Inhibition of coke formation during vaporization of heavy hydrocarbons
US5190634A · kind A · utility
46Cited by
9References
3Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 2, 1988 |
| Grant date | Mar 2, 1993 |
| Priority date | — |
| Expiry date | Dec 2, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2400/20
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An improved process for vaporizing a crude petroleum feedstock, preferably one boiling in the vacuum gas oil range or higher, prior to thermal cracking to olefins, wherein such feedstock is preheated, in one or more stages, in the convection section of a tubular steam cracking furnace, characterized by conducting the preheating in the presence of a small amount of hydrogen, preferably at a hydrogen/feed ratio of from about 0.01 to about 0.15 wt. %, so as to inhibit coke formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.