Tuesday, September 13, 2022
Sunday, November 12, 2023
Saturday, March 18, 2023
氯化氢与乙炔气分子配比指标规定()。A、1:1.00~1:1.10B、1:1.10~1:1.15C、1:1.02~1:1.10D、1:1.05~1:1.10...
Sunday, August 6, 2023
Saturday, March 9, 2024
Thursday, December 29, 2022
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
Saturday, September 10, 2022
Monday, February 5, 2024
Tuesday, September 13, 2022
粗氯乙烯压缩的目的()A、提高气体压力B、提高物料沸点C、在常温下进行分馏操作D、除水...
Tuesday, January 9, 2024
Sunday, August 6, 2023
活性炭是()色的粒状物,()()无砂性,不溶于任何溶剂。A、白、无嗅、有毒B、黑、无味、无毒C、黑、有毒、无味D、褐色无味无毒...
Tuesday, August 22, 2023
Tuesday, August 22, 2023
在手动精馏塔的操作时,主要应选择()作为被调参数。A、压力B、温度C、液位D、回流...
Saturday, October 1, 2022
Saturday, September 10, 2022
Monday, January 30, 2023
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
Monday, February 5, 2024
Friday, September 15, 2023