Abstract: The instant invention relates to the Fluorochemical composition comprising a dispersion or a solution of a fluorinated compound, wherein said fluorinated compound comprises the reaction product of at least two reactants A and B wherein reactant A being a compound of formula (I); Rf—O—(CF(CF3)CF2O)mCF(CF3)—X—Y—Z??(I) with Rf being a perfluorinated alkyl group, m being from 3 to 25; X being a carbonyl group or CH2; Y being a chemical bond or an organic divalent or trivalent linking group bearing a functional or difunctional isocyanate reactive group; Z being an organic group bearing at least one cationic group, reactant B being a polyfunctional isocyanate or a mixture thereof and optionally one or more isocyanate-reactive co-reactants C.

Abstract: The instant invention relates to the Fluorochemical composition comprising a dispersion or a solution of a fluorinated compound, wherein said fluorinated compound comprises the reaction product of at least two reactants A and B wherein reactant A being a compound of formula (I); Rf—O—(CF(CF3)CF2O)mCF(CF3)—X—Y—Z ??(I) with Rf being a perfluorinated alkyl group, m being from 3 to 25; X being a carbonyl group or CH2; Y being a chemical bond or an organic divalent or trivalent linking group bearing a functional or difunctional isocyanate reactive group; Z being an organic group bearing at least one cationic group, reactant B being a polyfunctional isocyanate or a mixture thereof and optionally one or more isocyanate-reactive co-reactants C.

Abstract: Use of a product of formula (I): ##STR1## in which M represents a hydrogen, lithium, sodium or potassium atom, or an NH.sub.4 group and n represents 2 or 3, as an agent for trapping hydrogen sulphide, its use for the preparation of a composition for trapping hydrogen sulphide and process for the elimination of hydrogen sulphide from a fluid.

Abstract: Process and use of decahydro pyrazino [2,3-b] pyrazine for the reduction of the proportion of free or combined hydrogen sulphide present in a fluid.

Abstract: Aqueous aldehyde solutions for trapping hydrogen sulfide comprising 5 to 50% by weight of an aldehyde and 1 to 5% by weight, relative to the aldehyde solution of a formulation comprisinga) 10 to 80% by weight of a long-chain quaternary ammonium compound and 20 to 90% by weight of water or of a C.sub.1 -C.sub.4 -alcohol,b) 10 to 80% by weight of a condensation product of a C.sub.12 -C.sub.18 -fatty acid with a polyethylene polyamine of the formulaNH.sub.2 --(C.sub.2 H.sub.4 --NH).sub.x --C.sub.2 H.sub.4 --NH.sub.2in which x is 1, 2 or 3 and the molar ratio of fatty acid to basic nitrogen in the polyethylene polyamine is 3:1 to 3:2, and 20 to 90% by weight of water or of a C.sub.1 -C.sub.4 -alcohol, orc) 50 to 95% by weight of the fatty acid-polyethylene polyamine condensation product as defined in b) and 5 to 50% by weight of a nonionic or anionic surfactant.

Abstract: Water-in-oil emulsions containing by weight about:20 to 80% of a dispersed aqueous phase containing about 20 to 70% of one or more aldehydes chosen from the group constituted by formaldehyde, glyoxal, glutaraldehyde, glycolaldehyde or glyoxylic acid and 80 to 30% of an aqueous solution containing 90 to 100% water and 10 to 0% of a buffer agent pH=5.5.+-.1.5; and 80 to 20% of a continuous oil phase containing about 90 to 99 % of one or more saturated and liquid C.sub.6 -C.sub.16 hydrocarbons, and 10 to 1% of an emulsifying system constituted by one or more water-in-oil emulsifying agents and process for the elimination of hydrogen sulphide.

Abstract: Aqueous aldehyde solutions for trapping hydrogen sulfide comprising 5 to 50% by weight of an aldehyde and 1 to 5% by weight, relative to the aldehyde solution of a formulation comprising10 to 80% by weight of an ester of oxalkylated alkylalkylenediamines, which may be quaternized and 20 to 90% by weight of water or of a C.sub.1 -C.sub.4 -alcohol.

Abstract: The invention concerns a process for producing cyclic ureas of the general formula (II): ##STR1## in which R is selected from the group comprising hydrogen atom and C.sub.1 -C.sub.4 alkyl radicals through condensation in aqueous medium at a pH of between 4 and 7 and at a temperature of between 40.degree. and 60.degree. C. of glyoxal with or without excess of a urea having the general formula (I):RNH--CO--NHR (I)in which R has the same meaning as above, said process being conducted in the presence of a catalytic amount of orthophosphoric acid.