Abstract: Use of an animal litter having a whiteness value greater than 90 %, for observing the colour of the animal's urine by observing the modification of the coulour of the litter after its contact with the urine.

Abstract: Method of forming a plasma intended for the chemical treatment of substances, in which at least two electrodes and a layer of dielectric material located between the two electrodes are placed in a chamber in order to form plasma glow discharges, in which a controlled flow comprising oxygen is introduced into the chamber, the controlled flow of gas during its introduction into the chamber containing none of the substances to be treated.

Abstract: A method for modifying or synthesizing a polymeric material where a chemical compound and supercritical carbon dioxide are introduced into an extruder, and extruding the raw material or polymeric material under conditions permitting reaction with the chemical compound.

Abstract: Process for regenerating a spent hydrogenation catalyst comprising at least one catalytic metal selected from the group consisting of Ru, Rh, Pd, Os, Ir and Pt on an inert support, the said process essentially consisting of a thermal treatment in the presence of oxygen at a temperature of between 300 and 700° C.

Abstract: Radical polymerization process for the preparation of halogenated polymers employing one or more ethylenically unsaturated monomers, at least one of which is chosen from halogenated monomers, molecular iodine and one or more radical-generating agents chosen from diazo compounds, peroxides and dialkyl diphenylalkanes Radical polymerization process for the preparation, starting from the halogenated polymers prepared by the process as described above, of block copolymers, at least one block of which is a halogenated polymer block. Halogenated polymers which have a number-average molecular mass Mn of greater than 1.0×104 and an Mz/Mw ratio of less than 1.65. Block copolymers, at least one block of which is a block of halogenated polymer identical to the halogenated polymers described above. Block copolymers comprising at least one halogenated polymer block which have a number-average molecular mass Mn of greater than 1.5×104 and a polydispersity index Mw/Mn of less than 1.60.

Abstract: A plant for producing hydrogen peroxide and using the hydrogen peroxide so made for manufacturing an oxirane by reaction between an olefin and said hydrogen peroxide, wherein the hydrogen peroxide is manufactured by an alkylanthrahydroquinone (AO) process in which an aqueous hydrogen peroxide solution is obtained by extraction, with substantially pure water, of a mixture derived from the oxidation of at least one alkylanthrahydroquinone, without a subsequent washing, purification treatment or combination thereof.

Abstract: A process for the treatment of natural discoloration in an article, particularly a vinyl chloride polymer article, by treating the surface of the article in ambient air with a first organic solution containing an organic peroxide and a first organic solvent. The invention process is particularly useful for vinyl chloride-based articles that have undergone pinking.

Abstract: The invention provides a catalyst containing active elements including copper deposited on alumina containing at least 0.03 g of titanium, expressed in metal form, per kg of alumina and use thereof in gas hase reactions, such as the oxychlorination of ethylene to 1,2-dichloroethane. This catalyst is suitable for maintaining a constant oxygen content in the tail gases and hence in the recycled gases. The invention further pertains to the use of an alumina containing at least 0.03g titanium, expressed in metal form, per Kg of alumina, as catalyst support and as catalyst diluent. In an example a catalyst containing CuCl2, MgCl2, KCl and LiCl deposited on alumina containing 1.13 g of titanium, expressed in metal form, per Kg of alumina was used for the oxychlorination of ethylene to 1,2-dichloroethane in a fluidized bed reactor.

Abstract: Composition containing (a) a synthetic resin and (b) a filler, the filler containing (b1) at least one inorganic substance having a specific surface area higher than or equal to 15 m2/g and (b2) at least one surface-active agent and/or one coating agent. Method for producing the composition. Use of the composition for the production of films, and films obtained starting with this composition.

Abstract: Method of inerting mineral residues comprising automobile grinding residues, in which method water is added to the mineral residues so as to form a paste, the paste is mixed with phosphoric acid, and the resulting mixture is calcined.

Abstract: Use of at least one unmodified polyolefin [polyolefin (P1)] as additive for a polyolefin composition (C2) comprising at least one polyolefin modified by grafting with acid and/or anhydride groups, which groups are optionally completely or partially neutralized by a neutralizing agent [polyolefin (P2)], for improving the level of at least one mechanical property of the polyolefin composition (C2) up to a level which is improved both with respect to that of the mechanical property of the polyolefin composition (C2) and with respect to that of the mechanical property of a polyolefin composition (C1) obtained by replacing, weight for weight in the polyolefin composition (C2), all the modified polyolefin (P2) by the unmodified polyolefin (P1).

Abstract: The present invention is directed to a process for producing silane crosslinked (cured) polyethylene in which a polyethylene is grafted with a silane comprising at least one ethylenic double bond to a silane crosslinkable polyethylene which is then subjected to a crosslinking (curing) step, characterized in that the process comprises the following process steps: a) a sample is taken from the silane crosslinkable polyethylene before the curing step, b) the sample is processed into a film, c) the film is analyzed by Infrared Spectroscopy, d) a predefined area of the IR spectrum is determined and e) the area determined in step d) is correlated with the gel content in the silane crosslinked polyethylene after the curing step using a predetermined regression curve.

Abstract: Use of glycerol obtained from renewable raw materials, as starting product for producing organic compounds. Process for producing dichloropropanol, according to which glycerol is subjected to a reaction with a chlorinating agent, with the exception of a batch reaction carried out in the presence of acetic acid or its derivatives.

Abstract: Process for the purification of aqueous peroxygen solutions comprising the treatment of an aqueous peroxygen solution with (a) at least one membrane purification step, (b) optionally at least one ion exchange purification step, (c) optionally at least one dilution step, and (d) at least one other purification step, all of which can be conducted in any sequence. Aqueous peroxygen solutions having a TOC level of less than 1 mg/kg can be obtained by this process. They can be used in the manufacture of semiconductors.

Abstract: Radical polymerization process for the preparation of halogenated polymers employing one or more ethylenically unsaturated monomers, at least one of which is chosen from halogenated monomers, molecular iodine and one or more radical-generating agents chosen from diazo compounds, peroxides and dialkyl diphenylalkanes Radical polymerization process for the preparation, starting from the halogenated polymers prepared by the process as described above, of block copolymers, at least one block of which is a halogenated polymer block. Halogenated polymers which have a number-average molecular mass Mn of greater than 1.0×104 and an Mz/Mw ratio of less than 1.65. Block copolymers, at least one block of which is a block of halogenated polymer identical to the halogenated polymers described above. Block copolymers comprising at least one halogenated polymer block which have a number-average molecular mass Mn of greater than 1.5×104 and a polydispersity index Mw/Mn of less than 1.60.

Abstract: Process for manufacturing an oxirane by reaction between an olefin and hydrogen peroxide in the presence of a catalyst and an organic diluent, according to which the hydrogen peroxide is an aqueous hydrogen peroxide solution obtained by extraction, with substantially pure water, of the mixture derived from the oxidation of at least one alkylanthrahydroquinone, without subsequent washing and/or purification treatment.

Abstract: Process for preparing one or more iodinated organic substances having a molecular mass of less than 2000 (substances (S)) using (A) at least one free-radical-generating substance chosen from peroxides, diazo compounds, dialkyldiphenylalkanes, substances derived from tetraphenylethane, boranes and iniferter substances comprising at least one thiuram disulphide group, (B) an ethylenically unsaturated substance capable of adding a free radical to its ethylenic double bond, (C) molecular iodine, which comprises the steps according to which at least a fraction of (A), at least a fraction of (B) and at least a fraction of (C) are introduced into a reactor, and then the contents of the reactor are caused to react, while introducing therein the possible remainder of (A), the possible remainder of (B) and the possible remainder of (C), until a moment is reached when the content of the reactor is a mixture comprising one or more substances (S).

Abstract: An insulating panel including an integrated assembly system allowing the panel and at least one other complementary panel to be assembled in at least one dimension in space. The panel and its assembly system are of a form that, when the panel and complementary panel are assembled, they delimit with their assembly system at least one cavity suitable for housing a seal, the cavity widening at least partly towards the inside of the panel.

Abstract: Process for the manufacture of sodium carbonate crystals comprising: the addition of solid sodium carbonate (1) to an aqueous solution comprising sodium bicarbonate and sodium carbonate; the crystallization and the separation of sodium sesquicarbonate crystals; (B, C) the crystallization of sodium carbonate crystals, (E) the amount of sodium carbonate added being adjusted so that the crystallization of sesquicarbonate crystals can be carried out without preliminary evaporation of the aqueous suspension.

Abstract: Process for obtaining a hydrofluoroalkane which is purified of organic impurities, according to which the hydrofluoroalkane containing organic impurities is subjected to at least one purification treatment chosen from (a) a treatment with chlorine in the presence of a initiator (b) a reaction with hydrogen fluoride (c) a distillation in which the purified hydrofluoroalkane is removed from the top of the distillation column or from the side (d) an extractive distillation (e) an adsorption onto a solid adsorbent (f) a reaction with a compound containing oxygen, and (g) a reaction with a compound containing oxygen and a gas-phase reaction with a reagent capable of reacting with at least some of the organic impurities, with the exception of a reaction with elemental chlorine.