Paradichlorobenzene melts at 53oC, while orthodichlorobenzene melts at -17.6oC. They form a eutectic of 87.5 wt% of the ortho isomer at -23oC. The normal boiling points of these two isomers differ by about 5oC. A mixture of 80 wt% of the para isomer at the saturation temperature of 43oC is fed to the top of a falling-film crystallizer, where coolant enters at 15oC. If 8-cm i.d. tubes are used, determine the time for the crystal-layer thickness at the top of the tube to reach 2 cm. Which isomer will crystallize? From Perry’s Chemical Engineers’ Handbook, ρc =1.458 g/cm2 and ∆Hf =29.67 cal/g. Crystal thermal conductivity is 0.15 Btu/h-ft-oF for either isomer.
Paradichlorobenzene melts at 53oC, while orthodichlorobenzene melts at -17.6oC. They form a eutectic of 87.5 wt% of the ortho isomer at -23oC. The normal boiling points of these two isomers differ by about 5oC. A mixture of 80 wt% of the para isomer at the saturation temperature of 43oC is fed to the top of a falling-film crystallizer, where coolant enters at 15oC. If 8-cm i.d. tubes are used, determine the time for the crystal-layer thickness at the top of the tube to reach 2 cm. Which isomer will crystallize? From Perry’s Chemical Engineers’ Handbook, ρc =1.458 g/cm2 and ∆Hf =29.67 cal/g. Crystal thermal conductivity is 0.15 Btu/h-ft-oF for either isomer.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Paradichlorobenzene melts at 53oC, while orthodichlorobenzene melts at -17.6oC. They form a eutectic of 87.5 wt% of the ortho isomer at -23oC. The normal boiling points of these two isomers differ by about 5oC. A mixture of 80 wt% of the para isomer at the saturation temperature of 43oC is fed to the top of a falling-film crystallizer, where coolant enters at 15oC. If 8-cm i.d. tubes are used, determine the time for the crystal-layer thickness at the top of the tube to reach 2 cm. Which isomer will crystallize? From Perry’s Chemical Engineers’ Handbook, ρc =1.458 g/cm2 and ∆Hf =29.67 cal/g. Crystal thermal conductivity is 0.15 Btu/h-ft-oF for either isomer.
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