Abstract: The present invention concerns a recombinant strain belonging to the order of Actinomycetales, wherein at least one gene encoding an enzyme having vanillin reductase activity is non-functional. The present invention is also related to a process for producing vanillin or a precursor thereof, comprising the culture of a recombinant strain in an appropriate medium comprising a substrate, and recovery of the produced vanillin or precursor thereof.
Abstract: The present invention relates to the use of a cationic polysaccharide in a detergent composition used for treating dyed textile fibers in an aqueous medium, in order to reduce the loss of color of the dyed fibers when treating same using said detergent composition.
Abstract: The invention relates to a novel process for preparing a precipitated silica, in which: a silicate is reacted with an acidifying agent, so as to obtain a suspension of precipitated silica, said suspension of precipitated silica is filtered, so as to obtain a filter cake, said filter cake is subjected to a liquefaction operation, after the liquefaction operation, a drying step is performed, characterized in that at least one polycarboxylic acid is added to the filter cake, during or after the liquefaction operation. The invention also relates to novel precipitated silicas and to uses thereof.
Type:
Grant
Filed:
February 12, 2015
Date of Patent:
April 16, 2019
Assignee:
Rhodia Operations
Inventors:
Cédric Boivin, Laurent Guy, Eric Perin, Kilani Lamiri
Abstract: A process for preparing precipitated silica comprising a reaction of a silicate with an acidifying agent to obtain a suspension of precipitated silica (S1), followed by a separation step to obtain a cake, a disintegration step of said cake to obtain a suspension of precipitated silica (S2), and a drying step of this suspension, wherein the disintegration step is performed by mixing using a twin-screw mixer or by extrusion.
Type:
Grant
Filed:
March 21, 2013
Date of Patent:
April 2, 2019
Assignee:
Rhodia Operations
Inventors:
Sylvaine Neveu, Anne-Laure Pinault, Philippe Jost
Abstract: Products and processes that are related to phosphonated polysaccharide compositions, including phosphonated polysaccharide gels, having a substituent degree of substitution with a lower limit of 0.02 and an upper limit of 3, and having a weight average molecular weight with an upper limit of 5,000,000 g/mole, as well as to oil field application or fracturing fluid compositions comprising such phosphonated polysaccharide compositions.
Type:
Grant
Filed:
June 10, 2016
Date of Patent:
March 26, 2019
Assignee:
Rhodia Operations
Inventors:
Laurianne Timbart, Gilda Lizarraga, Gary Woodward, Subramanian Kesavan, David James Wilson
Abstract: Described herein are methods for forming inorganic composite oxides. Such methods include combining, at a substantially constant pH of between about 5 and about 6.75 over a period of at least about 5 minutes, an acidic precursor composition and a basic composition to form a precipitate composition, wherein the acidic precursor composition comprises an alumina precursor, a ceria precursor, a zirconia precursor and optionally one or more dopant precursors; stabilizing the precipitate by increasing the pH of the precipitate composition to between about 8 and about 10; and calcining the stabilized precipitate to form an inorganic composite oxide. Also described are inorganic composite oxides formed using such methods.
Type:
Grant
Filed:
December 23, 2014
Date of Patent:
March 26, 2019
Assignee:
Rhodia Operations
Inventors:
Qiang Zhao, Barry W. L. Southward, Francis Francis, Fabien Ocampo
Abstract: The present disclosure relates to a hybrid nanoparticle comprising a metallic core and at least one lipophilic dendron attached to the surface of the metallic core, and methods of producing such hybrid nanoparticles. The present disclosure also relates to films containing the hybrid nanoparticles described herein.
Type:
Grant
Filed:
June 10, 2016
Date of Patent:
February 19, 2019
Assignees:
Rhodia Operations, Centre National De La Recherche Scientifique, The Trustees of the University of Pennsylvania
Inventors:
Bertrand Donnio, Davit Jishkariani, Benjamin Diroll, Lawrence Alan Hough, Christopher Murray, Matteo Cargnello, Ludivine Malassis
Abstract: A process for extraction of ferulic acid present in an aqueous phase, obtained by treatment of at least one plant material, and also containing polysaccharides, is described, said process comprising at least the following steps: 1) the treatment of said plant material followed by a solid/liquid separation to recover a solid phase and an aqueous liquid phase comprising the ferulic acid and said polysaccharides, 2) the treatment of said liquid phase to selectively separate, on the one hand, the polysaccharides and, on the other hand, the ferulic acid present in an aqueous fraction, 3) the concentration of said aqueous fraction containing the ferulic acid so as to recover a ferulic acid-concentrated stream, 4) the recovery of the ferulic acid in solid form.
Type:
Grant
Filed:
May 19, 2014
Date of Patent:
February 12, 2019
Assignee:
Rhodia Operations
Inventors:
Denis Revelant, Stephanie Foucher, Dominique Horbez, Philippe Marion
Abstract: The invention pertains to a dish support rack having outstanding resistance to chemically harsh environments, and possessing improved mechanical properties, said dish support rack comprising a metal wire frame coated with a polyamide composition [composition (C)] comprising: —more than 50% wt of a polyamide [polyamide (A), herein after], more than 50% moles of recurring units of said polyamide complying with formula: —HN—(CH2)6—NH—C(O)—(CH2)8—C(O)— [recurring units (R6,10)], and, optionally: —up to 10% wt of conventional filler(s) and/or additive(s), and to a method for its manufacture.
Abstract: A composition of zirconium oxide and at least one oxide of a rare earth other than cerium is described. The zirconium oxide has a weight proportion of at least 50% and, after calcination at a temperature of 900° C. for 4 hours, the composition exhibits two populations of pores of which their respective diameters are centered. The diameter of the first pore has a value of from 20 nm to 40 nm and in the second pore has a value of from 80 nm to 200 nm. Further described is how the composition can be used for treating the exhaust gases of internal combustion engines.
Abstract: The invention relates to a plasticizing composition comprising a vinyl chloride resin and a plasticizing agent which comprises at least one diester having the general formula (I), derived from a diacid selected from succinic acid, glutaric acid, adipic acid, ethylsuccinic acid, methylglutaric acid and mixtures thereof wherein: A is a C4 to C6 linear or branched aliphatic chain, and R is an alkyl, a cycloalkyl or an aryl. The plasticizing agent according to the present invention has a good performance for different types of formulations (foam, film and paste). Said plasticizer gels rapidly, has a very low viscosity, and ages very well. Efficient debubblizing is one of the key properties thereof. The foams prepared with said plasticizer have very low densities, a high expansion rate, and excellent qualities.
Abstract: The present invention then concerns a fabric softener composition that performs well on softening fabrics, which comprises a blend of amphoteric surfactant carrying a C12-C22-alkyl or C12-C22-alkenyl, a fatty acid or a fatty alcohol, and a polysaccharide or polysaccharide derivative. The invention also concerns the use of said softening composition to impart fabric softness to fabrics.
Abstract: The present invention relates to a process for hydroxylation of a compound of formula (I) by reacting the compound of formula (I) with an oxidizing agent, in the presence of a titanium silicalite zeolite prepared by crystallization preceded by a maturing step. The present invention also relates to a titanium silicalite zeolite and to the process for preparing same.
Type:
Grant
Filed:
May 18, 2017
Date of Patent:
January 8, 2019
Assignees:
Rhodia Operations, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE—C.N.R.S.
Abstract: The present invention relates to a method for preparing an aqueous dispersion of water-soluble polymers, which comprises a step (E) of radical polymerization, wherein the following are brought into contact in an aqueous medium (M) in which the synthesized polymer is not soluble: at least one ethylenically unsaturated monomer which is soluble in the aqueous medium (M); at least one source of free radicals; and a reactive stabilizer which comprises: a polymer chain (CP) which is soluble in the medium (M), a group (G) providing the radical polymerization of step (E) with a living and controlled nature, such as, for example, a group carrying a thiocarbonylthio —S(C?S)— group.
Type:
Grant
Filed:
March 11, 2013
Date of Patent:
December 25, 2018
Assignee:
Rhodia Operations
Inventors:
Mathias Destarac, David James Wilson, Silvia Stoilova
Abstract: The present invention relates to cerium oxide particles that have excellent heat resistance especially useful for catalysts, functional ceramics, solid electrolyte for fuel cells, polishing, ultraviolet absorbers and the like, and particularly suitable for use as a catalyst or co-catalyst material, for instance in catalysis for purifying vehicle exhaust gas. The present invention also relates to a method for preparing such cerium oxide particles, and a catalyst, such as for purifying exhaust gas, utilizing these cerium oxide particles.
Abstract: The present invention provides a solid composition comprising a polysaccharide and a hydrophobic compound having a melting point of between 30° C. and 90° C. The solid composition may further comprise a quaternary ammonium compound, wherein the weight ratio of the polysaccharide and the hydrophobic compound is between 1:50 and 50:1. Preferably, the solid composition is substantially free or completely free of water. The solid composition shows excellent stability at a temperature up to 45° C. The present invention also provides a process for preparing the solid composition and a liquid composition comprising said solid composition, and a method for conditioning a fabric by using said solid composition or said liquid composition as well.
Type:
Grant
Filed:
December 22, 2014
Date of Patent:
December 18, 2018
Assignee:
Rhodia Operations
Inventors:
Hai Zhou Zhang, Nikolay Christov, Da Wei Jin, Lin He
Abstract: Catalyst/catalyst support compositions are characterized by a supported cerium oxide, deposited onto a silica, alumina, titanium or zirconium based support, including particles of said supported oxide deposited onto said support, individualized or in the form of aggregates, no greater than 500 nm in size and having, after 6 hours of calcination at a temperature of at least 800° C., a measured reducibility from 30° C. and 900° C. of at least 80%; such compositions are prepared by combining a colloidal dispersion of the supported oxide and a suspension of the support, drying the resulting mixture by atomization and drying the resulting product by calcination.
Abstract: Disclosed are novel tri-substituted aromatic-alkoxylated polymeric dispersants and related method of preparing. Also disclosed are methods of dispersing at least one pigment comprising the following steps: contacting an aqueous solution containing at least one pigment with the polymeric dispersant copolymers as described herein.
Type:
Grant
Filed:
March 18, 2015
Date of Patent:
November 20, 2018
Assignee:
Rhodia Operations
Inventors:
Nemesio Martinez-Castro, Lichang Zhou, Eugene J. Anderson, Brian Vest
Abstract: Curable composition comprising at least one epoxy resin and at least one curing agent selected from derivatives of 5-hydroxymethylfurfural. Curable dispersion, curable prepolymer composition and process for manufacturing it. Process for the manufacture of an epoxy thermoset, epoxy thermoset and method for adhering at least two substrates.
Abstract: The invention relates to compositions for inhibiting the formation of deposits in underground formations such as oil wells, comprising, in a solvent medium, polymers P resulting from the radical copolymerization, preferably controlled and in solution, of a mixture including: monomers having an ethylenically unsaturated structure, selected from monomers that form, by polymerization, a polymer that has an effect of inhibiting the formation of organic and/or inorganic deposits; and polyethylenically unsaturated, cross-linking monomers carrying at least one group that can be cleaved between two ethylene unsaturations, said polymers P being present in the solvent in the form of dispersed nanogels.