Disclosed are pour point depressants used in compositions and methods for achieving the cold flow properties of synthetic feedstock derived from plastic. A method of obtaining the synthetic feedstock is also disclosed, which includes heating plastic under substantially oxygen free conditions at a temperature of from about 400? C. to about 850? C. to produce a pyrolysis effluent, condensing the heated a pyrolysis effluent to obtain a synthetic feedstock, recovering the synthetic feedstock, and adding a pour point depressant to the synthetic feedstock to lower the pour point.

A composition including a pyrolysis oil and, as an additive, one or more of: (a) an aldehyde-alkylphenol copolymer and/or an aldehyde-alkylphenol-polyamine copolymer, wherein the alkylphenol of the copolymer comprises an alkyl group having at least 30 carbon atoms; and (b) the reaction product of an alcohol and/or amine with a copolymer of an alpha-olefin and an ethylenically unsaturated carboxylate compound, wherein the alpha-olefin and/or the alcohol and/or amine has at least 30 carbon atoms. A method of reducing the pour point of a composition including a pyrolysis oil and a use of the aforementioned additives for reducing the pour point of a composition comprising a pyrolysis oil, are also disclosed.

An additive composition improves the stability and the engine performances of gas oils, including gas oils of the non-road type in compliance with the decree of 10 Dec. 2010. The additive composition includes: at least one metal deactivator or chelating agent, at least one antioxidant of the hindered phenol type (alkylphenol), at least one dispersant and/or detergent, and at least one metal passivator, wherein the composition includes improved properties, in particular relative to the oxidation resistance, storage stability, thermal stability, reduction in fouling of the injectors, reduction in loss of power, reduction in the tendency of filters to clog.

Described herein are associative polymers capable of controlling formation of particulate matter from a non-polar ignitable composition upon ignition of the non-polar ignitable composition, alone or in combination with control of a physical and/or chemical property of the non-polar compositions and related compositions, methods and systems. Associative polymers herein described have a non-polar backbone and functional groups presented at ends of the non-polar backbone, with a number of the functional groups presented at the ends of the non-polar backbone formed by associative functional groups capable of undergoing an associative interaction with another associative functional group with an association constant (k) such that the strength of each associative interaction is less than the strength of a covalent bond between atoms and in particular less than the strength of a covalent bond between backbone atoms.

Described herein are associative polymers capable of controlling formation of particulate matter from a non-polar ignitable composition upon ignition of the non-polar ignitable composition, alone or in combination with control of a physical and/or chemical property of the non-polar compositions and related compositions, methods and systems. Associative polymers herein described have a non-polar backbone and functional groups presented at ends of the non-polar backbone, with a number of the functional groups presented at the ends of the non-polar backbone formed by associative functional groups capable of undergoing an associative interaction with another associative functional group with an association constant (k) such that the strength of each associative interaction is less than the strength of a covalent bond between atoms and in particular less than the strength of a covalent bond between backbone atoms.

The use of a copolymer as a detergent additive in an internal combustion engine liquid fuel. The copolymer obtained by copolymerization of at least: an alkyl acrylate or alkyl methacrylate monomer ma and a styrenic monomer mb chosen from styrenics derivatives, the aromatic ring of which is substituted by at least one group R or at least one linear or branched C.sub.1 to C.sub.12 hydrocarbon-based chain substituted by at least one group R being chosen from: the hydroxyl group, a group OR, a group (OC.sub.yH.sub.2yO).sub.fH, a group (OC.sub.yH.sub.2yO).sub.fR, a group O(CO)R, and a group (CO)OR, where y is an integer ranging from 2 to 8, f is an integer ranging from 1 to 10, and R is chosen from C.sub.1 to C.sub.24 alkyl chains. Also, a process for maintaining the cleanliness of and/or for cleaning at least one of the internal parts of an internal combustion engine.

The invention relates to a specific copolymer obtainable by co-polymerizing at least the following monomers: at least one bicyclic (meth)acrylate esterat least one C8-C24-alkyl (meth)acrylateoptionally, and preferably, at least one aromatic vinyl monomer; and optionally other ethylenically unsaturated monomers, whereby the copolymer has a weight averaged molecular weight from 400,000 to 50,000,000 Dalton, as well as to the way to synthesize them and the use of such polymers to modify the rheology of a liquid in which they are soluble.

The invention relates to specific copolymers obtainable by co-polymerizing at least the following monomers: at least one bicyclic (meth)acrylate ester at least one lower-alkyl (meth)acrylate optionally, and preferably, at least one aromatic vinyl monomer; and optionally other ethylenically unsaturated monomers, whereby the copolymer has a weight averaged molecular weight of from 100,000 to 10,000,000 D, determined using GPC-MALS techniques for a solution in THF at 40 C., as well as to the way to synthesize such copolymers and the use of such polymers to modify the rheology of a liquid in which they are soluble.

In one embodiment, an alkylphenol copolymer is disclosed wherein the copolymer comprises at least one alkylphenol monomer and the alkylphenol copolymer exhibits the following: an oscillation displacement of greater than 0 at a temperature of 5 C. in a first oscillation temperature sweep and an oscillation displacement in a second oscillation temperature sweep within 25% of the oscillation displacement in the first oscillation temperature sweep at a temperature of 5 C. In a further embodiment, a petroleum composition is disclosed wherein the composition comprises a petroleum source and a macromolecular compound wherein the macromolecular compound exhibits the following: an oscillation displacement of greater than 0 at a temperature of 10 C. in a first oscillation temperature sweep, and an oscillation displacement in a second oscillation temperature sweep within 25% of the oscillation displacement in the first oscillation temperature sweep at a temperature of 10 C.

In one embodiment, an alkylphenol copolymer is disclosed wherein the copolymer comprises at least one alkylphenol monomer and the alkylphenol copolymer exhibits the following: an oscillation displacement of greater than 0 at a temperature of 5 C. in a first oscillation temperature sweep and an oscillation displacement in a second oscillation temperature sweep within 25% of the oscillation displacement in the first oscillation temperature sweep at a temperature of 5 C. In a further embodiment, a petroleum composition is disclosed wherein the composition comprises a petroleum source and a macromolecular compound wherein the macromolecular compound exhibits the following: an oscillation displacement of greater than 0 at a temperature of 10 C. in a first oscillation temperature sweep, and an oscillation displacement in a second oscillation temperature sweep within 25% of the oscillation displacement in the first oscillation temperature sweep at a temperature of 10 C.