Process and apparatus for producing pulp

Details Process and apparatus for producing pulp Process and apparatus for producing pulp

D - Textiles, Paper

21

C

92/57

D21C 7/00 (2006.01) B30B 9/04 (2006.01) B30B 9/12 (2006.01) D21C 3/22 (2006.01)

Patent

CA 1180927

PROCESS AND APPARATUS FOR PRODUCING PULP ABSTRACT OF THE DISCLOSURE A process and apparatus for producing pulp from impregnated cellulose-containing starting materials such as wood, straw, grass, waste materials etc. in a compacting apparatus comprising a shell (1) and two mutually opposite pistons (4, 4') contained in said shell. The material to be compacted is disposed between said pistons and constitutes a resistive electrical load. The pistons are movable relative to each other and the shell is movable relative to the pistons. The impregnated starting materi- als are digested at a relatively low hydromodulus of 0.5 to 2 with a direct action of heat on the impregnated starting materials in the compacting apparatus at a digesting temperature of 160 to 300°C. The digesting times are short and depend on the digesting temperature.

390542

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