Inhibition of coke formation during vaporization of heavy hydrocarbons
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United States of America Patent
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Mar 2, 1993
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N/A
app pub date -
Dec 2, 1988
filing date -
Dec 2, 1988
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Expired
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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.
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