Solvent Refining of Medium Viscosity Distillate and Changes in Group Chemical Composition

✍ Scribed by Singh, Himmat ;Kishore, Kaushal

• Publisher: Blackwell Publishing
• Year: 2010
• Tongue: English
• Weight: 434 KB
• Volume: 28
• Category: Article
• ISSN: 0142-0356
• DOI: 10.1002/jctb.5700280905

✦ Synopsis

Abstract

The relative position of the phase boundary curves and changes in group chemical composition have been studied, in a single stage extraction system, with three solvents for medium viscosity, raw dewaxed lube distillate. Results obtained indicate that solvents with hydrogen‐bonding tendency show low critical solution temperatures and %N + P in raffinate tends to be directly proportional to the product VI with the increase in S:F ratio. Refining effectiveness number and lube refining index together makes it possible to evaluate the solvent refining behaviour of any raw lube distillate for the desired VI level.