Mineral oils: processes and products – Chemical conversion of hydrocarbons – Plural serial stages of chemical conversion
Patent
1988-11-21
1991-01-08
Garvin, Patrick P.
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Plural serial stages of chemical conversion
208 80, 208131, C10B 5500
Patent
active
049832727
ABSTRACT:
A process for producing coke from a combined feed. The combined feed is initially provided as a first portion which comprises easily cokable components and a second portion which is essentially free of easily cokable components. The first portion is heated to a temperature lower than that normally employed by a coking heater in a delayed coking process. The second portion is heated to a temperature at which a combination of the first and second portion provides combined feed at coking temperatures. The combined feed is then subjected to coking conditions.
The first portion, in one embodiment, may be comprised of a fresh feed and the second portion may be comprised of a coker recycle. In another alternative, a fresh feed and a coker recycle are combined and fractionated to produce the first portion and the second portion. The first portion may include components which boil above a temperature of about 900.degree. F., and the second portion may be essentially free of easily cokable components.
REFERENCES:
patent: 2626892 (1953-01-01), McCulley et al.
patent: 3617515 (1971-11-01), Bloomer
patent: 3956101 (1976-05-01), Hara et al.
patent: 4501654 (1985-02-01), Allan
patent: 4518486 (1985-05-01), Jansma
Garvin Patrick P.
Irzinski E. D.
Lillie Raymond J.
Lummus Crest Inc.
Olstein Elliot M.
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