TWO STAGES OF COKING TO MAKE A HIGH QUALITY COKE

• US 3,617,480 A
• Filed: 05/29/1969
• Issued: 11/02/1971
• Est. Priority Date: 05/29/1969
• Status: Expired due to Term

• Current Assignee: Harvey E. Keel
• Original Assignee: Harvey E. Keel
• Inventors: Keel, Harvey E.
• Primary Examiner(s): Levine, Herbert
• Application Number:
  US04/829,082
• Time in Patent Office: 887 Days
• Field of Search: 208/50,53,131
• US Class Current: 208/50
• CPC Class Codes: C10B 55/00 Coking mineral oils, bitumen, tar, and the like or mixtures thereof with solid carbonaceous material cracking oils C10G
• CPC Class Codes: C10B 57/045 containing mineral oils, bitumen, tar or the like or mixtures thereof

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.

Claims

2. A method according to claim 1 wherein said petroleum residuum is derived from a topped or reduced asphaltenic or naphthenic crude oil.

3. A method according to claim 1 wherein said petroleum residuum is derived from a vacuum reduced asphaltenic or naphthenic crude oil.