Multiple stage desalting and dedusting process

Details Multiple stage desalting and dedusting process Multiple stage desalting and dedusting process

1981-07-21

1983-11-15

Gantz, Delbert E.

Mineral oils: processes and products

Products and compositions

Lubricating oils

208 8R, 208251R, 208177, C10G 100, C10G 3108

Patent

active

044154348

ABSTRACT:
A process is provided to dedust oil derived from solid hydrocarbon-containing material, such as oil shale, coal or tar sand in multi-stage desalters. In the process, water is dispersed into the oil before entering each desalter to form an emulsion. The desalter separates the emulsion into a stream of oil having a substantially lower concentration of dust and a dusty stream of water containing most of the dust. In one embodiment, the sludge-like dusty stream from the first desalter is combusted in a lift pipe and used as heat carrier material in the retort. In other embodiments, the dusty stream from the first desalter is centrifuged or filtered and thereafter heated in a dryer to remove residual oil and water from the stream before the stream is combusted in the lift pipe and used as heat carrier material in the retort and dryer. Effluent water from the second and third desalters as well as from the centrifuge or filter are recycled upstream and dispersed in the oil.

REFERENCES:
patent: 2446040 (1948-07-01), Blair, Jr.
patent: 2789083 (1957-04-01), Hardy
patent: 3888760 (1975-06-01), Ebert
patent: 4293401 (1981-10-01), Sieg et al.
Congram, G. E., Refiners Zeroin on Better Desalting Oil and Gas Journal, Dec. 30, 1974, pp. 153-154.
Waterman, L. C., Crude Desalting: Why and How Hydrocarbon Processing and Petroleum Refiner, Feb. 1965, p. 133, vol. 44, No. 2.

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