C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 7/20 (2006.01) C08F 220/54 (2006.01) C08F 226/02 (2006.01) C09K 8/52 (2006.01) C10L 3/00 (2006.01) C10L 3/10 (2006.01) C10L 10/00 (2006.01) F17D 1/05 (2006.01)
Patent
CA 2178366
Novel copolymers of N-vinyl amides and acrylamides and N-allyl amides and acrylamides are useful for inhibiting the formation of clathrate hydrates in a fluid having hydrate forming constituents. More specifically, the novel copolymers can be used in treating a petroleum fluid stream such as natural gas conveyed in a pipe to inhibit the formation of a hydrate restriction in the pipe. The hydrate inhibitors used for practicing the method of the present invention comprise substantially water soluble polymers having N-vinyl amide or N-allyl amide units. The novel copolymers have at least either an N-vinyl amide monomeric unit or an N-allyl amide monomeric unit in combination with an acrylamide monomeric unit. Some novel copolymers of interest, particularly as hydrate inhibitors, include N-methyl-N-vinylacetamide copolymerized with acryloylpyrrolidine, methacryloylpyrrolidine or N-isopropylmethacrylamide.
Berluche Enock
Colle Karla Schall
Costello Christine Ann
Oelfke Russell Harlan
Talley Larry Dalton
Borden Ladner Gervais Llp
Exxon Production Research Company
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