Title: Process for preparation of groft ethene copolymer used as addition preventing deposition of wax in crude oil, and composition containing said crude oil and additive
Application Number: 85109012 Application Date: 1985.10.24
Publication Number: 1004668 Publication Date: 1986.11.05
Approval Pub. Date: 1989.09.06 Granted Pub. Date: 1989.09.06
International Classifi-cation: C08F291/06;C10L1/18
Applicant(s) Name: Societe Nationale Elf Aguitane Address:
Inventor(s) Name: Gilles Meunier;Rene Brouard
Attorney & Agent: WU DAJIAN QUAN JING
Abstract:
    The present invention provides grafted ethylene copolymers usable more especially as additives for inhibiting the depositions in crude oils. Said copolymer being formed of ethylene and at least one monomer with ethylenic unsaturation, chosen from vinyl esters of C2 to C18 monocarboxylic acids, the alkyl esters in the C1 to C12 range of unsaturated monocarboxylic acids from the C3 to C12 range and the alpha , beta -unsaturated dicarboxylic compounds, on which are fixed the grafts of a homo or copolymer of an alpha , beta -unsaturated monocarboxylic acid ester with at least one alkanol of a chain length equal to or greater than C12 and at least 20% of which is of a chain length equal to or greater than C22. Such copolymers may be used more especially as additives for inhibiting the deposition of paraffins and for improving the flow properties of the crude oils.
Time: 5
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