$2CH_4\buildrel{{1500^oC, \text{lln}}}\over\longrightarrow C_2H_2+3H_2$
$C_2H_2+H_2\buildrel{{Pd/PbCO_3, t^o}}\over\longrightarrow C_2H_4$
$C_2H_4+H_2O\buildrel{{H^+, t^o}}\over\longrightarrow C_2H_5OH$ (rượu etylic)
$C_2H_5OH+O_2\buildrel{{\text{men giấm}}}\over\longrightarrow CH_3COOH$ (axit axetic) $+H_2O$
$nCH_2=CH_2\buildrel{{t^o, p, xt}}\over\longrightarrow (-CH_2-CH_2-)_n$ (polietilen)
$CH_3COOH+C_2H_5OH\buildrel{{t^o, H_2SO_4}}\over\rightleftharpoons CH_3COOC_2H_5$ (etyl axetat) $+H_2O$
$C_2H_4+HCl\to C_2H_5Cl$ (etyl clorua)
$C_2H_4+H_2\buildrel{{Ni, t^o}}\over\longrightarrow C_2H_6$ (etan)