Stone & Webster Engineering Corp.

Dennis A Duncan

Robert J Gartside

Axel R Johnson

Joseph L Ross

Joseph M Gondolfe

Herman Woebeke

Edwin J Bassler

A cracking furnace within the firebox of which is located a ceramic structure presenting opposing wall surfaces which thereby define a slot-like passageway through which hydrocarbons may be fed through the firebox of the furnace. This ceramic structure is capable of service under much greater heat loads and temperatures than are metallic reaction lines as have heretofore been used, allowing for a greater firebox temperature which in turn produces an even more rapid cracking of saturated hydrocarbon into ethylene at millisecond residence times within the firebox limits.

Ceramic slot reactor for ethylene production

A furnace construction for cracking of saturated hydrocarbon feed stocks to olefinic product mixtures, wherein the reaction lines of such furnace are fabricated of a ceramic refractory feed inlet pipe coaxially located with a ceramic refractory tube to define an annular space there between which in part is located without and within the radiant heating firebox volume of such furnace, this to provide for a zone wherein hot cracked olefin product gas is quenched in temperature in such annular space outside of such firebox and a cracking zone within the firebox within which hydrocarbon feed is cracked to an olefin containing product gas composition. The ceramic refractory material construction permits of such pipe-tube reaction line structure to be exposed to a much greater heat/temperature content of which the firebox is capable than reaction lines of metallic construction. Cracking predominantly occurs within the annular space, meaning that the cylindrical ceramic refractory structures may be of diameters sufficient to provide for high strength structures. The greater firebox temperatures permitted with a refractory allows for the use of a shorter reaction line structure.

Ceramic dip pipe and tube reactor for ethylene production

A process for producing liquid fuels from heavy hydrocarbons such as residual oil in which the cracking temperatures are in the range of 800.degree. F. to 1200.degree. F., and the residence times are between 0.05 seconds and 0.50 seconds.

Low residence time catalytic cracking process

A process for producing olefins and gasoline from residual oil by thermally cracking a side cut fraction from a fractionation tower, quenching the cracked product with residual oil, producing coke from a portion of the quenched product and using a portion of the coke to provide reaction heat for the thermal cracking.

Olefin production from heavy hydrocarbon feed

A process for pretreating residual oil by thermal regenerative vaporizing and pretreatment at short residence times and catalytically cracking the pretreated effluent from the thermal regenerative pretreatment process.

Hydrocarbon pretreatment process for catalytic cracking

A system is provided for recovering hydrocarbons from hydrocarbon-containing solids such as oil shale, tar sands or coal. The process includes preheating finely divided solids prior to introduction to a low residence time tubular reactor where a portion of the hydrocarbon is removed from the solids. The solids are then separated from the hydrocarbon product, stripped of residual hydrocarbons then transferred to a gasifier to burn the remaining entrapped hydrocarbon to serve as the heat source for the process.

Growing community of inventors

Texas City, TX, United States of America

Dennis A Duncan