Method for producing isotropic coke
AssigneeConoco Inc.
InventorLloyd G. Becraft
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Abstract
A nonair-blown low sulfur petroleum residual oil is combined with super finely divided particles of calcined premium coke, and the combination is subjected to delayed coking to produce isotropic coke containing reduced sulfur and having a low CTE ratio.
Claims16
In a process in which a hydrocarbon feedstock consisting essentially of a nonair-blown sulfur-containing heavy aromatic mineral oil which does not produce acceptable isotropic coke when subjected to delayed coking is subjected to delayed coking to produce isotropic coke, the improvement which comprises combining the heavy aromatic mineral oil with super finely divided particles of calcined premium coke having an average diameter between about 1 and about 40 microns prior to carrying out the delayed coking.
A for producing isotropic coke having a low CTE ratio from a hydrocarbon feedstock consisting essentially of a nonair-blown sulfur-containing heavy aromatic mineral oil, which when subjected to delayed coking produces a coke having a coefficient of thermal expansion ratio of 2.0 or higher, which comprises:
- (a) Combining the heavy aromatic mineral oil with super finely divided particles of calcined premium coke, having an average diameter of between about 1 and about 40 microns, and
- (b) Subjecting the combined material to delayed coking to produce isotropic coke having a CTE ratio of less than about 1.5.
A process for producing isotropic coke having reduced sulfur content and a low CTE ratio which comprises:
- (a) combining a hydrocarbon feedstock consisting essentially of a nonair-blown sulfur-containing heavy aromatic mineral oil which when subjected to delayed coking produces a coke having a coefficient of thermal expansion ratio of 2.0 or higher with super finely divided particles of calcined premium coke having an average diameter between about 1 and about 40 microns, and
- (b) subjecting the combined material to delayed coking to produce an isotropic coke having a CTE ratio of less than about 1.5 and reduced sulfur content.
Dependencies are inferred from the claim text.