Mineral oils: processes and products – Paraffin wax; treatment or recovery – Separation of paraffin from oil
Patent
1998-12-28
2000-02-15
Yildirim, Bekir L.
Mineral oils: processes and products
Paraffin wax; treatment or recovery
Separation of paraffin from oil
208 35, 208 36, C10G 7306
Patent
active
060248629
ABSTRACT:
A process for dewaxing including the steps of mixing a waxy feedstock near its pour point with an ambient or below ambient temperature solvent essentially free of a selected cosolvent, to form a solvent/feedstock mixture, essentially free of a selected cosolvent, and subsequently adding the cosolvent to the solvent/feedstock mixture to cause instantaneous precipitation of wax on addition of cosolvent with the amount of wax precipitation being controlled by the quantity and temperature of cosolvent added. The cosolvent is essentially completely miscible with the solvent, but immiscible with the oil and wax. For example, alcohols (methanol, ethanol, propanol), ketones (ketene, acetone), amines, etc. The process of the present invention provides the advantages of lower solvent ratios (higher solvent recovery), higher filtration temperatures, "environmentally compatible" solvents, rapid filtration rates, and debottlenecking of existing dewaxing plants.
REFERENCES:
patent: 1956780 (1934-05-01), Voorhees
patent: 2044724 (1936-06-01), Govers
patent: 2049059 (1936-07-01), Goss et al.
patent: 2067050 (1937-01-01), Govers
patent: 2164779 (1939-07-01), Manley
patent: 2191136 (1940-02-01), Tijmstra et al.
patent: 2223939 (1940-12-01), Jones
patent: 2229658 (1941-01-01), Jenkins
patent: 2410483 (1946-11-01), Dons et al.
patent: 2463845 (1949-03-01), Backlund et al.
patent: 2486014 (1949-10-01), Evans
patent: 2578510 (1951-12-01), Clarke
patent: 2604435 (1952-07-01), Clarke
patent: 2608517 (1952-08-01), Tiedje
patent: 2625502 (1953-01-01), Backlund et al.
patent: 2698279 (1954-12-01), Mandria
patent: 2723220 (1955-11-01), Axe
patent: 2880159 (1959-03-01), Livingstone et al.
patent: 2904496 (1959-09-01), Bloch et al.
patent: 2914456 (1959-11-01), Moore et al.
patent: 2915449 (1959-12-01), Doorn et al.
patent: 3011972 (1961-05-01), Watson et al.
patent: 3041268 (1962-06-01), Arabian et al.
patent: 3105809 (1963-10-01), Butler et al.
patent: 3239445 (1966-03-01), Leonard et al.
patent: 3320153 (1967-05-01), Pino
patent: 3627673 (1971-12-01), Sproule et al.
patent: 3764517 (1973-10-01), Bodemuller, Jr.
patent: 3773650 (1973-11-01), Hislop et al.
patent: 3775288 (1973-11-01), Eagen et al.
patent: 3871991 (1975-03-01), Shaw
patent: 3966586 (1976-06-01), Owen et al.
patent: 3972802 (1976-08-01), Bushnell
patent: 4111790 (1978-09-01), West
patent: 4115241 (1978-09-01), Harrison et al.
patent: 4145275 (1979-03-01), Hall et al.
patent: 4146461 (1979-03-01), Broadhurst et al.
patent: 4199433 (1980-04-01), Button et al.
patent: 4441987 (1984-04-01), Broadhurst
patent: 4444648 (1984-04-01), West
patent: 4447311 (1984-05-01), Fowles et al.
patent: 4502787 (1985-03-01), Broadhurst
patent: 4514280 (1985-04-01), Shaw et al.
patent: 4591426 (1986-05-01), Krasuk et al.
patent: 4673484 (1987-06-01), Babcock et al.
patent: 4695363 (1987-09-01), West
patent: 4728413 (1988-03-01), Broadhurst
patent: 4898659 (1990-02-01), Broadhurst
patent: 5006222 (1991-04-01), Sequeira, Jr.
patent: 5196116 (1993-03-01), Ackerson et al.
patent: 5474668 (1995-12-01), Ackerson et al.
patent: 5620588 (1997-04-01), Ackerson et al.
patent: 5853564 (1998-12-01), Ackerson et al.
Ackerson Michael D.
Arabshahi Seyed-Hamid
Babcock Robert E.
Advanced Refining Technologies, Inc.
University of Arkansas
Yildirim Bekir L.
LandOfFree
Petroleum-wax separation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Petroleum-wax separation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Petroleum-wax separation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1902909