Niagara FILTERS - Industrial & Engineering Chemistry (ACS

May 18, 2012 - Niagara FILTERS. Ind. Eng. Chem. , 1960, 52 (4), pp 51A–51A. DOI: 10.1021/i650604a737. Publication Date: April 1960. Copyright © 196...
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and differentiating with respect to η and assuming that En+1 is large compared to 1 : àW _ ( l E)\nE an £>+>

K

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Equation 2 can be used to compute the incremental amount of solute recovered from the last stage added. The only effect of variation in the extract still will be to raise or lower absolute recovery level in the extractor; but the optimum number of stages will not be affected. Passing to the extract still, two independent variables can be set. A design procedure might be to set a distillate composition (amount of solute remaining in the solvent) and compute an optimum distillation process to produce this. Annual cost of this optimum process is then added to the annual cost of additional product lost due to recycling of product in the solvent. This procedure is repeated for several distillate compositions until a minimum total cost is found. Finally, the solvent recovery process is optimized as mentioned previously.

specialists in

LIQUID SOLIDS

Niagara

separation

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F I L T E R S

by C e n t r i f u g a l Extract i o n · Pressure Leaf and Continuous Vacuur or Pressure F i l t r a t i o n F i l t e r Media

Example

Design a process to separate 10,000 lb./hr. of 30 wt. % acetic acid in water using 85 vol. % ethyl acetate-15 vol. % benzene as a

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TOWER

DIAMETER-FEET

Figure 3. Distillation costs as a function of tower diameter and distillate composition

A

Niagara

FILTERS

DIVISION

Of

American Machine and Metals, Inc EAST MOLINE,. ILLINOIS

Circle No. 4 on Readers' Service Card VOL. 52, NO. 4

·

APRIL 1960

51 A