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氮吹仪在使用有毒的氯气做

点击次数:1852  发布日期:2016-11-26  【打印此页
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GONGZUOSHIJIAN:ZHOUYIZHIZHOUWU 8:00-18:00

  第二步 氮吹仪ClCH2CH2OH+Ca(OH)2+HClC2H4O+CaCl2+H2O 总包反应为:HCH+Cl+Ca(OH)CHO+CaCl+HO 22222422 各物质质量/g  2871 74 441 11118 产物的质量/g 44 废物的质量/g1 111+18=129 4 44g 原子利用率= (4 44+111+18)g×10 00%=25%   即生产1kg环氧乙烷(目标产物)就会产生约3kg副产物(即废物)氯化钙 和水,同时,还存在使用有毒的氯气做原料,对设备要求较高,需要对产品分离提 纯等问题。为克服这些缺点,人们采用了一个新的方法:以银为催化剂,用氧气 直接氧化乙烯一步合成环氧乙烷,可使反应的原子利用率达到100%。           CH2CH2+/2O2C2H4O   反应物的质量/g  28 16 44   产物的质量/g 44   废物的质量/g    0 原子利用率


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