Reaction in liquid phase dc S 7 dt (5-6) let t=O, Cs=Cso; t=t,, CS=CS S05 After integration of isolated variable obtain cs d 5-7) The conversion rate is expressed by X then comes out:Reaction in liquid phase (5-6) let After integration of isolated variable， obtain (5-7) The conversion rate is expressed by , then comes out： = − s s o C C s s r r dC t dt dC r S s = − 0, ; , , S S 0 r CS CS0 t = C = C t = t = Xs