Mineral oils: processes and products – Paraffin wax; treatment or recovery – Separation of paraffin from oil
Patent
1991-02-11
1993-03-23
Morris, Theodore
Mineral oils: processes and products
Paraffin wax; treatment or recovery
Separation of paraffin from oil
208 35, 208 36, C10G 7306, C10G 7308
Patent
active
051961164
ABSTRACT:
There are disclosed processes for separating waxes of different melting points from a room temperature amorphous or liquid hydrocarbon mixture in an energy conservative manner by selectively causing precipitation of crystallized waxes. The processes involve the use of a selected co-solvent totally miscible with light and intermediate hydrocarbons from a group consisting of acetone, ketene, propanone, 2-propanone, methanol, ethanol, isopropanol, N-propanol, acetic acid, formic acid, and propionic acid or combinations thereof as a precipitating agent. Hydrocarbon mixtures, especially those with elevated pour points are first diluted by solvents such as toluene and/or methylethyl ketone which must be free of any significant quantity of the aforesaid co-solvents. The diluted hydrocarbon mixture at above 50 degrees F. is mixed with one or more of such selected co-solvents in a ratio preferably between 1:1 and 10:1 by weight to the heavy hydrocarbon content of the mixture; five minutes or more without artificial cooling is allowed to permit crystallization of waxes which are removed in solid form by a physical process such as filtering, settling, or the like. By controlling the amount and nature of the selected co-solvent and by including or excluding water or brine with the co-solvent, valuable waxes of high melting point may be selectively separated, or all waxes may be removed indiscriminately; performing the separation process in several stages of adding co-solvent and/or water permits selecting out more valuable high melting point waxes first before succeeding stages reduce the wax content of the remaining liquid hydrocarbon to minimal values to enhance its value.
REFERENCES:
patent: 1956780 (1934-05-01), Voorhees
patent: 2044724 (1936-06-01), Govers
patent: 2410483 (1946-11-01), Dons et al.
patent: 2880159 (1959-03-01), Livingstone et al.
patent: 3041268 (1962-06-01), Arabian et al.
patent: 3773650 (1973-11-01), Hislop et al.
patent: 3871991 (1975-03-01), Shaw
patent: 3972802 (1976-08-01), Bushnell
patent: 4111790 (1978-09-01), West
patent: 4514280 (1985-04-01), Shaw et al.
patent: 4673484 (1987-06-01), Babcock et al.
Ackerson Michael D.
Arabshahi Seyed-Hamid
Babcock Robert E.
Diversified Petroleum Recovery, Inc.
Hailey P. L.
Keegan Robert R.
Morris Theodore
University of Arkansas
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