Cities Service Company

Hydrocarbon Research, Inc.

Hri, Inc.

Marvin S Rakow

Michael C Chervenak

Barry Liss

Edwin S Johanson

David Moy

Michael Calderon

A multi-zone fluidized bed hydrocarbon conversion process and apparatus for producing gas and distillable liquid products from heavy hydrocarbon feedstocks. The feedstock is introduced into an upper fluidized bed primary cracking zone maintained at temperature of 850.degree.-1400.degree. F. for cracking reactions therein, and resulting tars and coke are deposited on and within a particulate carrier material contained therein. The carrier material containing said tars and coke descends successively through a stripping zone to remove tars and an interim controlled temperature zone for secondary cracking against an upflowing hot reducing gas, then descends into a lower fluidized bed gasification zone. The gasification zone is maintained at temperature of 1600.degree.-1900.degree. F. by oxygen-containing gas and steam introduced therein to gasify the coke deposits and produce the reducing gas. The stripping zone contains a stationary packing material such as coarse particulate packing which is supported by a refractory apertured grid, or an ordered array of multiple structural members. The decoked hot particulate carrier material is recirculated upwardly through a transfer conduit to the upper fluidized bed primary cracking zone by a transport gas. Hydrocarbon liquid and gas products are withdrawn from the upper cracking zone.

Multi-zone conversion process and reactor assembly for heavy hydrocarbon

A multiple-zone fluidized bed coal conversion process for producing fuel gas and distillate liquid products. The coal is fed into an upper fluidized bed maintained at 950.degree.-1500.degree. F. for devolatilization. The resulting coke and some tars are deposited on a particulate carrier material, which descends along with the larger particles of unreacted coal through a stripping zone into a lower fluidized bed gasification zone, which is maintained at 1700.degree.-2000.degree. F. by steam and O.sub.2 -containing gas introduced therein to gasify the coke and char. Fine particles of unreacted coal and carrier are passed with gas and distillate vapor through a cyclone gas-solids separation step located in the devolatilization zone, from which the solids are returned to the lower bed for further gasification. Ash produced in the lower bed along with the clean hot particulate carrier is transferred through an up-transport tube to the upper bed. The effluent from the devolatilization/hydrogenation zone passes through an external cyclone separator which removes the particles as a disposal stream. Alternatively, the effluent from the devolatilization zone may be passed through a third or uppermost bed of particulate carrier material for heat recovery and more complete removal of tars from the product gas.

Multi-zone coal conversion process using particulate carrier material

An improved process for hydrating with liquid water over a solid catalyst and with a liquid solvent a liquid iso-olefin selected from the group consisting of C.sub.4 iso-olefins and C.sub.5 iso-olefins to form a corresponding product alcohol in the liquid state. The improvement comprises maintaining the liquid iso-olefins, the solvent, and the water in a single liquid phase in order to increase the conversion percentage of the iso-olefin to the corresponding alcohol.

High purity iso-butylene recovery

Growing community of inventors

East Brunswick, NJ, United States of America

Marvin S Rakow