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.

Abstract: This invention relates to a binder composition for the manufacture of iron ore pellets containing: a) at least two organic binding agents LO in the form of solid particles, which are at least: a water-soluble anionic polymer P1 with a weight average molecular weight between 500 and 200,000 daltons, and, a water-soluble anionic polymer P2 with a weight average molecular weight greater than 500,000 daltons; and; b) at least one inorganic binding agent LI in the form of solid particles, the solid particles of the binding agents LO having a number median size of more than 500 micrometers, the particles of the binding agent LI have a number median size of less than one-third of the number median size of the solid particles of the binding agents LO.

Abstract: The present invention concerns the technical field of cementing, in particular in the construction of oil and/or gas wells or geothermal energy. More specifically, the subject of the present invention is a cementitious composition and an improved method of cementing by means of the introduction into the cement of a polymeric micro-gel as an anti-gas migration agent.

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.

Abstract: A device for dispersing a water-soluble polymer in powder form having a standard particle size of less than 1 mm, includes: a wetting chamber, a chamber for grinding and discharging the dispersed polymer with a horizontal axis of revolution, and a mechanism for connecting the wetting chamber to the grinding chamber in the form of an L-shaped tube. The upper and lower parts of the wetting chamber and the L-shaped tube have an internal surface with an identical surface tension (TS1). The cover of the wetting chamber has an internal surface with a surface tension (TS2) higher than the surface tension (TS1) of the internal surface of the upper and lower parts of the wetting chamber and the L-shaped tube.

Abstract: This invention relates to a new water-soluble dialdehyde-functionalized polymer its preparation method and use, notably for application in the field of paper or cardboard manufacturing.

Abstract: An injection fluid for hydraulic fracturing including at least one synthetic water-soluble polymer with a weight average molecular weight greater than or equal to 1 million daltons, the fluid being prepared according to a method including preparing, by radical polymerization an invert emulsion including between 15% and 40% by weight of the polymer, between 20% and 60% by weight of water and at least one hydrocarbon-based solvent, distilling the invert emulsion to obtain a dispersion including between 40% and 60% by weight of particles of the polymer, less than 10% by weight of water and at least one hydrocarbon-based solvent, and diluting the dispersion with 1% to 15% by weight of an aqueous solution including between 20% and 60% by weight of salts.

Abstract: The present invention relates to a method for preparing a polymer reverse emulsion polymerization comprising the following steps: a) Preparation of an aqueous phase comprising at least one water-soluble monomer and at least one water-soluble precursor of formula (I): b) Preparation of an organic phase comprising a lipophilic solvent and at least one water-in-oil surfactant, c) Mixing the aqueous phase and the organic phase while stirring to form an inverse emulsion, d) Once the inverse emulsion has been formed, addition of a radical polymerization initiator in said inverse emulsion, and obtaining a polymer by polymerization of at least one water-soluble monomer.

Abstract: The present invention relates to a novel anionic water-soluble polymer, to the method for the preparation thereof and to the use thereof, notably in the paper field.

Abstract: The invention relates to a process for producing an aqueous acrylamide solution, comprising: (a) combining water and at least one biocatalyst having nitrile hydratase activity to provide a slurry; (b) feeding acrylonitrile into a reactor comprising said slurry to provide a reaction mixture; and (c) monitoring said reaction mixture by online GC to measure a concentration of acrylonitrile in reactor's headspace with several detection technologies selected in the group consisting of Flame Ionization Detector, Mass Spectrometry, Thermal Conductivity Detector, Electron Capture Detector, Nitrogen-Phosphorus detector and vacuum ultraviolet detector.

Abstract: This invention relates to a new polyvinylamine polymer, its preparation method and use, specifically for application in the field of paper manufacturing.

Abstract: The present invention relates to a novel anionic water-soluble polymer, to the method for the preparation thereof and to the use thereof, notably in the paper field.

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: This invention relates to a new water-soluble dialdehyde-functionalized polymer its preparation method and use, notably for application in the field of paper or cardboard manufacturing.

Abstract: This invention relates to a new polyvinylamine polymer, its preparation method and use, specifically for application in the field of paper manufacturing.

Abstract: This invention relates to a binder composition for the manufacture of iron ore pellets containing: a) at least two organic binding agents LO in the form of solid particles, which are at least: a water-soluble anionic polymer P1 with a weight average molecular weight between 500 and 200,000 daltons, and, a water-soluble anionic polymer P2 with a weight average molecular weight greater than 500,000 daltons; and; b) at least one inorganic binding agent LI in the form of solid particles, the solid particles of the binding agents LO having a number median size of more than 500 micrometers, the particles of the binding agent LI have a number median size of less than one-third of the number median size of the solid particles of the binding agents LO.

Abstract: The present invention concerns the technical field of cementing, in particular in the construction of oil and/or gas wells or geothermal energy. More specifically, the subject of the present invention is a cementitious composition and an improved method of cementing by means of the introduction into the cement of a polymeric micro-gel as an anti-gas migration agent.