Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1983-10-18
1985-09-03
Torrence, Dolph H.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
260465C, C07D21357, C07C12014
Patent
active
045394091
ABSTRACT:
A process is disclosed for preparing coated catalysts, inter alia, for gas phase oxidations in organic chemistry, comprised of an inert support and a coating of catalyst material enclosing this support, wherein a suspension of the starting material for the coating is sprayed onto an agitated bed of the support, while the suspending medium is being partially removed by a gas stream, and the raw material is then dried and heat-treated. For this purpose, the support bed is mechanically agitated and loosened by a gas stream blown in from below. The catalyst precursor containing a binder and, if appropriate, a pore-former is sprayed in an increasing amount from above onto the bed, the ratio between suspending medium sprayed on and drawn off remaining about constant. The thermal expansion coefficient of the precursor as a dry powder must not deviate by more than 15% from that of the support. The applied coating is densified by continuing the mechanical and fluidizing mixture motion, the material is then dried in a continuing gas stream and heat-treated, if appropriate after decomposition of an added pore-former.
REFERENCES:
patent: 3637797 (1972-01-01), Decker et al.
patent: 4305843 (1981-12-01), Krabetz et al.
Arntz Dietrich
Burkhardt Werner
Heilos Johannes
Manner Reinhard
Prescher Gunter
Degussa - Aktiengesellschaft
Torrence Dolph H.
LandOfFree
Process for preparing aromatic nitriles does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for preparing aromatic nitriles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing aromatic nitriles will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-614778