Abstract: Process for producing aminocarboxylic acid of formula (I): NH3—CH2—(CH2)n—COOH (I) including: (i) reacting the unsaturated carboxylic acid of formula (II): CH?CH—(CH2)n-1—COOH (II) with hydrogen bromide to form the ?-bromoalkanoic acid of formula (iii): Br—CH2—(CH2)n—COOH (III); (ii) reacting the w-bromoalkanoic acid obtained with ammonia in aqueous solution to form a reaction mixture; (iii) separating the reaction mixture of the aminocarboxylic acid of formula (I) and an aqueous solution rich in ammonium bromide; (iv) bringing the aqueous solution rich in ammonium bromide into contact with sodium hydroxide to form ammonia and an aqueous solution rich in sodium bromide; (v) purifying the aqueous solution rich in sodium bromide; (vi) bringing the purified aqueous solution rich in sodium bromide into contact with chlorine to form bromine and an aqueous solution rich in sodium chloride; (vii) reacting the bromine with hydrogen to form hydrogen bromide; and (viii) recycling the hydrogen bromide to step (i).

Abstract: A process for synthesizing an azo compound by oxidation of a hydrogen compound in the presence of a catalyst and a compound of formula (I) is described in which R1, R2 and R3 (R1)(R2)C(PO3(R3)2)2??(I) are as defined. The use of a compound of formula (I) as complexing agent for a catalyst is also described.

Abstract: A process for synthesizing an azo compound by oxidation of a hydrogen compound in the presence of a catalyst and a compound of formula (I) is described in which R1, R2 and R3 (R1)(R2)C(PO3(R3)2)2??(I) are as defined. The use of a compound of formula (I) as complexing agent for a catalyst is also described.

Abstract: The subject of the invention is a process for the preparation of fluoroolefin compounds.

Abstract: The subject of the invention is a process for the preparation of fluoroolefin compounds.

Abstract: The subject of the invention is a process for the preparation of fluoroolefin compounds.

Abstract: A process is provided for synthesizing an azo compound, such as AIBN, by oxidation of a hydrazo compound using hydrogen peroxide. This process comprises a step of adding to the reaction medium a particular reducing agent, such as hydrazine.

Abstract: The subject of the invention is a process for the preparation of fluoroolefin compounds.

Abstract: The present invention relates to a process for preparing concentrated alkali metal hypochlorite solutions. One subject of the invention is more particularly a process for preparing concentrated bleach which may have a chlorine content of greater than 100 chlorometric degrees, and that has a low content of chlorates.

Abstract: The subject of the invention is a process for the preparation of fluoroolefin compounds.

Abstract: A process is provided for synthesizing an azo compound, such as AIBN, by oxidation of a hydrazo compound using hydrogen peroxide. This process comprises a step of adding to the reaction medium a particular reducing agent, such as hydrazine.

Abstract: The invention relates to a method for preparing olefin fluorine compounds. Specifically, the invention relates to a method for producing a (hydro)fluoroolefin compound, including: (i) in an agitated reactor provided with at least one reactant inlet and at least one outlet, contacting, with potassium hydroxide in an aqueous reaction medium, at least one compound containing three to six carbon atoms, at least two fluorine atoms, and at least one hydrogen atom, with the proviso that at least one hydrogen atom and one fluorine atom are located on adjacent carbon atoms, so as produce the (hydro)fluoroolefin compound, separated in a gaseous state from the reaction medium and from potassium fluoride; (ii) in an aqueous medium, contacting the potassium fluoride formed in step (i) with calcium hydroxide in a second reactor so as to produce potassium.

Abstract: The invention relates to a method for preparing olefin fluorine compounds.

Abstract: The present invention relates to a process for preparing concentrated alkali metal hypochlorite solutions. One subject of the invention is more particularly a process for preparing concentrated bleach which may have a chlorine content of greater than 100 chlorometric degrees, and that has a low content of chlorates.

Abstract: The invention relates to a method for preparing olefin fluorine compounds.

Abstract: The subject of the invention is a process for the preparation of fluoroolefin compounds.

Abstract: The invention concerns a method for making aminoguanidine bicarbonate from an aqueous solution of cyanamide and an aqueous solution of hydrazine in the presence of CO2. The invention is characterised in that it consists in proceeding with an amount of cyamide slightly higher than the stoichiometric quantity. The invention also concerns quasi-spherical agglomerates of aminoguanidine bicarbonate crystals.

Abstract: The invention relates to a method for production of azo compounds. In particular the invention relates to a step-wise method for production of an azo compound, by seeding and oxidation of the corresponding hydrazoic compound.

Abstract: The invention concerns a method for making anhydrous sodium perchlorate whereby an aqueous sodium perchlorate solution, directly derived from electrolysis of an aqueous sodium chlorate solution, is subjected to vacuum evaporation. The invention also concerns anhydrous sodium perchlorate crystals which preserve good pourability and methods for making them.

Abstract: The invention relates to a novel sodium percarbonate in the form of agglomerates of small crystals. The average particle size of the agglomerates is greater than 600 &mgr;m. The apparent density of the agglomerates is between 0.75 g/cm3 and 1.1 g/cm3, and the active oxygen is greater than 14%. The invention also relates to a process for the continuous manufacture of sodium percarbonate in a fluidized bed.