Step-wise supercritical extraction of carbonaceous residua

Patent · Thu Jan 01 00:00:00 EST 1987

OSTI ID:866289

Warzinski, Robert P ^[1]

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1. Venetia, PA

A method of fractionating a mixture containing high boiling carbonaceous material and normally solid mineral matter includes processing with a plurality of different supercritical solvents. The mixture is treated with a first solvent of high critical temperature and solvent capacity to extract a large fraction as solute. The solute is released as liquid from solvent and successively treated with other supercritical solvents of different critical values to extract fractions of differing properties. Fractionation can be supplemented by solute reflux over a temperature gradient, pressure let down in steps and extractions at varying temperature and pressure values.

• Research Organization: USDOE Pittsburgh Energy Technology Center (PETC), PA (United States)
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4675101
• OSTI ID: 866289
• Country of Publication: United States
• Language: English

Related Subjects

step-wise
supercritical
extraction
carbonaceous
residua
method
fractionating
mixture
containing
boiling
material
normally
solid
mineral
matter
processing
plurality
solvents
treated
solvent
critical
temperature
capacity
extract
fraction
solute
released
liquid
successively
values
fractions
differing
properties
fractionation
supplemented
reflux
gradient
pressure
steps
extractions
varying
mineral matter
supercritical extraction
temperature gradient
critical temperature
mixture containing
carbonaceous material
normally solid
solid mineral
pressure value
supercritical solvent
pressure values
critical solvent
critical value
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