Solvent fractionation of wax-containing mixtures

Patent · Tue Jul 22 00:00:00 EDT 1952

OSTI ID:5157974

Clarke, E W

A method is described of separating a wax-containing mixture into fractions of higher and lower melting point, which comprises counter-currently contacting the wax-containing mixture in an extraction zone with an extraction solvent and solvent additives at a temperature such that two immiscible liquid phases are formed, one comprising the higher melting wax fraction containing solvent and additives, and the other comprising solvent and additives and the lower melting wax fraction. The phases are separated, and the solvent and additives are removed from each. The solvent is introduced into the extraction zone near the point of withdrawal of the higher melting wax fraction. The first additive is introduced adjacent the point of introduction of the wax-containing mixture, and the second additive is introduced between the point of introduction of the first additive and the point of withdrawal of the lower melting wax fraction. The solvent comprises 1.6 to 2.4 volumes of nitrobenzene containing a small amount of furfural per volume of wax-containing mixture. The first additive comprises 0.15 to 0.25 volume of furfural per volume of wax-containing mixture, and the second additive comprises 0.15 to 0.25 volume of furfural per volume of wax-containing mixture.

• Assignee: Atlantic Refining Co.
• Patent Number(s): US 2604433
• OSTI ID: 5157974
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
04 OIL SHALES AND TAR SANDS
040403 -- Oil Shales & Tar Sands-- Refining
ALDEHYDES
BOILING POINTS
EXTRACTION
FRACTIONATION
FURANS
FURFURAL
HETEROCYCLIC COMPOUNDS
NITRO COMPOUNDS
NITROBENZENE
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVENT PROPERTIES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
WAXES