Soaking in caustic soda
In this
process the wood pulp is soaked in sodium hydroxide to produce soda cellulose
which is squeezed to remove the extra caustic soda solution .
Shredding
The crumbs
of soda cellulose are shredded to produce small flakes.
Ageing
In this
process, the shredded soda cellulose is aged for a certain time to adjust the
molecular structure.
Xanthating
The aged
cellulose is mixed with carbon disulphide to produce by chemical reaction
xanthate
Dissolving
The xanthat
is dissolved in sodium hydroxide to produce xanthate solution for spinning.
De-aeration and filtration
In this
process, the xanthate solution is stored in tanks under vacuum to remove any
air bubbles, and is passed through multi stage filters to remove any trash
particles, and when
