Mixed solvent dewaxing of Kuwait middle distillates

Conference · Mon Sep 01 04:00:00 EDT 1986 · Am. Chem. Soc., Div. Pet. Chem., Gen. Pap., Prepr.; (United States)

OSTI ID:6821832

Ijam, M J; Al-Ameeri, R S; Fahim, M A; Aref, S F

Raw distillate fractions of petroleum contain a considerable concentration of paraffin waxes, which leads to a high pour point. However, for some special purposes, a low pour point of these oils is required as well as a fixed viscosity. For this reason, the paraffin waxes have to be removed from the oil distillates. The dewaxing process is one of the most laborious and costly steps in the production of lubricating oils; hence any improvement in this process is desirable. Dewaxing cannot be accomplished by distillation, since the waxy materials boil throughout the entire temperature range. In order to overcome this difficulty, various dewaxing processes have been designed, e.g., filter pressing, catalytic breakdown of the waxes, urea clathration, zeolitic adsorption, and solvent dewaxing. Most processes applied in the industry use a mixture of two solvents, e.g. benzene-acetone, benzene-methyl ethyl ketone, benzene-SO/sub 2/... etc. The principle of all these processes is based upon the different selectivity of the two solvents in dissolving the various components. The pour point obtained is dependent on the composition of the two solvents, on the ratio of the mixed solvent to the oil and on the cooling temperature used. Due to this, operation conditions can be varied over a wide range. The first objective of this work is to find optimum conditions for dewaxing of Kuwaiti heavy gas oil (HGO). These include different solvent mixtures, dilution ratio, cooling rate and filtration section level. The second objective is aiming to establish some empirical correlations for dewaxing which might be useful for designing and operating of dewaxing process for heavy gas oil at sub-zero temperatures.

• Research Organization: Chemistry Dept. and Chemical Engineering Dept., Univ. of Kuwait, P.O. Box 5969
• OSTI ID: 6821832
• Report Number(s): CONF-860911-
• Conference Information: Journal Name: Am. Chem. Soc., Div. Pet. Chem., Gen. Pap., Prepr.; (United States) Journal Volume: 31:3
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ACETONE
ADSORPTION
ALKANES
ALKYL RADICALS
AROMATICS
ASIA
BENZENE
BOILING
CHALCOGENIDES
DEWAXING
DISPERSIONS
DISTILLATES
ENERGY SOURCES
ETHYL RADICALS
EXTRACTION
FILTRATION
FOSSIL FUELS
FUELS
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
KETONES
KUWAIT
LUBRICANTS
LUBRICATING OILS
MATERIALS
METHYL RADICALS
MIDDLE EAST
MINERALS
MIXTURES
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PARAFFIN
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PHASE TRANSFORMATIONS
POUR POINT
PRESSURIZING
PROCESS SOLUTIONS
RADICALS
REMOVAL
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
SORPTION
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
VISCOSITY
WAXES
ZEOLITES