Chemistry of hydrocarbon compounds – Hydrate or production thereof
Patent
1994-09-15
1996-02-13
Pal, Asok
Chemistry of hydrocarbon compounds
Hydrate or production thereof
137 3, 137 13, 166310, 166371, 585950, C07C 720, F17D 105
Patent
active
054912695
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 cyclic imino ether. Some examples of such inhibitors include various N-acyl polyalkyleneimines, such as N-acyl substituted polyethyleneimine, N-acyl substituted polypropyleneimine, N-acyl substituted polybutyleneimine, N-acyl substituted polypentyleneimine and copolymers thereof. Also, such N-acyl substituted polyalkyleneimines can be used in various ratios with other substantially water soluble polymers and copolymers. Preferably, a solvent such as water, brine, alcohol, or mixtures thereof is used to produce an inhibitor solution or mixture to facilitate treatment of the petroleum fluid stream.
REFERENCES:
patent: 3741961 (1973-06-01), Kmiecik et al.
patent: 4203900 (1980-05-01), Kaiser
patent: 4354029 (1982-10-01), Kaiser et al.
patent: 4856593 (1989-08-01), Matthews et al.
patent: 4915176 (1990-04-01), Sugier et al.
patent: 4973775 (1990-11-01), Sugier et al.
patent: 5076364 (1991-12-01), Hale et al.
patent: 5076373 (1991-12-01), Hale et al.
patent: 5244878 (1993-09-01), Sugier et al.
patent: 5331105 (1994-07-01), Duncum et al.
patent: 5420370 (1995-05-01), Sloan, Jr.
patent: 5432292 (1995-07-01), Sloan, Jr.
U.S. patent application Ser. No. 07/979,588 by E. D. Sloan, Jr., filed Nov. 20, 1992.
U.S. CIP patent application Ser. No. 08/083,108 by E. D. Sloan, Jr., filed Jun. 24, 1993.
"Recent Syntheses and Reactions of Cyclic Imidic Esters," Seeliger et al., Angew. Chem. Int. Ed., vol. 5, No. 10, 875-88 (1966).
"Block Copolymers from Cyclic Imino Ethers: A New Class of Nonionic Polymer Surfactant," Kobayashi et al., Macromolecules, vol. 19, p. 535, (1986).
"Influence of the Formation of Crystal Hydrates of Liquids and Gases," Krasnov, Source Not Supplied, No. 81094.4, UDC 622.324.5:661.181.1.002.614, Publication Date Unknown.
"Effect of Surfactants on Hydrate Formation Kinetics," Kalogerakis et al. SPE 1993 International Oilfield Chemistry Symposium (new Orleans, Mar. 2-May 1993) Proceedings 375-83 (1993).
"Surfactants in Oil Production," Muijs, R. Soc. Chem., (Chemical Oil Ind. Developments & Applications) V 97, 277-97, 1991.
"A Molecular Mechanism for Gas Hydrate Nucleation from Ice," Sloan, et al. AIChE Journal, vol. 37, No. 9, 1281-92, (Sep. 1991).
"Surfactants Studies as Hydrate-Formation Inhibitors," Kuliev et al., Gazovoe Delo (1972), (10), 17-19. (Translation enclosed).
"Effect of Lower Alcohols on Formation of Crystallohydrates of Liquids and Gases," Krasnov, Gazovoe Delo (1966), (12), 9-11 (Translation enclosed).
"Clathrate Hydrates," P. Englezos, Ind. Eng. Chem. Res. 1993, 32, 1251-1274.
"Recent Developments in Gas Dehydration and Hydrate Inhibition," Hubbard et al., SPE 21507, pp. 263-276 (1991).
"Natural Gas Hydrate Phase Equilibria and Kinetics: Understanding the State of The Art," Sloan, Revue de l'Institut Francais du Petrole, (continued) vol. 45, No. 2, Mars-Avril 1990. Presented Jun. 8, 1989.
Colle Karla S.
Oelfke Russell H.
Exxon Production Research Company
Pal Asok
Tassel K. D. Van
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