Ashland Oil, Inc.

Ashland, Inc.

William M Rice

Gerald O Henderson

Paul W Walters

Lloyd E Busch

Charles W Palmeter

Ric T Zima

Minor amounts of C.sub.3 -C.sub.4 hydrocarbons from amine absorbents used in removing H.sub.2 S liquid C.sub.3 -C.sub.4 hydrocarbon are recovered. The process features recovery of the C.sub.3 -C.sub.4 hydrocarbon in a hydrocarbon gas from a second absorption zone where H.sub.2 S is removed from the hydrocarbon gas, the hydrocarbon gas functioning as a stripping gas.

Fuel gas stripping of rich amine to remove hydrocarbons

A method and arrangement of apparatus employed is described for regenerating solid particles comprising carbonaceous deposits. At least three sequential stages of separation of flue gases from entrained solids are provided in association with an upflow catalyst regeneration operation.

Regeneration of fluid solid particles and separation of solid particles

Novel riser reactor design with associated multiple feed inlet means for contacting regenerated catalyst particles with low quality naphtha, C.sub.5 minus wet gas product of hydrocarbon conversion and a residual oil feed comprising components boiling above about 1025.degree. F. and comprising metal contaminants. Low quality naphtha from thermal cracking is charged either separately or in admixture with C.sub.5 and lower boiling wet gas product of hydrocarbon conversion to the bottom portion of the riser conversion zone for contact with freshly regenerated zeolite cracking catalyst. The vaporous material thus charged conveys the regenerated catalyst at an acceptable velocity to an expanded section of the riser wherein residual oil is charged by a plurality of nozzle means penetrating the wall of the riser in the transition section to the expander user section. A suspension of hydrocarbon vapors and catalyst particles is then passed through the riser discharge for a desired contact time before separation by ballistic separation with a cup about the riser upper to the riser end.

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Ashland, KY, United States of America

William M Rice