Claims
- 1. A process for producing premium coke from an atmospheric reduced crude feedstock comprising:
- (a) charging a feedstock of from 90 to 100 volume percent of an atmospheric reduced crude and up to 10 volume percent ethylene tar to a coker fractionator, said atmospheric reduced crude having an API gravity of from 20 to 30, a Conradson carbon residue of no more than 6.0 percent, and a boiling distribution as follows:
- ______________________________________Vol. % Temp. .degree. F______________________________________ 5 450-70010 500-75020 570-82030 630-88040 670-94050 720-99060 900+______________________________________
- (b) charging a bottom stream from said coker fractionator to a coker furnace and heating said bottom stream to coking temperature;
- (c) charging said heated bottom stream to a coking drum maintained at premium coking conditions to produce premium coke therein;
- (d) passing overhead vapors from said coking drum to said coker fractionator;
- (e) withdrawing gas oil from said coker fractionator and charging it to a thermal cracking unit where it is thermally cracked in thermal cracking furnace means to produce an effluent thermally cracked material including thermal tar;
- (f) passing effluent from said thermal cracking furnace means to a thermal cracker fractionator;
- (g) withdrawing thermal tar from said thermal cracker fractionator and combining said thermal tar and said atmospheric reduced crude; and
- (h) recovering premium coke from said coke drum, said premium coke being the sole coke product produced in said process.
- 2. The process of claim 1 wherein said gas oil comprises a light gas oil stream and a heavy gas oil stream.
- 3. The process of claim 2 wherein said light and heavy gas oil streams are charged to said thermal cracker fractionator before being charged to said thermal cracking furnace means.
- 4. The process of claim 3 wherein said thermal cracking means comprises a light gas oil cracking furnace and a heavy gas oil cracking furnace.
- 5. The process of claim 1 wherein said atmospheric reduced crude is initially charged to a vacuum distillation column where it is separated into a vacuum reduced crude fraction and a gas oil fraction, said vacuum reduced crude then being charged to said coker fractionator and said gas oil fraction from said vacuum distillation column being charged to said thermal cracking unit.
- 6. The process of claim 5 wherein said gas oil fraction from said vacuum distillation column is charged to said thermal cracker fractionator.
- 7. The process of claim 6 wherein said thermal cracking furnace means comprises a light gas oil cracking furnace and a heavy gas oil cracking furnace.
RELATED APPLICATIONS
This application is a continuation-in-part of co-pending Application Ser. No. 398,372 filed Sept. 18, 1973 for Electrode Grade Petroleum Coke Process, which in turn is a continuation-in-part of Application Ser. No. 261,871 filed June 12, 1972 for Electrode Grade Petroleum Coke Process and both now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3472761 |
Cameron |
Oct 1969 |
|
3547804 |
Noguchi et al. |
Dec 1970 |
|
Non-Patent Literature Citations (2)
Entry |
Scott et al., "Trends in the Production of Metallurigical Grade Petroleum Cokes", AIME Symposium on Light Metals (1971), New York, pp. 277 to 295. |
Kosch et al., "The Oil and Gas Journal", Jan. 2, 1956, pp. 89 & 90. |
Continuation in Parts (2)
|
Number |
Date |
Country |
Parent |
398372 |
Sep 1973 |
|
Parent |
261871 |
Jun 1972 |
|