Patents Assigned to Solvay (Societe Anonyme)
  • Compositions comprising 1,1,1,3,3-pentafluorobutane and use of these compositions
    Patent number: 6743765
    Abstract: Compositions comprising 1,1,1,3,3-pentafluorobutane and more than 5% by weight of at least one non-flammable fluoro compound, and use thereof.
    Type: Grant
    Filed: October 22, 2003
    Date of Patent: June 1, 2004
    Assignee: Solvay (Societe Anonyme)
    Inventors: Pierre Dournel, Pierre Barthelemy
  • Process for the separation of enantiomers and enantiopure reagent
    Patent number: 6743373
    Abstract: Process for the separation of enantiomers comprising at least one free functional group, in which process a reagent based on an enantiopure amino acid is reacted in basic medium with a mixture comprising enantiometers.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: June 1, 2004
    Assignee: Solvay (Societe Anonyme)
    Inventors: Thierry Delplanche, Roland Callens
  • Fuel tank
    Patent number: 6739350
    Abstract: Fuel tank comprising a canister containing a composition capable of retaining fuel vapours and which is associated with an overfill prevention device also located inside the tank.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: May 25, 2004
    Assignee: Solvay (Societe Anonyme)
    Inventors: Joël Op De Beeck, Yannick Gerard, Stéphane Leonard, Jules-Joseph Van Schaftingen, Paul Wouters, Rufino Perez-Perez
  • Polymeric adhesive and structures with multiple polymeric layers, their process of preparation and their use
    Patent number: 6740412
    Abstract: Polymeric adhesive comprising a homogeneous mixture of at least three constituents: (a) at least one thermoplastic halogenated hydrocarbon polymer, (b) at least one copolymer of monoethylenic monomers which carry an alkyl carboxylate functional group and (c) at least one alpha-olefin polymer modified by the incorporation of at least one functional group chosen from a carboxyl, an acid anhydride, a hydroxyl and an epoxide. Process for the preparation of this polymeric adhesive and use of this polymeric adhesive in the preparation of structures with multiple polymeric layers. Structures with multiple polymeric layers comprising a layer (A) based on thermoplastic halogenated hydrocarbon polymer bonded to a layer (C) based on thermoplastic nonhalogenated polymer incompatible with (A) via a layer (B) based on this polymeric adhesive.
    Type: Grant
    Filed: July 9, 2001
    Date of Patent: May 25, 2004
    Assignee: Solvay (Societe Anonyme)
    Inventors: Jean-Marie Oreins, Vincent Thulliez, Guy Laurent, Fredy Declerck
  • Process for the preparation of an aqueous dispersion of halogenated vinyl polymers involving a basic after-treatment
    Patent number: 6730726
    Abstract: The invention relates to a process for the preparation of an aqueous dispersion of halogenated vinyl polymers by polymerization, according to which, after polymerization, a basic agent is added in an amount such that the pH of the aqueous dispersion is less than approximately 5. The invention also relates to the aqueous dispersion obtained, which can be coated onto polymeric substrates made of paper or of regenerated cellulose.
    Type: Grant
    Filed: August 28, 2000
    Date of Patent: May 4, 2004
    Assignee: Solvay (Societe Anonyme)
    Inventors: Yves Vanderveken, Bernard Guenaire, Xavier Bacque
  • Method for preparing 1,1,1,3,3-pentafluoropropane
    Patent number: 6730817
    Abstract: 1,1,1,3,3-Pentafluoropropane is produced by reaction between 1,1,1,3,3-pentachloropropane and hydrogen fluoride in the presence of a hydrofluorination catalyst. The 1,1,1,3,3-pentachloropropane may advantageously be obtained by reaction between vinyl chloride and tetrachloromethane in the presence of a telomerization catalyst and of a nitrile.
    Type: Grant
    Filed: June 8, 1998
    Date of Patent: May 4, 2004
    Assignee: Solvay (Societe Anonyme)
    Inventors: Vincent Wilmet, Francine Janssens, Jean-Paul Schoebrechts
  • Method for producing oxirane
    Patent number: 6723861
    Abstract: Process for manufacturing oxirane by reaction of an olefin with a peroxide compound in the presence of a catalyst and a solvent in at least two reactors arranged in series, each of which contains a portion of the catalyst, according to which two epoxidation reactions are carried out in series including intermediate distillation, to minimize the formation of by-products.
    Type: Grant
    Filed: December 19, 2002
    Date of Patent: April 20, 2004
    Assignee: Solvay (Societe Anonyme)
    Inventor: Dominique Balthasart
  • Multilayer thermoplastic structure
    Patent number: 6713165
    Abstract: Multilayer structure based on thermoplastic polymers which is substantially devoid of vinyl chloride polymers and of plasticizers of low molecular mass and which comprises at least 3 layers: a first layer (A) comprising at least 60% by weight of at least one polyolefin of controllable crystallinity defined as comprising at least 90% of ethylene, of propylene or of butene and as having a softening temperature of less than 121° C., the thickness of the first layer being at least 20% of the total thickness of the structure and the first layer having a modulus of elasticity of less than 350 MPa; a second layer (B), positioned between the first layer (A) and the third layer (C), comprising at least 40% by weight of at least one polyolefin of controllable crystallinity, the second layer having an overall softening temperature of less than 121° C.
    Type: Grant
    Filed: July 16, 2002
    Date of Patent: March 30, 2004
    Assignee: Solvay (Societe Anonyme)
    Inventor: Petrus J. A. Karsten
  • Process for polymerization of vinyl chloride
    Publication number: 20040048995
    Abstract: Process for the aqueous suspension polymerization of vinyl chloride with the use of dialkyl peroxydicarbonates in solution and process for the manufacture of a solution of dialkyl peroxydicarbonate. The dialkyl peroxydicarbonates with short alkyl chains, preferably diethyl and diisopropyl peroxydicarbonates, are used for the aqueous suspension polymerization of vinyl chloride, in the form of a solution in a dialkyl alkanedicarboxylate which is liquid and insoluble in water. The preferred solvents are hexanedicarboxylates (adipates) derived from adipic acid and from C6-C10alkanols. The peroxydicarbonate concentration of the said solutions is generally 15-40% by weight. The process according to the invention produces vinyl chloride polymers of improved quality resulting in shaped articles exhibiting markedly fewer fisheyes.
    Type: Application
    Filed: September 8, 2003
    Publication date: March 11, 2004
    Applicant: Solvay (Societe Anonyme)
    Inventor: Vincent Bodart
  • Polyphenylene sulphide-based compositions with improved impact strength and process for preparing them
    Patent number: 6699946
    Abstract: Polyphenylene sulphide-based compositions essentially containing 60 to 99.5% by weight of polyphenylene sulphide and 0.5 to 40% by weight of a combination (C) containing a compound (C1) chosen from olefinic elastomers containing epoxy groups and a compound (C2) chosen from crosslinking agents containing functional groups which are reactive towards the epoxy groups of the compound (C1) and are chosen from amino, hydroxyl, carboxyl and carboxylic acid anhydride groups. They are obtained by melt-blending polyphenylene sulphide with each of the compounds (C1) and (C2) of the combination (C) successively and in any order.
    Type: Grant
    Filed: October 24, 1994
    Date of Patent: March 2, 2004
    Assignee: Solvay (Societe Anonyme)
    Inventors: Morand Lambla, Raphaël Mestanza, Dar-Jong Lin, Eric Vandevijver, Marie-Paule Collard
  • Oxirane production using peroxidized compound
    Publication number: 20040039216
    Abstract: Process for manufacturing oxirane by reaction of an olefin with a peroxide compound in the presence of a catalyst and a solvent in at least two reactors arranged in series, each of which contains a portion of catalyst, according to which the peroxide compound is introduced only into the first reactor, the subsequent reactor(s) not being fed with fresh peroxide compound, but only with the peroxide compound which is present in the medium obtained from the preceding reactor and which was not consumed in this preceding reactor.
    Type: Application
    Filed: August 29, 2003
    Publication date: February 26, 2004
    Applicant: SOLVAY (SOCIETE ANONYME)
    Inventor: Dominique Balthasart
  • Method for producing sodium chloride crystals
    Patent number: 6692720
    Abstract: Process for the production of sodium chloride crystals from a sodium chloride brine contaminated by potassium chloride and sulphate ions, according to which a calcium compound (32) is added to the brine (48) to crystallize glauberite (35), which is isolated, the resulting aqueous solution (36) is subjected to evaporation to crystallize sodium chloride (40), which is collected, and the aqueous mother liquor (41) from the crystallization of the sodium chloride is subjected to cooling (42) to crystallize glaserite (45).
    Type: Grant
    Filed: August 27, 2001
    Date of Patent: February 17, 2004
    Assignee: Solvay (Societe Anonyme)
    Inventors: Leon Ninane, Cédric Humblot, Pascal Gerard
  • Multilayer hollow body
    Patent number: 6682795
    Abstract: Multilayer hollow body made of plastic, especially a fuel tank, having at least two molded multilayer parts welded together to form a multilayer hollow body having a hollow portion formed by a multilayer wall, each of the multilayer parts comprising at least one thermoplastic non-barrier layer and at least one barrier layer which may be comprised of a liquid-crystal polymer (LCP).
    Type: Grant
    Filed: July 13, 2000
    Date of Patent: January 27, 2004
    Assignee: Solvay (Societe Anonyme)
    Inventors: Pierre Gilliard, Jules-Joseph Van Schaftingen
  • Oxirane production using peroxidized compound
    Patent number: 6677467
    Abstract: Process for manufacturing oxirane by reaction of an olefin with a peroxide compound in the presence of a catalyst and a solvent in at least two reactors arranged in series, each of which contains a portion of catalyst, according to which the peroxide compound is introduced only into the first reactor, the subsequent reactor(s) not being fed with fresh peroxide compound, but only with the peroxide compound which is present in the medium obtained from the preceding reactor and which was not consumed in this preceding reactor.
    Type: Grant
    Filed: December 27, 2002
    Date of Patent: January 13, 2004
    Assignee: Solvay (Societe Anonyme)
    Inventor: Dominique Balthasart
  • Compositions comprising 1,1,1,3,3-pentafluorobutane and use of these compositions
    Patent number: 6660709
    Abstract: Compositions comprising 1,1,1,3,3-pentafluorobutane and more than 5% by weight of at least one non-flammable fluoro compound, and use thereof. No figures.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: December 9, 2003
    Assignee: Solvay (Societe Anonyme)
    Inventors: Pierre Dournel, Pierre Barthelemy
  • Impermeable membrane based on flexible PVC for lining pools
    Publication number: 20030212188
    Abstract: Impermeable membrane for pools, based on flexible PVC containing a glass reinforcement; manufacturing process and use of such a membrane.
    Type: Application
    Filed: March 21, 2003
    Publication date: November 13, 2003
    Applicant: SOLVAY (SOCIETE ANONYME)
    Inventor: Hans Tanghe
  • Method for making an aqueous sodium chloride solution
    Patent number: 6645458
    Abstract: Process for the manufacture of an aqueous sodium chloride solution, according to which a solid material comprising sodium chloride and heavy metals is dispersed in water, the aqueous medium thus obtained is alkalinized so as to precipitate the heavy metals in the form of metal hydroxides, calcium carbonate is coprecipitated with the metal hydroxides in the aqueous medium and the aqueous medium is then subjected to mechanical clarification.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: November 11, 2003
    Assignee: Solvay (Societe Anonyme)
    Inventor: Cédric Humblot
  • Polyolefins and process for manufacturing them
    Publication number: 20030208001
    Abstract: Process for producing polyolefins, comprising the following steps:
    Type: Application
    Filed: May 1, 2003
    Publication date: November 6, 2003
    Applicant: SOLVAY (SOCIETE ANONYME)
    Inventor: Fernand Gauthy
  • Fuel system for a vehicle
    Patent number: 6634342
    Abstract: Fuel system for a vehicle with a heat enigine, comprising a hollow body made of plastic, designed to contain or to transport fuel, and means of covering this hollow body by means of a rigid jacket surrounding the hollow body. The covering means form, with the surface of the hollow body, a confined space fitted with a device for flushing by means of air. The air which entrains any emitted vapours is purified before being discharged into the atmosphere or is mixed with the air blown out by the engine. The invention is applicable to a double jacket for a fuel tank made of plastic or to a fuel pipe fitted with a concentric channel.
    Type: Grant
    Filed: July 8, 2002
    Date of Patent: October 21, 2003
    Assignee: Solvay (Societe Anonyme)
    Inventors: Paul Wouters, Stéphane Leonard, Jules-Joseph Van Schaftingen, Joël Op De Beeck, François Dougnier, Yannick Gerard
  • Peroxy-carboxylic acid and aqueous compositions thereof
    Patent number: 6627594
    Abstract: The invention concerns compound HO—(CH2)5—COOOH or 6 -hydroxypercaproic acid, its preparation process, i.e. from &egr;-caprolactone, aqueous compositions thereof and their use as disinfectant or bleaching agents.
    Type: Grant
    Filed: April 3, 2002
    Date of Patent: September 30, 2003
    Assignee: Solvay (Societe Anonyme)
    Inventors: Alun P. James, John P. Sankey