Abstract: This invention relates to a new water-soluble polymer, its method of preparation, and its use, in particular for applications in the field of paper.

Abstract: The present invention relates to a method for inerting clays in hydraulic compositions intended for construction purposes, said method comprising a step of adding to the hydraulic composition or to one of its constituents at least one clay inerting agent, characterised in that the clay inerting agent is a water-soluble polymer comprising acrylamide, and/or vinylamine, and/or vinylformamide monomer units, and optionally monomer units of a different chemical nature from the abovementioned chemical natures, and characterised in that its weight average molecular weight is between Mw L and Mw H.

Abstract: Provided is a polymer composition containing a water-soluble cationic copolymer P2 structured in micro-blocks obtained by radical polymerization of at least one non-ionic monomer and at least one cationic monomer, in the presence of a homopolymer P1 having an average molecular weight between 5,000 and 100,000 daltons, the homopolymer P1 having been prepared from 2-acrylamido-2-methylpropane sulphonate in salified form and in the presence of 200 to 20,000 ppm by weight of 2-methyl-2-propenyl-sulphonic acid in salified form. Related methods are also provided.

Abstract: The invention relates to a method for preparing an interpenetrated network (IPN) in powder form used as flocculant in the Bayer process.

Abstract: The invention relates to a gel polymerization method for preparing water-soluble polymers, with a weight-average molecular weight greater than 1 million Dalton, in powder form, used in particular as flocculants in the Bayer process.

Abstract: The present application relates to a water-in-oil reverse emulsion comprising an oil; water; at least one water-soluble cationic copolymer with an average molar mass of more than 3 million daltons, containing between 18 and 32 mole % of cationic monomers and 68 and 82 mole of nonionic monomers; at least one reversing agent and at least one emulsifying agent, the weight ratio R of the total amount of reversing agent to the total amount of emulsifying agent being greater than 1.8, the reversing agent being selected from an ethoxylated nonylphenol, preferably having between 4 and 10 ethoxylations; an ethoxylated/propoxylated alcohol, preferably having ethoxylations/propoxylations so as to have a total carbon number between C12 and C25, an ethoxylated tridecyl alcohol and an ethoxylated/propoxylated fatty alcohol. the emulsifying agent being selected from sorbitan monooleate, polyethoxylated sorbitan esters or diethanolamide of tall oil fatty acids, and its use in hydraulic fracturing.

Abstract: The present invention relates to a crystalline form of 2-acrylamido-2-methylpropanesulphonic acid of the sodium salt ATBS.Na having an X-ray powder diffraction pattern comprising peaks at 11.7°; 12.2°; 13.2°; 13.5°; 15.6°; 16.8°; 17.8°; 18.5°; 19.1°; 20.6°; 21.4°; 23.3°; 25.1°; 25.8°; 26.9°; 29.1°; 29.5°; 31.0°; 33.0°; 33.6°; 34.4°; 35.2°; 35.9°; 37.1°; 38.4°; 39.6°; 41.1°; 42.9°; 45.1°; 46.0°; 47.2°; 47.6 2-theta angles (+/?0.1°).

Abstract: The present invention relates to a method for injecting an aqueous solution of a 2-acrylamido-2-methylpropanesulfonate homopolymer P and/or its salts having an average molecular weight greater than 1 million daltons, said method comprising the following successive steps: in a location A: preparation in a mobile unit U1 of sodium 2-acrylamido-2-methylpropanesulfonate in crystalline form (AMPS.S), collection of an AMPS.OS sodium 2-acrylamido-2-methylpropanesulfonate aqueous solution S1, coming from the purge of the preparation of the AMPS.s in the mobile unit U1, in a location A?: preparation in a mobile unit U3 of a homopolymer P by gel polymerisation of an AMPS.

Abstract: The present invention relates to a method for treating a suspension of solid particles in water using water-soluble polymers obtained from the crystalline form of ATBS.Na. This method is particularly useful for treating residues from the mining industry.

Abstract: A treatment method of at least one colloidal TOC present in wastewater, said at least one colloidal TOC being selected among starch, oil, and dye, comprising the steps of: (a) un-stabilizing the at least one colloid TOC by adding an alkaline source to the wastewater to raise the pH to 11 to 12.5; (b) precipitating the at least one colloid TOC by adding a polymer flocculant; and (c) separating the at least one precipitated colloid TOC into solid and liquid under conditions of pH 11 to 12.5 and discharging it out of the system.

Abstract: The invention relates to a method for enhanced oil recovery in a subterranean formation. This method involves injecting a first fluid comprising a water-soluble polymer of hydrophilic monomers and injecting a second fluid comprising a water-soluble associative polymer of hydrophilic monomer(s) and hydrophobic monomer(s).

Abstract: A modulable method for treating an aqueous effluent including a mechanical treatment, voluntary and controlled, of an aqueous solution (S) of water-soluble polymer (P) to obtain n aqueous solutions (S?[1, . . . , n]), respectively including at least one polymer (P?[1, . . . , n]) resulting from the shearing of the water-soluble polymer (P), and addition of an appropriate combination of the solutions (S) and (S?[1, . . . , n]) to the effluent to be treated.

Abstract: A process for increasing the extraction yield of vanadium oxides from the spent liquor generated in the Bayer process for the recovery of alumina from bauxite, with the use of a water-soluble polymer. The water-soluble may be a polysaccharide or a synthetic polymer, which may include at least one non-ionic and/or anionic and/or cationic hydrophilic monomers.

Abstract: A hybrid polymer obtained by a free-radical polymerization process between at least one unsaturated ethylenic monomer and at least one protein. Also, the use of at least one hybrid polymer in a variety of compositions, and the use of compositions including at least one hybrid polymer in numerous fields of application.

Abstract: A water-soluble polymer has weight-average molecular weight greater than 10 million daltons. This polymer is obtained from 2-acrylamido-2-methylpropane sulfonic acid and/or one of its salts at least partially of renewable and non-fossil origin. The polymer can be used in the field of enhanced oil and gas recovery or in the treatment of tailings from the mining industry.

Abstract: This invention relates to a water-soluble P1 polymer of weight-average molecular weight less than 2 million Daltons in powder form prepared by a gel polymerization process comprising the following sequential steps of: a) Forming an S1 solution by adding, and mixing, in a polymerization reactor: between 20 and 60% by weight of hydrophilic monomers, between 30 and 79% by weight of a P2 polymer containing at least 1% by weight of hydrophobic monomers, b) Adding a pH regulator to the S1 solution, c) Degassing the S1 solution, d) Adding at least one polymerization initiator to the S1 solution, the S1 solution being at a temperature between ?5° C. and 30° C., e) Forming a P1 polymer gel by polymerizing the S1 solution from step d) and allowing the P1 polymer gel to age at a final polymerization temperature between 80° C. and 150° C.

Abstract: This invention relates to a polymer composition comprising a water-soluble anionic P2 polymer obtained by radical polymerization of at least one anionic monomer, in the presence of a water-soluble homopolymer P1 with a weight-average molecular weight of between 5,000 and 100,000 daltons said water-soluble anionic P2 polymer having a weight-average molecular weight of greater than 100,000 dalton and less than or equal to 40 million daltons, said water-soluble P1 homopolymer having been prepared from 2-acrylamido-2-methylpropanesulphonic acid in salified form and in the presence of 200 to 20,000 ppm by weight of 2-methyl-2-propenylsulphonic acid in salified form.

Abstract: The present invention relates to a binding composition, for the manufacture of ore agglomerates, comprising at least the following two distinct organic binding agents CP1 and P2: a polymeric composition CP1 comprising a non-ionic or anionic water-soluble synthetic polymer P1 with a weight average molecular weight of between 500,000 and 3 million Daltons, a non-ionic or anionic water-soluble synthetic polymer P2 with a weight average molecular weight greater than 2 million Daltons, wherein the polymeric composition CP1 and the polymer P2 are both present in the form of solid particles, wherein P1 is obtained by a gel polymerization process of at least one non-ionic or anionic monomer in the presence of: at least 1% by weight of a polymer P3, said polymer P3 contains at least one hydrophobic monomer, or at least one hydrophobic monomer, the polymeric composition CP1 comprising from 0.1% to 20% by weight of the at least one hydrophobic monomer, said hydrophobic monomer being polymerized.

Abstract: A process for making a sheet of paper or cardboard from a fiber suspension, includes injection of a polymer P3 into a cellulosic fiber suspension, formation of a sheet of paper or cardboard, and drying of the sheet of paper or cardboard. The P3 polymer is prepared, prior to the injection, from a water-soluble P1 polymer of at least one nonionic monomer, such as acrylamide, methacrylamide, N,N-dimethylacrylamide, and acrylonitrile. The P1 polymer is subjected to a Re1 reaction to give a P2 polymer, which is then subjected to a Re2 reaction to give the P3 polymer, which is injected into the fibrous suspension within 24 hours of the start of the Re1 reaction.

Abstract: The invention relates to a novel sulfobetaine monomer and to a process for the preparation thereof, advantageously by reaction between a vinyl-amine compound and a vinyl-sulfonic acid compound, preferably in the presence of a solubilizing agent. The invention also relates to the (co)polymers obtained from this novel type of sulfobetaine monomer, and to the use thereof, for example as a flocculant, dispersing agent, thickening agent, absorbent agent or friction-reducing agent.