Abstract: The crush strength of dechlorination agent was influenced by dosage and type of binder, peptizer, extrusion aid, H2O/powder ratio, and amount of active component during preparation. The influence of different binders (polyvinyl alcohol, kaolin, and alumina sol), peptizers (nitric acid, hydrochloric acid, and acetic acid), and the extrusion aids (sesbania powder, citric acid, and oxalic acid) was tested, respectively. The results indicate that alumina sol, nitric acid and sebania powder are the most effective materials in improving the strength of the agent, their dosages are 50%, 5%, and 2.5%，respectively. The optimum ratios of H2O/powder and active component/carrier are 0.2~0.4ml/g and 1.11, respectively. With above proportions, the prepared dechlorination agent has the best strength of 150 N/cm.

Key words: dechlorination agent, molding conditions, crush strength