Complexing agent for pulp and pulp bleaching, paper production and deinking of waste paper

摘要

Ethylene diamine disuccinic acid, ethylene diamine diglutaric acid, hydroxypropylene diamine disuccinic acid, their alkaline metal salts or ammonium salts and mixtures of said compounds are used as complexing agents for alkaline earth metal ions and heavy metal ions during cellulose and wood bleaching, paper production and used paper deinking.