Houdresid process

Houdresid process). Although the upper economic limit of catalyst contamination has been reported to be about 200 ppm of nickel and vanadium on the catalyst, such a supposedly poisoned catalyst was used in the commercial operations. After more than a million barrels of reduced crude oil (Ni, 4.6 Va, 6.1 and Fe, 9.4 ppm) had been processed, the activity of the catalyst had dropped from 26 to only 23.6 by the Cat. A activity test, but scarcely any addition of catalyst, other than to replace the attrition of 0.4-0.5 lb per bbl of feed, was necessary. Meanwhile, the iron had risen and stabilized at 1.4 per cent of the catalyst, and the nickel and vanadium to over 400 ppm each. At the conversion of about 68 per cent, yields were nearly the same as those indicated in Fig. 21-3, except that the coke yield was somewhat high (7 to 8.2 per cent rather than 5.5 to 6.5), and the B-B cut was smaller (12 to 15 per cent rather than 18). 

Houdresid A catalytic petroleum cracking process, similar to Houdriflow, adapted to processing residues. 

Houdresid catalytic cracking a continuous moving-bed process for catalyti-cally cracking reduced crude oil to produce high octane gasoline and light distillate fuels. 

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