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By Alvin B. Stiles

This paintings presents a pragmatic, step by step advisor to the instruction, creation and operation of all commercially used catalysts, taking into consideration basic protection issues and updated laws from the Occupational overall healthiness management and the Environmental security employer. This moment version includes up-to-date and increased fabric at the regeneration, reactivity and restoration of used catalysts; difficulties relating to environmental catalysis; a special CO oxidation catalyst; and more.;This paintings is meant for chemical, plant, automobile, petroleum, gasoline and layout engineers; and upper-level graduate and graduate scholars in those disciplines.

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2. Washing can be effected much more satisfactorily and uniformly over the filter cake and medium. 3. The filter cake can be washed off the filter medium and reslurried and refiltered if it is desired to perform this type of operation to achieve a very efficient washing. Another type of filter is the disk filter, which, in its simplest form, is a vertical disk covered on both sides with a filter medium that dips into the slurry to a depth of approximately 30% of its diameter. The disk rotates, and as it rotates through the slurry it picks up the filter cake, which then emerges at the top level of the slurry.

It is frequently desirable to use two filter papers to minimize the chance of the slurry bleeding through the filter media. One of the annoying characteristics of filter paper is its tendency to adhere to the filter cake when the cake is discharged from the Buchner funnel. The difficulty of peeling the paper away from the filter cake can be avoided by using a filter cloth cut to the circle size required for the Buchner funnel being used. Cloth filter is not a complete answer because it sometimes is difficult to seal the edges, and under such circumstances it may be desirable to employ a combination, using paper below < previous page page_30 next page > < previous page page_31 next page > Page 31 the filter cloth next to the Buchner face.

Disk filters are frequently used in the mining industry, where the slurry comprises a finely pulverized rock. As a consequence it is obvious that the catalyst that is processed through this type of device must be an easily filtered, rather grainy type of material. < previous page page_42 next page > < previous page page_43 next page > Page 43 5 Drying: Containers, Trays, and Other Drying Auxiliaries Preliminary to a consideration of the drying facilities, one must consider the containers in which the filter cake or other material to be dried is to be placed.

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