| 摘要 |
A process for producing cumene and/or diisopropylbenzene which comprises, in combination,… (I) an alkylating step,… (II) a transalkylating step,… (III) a catalyst separating step,… (IV) a neutralization step, and… (V) a fractional distillation step; wherein the amount of by-product is reduced by… (a) carrying out step (I) at a temperature of 40 DEG C to 85 DEG C while maintaining the activity coefficient (M) of the catalyst at 10 x 10<-><4> to 300 x 10<-><4> and the concentration of aluminum chloride in the system at 0.005 to 0.15 mole/liter, and… (b) carrying out step (II) without removing the catalyst from the reaction product of step (I) and at a temperature of 40 DEG C to 75 DEG C in the presence of added fresh aluminum chloride in an amount of 2 to 20 parts by weight/hr per 1000 parts by weight/hr of diisopropylbenzene in the reaction system while maintaining the activity coefficient (M) of the catalyst in the system at 30 x 10<-><4> to 300 x 10<-><4> and the concentration of aluminum chloride in the system at 0.3 to 1 mole/liter. |
