Pullman Incorporated

Gulf Research & Development Company

James R Murphy

Harry C Stauffer

Harry C Murphy, Jr

Millard C Bryson

Alvaro A Murcia

A catalyst regenerator is disclosed which incorporates a closed vessel having a centered stand pipe concentrically arranged within a spent catalyst distributor. The catalyst is carried upwardly by the distributor and is scattered evenly and concentrically about the distributor. The spent catalyst is deposited on or near the top of the dense phase catalyst bed. A symmetrically arranged, preferably triangular fresh air distributor system including a number of transverse branches having small nozzles mounted thereon forms a grid pattern below the lower portions of the catalyst bed in the regenerator. Air for burning of the coke on the spent catalyst is introduced evenly to minimize the size of the air bubbles in the dense bed. The catalyst in the lower portions of the bed has a minimum of coke remaining thereon. The oxygen of the air which is introduced in the lower portions of the bed is consumed by combustion of the reduced quantity of coke in the lower portions of the bed. As the air flows through the dense bed to the upper surface, the catalyst encountered at the higher levels has more coke on it. However, the air is partly depleted of oxygen which prevents formation of excessive particle temperatures in the dense phase fluid bed. The region of high coke concentration experiences controlled burning achieved by controlled partial oxygen depletion. This tends to burn more of the carbon in the bed, thereby reducing afterburning in the dilute phase above the bed. This provides uniform heating of the catalyst to a higher temperature, thereby reducing the heat required in the feed stock pre-heater. Carbon monoxide disposal equipment is also eliminated by consumption of most of the carbon monoxide within the bed, all without afterburning thereabove.

Apparatus for regeneration of cracking catalyst

A pretreating process for upgrading heavy petroleum feedstocks is disclosed. In a pretreating zone, the feedstock is contacted, in the presence of hydrogen, with a cracking catalyst. In this pretreating zone, the heavy metals content of the feedstock is reduced, and a significant quantity of the feedstock coke precursors are converted directly to oils which are readily recoverable from the pretreating zone effluent. Further, some unconverted coke precursors and the heavy metals complexed therewith are separated from the pretreating zone effluent in a solid asphaltic fraction. The pretreating zone effluent remaining after separation of this solid asphaltic fraction is an upgraded feedstock having significantly reduced heavy metal, sulfur, and Conradson carbon residue contents.

Process for separating solid asphaltic fraction from hydrocracked

An integrated process is described wherein a heavy oil catalytic cracking unit is integrated with a pretreating zone. In the pretreating zone, petroleum feedstock is contacted, in the presence of hydrogen, with used equilibrium catalyst purged from the cracking zone to reduce the metals, carbon residue, and sulfur content of the petroleum feedstock prior to charging the feedstock to the cracking zone of the heavy oil catalytic cracking unit.

Integrated heavy oil cracking process utilizing catalyst separated from

A process for the production of lubricating oil in order to obtain lower viscosity lubricating oils of increased viscosity index by separating a crude lubricating oil into a residual fraction and a distillate fraction and thereafter subjecting the residual fraction to hydrotreating and separately subjecting the distillate fraction to hydrotreating under more severe conditions than employed in hydrotreating the residual fraction.

Growing community of inventors

Houston, TX, United States of America

James R Murphy