Use of hydrogen sulfide to reduce the viscosity of bottoms strea

Details Use of hydrogen sulfide to reduce the viscosity of bottoms strea Use of hydrogen sulfide to reduce the viscosity of bottoms strea

1983-03-14

1984-08-14

Gantz, Delbert E.

Mineral oils: processes and products

Products and compositions

Lubricating oils

208 8LE, 208 56, 208 89, 208102, 208107, 208108, 208362, C10G 106, C10G 100, C10G 4500, C10G 900

Patent

active

044655843

ABSTRACT:
Coal, petroleum residuum and similar carbonaceous feed materials are subjected to hydroconversion in the presence of molecular hydrogen to produce a hydroconversion effluent which is then subjected to one or more separation steps to remove lower molecular weight liquids and produce a heavy bottoms stream containing high molecular weight liquids and unconverted carbonaceous material. The viscosity of the bottoms streams produced in the separation step or steps is prevented from increasing by treating the feed to the separation step or steps with hydrogen sulfide gas prior to or during the separation step or steps. The viscosity of the heavy bottoms stream produced in the final separation step is also controlled by treating these bottoms with hydrogen sulfide gas. In a preferred embodiment of the invention, the effluent from the hydroconversion reactor is subjected to an atmospheric distillation followed by a vacuum distillation and the feeds to these distillations are contacted with hydrogen sulfide during the distillations.

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