Selective adsorption and removal of Palladium (Pd) using Activated Carbon as efficient adsorbents
Osaka Gas Chemical has long manufactured and sold various activated carbons for the purpose of decoloring and removing impurities in the refining process of synthetic materials in the fields of pharmaceutical materials, chemical intermediates, and electronic materials.
Activated carbon can not only decolorize and remove impurities, but at the same time it can adsorb and remove selectively of Palladium (Pd).
Using Osaka Gas Chemicals high quality activated carbons "ANOX series" for this application enables cost saving versus the conventional methods of combined use of activated carbon and zeolite or methods using ion exchange resins or scavenger.
The ANOX series was specially developed for removal of polymerization inhibitor when purifying polymers, resins, polymers, monomers, etc.
Contact us for consultancy and sample requests.
Adsorption mechanism of a noble metal catalyst
The biggest benefit of using activated carbon as a precious metal supported catalyst carrier is that it can easily separate and collect precious metals that it carries. Catalytic supports such as zeolite, alumina, and silica have the problem that it is difficult to separate and collect valuable (= adsorbed) expensive precious metals. Osaka Gas Chemicals' activated carbon for catalyst supports has a very small amount of ash at burning. Ash hinders collection of precious metals.
Activated carbon for precious metal supported catalyst supports is required to be highly pure. If the amount of impurities inhibiting the catalytic reaction is low, it can be a catalyst with high reactivity. Furthermore, we will adjust the shape, particle size, microstructure (pore distribution) of activated carbon according to the usage conditions of each user and provide various grade products.
The expected characteristics of Adsorption
Activated carbon of Osaka Gas Chemical has pore
distribution and surface characteristics effective for removal of homogeneous
catalyst remaining after the reaction, and it is possible to selectively adsorb and
remove it.
Various laboratory samples will be provided.Please contact
us.
Adjustments of pore size and particle size depending on purposes and applications
<An example of the adjustment of the pore size>
<An example of the adjustment of the particle size>
We can provide highly functional activated carbon with special functions by adjusting the pore size, volume, particle size, etc. according to various requests (eg, removing homogeneous catalysts containing palladium, nickel, etc. from the solution).
Effective use of Selective Adsorption Activated Carbon in the fields of electronic material, pharmaceutical intermediates and chemical intermediates
One of previous methods for metal removal
"Scavenger", a conventional metal removal method, is
a resin type metal adsorbent and is known to selectively remove metals in a target
liquid by using a structure with high metal coordination. And it is used in the
pharmaceutical industry etc. to reduce catalytic metals etc. used for reaction to
below.
However, in the scavenger, the selection performance changes depending on the type
of metal and its state. It is pointed out that choosing adsorbents properly and high
cost is a problem. Osaka Gas Chemical's activated carbon "Shirasagi ANOX-1"
"Shirasagi ANOX-2" can be removed without regard to zero valence, divalent valence
and state, and it is less expensive compared to scavengers. A metal scavenger is an
adsorbent obtained by modifying the surface of an inorganic adsorbent such as silica
gel or a synthetic resin of polystyrene type with a functional group capable of
coordinating to a metal atom such as an amino group, a thiol group, or a thiourea
group. And it is used to reduce and eliminate metals derived from homogeneous
catalysts and raw materials. Since these products differ greatly in removal ability
from the type and valency of target metal, it is necessary to newly select again if
the catalyst to be used changes. Osaka Gas Chemical's activated carbon "Shirasagi
ANOX - 1" "Shirasagi ANOX - 2" has stable removal capability regardless of metal
type and valence. Also, since the surface is not modified with functional groups, it
does not affect. Furthermore, activated carbon is a low cost adsorbent made of
carbon, so it is possible to operate the removal process at low cost.
Contact us - Inquiry form
Please fill out the form in English. Fields marked ※ must be filled out.
