1、第一步:粗盐中常见的杂质有沉淀、氯化镁、氯化钙、硫酸盐等。粗盐中常见的杂质可分为转,由不溶性蜀杂质(沉淀物)和溶性杂质(氯化镁、氯化钙、硫酸盐等)组成。当粗盐中的杂质被清除后,粗盐就被提纯了。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/562c11dfa9ec8a13d0bf059fe703918fa0ecc02c?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
2、第二步:首先,将粗盐过滤,去除粗盐中不溶性杂质,加入过量的氯化钡,除去硫酸钠,因为加入过量的氯化钡,引入氯化钡杂质。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/6a600c338744ebf8ced43640c9f9d72a6059a72c?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
3、第三步:加入多余的氢氧化钠以去除氯化镁。由于过量的氢氧化钠引入了杂质。用过量的碳酸钠去除氯化钙和氯化钡,并引入碳酸钠杂质
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/242dd42a2834349bdea33cfad9ea15ce36d3be2c?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
4、第四步:然后加入过量的盐酸除去剩余的氢氧化钠和碳酸钠,最后一步是巨大的蒸发结晶。等待。完成了。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/0df431adcbef7609b6aecbe03edda3cc7cd99e2c?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)