Chemistry of hydrocarbon compounds – Product blend – e.g. – composition – etc. – or blending process... – With nonhydrocarbon additive
Patent
1992-07-09
1993-05-25
McFarlane, Anthony
Chemistry of hydrocarbon compounds
Product blend, e.g., composition, etc., or blending process...
With nonhydrocarbon additive
585 12, 585 13, 208 44, 252 56D, C07C 720, C10L 116, C10L 120, C10M10104
Patent
active
052142248
ABSTRACT:
Dispersing asphaltenes in liquid hydrocarbons, particularly formed during the refining of crude petroleum, is disclosed. The dispersant comprises a free radically polymerized copolymer of an .alpha.-olefin of from about 10 to about 36 carbon atoms and maleic anhydride wherein the anhydride moieties along the copolymer backbone are substantially unhydrolyzed or otherwise not derivatized. The copolymer has a ratio of .alpha.-olefin to maleic anhydride of from about 1:1 to about 1:5 and a molecular weight of from 5000 to about 100,000. Alternatively the dispersant comprises a mixture of the .alpha.-olefin/maleic anhydride copolymer and an alkyl substituted phenol/formaldehyde liquid polymer, such as nonyl phenol/formaldehyde polymer, or a lipophilic/hydrophilic vinylic polymer, such as hydroxyethyl methacrylate/lauryl acrylate copolymer. Also disclosed is a liquid hydrocarbon dispersion containing asphaltenes and 1-100 ppm of the .alpha.-olefin/maleic anhydride copolymer.
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Comer David G.
Stephenson W. Kirk
Lundeen Daniel N.
McFarlane Anthony
Miller Robert A.
Phan Nhat D.
Pryzant Andrew S.
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