Tuesday, September 13, 2022
问题:氯化氢过量太多是浪费,盐酸生成多,污染环境,副反应多,如多氯化物。...
Friday, May 26, 2023
问题:氯乙烯精馏尾气排空中氯乙烯含量控制在()以下A、15%B、1%C、10%D、8%...
Thursday, June 22, 2023
Monday, February 5, 2024
Friday, December 8, 2023
Saturday, March 18, 2023
问题:废盐酸浓度20~25%,酸中含汞1.1mg/L。...
Friday, December 8, 2023
Monday, February 5, 2024
问题:在实际生产中,乙炔和氯化氢的配比要求()过量,()不过量。氯化氢过量控制在()%。...
Tuesday, August 22, 2023
Friday, September 15, 2023
问题:暂时停车时,转化器系统内应保持()。用()充压保护。...
Saturday, October 1, 2022
Thursday, December 29, 2022
Friday, May 26, 2023
Tuesday, August 22, 2023
Wednesday, July 19, 2023
问题:氯乙烯合成要求氯化氢纯度为()。A、90~92%B、92~93.5%C、96~98%D、93%...
Thursday, June 22, 2023
Tuesday, September 13, 2022
Sunday, August 6, 2023
问题:氯乙烯在0.5MPа时(常温)呈()。A、气体B、固体C、液体D、混合相...
Monday, January 30, 2023
问题:混合脱水主要利用盐酸冰点低的物理性质,将氯化氢与乙炔混合后的气体温度降到(),从而降低了水蒸气在混合器中的饱和蒸汽压而达到对混合气进行()的目的。...
Thursday, June 22, 2023