TWO STAGES OF COKING TO MAKE A HIGH QUALITY COKE
First Claim
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2. A method according to claim 1 wherein said petroleum residuum is derived from a topped or reduced asphaltenic or naphthenic crude oil.
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Abstract
The coking process disclosed herein provides a method for producing high quality petroleum coke which is particularly suitable for use in manufacturing electrothermic graphite electrodes. A high-boiling gas oil fraction is obtained from the overhead products produced during the coking of a petroleum oil residuum. This high-boiling gas oil fraction is segregated during the manufacture of regular or average quality petroleum coke and is subsequently coked in a separate coking operation under delayed coking conditions of time, temperature and pressure to produce a superior quality petroleum coke.
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3 Claims
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2. A method according to claim 1 wherein said petroleum residuum is derived from a topped or reduced asphaltenic or naphthenic crude oil.
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3. A method according to claim 1 wherein said petroleum residuum is derived from a vacuum reduced asphaltenic or naphthenic crude oil.
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