Copolymers comprising ethylene, vinyl esters and esters of (meth)acrylic acid, their formulations and use as pour point depressant, wax inhibitor and flow enhancer for crude oils
AssigneeBASF SE
InventorsIvette Garcia Castro, Stefan Frenzel, Maria Heuken, Jennifer Jackson
Life of this patent
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Abstract
Copolymers comprising ethylene, vinyl esters, in particular vinyl acetate and esters of (meth)acrylic acid, selected from esters comprising branched alkyl, cyclic alkyl or optionally alkyl substituted aryl moieties and having a weight average molecular weight of 35,000 g/mol to 150,000 g/mol, formulations of such copolymers in organic solvents and their use as pour point depressant, wax inhibitor and flow enhancer for crude oils.
Claims21
A method comprising adding a pour point depressant for crude oil comprising a copolymer (A) to the crude oil;
- wherein the copolymer (A) comprises
- (M1) 83.5 mol % to 96.5 mol % of ethylene,
- (M2) 3 mol % to 11.5 mol % of at least one vinyl ester of the formula H2C═CH—O—(O)C—R1 (I) where R1 is H or a C1- to C4 alkyl moiety, and
- M3) 0.5 mol % to 5 mol % of a (meth)acrylate of the formula H2C═C(R2)—COOR3 wherein R2 is H or methyl, and R3 is selected from the group consisting of
- R3a:
- branched alkyl moieties having 4 to 18 carbon atoms,
- R3b:
- cyclic alkyl moieties having 5 to 12 carbon atoms, and
- R3c:
- aryl moieties having 6 to 12 carbon atoms which are optionally alkyl substituted,
- and wherein the copolymer (A) has a weight average molecular weight Mw of 35,000 g/mol to 150,000 g/mol.
A method comprising adding a formulation comprising at least one copolymer (A) and an organic solvent to crude oil;
- wherein the copolymer (A) comprises
- (M1) 83.5 mol % to 96.5 mol % of ethylene,
- (M2) 3 mol % to 11.5 mol % of at least one vinyl ester of the formula H2C═CH—O—(O)C—R1 (I) where R1 is H or a C1- to C4 alkyl moiety, and
- (M3) 0.5 mol % to 5 mol % of a (meth)acrylate of the formula H2C═C(R2)—COOR3 wherein R2 is H or methyl, and R3 is selected from the group consisting of
- R3a:
- branched alkyl moieties having 4 to 18 carbon atoms,
- R3b:
- cyclic alkyl moieties having 5 to 12 carbon atoms, and
- R3c:
- aryl moieties having 6 to 12 carbon atoms which are optionally alkyl substituted,
- and wherein the copolymer (A) has a weight average molecular weight Mw of 35,000 g/mol to 150,000 g/mol.
A method comprising adding a rheology modifier comprising at least one formulation comprising a copolymer (A) and an inorganic solvent to crude oil;
- wherein the copolymer (A) comprises
- (M1) 83.5 mol % to 96.5 mol % of ethylene,
- (M2) 3 mol % to 11.5 mol % of at least one vinyl ester of the formula H2C═CH—O—(O)C—R1 (I) where R1 is H or a C1- to C4 alkyl moiety, and
- (M3) 0.5 mol % to 5 mol % of a (meth)acrylate of the formula H2C═C(R2)—COOR3 wherein R2 is H or methyl, and R3 is selected from the group consisting of
- R3a:
- branched alkyl moieties having 4 to 18 carbon atoms,
- R3b:
- cyclic alkyl moieties having 5 to 12 carbon atoms, and
- R3c:
- aryl moieties having 6 to 12 carbon atoms which are optionally alkyl substituted ,
- and wherein the copolymer (A) has a weight average molecular weight Mw of 35,000 g/mol to 150,000 g/mol.
Dependencies are inferred from the claim text.