MIXED ALKALI METAL-MAGNESIUM SALT OF CROSSLINKED STARCH XANTHATE AND PROCESS OF PREPARATION

摘要

MIXED ALKALI METAL-MAGNESIUM SALT OF CROSSLINKEDSTARCH XANTHATE AND PROCESS OF PREPARATIONABSTRACTMixed alkali metal (sodium or potassium)-magnesium saltsof crosslinked starch xanthates are prepared by incorporating acritical amount of a water-soluble magnesium salt (e.g. magnesiumsulfate) in the reaction slurry prior to dewatering the xanthatedstarch. The rate of dewatering by filtration or centrifugationis accelerated, and the resulting product has improved propertiesfor use in removing heavy metal ions from aqueous solutions.