C2h5oh > h2c=> ch3-> ch3-ch2-cl

С2Н5ОН---> Н2С=СН2 = Н2О

Н2С=СН2 +Н2---> CН3-СН3

СН3-СН3 + Сl2-->СН3-СН2-Сl +НСl

                Al2O3

C2H5OH >CH2=CH2+H2O

                           Ni

H2C=CH2+H2>CH3-CH3

CH3-CH3+СІ2> CH3-CH2-Cl+НСІ