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氨碱法制备纯碱的工艺流程

2025-04-07 04:00:12

推荐回答（2个）

回答（1）：

精制盐（NaCl）制成饱和溶液，
通入氨气达到饱和
再通入二氧化碳
继续同时通入NH3和CO2
析出大量沉淀后过滤，得到NaHCO3
灼烧NaHCO3得到Na2CO3

回答（2）：

根据题中所给生成物进行分析，要制备饱和氨水肯定是将氨水通入食盐水中，由饱和的氨水食盐溶液制备碳酸氢钠，根据物质的性质和元素守恒知应通入二氧化碳气体；碳酸氢钠受热易分解变为碳酸钠．
故答案为：①NH3 ②CO2 ③加热

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