Synthetic lubricating oils from thermal cracking of polymers...

Details Synthetic lubricating oils from thermal cracking of polymers... Synthetic lubricating oils from thermal cracking of polymers...

C - Chemistry, Metallurgy

10

G

253/128, 196/53

C10G 47/00 (2006.01) C08F 10/00 (2006.01)

Patent

CA 1036585

ABSTRACT OF THE DISCLOSURE: Hydrogenated synthetic lubricating oils are obtained by subjecting a polymer having a substantially high viscosity and a boiling point higher than 175°C, obtained by polymerizing normal alpha-olefines having the general formula R - CH = CH2 wherein R is an alkyl radical containing from 2 to 16 carbon atoms, in the presence of a TiCl4/polyiminoalane catalyst and under an inert atmosphere possibly containing hydrogen up to a partial pressure of 1 kg/cm2, to a thermal cracking carried out at atmospheric pressure and a temperature comprised between 300 and 420°C, with contact times ranging from 5 minutes up to 4 hours, distilling the product obtained under vacuum up to a head temperature, referred to atmospheric pressure, of 400°C and finally subjecting the residue having a boiling point higher than 400°C to a catalytic hydrogenation. The oils thereby ob- tained present very high viscosity indices, very low pour points, low viscosities at 0°F, high thermal stability, high resistance to depolymerization, high flash points and very low carbon resi- due.

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