Physical Chemistry and Control Technology for the Production of Polyalphaolefin Oils

Купцов, А. Х.; Arutyunov, I. A.; Khakhin, L. A.; Potapova, S. N.; Korolev, Evgeniy; Kulik, Аlexander; Rudyak, K. B.

doi:10.1007/s10553-020-01127-5

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“…[1] In fact, more than 40 % of synthetic oil production belongs to PAOs. [2,3] Since the 1970s, PAOs have been developed because of their unique performance advantages. [4,5,6,7] The valuable characteristics of PAO during high temperature use, such as: low volatility (low oil consumption and lower emissions), low pour point (À 50 to À 60 °C), and high thermal-oxidation stability (yield performance) guarantee the excellent performance of the oil at high temperatures and increase the useful life of the oil.…”

Section: Introductionmentioning

confidence: 99%

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Chain Walking in the AlCl₃ Catalyzed Cationic Polymerization of α‐Olefins

et al. 2023

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Continuing efforts aimed at performing the 1‐decene polymerization to low viscosity polyalphaolefins (PAO)s using a less hazardous AlCl3 catalyst than boron‐based analogs, the basic mechanisms of this system were revealed in this research. In this aspect, neat AlCl3 and AlCl3/toluene were carried out to perform 1‐decene polymerizations. Microstructure analyses of the as‐synthesized oils revealed low molecular weight (708 vs. 1529 g/mol), kinematic viscosity (KV100=6.4 vs. 22.2 cSt), and long chain branching (82.1 vs. 84.7) of PAO from the system containing toluene solvent. Furthermore, NMR analysis confirmed various types of short chain branch (SCB) with the inclusion of toluene ring in the structure of final PAO chains. Then, to shed light on the basic mechanisms of cationic polymerization of 1‐decene including: i) chain initiation, ii) chain transfer to the monomer, iii) isomerization of the carbocation via a chain walking mechanism (causes different SCB length), and iv) binding of toluene ring to the propagating PAO chain (to yield aromatic containing oligomers), molecular modeling at the DFT level was employed. The energies obtained confirmed the ease of carbocation isomerization and chain transfer mechanisms in toluene medium, which well confirms the highly branched structure experimentally obtained for related PAO.

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Section: Introductionmentioning

confidence: 99%

“…Due to the tightening of environmental laws and the compulsion to change the design of diesel and diesel engines to reach maximum environmental protection, high performance polyalphaolefin (PAO) oils have been widely employed [1] . In fact, more than 40 % of synthetic oil production belongs to PAOs [2,3] …”

Section: Introductionmentioning

confidence: 99%