Chemistry and Technology of Lubricants - download pdf or read online

By R. J. Prince (auth.), R. M. Mortier, S. T. Orszulik (eds.)

ISBN-10: 1461364396

ISBN-13: 9781461364399

ISBN-10: 1461532728

ISBN-13: 9781461532729

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The alcohol is then returned to the reactor. Polyol esters are made by reacting a polyhydric alcohol, such as neopentyl glycol (NPG), trimethylol propane (TMP) or pentaerythritol (PE), with a monobasic acid to give the desired ester.

Wax). The urea-wax adduct is removed by filtration to leave a very low pour point oil. Urea and solvent are recovered and recycled. 8 Finishing Despite the intensive series of process steps carried out so far, trace impurities may still be present in the base oil and a finishing step is needed to correct problems such as: • • poor colour poor oxidation or thermal stability 24 CHEMISTRY AND TECHNOLOGY OF LUBRICANTS • • poor demulsification properties poor electrical insulating properties These undesirable components tend to be nitrogen-, oxygen- or, to a lesser extent, sulphur-containing molecules.

In the lubricant industry it is used in the manufacture of dispersant additives and viscosity index (VI) improvers, where it has been particularly exploited for its clean burning characteristics. Lower molecular weight fluids, though rarely used as true base fluids, have found application where their ability to depolymerise and burn completely without leaving any deposits is advantageous. Being hydrocarbons, polybutenes are also compatible with mineral oils, and confer good metal-wetting properties and improved film strength.

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Chemistry and Technology of Lubricants by R. J. Prince (auth.), R. M. Mortier, S. T. Orszulik (eds.)

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