An environmentally acceptable lubricating grease, comprising: a) 50 wt % to 90 wt % of a biodegradable base oil comprising a biodegradable ester as base oil; b) 3 wt % to 25 wt % of a thickener selected from b1) 3 wt % to 12 wt % biodegradable calcium soap, b2) 3 wt % to 25 wt % bentonites, b3) and mixtures thereof; c) 4 wt % to 40 wt % additives, comprising c1) 1 wt % to 12 wt % fumed silicon dioxide and/or polytetrafluoroethylene and/or mixtures thereof, c2) 2 wt % to 45 wt % of a polymer selected from polyisobutylene, polyisobutylene/butene copolymer, polymethacrylates, polyesters and mixtures thereof, c3) 0.5 wt % to 20 wt % of a solid lubricant.

The present invention relates to a composition of branched fatty acids or esters thereof, the process for preparing such a composition and its use in various industrial fields, such as in lubricant, in cosmetics and in home care. More particularly, the present invention relates to a composition comprising at least 30% by weight of polybranched C.sub.10-C.sub.24 fatty acids or esters thereof, and a cyclic compound content ranging from 1% to 8% by weight, the weight percentage being given on the total weight of the composition.

[Problem] An ester compound having low viscosity, excellent fluidity even at low temperatures, and a high viscosity index; and a lubricating oil base oil containing said compound are provided. [Solution] The present invention provides an ester compound indicated by formula (I). Formula (I) (in formula (I), R.sub.1 is a hydrocarbon group having 1 to 35 carbon atoms and at least one hydrogen in the hydrocarbon group may be independently substituted with a group indicated by formula (II)). Formula (II) (in formula (II), R.sub.2 is a linear alkyl having 1 to 30 carbon atoms or a branched alkyl having 3 to 30 carbon atoms.)

The present disclosure relates to lubricating oil compositions, and in particular, lubricating oil compositions for slideway applications, additive compositions for the slideway lubricants, and methods of lubricating a machine part, such as a slideway with the lubricating oil compositions. In one aspect, the lubricating oil compositions have a composition that provides both good friction performance and good separability from metal working fluids at the same time.

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.

The present application provides binary azeotrope or azeotrope-like compositions comprising perfluoroheptene and an additional component, wherein the additional component is present in the composition in an amount effective to form an azeotrope composition or azeotrope-like composition with the perfluoroheptene. Methods of using the compositions provided herein in cleaning and carrier fluid applications are also provided.

The present invention provides a refrigerating machine oil comprising a hydrocarbon-based base oil having a viscosity index of 120 or less, and the refrigerating machine oil being used with a 1-chloro-2,3,3,3-tetrafluoropropene refrigerant.

A mixture of alkylesters of fatty acids is provided, wherein the fatty acids have the following composition: at least 56% of saturated C12 chains, at least 23% of saturated C14 chains, at most 8% of saturated C16 chains, at most 5% of saturated C6-10 chains, at most 5% of monounsaturated C18 chains, at most 2% of saturated C18 chains, at most 0.8% of diunsaturated C18 chains, and at most 0.2% of saturated C20 chains. The percentages are an average percentage expressed in number of moles per total number of moles of alkylesters, and the use of these mixtures is as a viscosity agent.

Provided is a grease composition including a thickener and a base oil, in which the thickener is a urea compound represented by formula (1)
R1-NHCONHR2-NHCONHR3(1)
wherein R2 represents a divalent C.sub.6-15 aromatic hydrocarbon group, and R1 and R3 may be the same or different and each represent an C.sub.8-22 alkyl group, a cyclohexyl group, or an C.sub.6-12 aryl group, and as the base oil, one or more types of a compound represented by formula (2) are contained at 40% by mass or more relative to a total mass of the base oil, wherein R4 and R5 may be the same or different and each represent a linear or branched C.sub.10-26 alkyl group, where m and n are real numbers being 0 or more which satisfy m+n=2.

One or more embodiments presently described are directed to lubricants and methods for making such lubricants. According to one embodiment, a lubricant suitable for use in a water-based drilling fluid may comprise one or more alkyl esters and a fatty acid blend comprising at least palmitic acid and stearic acid. The sum of the weight percent of the palmitic acid and stearic acid may be at least 50 wt. % of the fatty acid blend. The weight ratio of the one or more alkyl esters to the fatty acid blend may be from 1:1 to 3:1. The molar ratio of palmitic acid to stearic acid may be from 20:80 to 40:60.