摘要:
The invention provides a method for improving the air release of a lubricating oil in a hydraulic system, said method comprising supplying the lubricating oil to the hydraulic system. The air release is measured according to ASTM D3427.
摘要:
The invention provides a method for improving the air release of a lubricating oil as measured by ASTM D3427. The method comprises a step of mixing an additive into the lubricating oil.
摘要:
The present invention relates to a process for preparing a base oil fraction having a reduced cloud point from a hydrocarbon feed which is derived from a Fischer-Tropsch process, the process comprises the steps of: (a) providing a hydrocarbon feed which is derived from a Fischer-Tropsch process; (b) subjecting the hydrocarbon feed of step (a) to a catalytic dewaxing treatment to obtain an at least partially isomerised product; (c) separating at least part of the at least partially isomerised product as obtained in step (b) into one or more light hydrocarbon fractions and one or more heavy base oil fractions; (d) separating at least one of the heavy base oil fractions as obtained in step (c) by means of a first membrane into a first permeate which comprises a base oil having a reduced cloud point and a first retentate which comprises a base oil containing haze compounds, wherein the membrane separation is carried out at a temperature in the range of from the pour point of the base oil and up to 120 °C and a pressure in the range of from 5-60 bar; and (e) separating at least part of the first permeate as obtained in step (d) by means of a second membrane into a second permeate which comprises a base oil having a further reduced cloud point and a second retentate which comprises a base oil containing haze compounds, wherein the membrane separation is carried out at a temperature in the range of from the pour point of the base oil and up to 120 °C and a pressure in the range of from 5-60 bar; and (f) recovering the second permeate as obtained in step (e).
摘要:
A lubricating oil composition for automotive transmissions is disclosed. It offers an automotive transmission (especially a fuel-saving type) which satisfies all requirements as regards the properties of resistance to churning, maintenance of the oil film and low-temperature viscosity. It comprises a GTL low viscosity base oil and a Group 1 high viscosity base oil.
摘要:
Use of a comb polymer for reducing the loss in viscosity of a lubricating composition for the crankcase of an internal combustion engine, wherein the internal combustion engine is fuelled by a fuel composition comprising a fatty acid alkyl ester.
摘要:
A cable fill composition for an optical fiber cable, said cable fill composition comprising (i) a Fischer-Tropsch derived base oil; and (ii) a thickening system, wherein the thickening system comprises at least one block copolymer. The cable fill composition of the present invention provides improvements in rheological characteristics, low temperature properties, and colour stability properties, as well as minimizing the levels of additives such as antioxidants and pour point depressants which need to be used.
摘要:
A lubricating composition for use in the crankcase of an engine comprising a base oil and one or more additives, wherein the base oil comprises a Fischer-Tropsch derived base oil and wherein the lubricating composition comprises one or more comb polymers. The lubricating composition of the present invention has been found to improve sustained fuel economy properties whilst obtaining improved piston cleanliness properties and improved dispersancy properties.