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Additional info for Chemical Reagents, Their Purity And Tests
56. 790. melting point (°C) boiling point (°C) liquid density (kg/m3) (This exercise appeared on an exam. 9 Design a process to recycle all the components in a pharmaceutical tablet. Each tablet is chiefly sugar. 1 mm diameter), hard capsules that contain a drug. The capsules are impermeable to water, which protects the drug. The capsules melt at 95°F (35°C) to release the drug in one's stomach. The tablets are to be recycled because the dosage is incorrect; there are too many capsules per tablet.
Consider the two process schemes diagrammed on the following page. Scheme I uses N2 as the inert gas in the reactor and Scheme II uses SO2 as the inert gas in the reactor. (A) In which sequence is the separation the easiest? State at least two reasons for your choice. Use the table of thermodynamic data on the following page. 40 Exercises Scheme I. 1 by Rudd, D. R, Powers, G. , and Siirola, J. J. 1973. Process Synthesis, Prentice Hall, Upper Saddle River, NJ, p. 12 and pp. 5 x 104 (B) Schemes I and II assume that O2 and S enter the reactor in exact stoichiometric ratio.
Each unit on your flowsheet should perform only one operation, even though in actual practice one machine may perform multiple operations in sequence. Add the necessary streams for water, soap, bleach, and air and list the components in all streams. Laundry is an extremely complex system. Those of us who do the laundry don't get enough credit for the technical decisions we make every day. Some very serious science goes into doing the laundry. K. Obendorf, Professor of Textiles and Apparel, Cornell University, in Smithsonian Magazine, September 1997.