Study of Catalyst and Co- Catalyst Effect on Preparation of Lubricant from Heavy Propylene Tetramer (HPT)

Document Type : Research Paper




In this research we used Heavy Propylene Tetramer (HPT) and A1C13 —BF3 (Lewis acids) as
catalyst and ethanol, n-propanol and n-butanol as co-catalyst. Using Lewis acids as catalyst, the
HPTs form molecules with higher molecular weight. Since the raw materials of the reaction are by
products of other reactions, are not pure and contain various compounds with different M.W and
also different chemical and physical properties. This fact affects catalyst weight ratio which must
be applied for a better result.
The effect of different catalysts and co-catalysts on yielded lubricant and reaction yield is
investigated. The results show that using alcohol with higher M.W as co- catalyst, increases
reaction yield and iodine number, and also a better lubricant can be obtained. Also, A1C13 seems
to be a better catalyst in laboratory scale research comparing to BF3.