Method for cracking hydrocarbons
OwnerArmin Dornerinventor
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Abstract
Hydrocarbons are subjected to hydrogenation, pressure reduction and separation into liquid and gaseous fractions. The gaseous fractions are purified and desulfurized. Hydrogen-rich components of the gaseous fraction are returned to the hydrogenation stage. Hydrocarbon-rich components of the gaseous fraction and components of the liquid fraction are cracked and fractionated. Residue is partially oxidized with oxygen and steam. Gas produced by the partial oxidation is desulfurized and separated, and hydrogen is returned to the hydrogenation stage. A polymer free fraction of the residue is returned to the feed stock and to the hydrogenation stage, a heavy residue component of the initial liquid fraction is partially oxidized with the residue.
Claims7
In a method for cracking hydrocarbons, in which the hydrocarbons are first hydrogenated and subsequently are thermally cracked, the improvement comprising converting at least a part of the residue of the thermal cracking to a gas mixture by partial oxidation, desulfurizing and separating a hydrogen-rich fraction from the gas mixture and conducting the hydrogen-rich fraction to the hydrogentation step.
Dependencies are inferred from the claim text.