Process for scale inhibition for kraft digesters.

摘要

Inhibition of calcium scale under the extreme temperature conditions found in pulp digesters has been accomplished by employing certain mixtures of polyaminopoly(alkylenephosphonic acids) together with nonionic surfactants. Diethylenetriaminepenta(methylenephosphonic acid) together with a polyethoxynonylphenol has been found especially effective for the purpose.