Patents by Inventor Jacques Benzaria

Jacques Benzaria 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).

  • Method for recovery of alkali metal or alkaline-earth metal terephthalate and of alkylene glycol from polyethylene terephthalates
    Patent number: 5545746
    Abstract: An improved method for recovery of alkali metal or alkaline-earth metal terephthalate and of alkylene glycol, from polyalkylene terephthalate, in particular from polyethylene terephthalate (P.E.T.), alkylene glycol, in particular ethylene glycol produced in the form of vapor during the saponification reaction, initiated by the action of intensive kneading of polyalkylene terephthalate and the alkaline reagent at a temperature of 100.degree. to 200.degree. C. The alkylene glycol is recovered in gaseous form by entrainment by an inert gas or by extraction under low pressure. The alkaline terephthalate or alkaline-earth terephthalate is obtained in solid or powder form; it can easily be stored, transported and redissolved, in order to be purified and possibly transformed into terephthalic acid or ester.
    Type: Grant
    Filed: January 3, 1995
    Date of Patent: August 13, 1996
    Assignee: Institut Francais du Petrole
    Inventors: Jacques Benzaria, Francois Dawans, Bruno Durif-Varambon, Jean-Bernard Gaillard
  • Process for production of alkaline or alkaline-earth metal terephthalate or of terephthalic acid, of high purity, from polyol polyterephthalate and in particular from waste of an ethylene gylcol polyterephthalate
    Patent number: 5254666
    Abstract: Production of alkali metal or alkaline-earth metal terephthalate by reaction of an alkali metal or alkaline-earth metal hydroxide with a polyol polyterephthalate, and optional conversion of the terephthalate into terephthalic acid.The reaction is performed without addition of water or in the presence of an amount of water representing at most, by weight, the amount of polyterephthalate.The invention is useful for the treatment of polyol polyterephthalate waste.
    Type: Grant
    Filed: January 29, 1992
    Date of Patent: October 19, 1993
    Assignee: Institut Francais du Petrole
    Inventor: Jacques Benzaria
  • Method of adsorption by activated charcoal in a lower fluidized bed and upper fixed bed
    Patent number: 4086162
    Abstract: The improved adsorption device comprises two superposed beds of solid adsorbent in which, during the adsorption step, the times of flow of fluid phase to be passed through the first or lower bed fluidized or semi-fluidized and the second or upper bed fixed or expanded are respectively in an approximate ratio of 1:10, the sections of said first and second beds (e.g.) of substantially cylindrical shape) being in a ratio of about 1:10.
    Type: Grant
    Filed: June 16, 1976
    Date of Patent: April 25, 1978
    Inventor: Jacques Benzaria