Engelhard Corporation

Englehard Corporation

Engelard Corporation

Dwight F Barger

David B Bartholic

William J Reagan

Andrew S Moore

An improved continuous cyclic process for removing oxides of sulfur from a waste gas with a regenerable particulate adsorbent in which hot adsorbent particles pick up SOx in a first fluid transport riser, followed by separation of clean gas from sulfur-contained particles which are then recycled to a desorber in which they are contacted at elevated temperature with a mixture of reducing gas and water vapor for release of sulfur as hydrogen sulfide. The adsorbent particles are then recycled in the process. Means are provided for removing particulates in the waste gas.

Gas/solid contact method for removing sulfur oxides from gases

An improved hydrocarbon conversion process is disclosed of the type employing circulating solids between a reactor (contactor) and regenerator (combustor). The entire process is in the dilute phase and is characterized by all the catalyst passing through the cyclones and never returning to a dense bed in either the reactor or regenerator.

Hydrocarbon conversion-regeneration process using dilute and dense beds

An improved heat balanced hydrocarbon conversion process is disclosed of the type employing circulating solids between a riser reactor (contactor) and regenerator (combustor). The ratio of circulating solid to hydrocarbon feed (C/O or cat-oil ratio) is increased by: directly cooling a portion of hot freshly regenerated contact material; passing a portion of hot regenerated material into the steam stripper; cooling hot regenerated contact material and charging it to the riser downstream of charging uncooled hot regenerated material which charging hydrocarbon feed to the base of the riser along with lift gas or steam; or lifting hot regenerated contact material by a carbonizable lift gas into the riser before contacting it with hydrocarbon feed which is injected higher in the riser.

Hydrocarbon conversion with hot and cooled regenerated catalyst in series

An improved heat balanced hydrocarbon conversion process is disclosed of the type employing circulating solids between a riser reactor (contactor) and regenerator (combustor). The ratio of circulating solid to hydrocarbon feed (C/O or cat-oil ratio) is increased by: directly cooling a portion of hot freshly regenerated contact material; passing a portion of hot regenerated material into the steam stripper; cooling hot regenerated contact material and charging it to the riser downstream of charging uncooled hot regenerated material which charging hydrocarbon feed to the bese of the riser along with lift gas or steam; or lifting hot regenerated contact material by a carbonizable lift gas into the riser before contacting it with hydrocarbon feed which is injected higher in the riser.

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High Bridge, NJ, United States of America

Dwight F Barger