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Carbonium ion can be generated easier when low-carbon alcohols are added to hydrocracking tail oil, which initiate the cracking reaction of macromolecular n-paraffin. So the yield of lube oil base oil increases, while that of paraffin decreases, but the total yield of the two products increases. When the low-carbon alcohol is added to the raw oil for non-hydrodewaxing reaction of hydrocracking tail oil, the pour point of lubricating oil base oil declines, the flash point and the viscosity increases slightly, and the distillation range of paraffin declines slightly, but the properties of products changes little, so they can meet the actual production requirements of the factory. By examining the influence of low-carbon alcohol on the yield and properties of lubricating oil base oil and paraffin, tert-butyl alcohol is an ideal chain initiator, and the most suitable addition is 1.0 w%. [ABSTRACT FROM AUTHOR]

Re-refining of used lubricating oil has appeared as a valuable technique to re-refining of used engine and industrial oils. This paper focused on the vacuum distillation thin wiped film evaporation technique of used lubricating oil recycling. The whole process consists of dehydration, gas oil evaporation, thin wiped film evaporation and clay treatment. The produced base oils are in group I through determination of sulfur contents, percentage of saturate compounds and viscosity indexes. The obtained results are practicable with most of the American Society for Testing and Materials (ASTM) properties and reduced most of worn metals in the refined base oils. [ABSTRACT FROM AUTHOR]

Homopolymer of acrylate of a mixture of myristyl (C14), dodecyl (C12), and decyl (C10) alcohols in 2:1:1 molar ratio was synthesized by two different ways, microwave-assisted method and thermal method using benzoyl peroxide as initiator. The polymers were characterized by spectroscopic (NMR, IR) and viscometric analysis. Performances of each of them as a pour point depressant and viscosity modifier for lubricating oil (lube oil) were also evaluated by standard ASTM methods. Oil thickening property of the polymers has also been investigated and reported here. Thermal stability of the polymers was determined by thermogravimetric analysis. [ABSTRACT FROM AUTHOR]