Study of the possible use of intermediate flax as rave material for production of cellulose

In treating intemediate flax with concentrated solutions (greater than 5M) of sodium hydroxide, crystalline regions of cellulose totally pass. from modification CI to modification CII, despite the presence: of contaminants (lignin, hemicellulose, etc.). The presence of hydrogen peroxide in basic solutions shifts the beginning of the CI -> CII phase transition toward higher concentrations of sodium hydroxide. A sufficiently high degree of purification of intermediate, flax (similar to 93% cellulose content) can be attained in two-step treatment including acid peroxide cooking in the first stage and alkaline cooking in the second stage and in alkaline-peroxide cooking.