Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Treatment with particular chemical
Patent
1987-07-29
1989-01-24
Wax, Robert A.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Treatment with particular chemical
162 82, 210700, 252180, C02F 514
Patent
active
047999950
ABSTRACT:
Inhibition of calcium scale under the extreme temperature conditions found in pulp digesters has been accomplished by employing certain mixtures of polaminopoly(alkylenephosphonic acids) together with nonionic surfactants. Diethylenetriaminepenta(methylenephosphonic acid) together with a polyethoxynonylphenol has been found especially effective for the purpose.
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Cooper Lance A.
Crump Druce K.
Hopkins Thomas M.
Ancona A. Cooper
The Dow Chemical Company
Wax Robert A.
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