Manufacture of low-sulfur needle coke

Details Manufacture of low-sulfur needle coke Manufacture of low-sulfur needle coke

1977-02-17

1978-02-21

Meros, Edward J.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

With preliminary treatment of feed

208 50, 208 92, 208131, C10B 5702, C10G 914

Patent

active

040750841

ABSTRACT:
High grade, low-sulfur needle coke is produced from heavy high-sulfur aromatic mineral oil feedstocks by a sequence of (1) fractionating the feedstock into a minor heavy fraction, and a major lighter fraction, (2) subjecting the lighter fraction to mild hydrofining, (3) blending the heavy fraction separated in step (1) with the heavy fraction of hydrofined oil from step (2), (4) subjecting the resulting blend to delayed thermal coking, and preferably (5) recycling to the coking step heavy coker gas oil recovered from the coker effluent. If desired, the aromaticity of the heavy hydrofined oil from step (2) can be increased by subjecting the same to thermal cracking prior to step (3).

REFERENCES:
patent: 2775549 (1956-12-01), Shea
patent: 3480540 (1969-11-01), Eng et al.
patent: 3817853 (1974-06-01), Folkins
patent: 3891538 (1975-06-01), Walkey
patent: 3902991 (1975-09-01), Christensen et al.
patent: 4005006 (1977-01-01), Montagna

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