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Activated Carbon based powder and paste catalysts are commonly
used in liquid phase reactions. The Catalysts in paste from
(50-60% moisture) should be preferred when the presence of
water in the process is not detrimental. Moreover, handling
paste is much simple as it reduces dusting and loss of precious
metal.
Pd / C can cause
fire when dry mixed with Methanol. For reactions using
Methanol as solvent, first mix the Catalyst with water to form a
paste before charging the catalyst along with methanol into the
reactor.
Pd/C does not catch
fire on its own but when in contact with Hydrogen gas and air
together it not only catches fire but can explode as well.
Hence, storage should be done in an environment devoid of
Hydrogen. Take special care of this aspect even while
opening the packets of the catalyst.
Pd/C can catch fire
due to static charge generated due to abrasion of dry catalyst
powder with plastic bag (container) during transfer of catalyst
from its plastic bag into the reactor. Therefore, do not
empty out the bag into the reaction vessel at once with
force. Add slowly.
During filtration
and thereafter, do not allow spent catalyst to dry due to
vaporization of solvent. Wash the catalyst with D.M. water
after solvent removal. Pack and transport in wet cake form
for disposal (either by recovery of Pd metal, its refining and
reformulation into fresh catalyst or for sale of spent material.)
In the event of
fire, contain it by pouring water. After fire has been put
off, collect all the wet residues manually and pack the same in a
plastic bag and send it to Vineeth for recovery of Palladium metal
and consequent conversion into fresh catalyst.
Inhalation of
catalyst powder can cause imitation of the respiratory
tract. Therefore use mask while handling this product.
In case of powder
particles coming into contact with skin or falling into eyes, wash
the affected part of the body or eyes profusely with water.
Shelf
Line : Three months from the date of manufacture, if
stored in an environment where temperature is maintained below 300C.
Disposal
: Immediate arrangements should be made to send back
the spent catalyst to the manufacturer for reprocessing. The
Catalyst for disposal should be washed with water to reduce the
organic content to a minimum and send to Vineeth for metal
recovery in a water wetted condition. |