Indian Journal of Chemical Technology, Vol.8, No.5, 413-416, 2001
Recycling of hydrocarbon from textile printing
In India and in many developing countries hydrocarbons are still being used for pigment printing. In India, over 136 million litres of kerosene/mineral turpentine or solvent naphtha are used in pigment printing and also in reactive colour printing. After printing, the hydrocarbons vapours from the fabric is evaporated to the atmosphere during drying and curing. Due to inherent risk of explosion at the printing machine dryer, more air is pumped into the printing machine dryer to maintain the hydrocarbon vapour level below 0.5%. Thus the conventional vapour recovery systems are not suited for the recovery of this thin vapour. After several years of R&D activities for the first time in India, a hydrocarbon vapour recovery plant for textile printing has been developed. Subsequently, the plant has been setup and is been in continuous operation in a printing unit near Mumbai. The recovery efficiency is above 70%. This results in minimising air pollution and to save hydrocarbon which otherwise would have gone to the atmosphere. The recovered hydrocarbon is reused for printing.