AGENT FOR PREVENTING DEPOSITION OF SCALE IN PULP DIGESTER AND SCALE DEPOSITION PREVENTING METHOD

摘要

PURPOSE: To provide an agent and process for continuously preventing the deposition of scale in a digester and peripheral pipings, equipments, etc., of a kraft pulp production process of paper and pulp industry. ;CONSTITUTION: The objective scale deposition preventing agent contains, as an active component, a copolymer containing itaconic acid component and maleic acid component and having an itaconic acid content of 10-90mol% and a polymerization degree of 8-250. The scale deposition preventing agent is added in an amount of 0.01-10ppm based on 1ppm of calcium ion existing in the cooking liquor in a digester of a kraft pulp production process.;COPYRIGHT: (C)1993,JPO&Japio