ABSTRACT
This chapter describes each of the preparative requirements for catalysts in general and for preparation on the laboratory, pilot, and commercial scale. In the preparation of laboratory-scale lots of catalysts, the most frequent method of preparation is via precipitation. In commercial precipitation there is a very wide variety of suitable precipitation vessels. Some of the most reliable types of tanks are the wooden variety built by New England Tank and Tower. There are many other fabricators whose names can be obtained from the Chemical Engineering Equipment Guide or similar sources. The glass agitator is ordinarily set up so that it covers approximately 50–70% of the diameter of the beaker. The agitator also is situated in such a way that it essentially touches the bottom of the beaker, thus avoiding precipitate buildup on the bottom.
