Uop Lcc

Universal Oil Products Company

Bennie I Bunas

Kenneth D Uitti

James S Kellar

An apparatus and process for the solvent deasphalting of petroleum stocks. An asphaltene containing feedstock enters an intermediate point of a vertical trayed column and passes downward countercurrent to a rising solvent stream. The resulting extract stream rises through more trays and then through two adjacent U-tube heat exchange bundles stabbed into the column from opposite sides. Asphaltene containing substances are precipitated by this heating. The extract is then admixed by a horizontal shroud and a pair of horizontal baffles above the heat exchangers and retained in a quiescent settling zone before being removed from the column.

Solvent deasphalting apparatus

A sieve-type fractionation tray which has been adjusted for operation at a reduced vapor flow rate. Adjustment is achieved by placing an imperforate plate across the vapor passageways in a manner which selectively seals the passageways located nearest the outlet downcomer. Also a sieve-type fractionation tray having vapor passageways only on the liquid receiving lateral half of the tray.

Sieve-type fractionation trays

Maximum removal of asphaltic material, including high molecular weight metallic contaminants, from a hydrocarbonaceous charge stock is achieved through the utilization of a solvent extraction zone provided with direct heating facilities in an upper portion thereof.

Hydrocarbon deasphalting process and solvent extractor therefor

Maximum removal of asphaltic material, including high molecular weight metallic contaminants, from a hydrocarbonaceous charge stock is achieved through the utilization of a solvent extraction zone provided with direct heating facilities in an upper portion thereof. A portion of the solvent-rich hydrocarbon phase is withdrawn from the extraction zone, increased in temperature and introduced into an asphalt settling zone. The separated solvent/hydrocarbon stream, substantially asphalt-free, is reintroduced into the extraction zone at the higher temperature.

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Des Plaines, IL, United States of America

Bennie I Bunas