C6H6 + HOSO3H ⇒ C6H5-SO3H + H2O
solutia initiala de H2SO4 : msi = 200g ci= 98%⇒ mdi = 196g mH2O = 6g
reactioneaza : 1molH2SO4 (98g) ⇒ 1mol H2O (18g)
acidul rezidual : ms = 200 - 98 + 18 = 280g md = 196 - 98 = 98g
+ m(g)oleum(0,8m g H2SO4+0,2m gSO3-dincare⇒0,2m/80·98=0,245m gH2SO4
acid reutilizabil : msu = 280+ m mdu = 98 + 0,8m + 0,245m) cu = 98%
(98 + 1,045m )·100/(280+m) = 98
100 + 1,066m = 280+m 0,066m = 180 m = 2717,8 g