Abstract A low pour point fuel oil blend is prepared from a major amount of a high pour point, low sulfur, waxy, residual fuel and a minor amount of low-waxy, low pour, residual fuel oil by adding thereto from 0.01 to 0.5 percent by weight of an oil soluble ethylenevinyl fatty acid ester copolymer in which the fatty acid component of the ester has a carbon content of from about 2 to about 6; the copolymer having a molecular weight between about 20,000 and 31,000, a melt index of about 5 to about 28 and a vinyl fatty acid ester content of from about 24 to about 34 percent. The copolymer may be added either in a water-glycol emulsion or in a hydrocarbon to one of the blend components which has been heated to between about 200* to 400*F.
A fuel oil blend characterized by a lowered pour point and a low sulfur content comprising a major amount of a high pour, waxy, residual fuel oil having a pour point of between about 80* and 120*F. and a minor amount of a low waxy, low pour, residual fuel oil and an effective pour depressant amount of an oil soluble, ethylene-vinyl fatty acid ester copolymer in which the fatty acid component of the ester has a carbon content of from about two to about six, said copolymer having a molecular weight of between about 20,000 to about 31,000; a vinyl fatty acid ester content of from about 24 to 34 percent, and a melt index of about 5 to about 28.
Claim 2
Dependent Claim
31 words
The composition according to claim 2 wherein the said vinyl ester is vinyl acetate and wherein the said composition contains over 50 percent by volume of the said high-pour fuel oil.
Claim 3
Dependent Claim
24 words
The composition according to claim 2 wherein said copolymer is present in a concentration ranging from about 0.01 to about 0.5 percent by weight.
Claim 4
Dependent Claim
27 words
The composition of claim 2 containing 60 percent by volume of said high pour fuel oil and 40 percent by volume of said low pour fuel oil.
Claim 5
Dependent Claim
136 words
The composition of claim 2, wherein said high pour, residual fuel oil has an API gravity ranging between about 20.0 and about 25.0; a sulfur content between about 0.40 weight percent and about 0.96 weight percent; a Furol viscosity at 122*F. of about 60 to about 230; a flash point of between 300* and 450*F. and a wax content of between about 10 and 20 percent; said low waxy, low pour residual fuel oil having an API gravity of about 10.0 to about 15.0; a Furol viscosity at 122*F. of about 150 to about 250; a flash point of about 220 to about 350*F.; a pour point of about 25*F. and 45*F.; a wax content of about 2 to about 5 weight percent and a sulfur content of between about 0.50 and about 0.90 weight percent.