One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； June 06
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This post was last edited by Forever※Undeterred on 2016-6-6 at 22:52. Multiple-choice question: The main reasons for the high acetylene content in the purified monomer obtained from the distillation process in the calcium carbide method for VCM production are: ( ) A. Excess acetylene or low conversion rate in the synthesis system B. Excessively low temperature at the bottom of the tower； C. Fluctuations in hydrogen chloride purity lead to fluctuations in off-gas discharge and in the flow rate of material leaving the bottom of the tower. D. Excessive polymer formation in the low-boiling point tower can cause blockages; opening the inlet valve too quickly when switching adsorbers also results in fluctuations in the flow rate of material leaving the bottom of the tower. Answers: ABCD
A. Excess acetylene in the synthesis system or low conversion rate
B. The temperature at the bottom of the tower is too low； When the top temperature of the low-boiling tower or the feed temperature is too low, the reflux rate increases significantly, resulting in a sharp rise in the gas volume supplied by the compressor
The question is incorrect: there are four multiple-choice answers