The present invention relates to an alphaolefin oligomer having a uniform structure and a method of preparing the same, in which the alphaolefin oligomer has a uniform molecular structure with a low branch ratio, thereby exhibiting improved thermal and oxidative stability, a long service life, low volatility, a low pour point and a high viscosity index.

A method for producing a renewable base oil from a feedstock of biological origin includes providing a feedstock, the feedstock including: 2-95 wt % of a mixture of free fatty acids; 5-98 wt % fatty acid glycerols selected from mono-glycerides, di-glycerides and tri-glycerides of fatty acids; 0-50 wt % of one or more compounds selected from the list consisting of: fatty acid esters of the non-glycerol type, fatty amides and fatty alcohols; a major part of the feedstock being a mixture of free fatty acids and fatty acid glycerols; subjecting all or part of the feedstock to ketonisation reaction conditions where two free fatty acids react to yield a ketone stream, and subjecting the ketone stream to both hydrodeoxygenation and to hydroisomerisation reaction conditions, to yield a deoxygenated and isomerised base oil product stream containing the renewable base oil.

Hydrotreatment of biological oil is disclosed for producing renewable base oil and a diesel oil from low value biological oils. Low value biological oils containing free fatty acids and fatty acid esters can be processed into a renewable base oil and a renewable diesel oil in an efficient manner by first separating at least part of the free fatty acids from the feedstock and then processing separately this free acid feed in a ketonisation reaction followed by hydrodeoxygenation and hydroisomerisation reactions to yield a renewable base oil stream. The remaining free fatty acid depleted feed is processed in a separate hydrodeoxygenation and hydroisomerisation step to yield a renewable diesel stream.

A C.sub.31 renewable base oil is disclosed that is suitable as a base oil to provide low viscosity base oils, such as having both low Noack volatility and low CCS-30 C. viscosity and/or to provide low viscosity base oils at the same time having a combination of acceptable HTHS and KV100 to allow the industry's base oil blenders to formulate high quality engine oils, such as SAE grade 0W-20, 0W-16, 0W-12 or 0W-8.

There are provided a solvent composition containing tDCE, which does not exert an adverse effect on the global environment, has high solubility and incombustibility, and can maintain initial incombustibility even in use accompanied by a phase change, a cleaning method using the solvent composition, a coating film-forming composition including the solvent composition, and a method of forming a homogeneous coating film using the coating film-forming composition. A solvent composition includes: tDCE; at least one HFE (A) selected from HFE-347pc-f, HFE-365mf-c, and HFE-467sc-f; and at least one HFC (X) selected from cHFC-447, and HFC-76-13sf, in which a ratio of tDCE with respect to a total amount of tDCE, HFE (A), and HFC (X) is 65 to 80 mass %, a ratio of HFE (A) with respect to the total amount is 5 to 25 mass %, and a ratio of HFC (X) with respect to the total amount is 5 to 25 mass %.

A comb polymer can be used for reducing a Noack evaporation loss of a lubricant composition, especially of an engine oil composition. Application of the comb polymer to the lubricant composition can bring about the desired reduction. The comb polymer can include specified amounts of macromonomer and alkyl acrylates. Resulting lubricant compositions can include the comb polymer.

A lubricant composition is provided that has reduced deposit formation and a low evaporation allowing for improved performance in high temperature applications relative to conventional high temperature lubricants. The high temperature lubricant composition includes a base oil, wherein the base oil includes at least one polyol ester and at least one pyromellitate ester. In some embodiments, the lubricant composition further includes one or more additives selected from the group of an extreme-pressure additive, an anti-wear additive, an anti-rust additive, a corrosion inhibitor, and an antioxidant, or a combination thereof. Further provided are methods for lubricating an apparatus using the lubricant composition, methods for improving the operational lubrication of a conventional high temperature lubricant, and methods of preparing the high temperature lubricant composition of the present invention.

The present disclosure provides processes for producing alkylated fatty acids and derivatives thereof. In at least one embodiment, a process includes introducing a terminal alkyl transferase and a fatty acid into a bioreactor. The process includes introducing an internal methyl transferase and internal methyl reductase into the bioreactor or a second bioreactor. The process includes obtaining an alkylated fatty acid having a methyl substituent located at an internal carbon atom of the fatty acid and a methyl substituent or ethyl substituent located at a carbon atom alpha to the terminal carbon atom of the fatty acid.

A lubricant composition is provided that has reduced deposit formation and a low evaporation allowing for improved performance in high temperature applications relative to conventional high temperature lubricants. The high temperature lubricant composition includes a base oil, wherein the base oil includes at least one polyol ester and at least one pyromellitate ester. In some embodiments, the lubricant composition further includes one or more additives selected from the group of an extreme-pressure additive, an anti-wear additive, an anti-rust additive, a corrosion inhibitor, and an antioxidant, or a combination thereof. Further provided are methods for lubricating an apparatus using the lubricant composition, methods for improving the operational lubrication of a conventional high temperature lubricant, and methods of preparing the high temperature lubricant composition of the present invention.

The instant disclosure is generally directed to low viscosity, low volatility lubricating compositions. The lubricating composition of the instant disclosure includes an oil of lubricating viscosity that contains a lubricating base oil and a hydrocarbon oil. The hydrocarbon oil makes up least 20 wt % of the oil of lubricating viscosity and has a kinematic viscosity of less than 3.7 c St at 100? C. and a NOACK volatility (measured by ASTM D5800) of less than 25 wt %. The lubricant composition further includes a polyalkenyl succinimide dispersant, and, optionally, other formulation additives. The lubricating compositions have been shown to increase fuel economy in internal combustion engines.