Commrcial, Chemical & Development Co.

Shenoy nagar, Chennai, Tamil Nadu

phosphorus trichloride is reacted with oxygen or air in batch reactors. About 500 tons per month can be produced in 3 reactors aggregating to 34 M3 volume. In a continuous process with a radical change inreactor design the reacting volume was only 0.5 M3 and it is possible to produce 700 tons per month. The productivity goes up by a factor of 95. It also results in only 5% excess oxygen consumption compared about 15-25% excess by batch process.

Used for low concentration of VOC typically 0.5%. Requires large number of beds. It is batch process requiring switching of streams form bed to bed. Periodic replacement of activated carbon. Large volumes of organics are kept in process presenting a safety hazard Periodic regeneration of beds with steam or inert air. Large installation cost. Requires condensation of outlet gases.

Keeping with the idea that chemical industries can be environment friendly and yet be able to deliver profitability through process innovation and optimum resource utilisation, CCDC has developed a VOC recovery system.