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Reactivation of partially poisoned nickel catalyst by bleaching earth
Author(s) -
Drozdowski B.,
GorajMoszora I.
Publication year - 1980
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02883780
Subject(s) - catalysis , chemistry , nickel , adsorption , sorption , rare earth , kinetics , inorganic chemistry , nuclear chemistry , organic chemistry , mineralogy , physics , quantum mechanics
The effect of activated bleaching earth on the hydrogenation kinetics of fats has been studied in a model system containing sodium soaps, phospholipids and allyl isothiocyanate. Both unsupported and supported catalysts were inactivated by these inhibitors. The optimal quantity of adsorbent, when added to the reaction system, caused a maximal increase of hydrogenation rate in the presence of these inhibitors. In the case of partial inactivation of a catalyst with these inhibitors, the addition of bleaching earth resulted in a regeneration of the catalyst’s active surface and an immediate increase in the hydrogenation rate. The effectiveness of this interaction depended upon the inhibitor type, catalyst type and time of contact with catalyst inactivators. The results suggest the positive effect of activated bleaching earth during hydrogenation results from the sorption processes, inhibitor transformations on the adsorbent and direct interaction with the nickel catalyst.