Mineral oils: processes and products – Chemical conversion of hydrocarbons – Cracking
Patent
1982-07-26
1985-05-21
Gantz, D. E.
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Cracking
C10G 914
Patent
active
045184860
ABSTRACT:
An improved quality premium (needle) coke is produced from an aromatic concentrate as the feed and a non-coking feed supplement in lieu of recycle. The premium coker feed bypasses a fractionator, is combined with a non-coking feed supplement, heated in a furnace and charged to a coke drum. Vapors from the premium coking process are returned to a fractionator which is concurrently utilized in a regular grade coking operation. The premium coke thus formed is of a higher quality than coke made from conventional fractionator bottoms, and system costs are reduced by utilizing a single fractionator with concurrent production of regular and premium coke. A preferred embodiment shows additional benefits produced by a higher ratio of recycle to fresh feed to the coke drum during the last stage consisting of about 15 to 25 percent of the total fill cycle.
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Caldarola Glenn A.
Evans Larry W.
Gantz D. E.
Harang Bruce E.
The Standard Oil Company
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