Internal sizing with black liquid

Details Internal sizing with black liquid Internal sizing with black liquid

1983-12-08

1985-05-14

Chin, Peter

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With non-fiber material added to product

162 16, 162180, 162189, D21D 300

Patent

active

045170525

ABSTRACT:
A portion of the spent cooking liquor from a pulping process is diverted from the washing step directly to the machine chest of a paper machine for pre-sizing the paper made on the paper machine. The preferred pulping process is an unbleached kraft or sulfate process and the preferred raw material for the pulping process is pine or softwood chips. Moreover, the preferred point in the washing step for diverting the black liquor is near or at the final washing stage.

REFERENCES:
patent: 931608 (1909-08-01), Hough
patent: 1231153 (1917-06-01), Haeffner
patent: 1873056 (1932-08-01), Smith et al.
patent: 2260557 (1941-10-01), Burton
patent: 2360779 (1944-10-01), Lang et al.
patent: 3180787 (1965-04-01), Adams
patent: 3236720 (1966-02-01), Tousignant et al.
patent: 3305435 (1967-02-01), Williston et al.
patent: 3454970 (1969-07-01), Sutherland
patent: 3567574 (1971-03-01), Braitberg et al.

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