Chemistry of hydrocarbon compounds – Hydrate or production thereof
Patent
1995-05-24
1997-02-04
Caldarola, Glenn A.
Chemistry of hydrocarbon compounds
Hydrate or production thereof
585950, 95153, 137 3, 137 13, 166310, 166371, C07C 720, F17D 105, F15D 100
Patent
active
056000448
ABSTRACT:
A method for inhibiting the formation of clathrate hydrates in a fluid having hydrate forming constituents is disclosed. More specifically, the method 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 are substantially water soluble polymers formed from a N-substituted acrylamide having two nitrogen substituent groups, R.sub.1 and R.sub.2, where R.sub.1 is a hydrocarbon group having from one to ten carbon atoms and zero to four heteroatoms selected from the group consisting of nitrogen, oxygen, sulfur, and combinations thereof, and R.sub.2 is a hydrogen atom or a hydrocarbon group having from one to ten carbon atoms selected from the group consisting of carbon, nitrogen, oxygen, and sulfur; alternatively, R.sub.1 and R.sub.2 may be linked to produce a cyclic ring having ten atoms comprising a combination of between three and ten carbon atoms and zero to four heteroatoms selected from the group consisting of nitrogen, oxygen, sulfur, and combinations thereof. Some examples of such inhibitors include, but are not limited to, poly(N-ethylacrylamide), poly(N,N-diethylacrylamide), poly(N-methyl, N-acrylamide), poly(iso-propylacrylamide), poly(n-propylacrylamide), poly(N-cyclopentylacrylamide), poly(N-cyclohexylacrylamide), poly(acryloylpiperdine), poly(acryloylpiperdine), poly(acryloylmorpholine) and various N-substituted acrylamide copolymers.
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Berluche Enoch
Colle Karla S.
Costello Christine A.
Longo John M.
Oelfke Russell H.
Caldarola Glenn A.
Exxon Production Research Company
Griffin Walter D.
Tassel K. D. Van
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