Process for converting heavy oils or petroleum residues to gaseo

Details Process for converting heavy oils or petroleum residues to gaseo Process for converting heavy oils or petroleum residues to gaseo

1982-11-24

1983-09-20

Gantz, Delbert E.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208 59, 208950, C10G 6512, C10G 4720

Patent

active

044054424

ABSTRACT:
This process for converting a charge of heavy oils or petroleum residues to gaseous and distillable hydrocarbons comprises the steps of (a) admixing said charge with a first hydrogenated recycle oil obtained in a subsequent step of the process, heating the mixture to 350.degree.-450.degree. C., admixing it with a reducing gas at a temperature of at least 800.degree. C. and maintaining a temperature of 530.degree.-850.degree. C. and a pressure of at least 20 bars for 0.1 to 60 seconds (b) admixing the resultant product with a second hydrogenated recycle oil whose temperature is lower than 300.degree. C., thereby decreasing the temperature of the resultant mixture to less than 450.degree. C., then contacting it with a steam-hydrogen stream, thereby vaporizing at least 80% of the liquid to a gaseous phase (c) treating the unvaporized remaining fraction with oxygen and steam to form a reducing gas at a temperature of at least 800.degree. C., used at least partly in step (a), (d) hydrogenating the gaseous phase from step (b) and recovering therefrom a light fraction distilling below 250.degree. C., recycling at least partly the remaining gaseous phase to step (b) after removal of CO.sub.2 and H.sub.2 S therefrom and (e) recycling the remaining hydrogenated heavy oil fraction, distilling above 250.degree. C., to steps (a) and (b).

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