Patents by Inventor Robert Tirtiaux

Robert Tirtiaux 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).

  • Sulphonic acids and sulphonates
    Patent number: 4618458
    Abstract: Purification of sulphuric acid rich sulphonic acids particularly those prepared by oleum sulphonation, by water washing, treatment with an olefine and final heat treatment.
    Type: Grant
    Filed: November 3, 1980
    Date of Patent: October 21, 1986
    Assignee: Exxon Research & Engineering Co.
    Inventors: Marcel Prillieux, Robert M. Laurent, Robert Tirtiaux
  • Antifoam additives
    Patent number: 4411806
    Abstract: Improved dispersion of silicone antifoams in lubricating compositions is achieved by dissolving the antifoam in an alkyl aromatic hydrocarbon of molecular weight below 330 and with a flash point above 140.degree. C.
    Type: Grant
    Filed: March 13, 1981
    Date of Patent: October 25, 1983
    Assignee: Exxon Research & Engineering Co.
    Inventors: Robert Tirtiaux, Alain L. P. Lenack
  • Calcium sulphonate process
    Patent number: 4387033
    Abstract: In producing basic Calcium Sulphonate by carbonating mixtures of sulphonic acids, calcium hydroxide, alcohols and toluene the use of a narrowly defined temperature profile during carbonation enables product of improved oil solubility and viscosity to be obtained as well as leading to improved filterability.
    Type: Grant
    Filed: August 18, 1981
    Date of Patent: June 7, 1983
    Assignee: Exxon Research & Engineering Co.
    Inventors: Alain L. Lenack, Robert Tirtiaux
  • Overbased sulphonates
    Patent number: 4259193
    Abstract: Overbased alkaline earth metal sulphonates obtained from monoalkyl orthoxylene or toluene have been found to have reduced foaming tendency as compared with corresponding benzene based sulphonates.
    Type: Grant
    Filed: April 16, 1979
    Date of Patent: March 31, 1981
    Assignee: Exxon Research & Engineering Co.
    Inventors: Robert Tirtiaux, Robert M. Laurent
  • Lubricating oil containing a surface active agent
    Patent number: 4239634
    Abstract: Surface active agents for oil in water emulsions and oil recovery comprising salts of alkaryl sulphonic acids and organic bases containing at least one --(C.sub.2 H.sub.4 O).sub.n H where n is greater than 1.
    Type: Grant
    Filed: May 14, 1979
    Date of Patent: December 16, 1980
    Assignee: Exxon Research & Engineering Co.
    Inventors: Pierre D. Marin, Marcel Prillieux, Robert Tirtiaux
  • Alkylates and sulphonic acids and sulphonates produced therefrom
    Patent number: 4235810
    Abstract: Alkyl aromatics are prepared by alkylation with a mixture of straight and branched chain olefines. The alkylates may be sulphonated to yield low viscosity sulphonate emulsifiers and are raw materials for producing low foaming overbased sulphonate lubricant additives.
    Type: Grant
    Filed: August 3, 1978
    Date of Patent: November 25, 1980
    Assignee: Exxon Research & Engineering Co.
    Inventors: Andre Osselet, Robert Tirtiaux
  • Alkylaryl sulphonic acids
    Patent number: 4172844
    Abstract: The development of color of a concentrate of alkarylsulphonic acids is reduced by adding to and dissolving in the freshly prepared concentrate up to 5% of its weight of an organic compound having at least one ether group therein, the partial vapor pressure of the compound thus dissolved in the concentrate being negligible at the temperatures at which the concentrate is stored or transported. Examples of suitable organic compounds are aliphatic or phenolic monoethers, e.g. diethylene glycol.
    Type: Grant
    Filed: March 11, 1975
    Date of Patent: October 30, 1979
    Assignee: Exxon Research & Engineering Co.
    Inventors: Marcel Prillieux, Marcel Robert, Robert Tirtiaux
  • Surface-active agent
    Patent number: 4171323
    Abstract: Surface active agents for oil in water emulsions and oil recovery comprising salts of alkaryl sulphonic acids and organic bases containing at least one --(C.sub.2 H.sub.4 O).sub.n H where n is greater than 1.
    Type: Grant
    Filed: October 26, 1977
    Date of Patent: October 16, 1979
    Assignee: Exxon Research & Engineering Co.
    Inventors: Pierre D. Marin, Marcel Prillieux, Robert Tirtiaux
  • Hydrogenated olefine oligomers
    Patent number: 4078010
    Abstract: Oligomerizing propylene using a Friedel Crafts catalyst at a temperature in the range -10.degree. to 80.degree. C and hydrogenating the oligomer so obtained to produce oils useful as hydraulic fluids.
    Type: Grant
    Filed: July 11, 1975
    Date of Patent: March 7, 1978
    Assignee: Exxon Research & Engineering Co.
    Inventors: Marcel Prillieux, Marcel Robert, Robert Tirtiaux
  • Blends of hydrogenated oligomers of cyclopentadienes and paraffinic oils
    Patent number: 4023980
    Abstract: Blends of paraffinic oils and hydrogenated polycyclopentadiene or polymethylcyclopentadiene.
    Type: Grant
    Filed: July 11, 1975
    Date of Patent: May 17, 1977
    Assignee: Exxon Research and Engineering Company
    Inventors: Marcel Prillieux, Marcel Robert, Robert Tirtiaux