Monochlorobenzene (M) is produced commercially by the direct catalytic chlorination of benzene (B) at 40°C and 120 kPa absolute. In the process, dichlorobenzene (D) is generated as a co-product: 

Liquid and gas streams leave the reactor. The liquid contains 49.2 wt% M, 29.6% D, and the remainder unreacted B. The gas, which is sent to a treatment facility, contains 92%(v/v) HCl and 8% unreacted chlorine. Assume ideal-gas behavior. 

(a) What volume of gas leaves the reactor (m³/kg B fed)? 

(b) The pipe through which the gas is to flow is sized so that the gas velocity is no greater than 10 m/s. Derive an expression relating pipe diameter d_p (cm) to benzene feed rate ṁ_B0 (kg B/min). 

(c) In 2004, the demand for monochlorobenzene was projected to increase by 6%/year through the year 2007. What factors were contributing to the increased demand when the projection was made?

Transcribed Image Text:

C,H6 + Cl, → C,H;Cl + HCI C6H5CI+ C2 C6H4Cl2 + HCI