tinh bột>glucozo>X+cuo>Y>X>đietyl ete

$(C_{6}H_{5}O_{5})_{n}+nH_{2}O  \buildrel{{t^o,xt}}\over\longrightarrow nC_{6}H_{12}O_{6}$

$C_{6}H_{12}O_{6} \buildrel{{\text{men giấm}}}\over\longrightarrow 2C_{2}H_{5}OH+2CO_{2}$

$C_{2}H_{5}OH+CuO \buildrel{{t^o}}\over\longrightarrow CH_{3}CHO+Cu+H_{2}O$

$CH_{3}CHO+H_{2} \to C_{2}H_{5}OH$

$2C_{2}H_{5}OH  \buildrel{{H_{2}SO_{4}đ,140^oC}}\over\longrightarrow C_{2}H_{5}OC_{2}H_{5} +H_{2}O$