1-Decene dimer with a terminal double bond (C20=) was oligomerized or co-oligomerized with 1-decene using an acidic ionic liquid 1-ethyl-3-methyl imidazolium heptachloroaluminate [emim+][Al2Cl7-] as catalyst. The viscosity of the polyalphaolefin (PAO) product fluid was 9.25 cSt at 100 oC with viscosity Index of 135. In the oligomerization process one converts low molecular weight, volatile 1-decene dimer into a fluid with lower volatility, higher viscosity and higher viscosity index. Similarly, 1-decene dimer with a terminal double bond (C20=) was reacted with diphenylamine (DPA) using the same acidic ionic liquid catalyst to obtain an antioxidant bound fluid. In the DPA alkylation process we obtained higher viscosity fluids because of 1-decene dimer oligomerization followed by alkylation or multiple alkylations. Thus, potentially one can modify a process to design a functional fluid with desired viscosity and antioxidant-solubility characteristics.

Oligomerization and functionalization using ionic liquid catalyst to obtain synthetic fluids

248th National Meeting (2014)

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