US 4,210,424 A · Combination of ethylene polymer, normal paraffinic wax and nitrogen containing compound (stabilized, if desired, with one or more compatibility additives) to improve cold flow properties of distillate fuel oils

Abstract

Oil-soluble combinations of (A) ethylene polymer or copolymer, (B) normal paraffinic wax composed of normal hydrocarbons whose average molecular weight is within the range of from 300 to 650, and (C) nitrogen compounds, such as amides, amine salts and ammonium salts, of carboxylic acids or anhydrides, are useful in improving the cold flow properties of distillate hydrocarbon fuel oils. Preferably, the wax contains n-paraffins ranging from C.sub.23 to C.sub.37 inclusive. If desired, the combination can be usefully stabilized by the addition of one or more compatibility additives, i.e. a polymer having alkyl side chains of 6 to 30 carbon atoms and derived from carboxylic acid esters and/or olefins or C.sub.8 -C.sub.18 alkanol, e.g. tridecyl alcohol or mixtures of said polymer and alkanol.

Claims18

Dependent claims

A wax-containing petroleum fuel oil comprising a major proportion of a distillate oil boiling in the range of 120.degree. to 425.degree. C., which fuel oil has been improved in its low temperature flow properties, containing in the range of about 0.001 to 2.5 wt. %, based on the weight of the total composition, of a flow improving combination of:

(A) one part by weight of an oil-soluble ethylene backbone distillate flow improving polymer having a number average molecular weight in the range of about 500 to 50,000;
(B) 0.1 to 30 parts by weight of wax comprising principally n-paraffins having from 20 to 60 carbons;
and
(C) 0.01 to 10 parts by weight of an oil-soluble nitrogen compound containing a total of about 30 to 300 carbon atoms and having at least one straight chain alkyl segment of 8 to 40 carbons, and selected from the class consisting of amine salts and/or amides of hydrocarbyl carboxylic acids or anhydrides having 1 to 4 carbonyl groups.

1 more element

An additive concentrate useful for treating distillate fuel oils to improve their cold flow properties comprising about 20 to 90 wt. % of a diluent oil and about 80 to 10 wt. % of an additive combination of:

(A) one part by weight of an oil-soluble ethylene backbone distillate flow improving polymer having a number average molecular weight in the range of about 500 to 50,000;
(B) 0.1 to 30 parts by weight of n-paraffins having from 20 to 60 carbons;
(C) 0.1 to 10 parts by weight of an oil-soluble nitrogen compound containing a total of about 30 to 300 carbon atoms and selected from the class consisting of amine salts and/or amides of a C.sub.4 to C.sub.30 hydrocarbyl carboxylic acid or anhydride having 1 to 4 carbonyl groups, said compound having at least one straight chain alkyl segment of 8 to 40 carbon atoms, having in addition from 0.1 to 10 parts by weight of an auxiliary compatibility agent of the class consisting of a second oil-soluble polymer (D) having a molecular weight in the range of about 1000 to 200,000 wherein at least 10% by weight of said polymer is in the form of straight chain alkyl groups having 6 to 30 carbon atoms, said polymer comprising unsaturated ester and/or olefin moieties, said moieties comprising a major weight proportion of said polymer, a C.sub.8 to C.sub.18 alkanol (E) and mixtures thereof.

Dependencies are inferred from the claim text.

Combination of ethylene polymer, normal paraffinic wax and nitrogen containing compound (stabilized, if desired, with one or more compatibility additives) to improve cold flow properties of distillate fuel oils

Life of this patent

Combination of ethylene polymer, normal paraffinic wax and nitrogen containing compound (stabilized, if desired, with one or more compatibility additives) to improve cold flow properties of distillate fuel oils

Life of this patent

Abstract

Claims18