Mineral oils: processes and products – Oxidation of mineral oils – To form asphalts – tars or pitches
Patent
1994-02-17
1995-11-28
McCarthy, Neil
Mineral oils: processes and products
Oxidation of mineral oils
To form asphalts, tars or pitches
208 6, 208 13, 208 39, 208179, 208183, C10G 1702
Patent
active
054704553
ABSTRACT:
A process for converting the acid sludge produced by waste oil refineries into an intermediate sludge which can be used in the production of either soft, un-oxidized asphalt or hard, oxidized asphalt, and a process for converting the intermediate sludge into soft, un-oxidized asphalt. The process comprises contacting the entire surface area of acid sludge with a pH altering agent such as water or a solid base such as lime, caustic soda, or soda ash, to convert the acid sludge into a layer of liquid and a layer of intermediate sludge. Then the liquid layer is separated from the intermediate sludge layer, thereby producing an intermediate sludge having properties which make it suitable for use in asphalt production. To produce soft, un-oxidized asphalt, the intermediate sludge is heated to a temperature above the boiling point of water and held at that temperature long enough to remove all the aqueous components to create un-oxidized asphalt. Various additives may be added to alter the characteristics or improve the quality of the resulting asphalt.
REFERENCES:
patent: 3971713 (1976-07-01), Ellender, Jr.
patent: 4029569 (1977-06-01), Ivey, Jr.
patent: 4238241 (1980-12-01), Schneider
patent: 4331481 (1982-05-01), Schneider
patent: 4559128 (1985-12-01), Goodrich
patent: 5049256 (1991-09-01), Luce
patent: 5288392 (1994-02-01), Santos
Kirk-Othmer, "Asphalt" Encyclopedia of Chemical Technology, Third Edition, vol. 3, Antibiotics (Phenazines) to Bleaching Agents, pp. 299-302.
Interline Resoures Corporation, "Interline Re-refining Process", Executive Summary, Oct. 1993.
M. L. Whisman, J. W. Goetzinger, and F. O. Cotton, "Petroleum Refinery Engineering", Report of Investigations 7884, Waste Lubricating Oil Research, p. 228.
W. L. Nelson, "Chemical Treatments", Petroleum Refinery Engineering, Fourth Edition, pp. 261/292-297.
English Translation of Patenschrift, DE 42 05 885 Cl, for Bernard Meinken.
English Translation of Offenlegungsschrift, DE 42 05 884 A1, for Bernard Meinken.
N. J. Weinstein, "Disposal of Recovery Process Residues" Waste Oil Recycling and Disposal, Aug. 1974, p. 178.
"Petroleum Products and Lubricants" (1), D-56-D 1660, 1980 Annual Book of ASTM Standards, Part 23, pp. 454-461.
Fish Ronald C.
McCarthy Neil
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