Book Synopsis CONTINUOUS DISSOLVER THEORY. III. DEVELOPMENT OF GENERAL TANK-FLOW RELATIONSHIPS WITH APPLICATION TO PILOT PLANT DATA FOR A FLOODED COLUMN DISSOLVER. by :
Download or read book CONTINUOUS DISSOLVER THEORY. III. DEVELOPMENT OF GENERAL TANK-FLOW RELATIONSHIPS WITH APPLICATION TO PILOT PLANT DATA FOR A FLOODED COLUMN DISSOLVER. written by and published by . This book was released on 1959 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: General relationships are developed for the performance of continuous flooded dissolvers based on complete mixing, such as tank flow, uniform packing characteristics of metal, and a first-order rate law. The form of the final equation is the same as that derived for the nonmixing or tube-flow case discussed in earlier reports of this series, with differences appearing only in the term that expresses the concentrations of metal and dissolvent in the liquid phase. The relationships are applied to available pilot plant data on the mercury-catalyzed dissolution of four shapes of 2S aluminum elements. The data cover a range of catalyst concentrations from 1.5 x 10−6 to 3.75 x 10/sup - 4/ molar Hg/sup 2+/ and metal bed heights from 1 to 10 feet in a 2-inch pyrex column. The average initial dissolvent concentration was 5.6M nitric acid. Round rods, flat plates, tubes, and flattened tubes are compared. The data for the round rods are utilized to determine the effective reaction velocity constants at the various catalyst concentrations. The general dissolver equation is used to predict the effect on dissolution rate of the shape of metal elements, liquid phase flow rate, and height of the bed of elements. Calculated rates follow the trends in the data, but not quite so well as calculated rates for the nonmixing or tube-flow case. The mathematical representation of the model is generally consistent with the pilot plant data. (See also IDO-14450 and IDO- 14451.) (auth).
