Patents by Inventor Patrick Delafin

Patrick Delafin 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 recovery of the light noble products present in the distillation residues from the processes for the manufacture of acrylic acid and of its esters
    Patent number: 5734075
    Abstract: To recover these noble products consisting of acrylic acid monomer, acrylic ester monomers and alcohols, a thermal cracking is performed in the absence of catalyst on a mixture of heavy distillation residues originating, on the one hand, from the manufacture of acrylic acid and, on the other hand, from the manufacture of the esters, the light fraction originating from the dissociation reactions is continuously vaporized during the cracking operation and this light fraction is distilled in order to recover, after condensation, the required products.
    Type: Grant
    Filed: December 12, 1995
    Date of Patent: March 31, 1998
    Assignee: Elf Atochem S.A.
    Inventors: Michel Fauconet, Norbert Richard, Patrick Delafin