Patents by Inventor Rafael Pi Subirana

Rafael Pi Subirana 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 preparing alkoxylated fatty acid alkyl esters
    Patent number: 6008391
    Abstract: A process for making alkoxylated fatty acid alkyl esters involving: (a) providing a fatty acid alkyl ester; (b) providing an alkylene oxide component; (c) providing a catalyst component containing a mixture of: (i) a primary catalyst; and (ii) an alkylene glycol having from 2 to 6 carbon atoms; and (d) reacting (a)-(c) to make the alkoxylated fatty acid alkyl ester.
    Type: Grant
    Filed: September 25, 1998
    Date of Patent: December 28, 1999
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Rafael Pi Subirana, Joaquim Llosas Bigorra
  • Process for producing aqueous surfactant concentrates
    Patent number: 5958868
    Abstract: The invention concerns aqueous surfactant concentrates having a solids content of between 35 and 65 wt % and containing (a1) alkyl oligoglycosides and/or alkenyl oligoglycosides; and/or (a2) fatty acid N-alkylpolyhydroxy alkylamides; and (b) betaine, in weight ratios of (a):(b) of between 10:90 and 90:10; wherein the pH of these concentrates is between 3.5 and 6.5.
    Type: Grant
    Filed: October 24, 1997
    Date of Patent: September 28, 1999
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Rafael Pi Subirana, Nuria Bonastre Gilabert, Ester Prat Queralt, Joaquim Bigorra Llosas
  • Method of producing cross-linked cationic polymers
    Patent number: 5955567
    Abstract: Cross-linked cationic polymers are prepared by alkylating a polyaminoalide with 5 to 30 mole percent, relative to the amount of nitrogen available for alkylation, of a quaternary ammonium alkylating agent and cross-linking the resulting alkylated polyaninoamide with a molar amount of epichlorohydrin corresponding to the non-quaternized nitrogen content. The cross-linked cationic polymers are suitable for use as wet-strength resins in the treatment of paper.
    Type: Grant
    Filed: January 8, 1998
    Date of Patent: September 21, 1999
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Joaquim Bigorra Llosas, Rafael Pi Subirana
  • Quaternized fatty acid triethanolamine ester salts with improved solubility in water
    Patent number: 5886201
    Abstract: A process for producing quaternized fatty acid triethanolamine ester salts having improved solubility in water, by esterifiying a fatty acid mixture containinga) 40% to 60% by weight of linear fatty acids containing 6 to 22 carbon atoms, andb) 60% to 40% by weight of branched fatty acids containing 6 to 22 carbon atoms,wherein the esterifying step is conducted with triethanolamine or ethylene oxide adducts of triethanolamine, and the resultant esters are then quaternized.
    Type: Grant
    Filed: April 8, 1996
    Date of Patent: March 23, 1999
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Nuria Bonastre, Joaquim Bigorra Llosas, Rafael Pi Subirana
  • Process for the production of esterquats
    Patent number: 5869716
    Abstract: Esterquats based on natural fats and oils can be directly produced by subjecting fatty acid glyerine ester to ester interchange, in the presence of alkaline and/or alkaline earth boron hydrides and hypophosphoric acid or their alkaline and/or alkaline earth salts and possibly free fatty acid, with hydroxy-functionalised tertiary amines and quaternising the resultant products in the manner known per se.
    Type: Grant
    Filed: September 16, 1996
    Date of Patent: February 9, 1999
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Rafael Pi Subirana, Joaquim Bigorra Llosas, Antonio Trius Oliva
  • Process for the production of end-capped nonionic surfactants
    Patent number: 5847229
    Abstract: Process for the production of end-capped nonionic surfactants by forming an alcoholate between a fatty alcohol polyglycol ether and a solid base, reacting the alcoholate with a dialkyl sulfate, adding water to initiate phase separation, and separating the organic layer from the aqueous layer.
    Type: Grant
    Filed: June 9, 1997
    Date of Patent: December 8, 1998
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Joaquim Bigorra Llosas, Nuria Bonastre, Antonio Trius Oliva, Rafael Pi Subirana