A Study of the Influence of Temperature on Bleaching Process of the De-Inked Waste Paper Pulp using Hydrogen Peroxide

This research aims to study temperature influence on the bleaching process of the de-inked waste paper pulp using hydrogen peroxide as a bleaching agent, and that will be through evaluating how pulp brightness changes within a range of studied temperatures. This research also studies the kinetics of the bleaching reaction at each studied temperature.The experiments were conducted using a laboratory pulper designed to simulate the industrial pulpers, but also modified to meet goals and conditions of the research.The results show that brightness increases as temperature increases, and an optimum temperature for bleaching process at research conditions was determined. The results also show that lower temperatures of the studied range result in relatively low brightness levels, while higher temperatures increase thermal decomposition of hydrogen peroxide, what effects negatively on bleaching process efficiency. Keywords: Bleaching, Temperature, Brightness, Hydrogen peroxid