Abstract: The present invention relates to an improved polyethylene modified asphaltic composition and a method for its manufacture. More specifically, when certain linear polyethylene compounds are added to an asphalt that is low in asphaltenes but relatively high in saturates, there results a composition which has excellent storage stability, phase compatibility and creep resistance relative to unmodified asphalts. The improved asphaltic composition is particularly well suited for use as a binder in paving materials and as a coating or saturant for roofing products.
Abstract: Certain polyhydric alcohols have been found to be effective in reducing the loss of certain amine oxides from liquid hydrocarbon fuels such as gasoline.
Abstract: The use of oxidants such as hydroperoxides in a lubricating oil have been found to be effective in reducing the war of one or more metal and/or ceramic surfaces in contact with an advanced ceramic surface. The reduced wear may be obtained in the absence of conventional antiwear additives such as zinc dialkyldithiophosphate.
Type:
Grant
Filed:
March 1, 1988
Date of Patent:
May 2, 1989
Assignee:
Exxon Research and Engineering Company
Inventors:
Jacob J. Habeeb, Alan G. Blahey, William N. Rogers
Abstract: This invention relates to a catalyst suitable for use in a fluid catalytic process and a method of using the catalyst on hydrocarbons containing one or more poison metal of vanadium or nickel to convert the hydrocarbons to lower boiling fractions. The catalyst contains a particulate and substantially water-insoluble strontium compound (in addition to a conventional zeolite and catalyst matrix) which reacts with and traps the metal poison to preserve the structure of the zeolite and, in addition, lowers the coke make and hydrogen production.
Abstract: A method for manufacturing a lubricating grease having improved properties is described. The method comprises reacting a pyrrolidone with a fatty amine and subsequently adding a metal hydroxide to the reaction when the unreacted fatty amine content ranges between about 33 and about 66 wt. % of the fatty amine originally added. The grease thus formed will be a NLGI #0 grade grease that has the high temperature stay-in-place properties of a NGLI #2 grade grease.
Type:
Grant
Filed:
April 13, 1987
Date of Patent:
April 18, 1989
Assignee:
Exxon Research and Engineering Company
Inventors:
James H. Norton, William Nywening, Phillip W. Brewster, A. Gordon Alexander
Abstract: A grease composition having improved load-carrying capability is disclosed. More specifically, the load-carrying capability of a grease is increased when a polyhydric alcohol having at least three hydroxy groups and at least two metal hydrocarbylthiophosphate compounds in which the metal is different in at least two compounds are incorporated into said grease. Glycerol is a preferred polyhydric alcohol while antimony dialkyldithiosphosphate and zinc dialkyldithiophosphate are preferred hydrocarbylthiophosphate compounds.
Abstract: An improved method for producing a hydrotreated oil from a naphthenic feed is described. The process comprises passing the naphthenic feed through the multistage hydrotreating process with intermediate removal of hydrogen sulfide and/or ammonia.
Type:
Grant
Filed:
March 18, 1986
Date of Patent:
January 31, 1989
Assignee:
Exxon Research and Engineering Company
Inventors:
Blaine G. Corman, Paul F. Korbach, Kenneth M. Webber
Abstract: A lube oil and method of making same having improved anti-wear properties is described. The lube oil comprises:A. a basestock;B. a diphenyl carbonate; andC. a metal dialkyldithiophosphate salt.
Abstract: It has been found that when minor amounts of quaternary ammonium hydroxides are added to gasolines, the octane requirement increase for fuel fired spark ignition internal combustion engines is decreased or reversed.Thus, in one aspect, the present invention comprises a method for controlling the ORI of spark ignition internal combustion engines by operating such engines on a fuel containing certain quaternary ammonium hydroxides in amounts sufficient to control the ORI.
Abstract: The oxidation stability of a refined hydrocarbon oil can be sigificantly improved by adding at least one cyclic sulfide and at least one aromatic compound to said oil.
Abstract: A lube oil composition having improved antiwear and friction reducing properties, together with a method for manufacturing same, are described. The lube oil comprises:A. a basestock;B. a metal phosphate;C. a metal carbamate; andD. a para alkyl hydroxy-aryl sulfide.
Abstract: A wax-containing petroleum distillate fuel composition having improved low temperature flow properties is described. The distillate fuel has added thereto:A. an amorphous, normally solid, essentially saturated hydrocarbon fraction substantially free of normal paraffin hydrocarbons;B. a wax modifying random copolymer of ethylene and an unsaturated ester; andC. an ether.
Abstract: The present invention is directed at a grease composition comprising:A. an oil component having a major amount of a synthetic fluid having a viscosity of at least 50 cSt at 40.degree. C. and a minor amount of a mineral oil having a pour point below -20.degree. C.; andB. a thickener.The oil component of the grease composition preferably comprises between about 30 and 90 wt. % synthetic oil, more preferably between about 40 and about 80 wt. % synthetic oil and from 70 to 10 wt. % and preferably 60 to 20 wt. % mineral oil. The viscosity of the synthetic oil preferably is at least 50 cSt, more preferably at least 100 cSt at 40.degree. C. The synthetic oil preferably is selected from polyolefins, esters, polyesters, high VI isoparaffins, and mixtures thereof, with polyalphaolefins being particularly preferred. The polyalphaolefins preferably comprise C.sub.8 and C.sub.12 monoalphaolefin building blocks.
Abstract: A middle distillate hydrocarbon fuel boiling in the range of about 160.degree. C. to about 400.degree. C. having an improved cetane number is disclosed. The fuel comprises at least about 3 weight percent oxygenated compounds preferably at least about 3 weight percent oxygenated aromatic compounds. The oxygenated compounds preferably comprise alkylaromatics and/or hydroaromatics, preferably oxygenated at the benzylic carbon position.
Abstract: An asphaltic composition having improved temperature susceptibility and a method of manufacturing the improved asphaltic composition are disclosed. The improvement is directed at the addition of a stabilizing agent selected from the group consisting of Group IA sulfates, Group IIB sulfates and mixtures thereof.
Type:
Grant
Filed:
April 21, 1986
Date of Patent:
December 8, 1987
Assignee:
Exxon Research and Engineering Company
Inventors:
Helen R. Gorter, Lyle E. Moran, Warren D. Robertson, Shaunalea Savard
Abstract: A lube oil and method of making same having improved anti-wear properties is described. The lube oil comprises:A. a basestock;B. a diphenyl carbonate; andC. a metal dialkyldithiophosphate salt.
Abstract: The combination of copper and molybdenum salts is shown to be an effective antioxidant and anti-wear additive for hydrocarbons, such as lube oils. Accordingly the present invention is directed to a lube oil having improved oxidation stability, providing improved wear protection with reduced friction and comprising:A. a basestock, andB. an effective amount of a copper salt and a molybdenum salt.
Abstract: A fluidized bed process is disclosed which comprises subjecting a bed comprised of solid particulate magnetizable, fluidizable material within an external force field wherein at least a portion of the bed containing said solid particulate magnetizable and fluidizable material and fluidizing fluid are subjected to a nontime varying and substantially uniform applied magnetic field having a substantial component along the direction of the external force field such that said solid particulate magnetizable and fluidizable material has a component of magnetization along the direction of the external force field and wherein at least a portion of said bed containing the solid particulate magnetizable and fluidizable material is fluidized by a flow of fluid opposing said external force field at a superficial fluid velocity ranging between:(a) more than the normal minimum fluidization superficial fluid velocity required to fluidize said bed in the absence of said applied magnetic field; and,(b) less than the superficia
Abstract: Solids comprising a magnetically stabilized fluidized bed are transported in a direction transverse to the flow of the fluidizing fluid exiting the bed by contacting at least a portion of said solids with fluidizing fluid which enters the bed with a velocity component in the direction of solids flow; i.e. the transverse flow direction. In a preferred embodiment, the fluidizing fluid entering the bed is passed through a distribution means containing propulsion passages slanted in the desired direction of solids flow which serve to orient the fluidizing fluid in the transverse flow direction. Use of this invention eliminates the need for the costly and inconvenient pneumatic, hydraulic and mechanical transport devices employed in the prior art. Solids attrition and elutriation are also reduced.
Abstract: In a magnetically stabilized fluidized bed in which the bed particles continuously move transverse to the flow of the fluidizing fluid, the bed particles have increased fluidity when the bed is operated at or substantially near the locus of transition between the bubbling and stabilized regimes of said bed. More specifically, the particulate bed comprising a transverse flow magnetically stabilized fluidized bed process has greater fluidity when the bed is operated such that the ratio of the difference between the transition velocity and the operating velocity to the difference between the transition velocity and the normal minimum fluidization velocity ranges between -0.1 and +0.5. The increased fluidity facilitates the movement of solids within a vessel as well as the transfer of solids to other vessels.
Type:
Grant
Filed:
February 2, 1982
Date of Patent:
October 1, 1985
Assignee:
Exxon Research and Engineering Co.
Inventors:
Jeffrey H. Siegell, Costas A. Coulaloglou