Lubrication base oil composition comprising at least 95 wt % saturates, of which saturates fraction between 19 and 30 wt % are cyclo-paraffins and the remainder being n-and iso-paraffins, said composition having a viscosity index of above 120 and a pour point of below -15 °C.

Base oil composition

A premium synthetic lubricant having antiwear properties comprises a synthetic isoparaffinic hydrocarbon base stock and an effective amount of at least one antiwear additive. The antiwear additive is preferably at least one of a metal phosphate, a metal dialkyldithiophosphate, a metal dithiophosphate, a metal thiocarbamate, a metal dithiocarbamate, an ethoxylated amine dialkyldithiophosphate and an ethoxylated amine dithiobenzoate. Metal dialkyldithiophosphates are preferred, particularly zincdialkyldithiophosphate (ZDDP). The base stock is derived from a waxy, Fischer-Tropsch synthesized hydrocarbon feed fraction comprising hydrocarbons having an initial boiling point in the range of about 650-750 °F, by a process which comprises hydroisomerizing the feed and dewaxing the isomerate. The lubricant may also contain hydrocarbonaceous and synthetic base stock material in admixture with the Fischer-Tropsch derived base stock.

Premium wear resistant lubricant

A liquid hydrocarbon composition, containing paraffinic hydrocarbon components in which the extent of branching, as measured by the percentage of methyl hydrogens (BI), and the proximity of branching, as measured by the percentage of recurring methylene carbons which are four or more carbons removed from an end group or branch (CH2⊃4), are such that: (a) BI - 0.5(CH2⊃4)⊃15; and (b) BI + 0.85(CH2⊃4)∫45 as measured over said liquid hydrocarbon composition as a whole.

Isoparaffinic lube basestock compositions

A premium synthetic lubricating oil base stock having a high VI and low pour point is made by hydroisomerizing a Fischer-Tropsch synthesized waxy, paraffinic feed wax and then dewaxing the hydroisomerate to form a 650-750° F.+ dewaxate. The waxy feed has an initial boiling point in the range of about 650-750° F., from which it continuously boils up to at least 1050° F. and has a T90−T10 temperature difference of at least 350° F. The feed is preferably hydroisomerized without any pretreatment, other than optional fractionation. The 650-750° F.+ dewaxate is fractionated into two or more base stocks of different viscosity.

Premium synthetic lubricant base stock having at least 95% non-cyclic isoparaffins

The present invention relates to plasticized polyolefin compositions comprising a polyolefin and a non-functionalized hydrocarbon plasticizer.

Plasticized polyolefin compositions

Fischer-Tropsch wax is converted to a lubricating oil having a high viscosity index and a low pour point by first hydrotreating the wax under relatively severe conditions and thereafter hydroisomerizing the hydrotreated wax in the presence of hydrogen on a particular fluorided Group VIII metal-on-alumina catalyst. The hydroisomerate is then dewaxed to produce a premium lubricating oil base stock.

Process for the hydroisomerization of fischer-tropsch wax to produce lubricating oil

A process for selectively producing middle distillate fuel products from paraffin waxes such as slack wax and Fischer-Tropsch wax by hydroisomerizing (in R-1) the wax to convert 60-95 weight percent per pass of the 700+°F (371.1+°C) fraction contained in said wax. The catalyst employed is a fluorided Group VIII metal-on-alumina catalyst wherein the fluoride within the catalyst is present predominately as aluminum fluoride hydroxide hydrate. The preferred Group VIII metal is platinum.

Process for the hydroisomerization of wax to produce middle distillate products

Aromatic molecules are alkylated using a silica-alumina catalyst derived from zeolite. The silica-alumina catalyst is a partially collapsed zeolite, i.e., a material of reduced crystallinity. The alkylation process which employs this material of reduced crystallinity is characterized by a high level of selectivity for the production of monoalkylated product.

Alkylation of aromatic molecules using a silica-alumina catalyst derived from zeolite

In the production of alkylaromatics by the alkylation of aromatic hydrocarbons with alkylating agents such as olefins typically in the presence of a catalyst, the unconverted aromatic hydrocarbon remaining after completion of the alkylation process is separated from the alkylaromatic product and the terminal alkylaromatic isomers are separated from the mixture of alkylaromatic isomers produced in the alkylation process by the selective permeation of the aromatic hydrocarbon and the terminal isomers through a permselective membrane, preferably an asymmetric membrane producing a permeate rich in the terminal isomers and a retentate which is lean (i.e., depleated) in the terminal isomers. Permeation is under reverse osmosis conditions, that is, under a pressure sufficient to at least overcome the osmotic pressure of the aromatic hydrocarbon present in the mixture made up of the aromatic hydrocarbon, the olefin and the mixed isomer alkylaromatic product. Permeation is carried out at a pressure of about 100 to 800 psig, preferably a pressure of about 200 to 600 psig, more preferably a pressure of about 300 to 500 psig, at a temperature of about 0° to 100° C., preferably about 20°-80° C., most preferably about 20° to 50° C. The membrane of choice is an asymmetric polyimide membrane.

Process for separating alkylaromatics from aromatic solvents and the separation of the alkylaromatic isomers using membranes

The heavy bottoms material (13) boiling above about 580°C, obtained from the fractionation (7) of the isomerate (6) produced by the hydroisomerization (4) of heavy waxes (1) such as Bright Stock slack wax and Fischer-Tropsch synthetic wax, is converted into a high quality light oil (11) by severe hydrotreating (14), followed by re-fractionation (7) in either a dedicated fractionator or by recycle to the isomerate fractionator (7).

Heather Alexis Boucher

Papers

Process for the hydroisomerization of fischer-tropsch wax to produce lubricating oil

Process for the hydroisomerization of wax to produce middle distillate products

Alkylation of aromatic molecules using a silica-alumina catalyst derived from zeolite

Process for separating alkylaromatics from aromatic solvents and the separation of the alkylaromatic isomers using membranes

Method of hydrotreating heavy hydroisomerate fractionator bottoms to produce quality light oil upon subsequent re-fractionation