KINETICS OF XANTHOGENATION AFTER HIGH-TEMPERATURE MERCERIZATION

With the increase of the mercerization temperature of the cellulose in the process of viscose production from 20 to 105-degrees-C, the quality of the obtained viscose goes through a minimum at 70-degrees-C, while 105-degrees-C is the most advantageous temperature. The kinetics of xanthogenation after mercerization at the three indicated temperatures has been investigated. It is established that the kinetic characteristics of the xanthogenation are improved in the same order of temperatures of the preliminary mercerization. This shows that the advantageous effect of the high-temperature mercerization on the quality of the viscose is in direct connection with the favourable effect of the mercerization on the xanthogenation.