Premium
Poisoning of Pd–carbon catalysts by sulphur, chloro and heavy metal compounds in liquid phase hydrogenation of o ‐nitrophenol to o ‐aminophenol
Author(s) -
Choudhary Vasant R.,
Sane Mukund G.
Publication year - 1998
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/(sici)1097-4660(199812)73:4<336::aid-jctb963>3.0.co;2-w
Subject(s) - catalysis , chemistry , thiophene , sulfur , metal , carbon fibers , zinc , inorganic chemistry , nitrophenol , chloride , dichloroethane , phase (matter) , nuclear chemistry , organic chemistry , materials science , composite number , composite material
The poisoning of Pd–carbon (4·1% Pd) catalysts by thiophene, dichloroethane, mercuric chloride and lead, zinc and mercuric acetates at different concentrations (0–5000 g m −3 ) in the liquid phase hydrogenation of o ‐nitrophenol to o ‐aminophenol (at 308 K and H 2 pressure of 1508 kPa) in a three‐phase stirred slurry reactor has been investigated. The hydrogenation activity of the catalyst is drastically reduced due to the presence of these poisons in the reaction mixture, even at a very low concentration of poison (20 g m −3 ). Among the poisons, mercuric acetate was found to be the most potent. © 1998 Society of Chemical Industry