| 摘要 |
PURPOSE:To improve dehydration efficiency by using the nonionic surfactant expressed by R-O-(AO)n-H in a filtration and dehydration stage for water slurry of metallic hydroxides. CONSTITUTION:A titled improving agent for filtration and dehydration properties consisting of the nonionic surfactant expressed by R-O-(AO)n-H wherein R is 4- 24C alkyl groups, alkenyl groups, alkyl aryl groups having 8-20C alkyl groups, distyrenated phenyl groups or dibenzylated phenyl groups, A is 2-4C satd. alkylene groups, and (n) is 1-100. When said improving agent is added to water slurry of metallic hydroxides which are insoluble in water or hardly soluble in water, dehydration efficiency is improved. |
