Production Technology [Daily Question] Tuesday, November 29, 2011

Thread Content

This post was last edited by wsm1988 on 2011-11-28 at 22:17. Multiple-choice question: 1. At atmospheric pressure, the boiling point of benzene is 80.1°, while that of cycloethane is 80.73°. To separate this mixture of the two components, it is appropriate to use ( ). A. Azeotropic distillation ； B. Ordinary distillation ； C. Extractive distillation ； D. Steam distillation 2. In the design of a distillation column, if the feed condition changes from saturated steam feed to saturated liquid feed, with all other conditions remaining unchanged, the number of theoretical plates required ( ). A. Increase ； B. Reduce ； C, unchanged ； D. Uncertain. 3. Which of the following operations in a distillation tower is carried out in the correct sequence? A. First, supply heating steam and then supply condensate water ； B. First achieve full reflux, then adjust the reflux ratio ； C. Stop the reboiler first, then stop the feed ； D. Stop the cooling water first, then stop product production. Note: 1. Please hide your reply; for instructions, see: http://bbs.hcbbs.com/thread-492556-1-1.html. 2. Do not edit after replying. : d’ f: p8 K @ $ X8 q7 r2 s5 Q+ D! C! Q 3. Participants must receive a reward. Answer: 1, C 2, A 3, B