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Asked Jan 29, 2019

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6. The manufacture of such products as penicillin, tetracycline, vitamins, and other pharmaceuticals, as well as photographic chemicals, dyes, and other fine organic compounds, usually requires separating the suspended solids from their mother liquid by centrifugation, and then drying the wet cake. A closed-loop system (figure) for centrifuge unloading, drying, conveying, and solvent recovery is comprised of equipment especially designed for handling materials requiring sterile and contamination-free conditions.

Given the experimental measurements on the pilot plant equipment outline in figure:

a. Draw and label a flowchart of the process.

b. What is the lb/hr of the recycle stream R?

Step 1

Part (a)

The basis of the process is taken as 98 lb/hr of the feed. The symbol used for vitamins is ‘V’.

Let *ṁ* is the mass flowrate of the streams in lb/hr and *x _{i}* is the mass fraction of the species

The labelled flowchart of the given process is:

Step 2

Part (b)

For stream (5), the given condition is 4% H_{2}O per lb vitamins which is written as equation (1). Also, the sum of mass fractions of all the species in a mixture is equal to 1 which is written as equation (2). Thus,

Step 3

Simultaneously solve equation...

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