USE OF IMINODISUCCINIC ACID SALT

PROBLEM TO BE SOLVED: To develop an easily bio-degradable chelating agent that has no eco-toxicological insufficiency, for example, iminodisuccinic acid, and increase the luminance and the brightness of vegetable fiber used in the paper making. SOLUTION: In the method for making paper that contains...

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Bibliographische Detailangaben
Hauptverfasser:	JOENTGEN WINFRIED DR, GROTH TORSTEN DR, ROICK THOMAS DR, WAGNER PAUL, DOEBERT FRANK, WENDEROTH ECKHARD
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMISTRY IMPREGNATING OR COATING OF PAPER METALLURGY ORGANIC CHEMISTRY PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRODUCTION OF CELLULOSE PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS PULP COMPOSITIONS REGENERATION OF PULPING LIQUORS TEXTILES TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To develop an easily bio-degradable chelating agent that has no eco-toxicological insufficiency, for example, iminodisuccinic acid, and increase the luminance and the brightness of vegetable fiber used in the paper making. SOLUTION: In the method for making paper that contains the process step for treating fiber-including thermo-mechanically treated pulp, the iminodisuccinic acid alkali salt is added to the pulp for bleaching. In a prefferred embodiment, the iminodisuccinic acid alkali metal salt is used in the pre-treatment of the fiber. In another prefferred embodiment, the iminodisuccinic acid alkali salt is used for the reductive or oxidative bleaching of the fiber. COPYRIGHT: (C)2008,JPO&INPIT