Mineral oils: processes and products – Fractionation – Deasphalting
Patent
1982-07-27
1983-12-20
Gantz, Delbert E.
Mineral oils: processes and products
Fractionation
Deasphalting
208 86, 208321, C10G 2100, C10G 2128
Patent
active
044216394
ABSTRACT:
The invention is an energy-efficient improvement in a continuous deasphalting process in which a mixture of viscous hydrocarbon oils with resins and/or asphaltenes is contacted with a quantity of pure or mixed hydrocarbon solvents including, but not limited to, propane, butane, pentane, hexane, heptane, isomers thereof, and unsaturated hydrocarbons of similar molecular weights, in order to separate a primary extract phase comprising high viscosity oil, resins and/or asphaltenes, and solvent. The primary raffinate phase is further contacted with an additional quantity of solvent comprising similar components to those in the primary solvent (but not necessarily identical thereto) to separate a secondary extract phase comprising high viscosity oil and solvent, and a secondary raffinate phase comprising resins and/or asphaltenes and solvent. The contacting step may be repeated as often as desired to make additional extract phases which are recovered separately. The solvents from the extract and raffinate phases are separated from the associated viscous oils, resins and/or asphaltenes, and reused in the contacting process. Several embodiments of the invention are disclosed. In each embodiment, the primary and secondary recovery systems are integrated so that heat recovered from the primary solvent is used to operate the secondary recovery system.
REFERENCES:
patent: 2616912 (1952-11-01), Dickinson
patent: 2727847 (1955-12-01), Hunn
patent: 2850431 (1958-09-01), Smith
patent: 2943050 (1960-06-01), Beavon
patent: 3830732 (1974-08-01), Gatsis
patent: 3975396 (1976-08-01), Bushnell et al.
patent: 4017383 (1977-04-01), Beavon
Gleitsmann, deceased Joseph W.
Lambert John S.
Caldarola Glenn A.
Foster Wheeler Energy Corporation
Gantz Delbert E.
Kice Warren B.
Naigur Marvin A.
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