Abstract
The authors report on an investigation of catalytic cracking of a vacuum gasoil obtained from atmospheric resid, with an activating additive. Three samples of vacuum gasoil were used in this work: Sample 1 was taken from a commercial unit, the atmospheric resid being distilled without additive; Sample 2 was taken from the same unit, with laboratory distillation of the atmospheric resid with 1.5% extract by weight; Sample 3 was prepared from Sample 2 by adding the extract as an activating additive before catalytic cracking. The physicochemical characterizing of Samples 1 and 2 are listed. Because of the low concentration of additive, the composition and properties of Sample 3 were practically the same as Sample 2. All three feeds were cracked in a flow-type laboratory unit with a stationary fluidized bed of zeolite-containing catalyst.
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