在海带综合利用提取甘露醇(C_6H_(14)O_5)过程中,用蒸发晶析脱出无机盐法净化甘露醇溶液时得到含甘露醇10～14％,氯化钾约45％,氯化钠约40％的混合盐。如能从这种混合盐中分离甘露醇,氯化钾等,不仅可以提高甘露醇的收率,而且可以回收相当数量的钾盐,提高海带的利用率。与上述分离过程有关的C_6H_(14)O_6—KCl—NaCl In the comprehensive utilization of kelp mannitol (C_6H_ (14) O_5), by evaporation of inorganic salt out of mannitol purification method to obtain mannitol containing 10 to 14%, about 45% potassium chloride, sodium chloride about 40% mixed salt. If mannitol, potassium chloride, etc. can be separated from this mixed salt, not only the yield of mannitol can be increased, but also a considerable amount of potassium salt can be recovered and the utilization rate of kelp can be increased. C_6H_ (14) O_6-KCl-NaCl related to the above separation process