one hexitol, distilling the solution, crystallizing, and wherein the crystallization mother liquors undergo a step of evaporative crystallization. Unlike the prior art processes that seek to recycle the crystallization mother liquors, evaporative crystallization economically and efficiently replaces the succession of steps consisting of at least one concentration, then at least one step of purification by distillation, chromatography, or crystallization.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: January 7, 2020
    Assignee: ROQUETTE FRERES
    Inventors: Hervé Wyart, Thomas Lesur, Mathias Ibert
  • PROCESS FOR MANUFACTURING DIANHYDROHEXITOL CRYSTALS WITH A STEP OF EVAPORATIVE CRYSTALLIZATION OF THE FIRST CRYSTALLIZATION MOTHER LIQUORS
    Publication number: 20190135826
    Abstract: A process for manufacturing crystals of 1,4:3,6-dianhydrohexitols, by manufacturing a solution of an internal dehydration product of at least one hexitol, distilling the solution, crystallizing, and wherein the crystallization mother liquors undergo a step of evaporative crystallization. Unlike the prior art processes that seek to recycle the crystallization mother liquors, evaporative crystallization economically and efficiently replaces the succession of steps consisting of at least one concentration, then at least one step of purification by distillation, chromatography, or crystallization.
    Type: Application
    Filed: April 21, 2017
    Publication date: May 9, 2019
    Applicant: ROQUETTE FRERES
    Inventors: Hervé WYART, Thomas LESUR, Mathias IBERT