Process for the production of a petroleum pitch or coke of a high purity
Patent
·
OSTI ID:5778321
A petroleum pitch or coke of a high purity is produced from a petroleum heavy residue such as distillation and cracked residua, asphalt and pitch. The residue is treated prior to a conventional pitching or coking treatment. The residue is treated with hydrogen in the absence of a catalyst under a hydrogen pressure of 20-200 kg/cm2 under a gradual heating up to a final temperature of 350-400/sup 0/C so as to heat the residue from 150/sup 0/C to 300/sup 0/C over 30 to 120 minutes and then from 300/sup 0/C to the final temperature over 10 to 60 minutes. The catalytic hydrogen treatment is called ''hydrogenation refining step'', which gives a refined pitching/coking feedstock from which a petroleum pitch or coke of extra high purity is derived.
- Assignee:
- Hi-Max Ltd (Japan)
- Patent Number(s):
- US 4312742
- OSTI ID:
- 5778321
- Country of Publication:
- United States
- Language:
- English
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