A method for preventing or retarding the formation of gas...

C - Chemistry – Metallurgy – 07 – C

Patent

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C07C 7/20 (2006.01) C08K 5/04 (2006.01) C09K 8/52 (2006.01) C10L 1/14 (2006.01) C10L 3/00 (2006.01) C10L 3/06 (2006.01) C10L 1/18 (2006.01) C10L 1/22 (2006.01)

Patent

CA 2270998

A composition for preventing or retarding the formation of gas hydrates or for reducing the tendency of gas hydrates to agglomerate, during the transport of a fluid comprising water and a hydrocarbon, through a conduit, comprising, (a) a polymer or copolymer selected from a terpolymer of vinyl pyrrolidone, vinyl caprolactam and an ammonium derivative monomer having from 6 to 12 carbon atoms, selected from the group consisting of dialkyl aminoalkyl methacrylamide, dialkyl dialkenyl ammonium halide and a dialkylamino alkyl acrylate or methacrylate, a copolymer of vinyl pyrrolidone and vinyl caprolactam, and a homopolymer of vinyl caprolactam, and (b) an alcohol containing three to five carbon atoms and one hydroxy group, or a low molecular weight glycol ether containing an alkoxy group having at least 3 carbon atoms.

La présente invention a pour objet une composition visant à empêcher ou à retarder la formation d'hydrates de gaz ou à réduire leur tendance à s'agglomérer, pendant le transport, dans un conduit, d'un fluide composé d'eau et d'un hydrocarbure. Ladite composition est constituée des éléments suivants: (a) un polymère ou un copolymère sélectionné à partir d'un copolymère triple de pyrrolidone de vinyle, de caprolactame de vinyle et d'un monomère dérivé d'ammonium comprenant entre 6 et 12 atomes de carbone, sélectionné dans le groupe constitué par méthacrylamide dialkyle aminoalkyle, halogénure d'ammonium dialkyle dialcényle et un acrylate ou méthacrylate dialkylamino-alkyle, un copolymère de pyrrolidone de vinyle et de caprolactame de vinyle, et un homopolymère de caprolactame de vinyle; et (b) un alcool contenant entre 3 et 5 atomes de carbone et un groupe hydroxy, ou un éther glycolique à faible masse moléculaire contenant un groupe alcoxy d'au moins 3 atomes de carbone.

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