METHOD TO PRODUCE CELLULOSE FOR SANITARY-HYGIENE TYPES OF PAPER Russian patent published in 2013 - IPC D21C3/06 D21C9/08 

FIELD: textile, paper.

SUBSTANCE: method to produce cellulose for sanitary-hygiene types of paper is realised by means of wood chips boiling with a sulfite solution in presence of a mixture of anion, non-ionogenic and amphoterous surfactants, and also a salt or salts from a group including phosphates and carbonates of sodium, disilicate and sodium sulfate. Mixture consumption is 0.3-1.5 kg per 1 t of absolutely dry chips.

EFFECT: reduction of resin and oil content in cellulose, level of contamination of paper machine elements with resin particles, higher mechanical strength of cellulose at its lower stiffness, increased absorption ability.

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