公开(公告)号：US3895996A

公开(公告)日：1975-07-22

申请号：US37288973

申请日：1973-06-22

Applicant: BETZ LABORATORIES

Inventor： LANGE K ROBERT ,  STERN ARTHUR M ,  GASNER LAWRENCE L ,  HSU YUAN TSUN

IPC: C02F5/10 ,  D21C11/00 ,  C07G1/00

CPC classification number: C02F5/10

Abstract: The present disclosure is directed primarily to a method of producing valuable products from aqueous solutions of lignin and lignin derivatives. Aqueous solutions of the lignin and derivatives thereof are available as commercial solutions, can be made from solids or semi-solid mixtures thereof or are available as waste effluents from pulp producing mills. With respect to the latter source, the inventive method not only permits the obtention of valuable products therefrom, but also reduces the amount of non-biodegradable and toxic materials normally contained therein to be eliminated prior to discharge. In addition, the method reduces the color of the final discharge. Basically, the method entails the addition to the lignin or lignin derivative solution of a polyvalent metal salt, the cation of which will react with a portion of the lignin solution to produce a water-insoluble precipitate, acidification of the precipitate and final treatment with a basic solution. The final products possess utilities as scale and precipitate agents for aqueous systems, namely steam producing and cooling water systems.

Abstract translation: 本公开主要涉及从木质素和木质素衍生物的水溶液中生产有价值的产物的方法。 木质素及其衍生物的水溶液可作为商业溶液获得，可以由其固体或半固体混合物制备，或作为废纸浆从纸浆生产厂获得。