Production of Heavy Lubricating Oil Base Stocks and Analyses by Using a New Method — HPLC

摘要

The main objective of the present investigative work is the experimental production of heavy lubricating oil base stocks and the study of the effect of chemical composition on physico-chemical characteristics of the prepared lube oil samples. In the first process, solvent dewaxing, the mixture of methyl ethyl ketone and methyl isobutyl ketone (MEK/MIBK) is used as a recent solvent in the dewaxing process to obtain a significant yield of low pour point products and to compare this mixture with MEK/toluene which is used in the industry process. Solvent dewaxing process is carried out at - 10°C using the mixture of MEK and MIBK (40/60 by wt.) with solvent oil ratio of 3:1 for the selected raffinates, heavy refined oils, from furfural and NMP extraction processes. The dewaxed oil samples were analysed to evaluate their physico-chemical characteristics by the standard methods outlined in ASTM, IP and UOP books such as the standard methods for wax content, pour point, sulfur content and structural group analysis by n-d-M method. The results show that the use of MEK/MIBK mixture instead of MEK/toluene at -10°C achieves an increase in filtration temperature with about 5°C with subsequent a reduction in the cooling rate of process