CH3-CH3+Cl2---光---CH3-CH2Cl+HCl,CH3-CH2Cl+NaOH--H2O加热---CH3CH2OH+NaCl,2CH3CH2OH+O2---Cu加热--2CH3CHO+2H2O,2CH3CHO+O2---Cu加热---2CH3COOH,CH3COONa---CaO加热---CH4,最后这个是教材上制甲烷的反应式缺点...