Modification of bifunctional catalyst activity in hydroprocessin

Details Modification of bifunctional catalyst activity in hydroprocessin Modification of bifunctional catalyst activity in hydroprocessin

1990-10-04

1991-11-05

Myers, Helane E.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural serial stages of chemical conversion

208111, 208 49, C10G 1302

Patent

active

050629433

ABSTRACT:
The equilibration of a zeolitic hydrocracking catalyst is accelerated by the addition of nitrogen compounds to the hydrocracker feed during the start of cycle (SOC). Addition of the nitrogen compounds reduces the exotherm, indicative of a decrease in the hydrogenation activity of the catalyst consequent upon the addition of the nitrogen. The reduced hydrogenation level decreases hydrogen consumption at this point in the cycle so that units which are hydrogen constrained may be operated under more favorable conditions. In addition, the attainment of equilibrium or lineout conditions is accelerated and yield benefits, particularly in the production of middle distillates are observed.

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Akzo Catalysts Symposium '88, 6-88, Kurhaus, The Netherlands, pp. 1-14, "Hydrocracking: Activity and Selectivity as a Function of Process Conditions and Catalysts Families".

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