Abstract: Systems and methods are provided for modifying or selecting processing conditions for bright stock formation based on compositional characterization of the feedstock and/or bright stock products. In some aspects, the compositional information can include Z-class characterization of the components of a feed and/or bright stock product, optionally in combination with carbon number and/or molecular weight for the components. The compositional information can be used to select processing conditions to allow for removal and/or modification of selected components within a bright stock in order to improve throughput and/or provide desirable cold flow properties.

Abstract: A process to prepare a heat transfer oil, comprising: a. dewaxing a substantially paraffinic wax feed by hydroisomerization dewaxing using a shape selective intermediate pore size molecular sieve under hydroisomerization conditions including a defined hydrogen to feed ratio, whereby a lubricating base oil is produced, b. selecting one or more fractions of the lubricating base oil having: i. a low pour point, ii. greater than 10 weight percent and less than 70 weight percent total molecules with cycloparaffinic functionality, wherein the one or more fractions have at least 31.2 wt % 1-unsaturations by FIMS, and iii. a ratio of weight percent molecules with monocycloparaffinic functionality to weight percent molecules with multicycloparaffinic functionality greater than 15; and c. blending the one or more fractions of the lubricating base oil with less than 0.2 wt % antifoam agent to prepare the heat transfer oil of a defined ISO viscosity grade.

Abstract: The invention relates to a process for preparing lube oil basestocks from lube oil boiling range feeds. More particularly, the present invention is directed toward a process wherein a wax containing feed is solvent dewaxed to produce at least a partially dewaxed lube oil boiling range stream, which is hydrodewaxed to produce a first lube basestock. The first lube basestock is added to an independently selected second lube basestock and additives to make a lubricating oil.

Abstract: The present invention relates to a method in which grades of oil are refined according to their object from a feed oil. This method has a solvent extraction process that obtains an extracted oil, and a hydrogenation process that subjects the obtained extracted oil to hydrogenation process in the presence of hydrogen and a catalyst to obtain a hydrorefined oil. The solvent extraction conditions are selected by using the poly-aromatic concentration as an index for calculating the concentration of heptane insoluble components in the residue of the extracted oil obtained by the solvent extraction process that cannot be fractionally distilled.

Abstract: A method for producing a heavy crude oil from a subterranean formation through a wellbore, transporting the heavy crude oil to a market location and converting the heavy crude oil into a product distillate hydrocarbon stream and by-products such as heat, steam, electricity and synthesis gas by separating distillable components of the heavy crude oil by distillation and solvent deasphalting and converting the asphaltic residual portion of the heavy crude oil in a fluidized bed to at least one of heat, steam, electricity or synthesis gas. The method also produces diluent hydrocarbons useful as a separate product, a distillable hydrocarbon stream or a diluent for use in the production and transportation of the heavy crude oil.

Abstract: A process for dewaxing including the steps of mixing a waxy feedstock near its pour point with an ambient or below ambient temperature solvent essentially free of a selected cosolvent, to form a solvent/feedstock mixture, essentially free of a selected cosolvent, and subsequently adding the cosolvent to the solvent/feedstock mixture to cause instantaneous precipitation of wax on addition of cosolvent with the amount of wax precipitation being controlled by the quantity and temperature of cosolvent added. The cosolvent is essentially completely miscible with the solvent, but immiscible with the oil and wax. For example, alcohols (methanol, ethanol, propanol), ketones (ketene, acetone), amines, etc. The process of the present invention provides the advantages of lower solvent ratios (higher solvent recovery), higher filtration temperatures, "environmentally compatible" solvents, rapid filtration rates, and debottlenecking of existing dewaxing plants.

Abstract: A method for producing a heavy crude oil from a subterranean formation through a wellbore and converting the heavy crude oil into a product distillate hydrocarbon stream and at least one of heat, steam, electricity and synthesis gas by separating distillable components of the heavy crude oil by distillation and converting the residual portion of the heavy crude oil in a fluidized bed to at least one of heat, steam, electricity or synthesis gas. The method also produces diluent hydrocarbons useful in the production and transportation of the heavy crude oil.

Abstract: A process for dewaxing including the steps of mixing a waxy feedstock near its pour point with an ambient or below ambient temperature solvent essentially free of a selected cosolvent, to form a solvent/feedstock mixture, essentially free of a selected cosolvent, and subsequently adding the cosolvent to the solvent/feedstock mixture to cause instantaneous precipitation of wax on addition of cosolvent with the amount of wax precipitation being controlled by the quantity and temperature of cosolvent added. The cosolvent is essentially completely miscible with the solvent, but immiscible with the oil and wax. For example, alcohols (methanol, ethanol, propanol), ketones (ketene, acetone), amines, etc. The process of the present invention provides the advantages of lower solvent ratios (higher solvent recovery), higher filtration temperatures, "environmentally compatible" solvents, rapid filtration rates, and debottlenecking of existing dewaxing plants.

Abstract: There are disclosed processes for separating waxes of different melting points from a room temperature amorphous or liquid hydrocarbon mixture in an energy conservative manner by selectively causing precipitation of crystallized waxes. The processes involve the use of a selected co-solvent totally miscible with light and intermediate hydrocarbons from a group consisting of acetone, ketene, propanone, 2-propanone, methanol, ethanol, isopropanol, N-propanol, acetic acid, formic acid, and propionic acid or combinations thereof as a precipitating agent. Hydrocarbon mixtures, especially those with elevated pour points are first diluted by solvents such as toluene and/or methylethyl ketone which must be free of any significant quantity of the aforesaid co-solvents. The diluted hydrocarbon mixture at above 50 degrees F.

Abstract: A lubricating oil stock is extracted with N-methyl-2-pyrrolidone to yield a primary raffinate useful as a high VI lubricating base oil and a primary extract. The primary extract is mixed with antisolvent and chilled to yield a secondary raffinate. This secondary raffinate is sufficiently reduced in aromatics that it is suitable for fluidized catalytic cracking in the absence of hydrogenation.

Abstract: A lubricating oil stock is extracted with N-methyl-2-pyrrolidone to yield a primary raffinate useful as a high VI lubricating base oil and a primary extract. The primary extract is mixed with antisolvent and chilled to yield a secondary raffinate. This secondary raffinate is sufficiently reduced in aromatics that it is solvent extracted to yield medium to high VI lubricating base oil.

Abstract: Lubricants of improved characteristics are produced by carrying out a solvent extraction to remove aromatic components after solvent or catalytic dewaxing. Aromatic extraction solvents such as phenol, furfural or N-methyl pyrrolidone may be used. The process is particularly useful with wax-derived lubricants produced by the hydroisomerization of a petroleum wax which has then been dewaxed.

Abstract: It has been discovered that cellulose acetate membranes, fabricated using nonaqueous solvent systems, can be used for the separation of polar solvents, especially ketone dewaxing solvents from dewaxed oil. The cellulose acetate membranes so prepared are of a reduced acetyl content and exhibit very good resistance to ketone solvents. The specific fabrication procedure avoids exposing the cellulose acetate to even transient mixtures of ketone and alcohol or ketone and water. Although the cellulose acetate polymer is insoluble in pure water, alcohol, or ketone it is soluble in mixtures of ketone-alcohol and ketone-water.The resulting membrane is an effective means for separating ketone dewaxing solvent from dewaxed oil.

Abstract: A process is disclosed for the manufacture of lubricating base oils from nitrogen-containing distillates and/or deasphalted oils by subjecting them to a catalytic hydrotreatment which may be followed by a dewaxing treatment, wherein distillates and/or deasphalted oils having a nitrogen content which numerically expressed exceeds the value f.multidot.P.sub.H2 .multidot.S.sub.v.sup.-1, wherein f is a constant relating to the viscosity of the final base oil, P.sub.H2 represents the hydrogen partial pressure in bar applied in the catalytic hydrotreatment and S.sub.v represents the weighted hourly space velocity in t/m.sup.3 .multidot.h at which the catalytic hydrotreatment is carried out, are subjected to a preceding solvent extraction.

Abstract: Waxy oils are solvent refined in a relatively low temperature, combination extraction-dewaxing process wherein the waxy oil is simultaneously extracted and at least partially dewaxed in a dilution chilling zone, sequentially followed by a second extraction and a second dewaxing to produce wax and useful lube oils, and wherein solvent does not have to be removed from the oil as it passes from step to step of the process. Further, if the second dewaxing is performed in a dilution chilling zone, then scraped-surface chillers are not required prior to filtering the wax from the oil.

Abstract: A very low pour point transformer oil is produced by a process wherein a narrow cut distillate of a paraffinic crude from conventional crude oil atmospheric or vacuum towers is first solvent extracted to remove aromatics and polar components, followed by immiscible solvent dewaxing whereby two liquid and one solid phases form a wax-containing slurry which is filtered to produce a wax cake which contains a high viscosity index oil and a filtrate which contains a very low pour point transformer oil.