Process of preventing formation of resinous deposits in the manu

Details Process of preventing formation of resinous deposits in the manu Process of preventing formation of resinous deposits in the manu

1975-02-21

1977-03-01

Bashore, S. Leon

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

162 80, 162158, 162181R, 162181A, 162DIG4, D21H 302

Patent

active

040100677

ABSTRACT:
The difficulties encountered in the manufacture of paper, cardboard, and other cellulosic articles, as they are caused by the formation of resinous or pitch deposits on the paper as well as on the paper machines and processing apparatus, are overcome or at least considerably reduced, by the addition of phosphonic acids and more particularly of alkyl, amino or hydroxy alkyl, or cycloalkyl phosphonic acids or their alkali metal salts and of orthophosphoric acid or its alkali metal salts and/or of polyphosphoric acids. If required, amino polycarboxylic acids, hydroxy carboxylic acids, or their alkali metal salts, or alkali metal polyphosphates are also added during processing.

REFERENCES:
patent: 3234124 (1966-02-01), Irani
patent: 3639645 (1972-02-01), Miller et al.
patent: 3751372 (1973-08-01), Zecher
patent: 3784469 (1974-01-01), Krueger et al.
patent: 3804770 (1974-04-01), Lorenc et al.
patent: 3832393 (1974-08-01), Krueger
patent: 3832396 (1974-08-01), Irani et al.
patent: 3837803 (1974-09-01), Carter et al.
patent: 3896046 (1975-07-01), Carstens et al.
Tappi, vol. 47, No. 1, Jan. 1964, pp. 198A-201A.
Tappi, vol. 39, No. 10, Oct. 1956, pp. 684-690.

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