Lesson 2 Chemical principles and raw materials
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Lesson 2 Chemical principles and raw materials图片（共11张） :

        2.2.1 IsocyanatesAs a rule,isocyanates are obtained by the phosgenation of the corresponding primary amines(Fig.2-1).Fig. 2-1 Manufacture of isocyanates by phosgenation of primary aminesAlternatively,phosgene - free manufacturing processes have been devel......（本文共 32492 字, 11 张图）     [阅读本文] >>