Inorganic Chemicals Industry >
Study on mechanism and conditions of the new process of ammonium chloride conversion
Received date: 2020-09-17
Online published: 2021-03-11
Aiming at the problem of excess capacity of ammonium chloride in soda industry,a new way of conversion of ammonium chloride was put forward.Solid ammonium chloride and magnesium carbonate were used as raw materials to produce magnesium chloride,ammonia,carbon dioxide and water by solid-state heating reaction.Ammonia and carbon dioxide can be recycled using for soda production.The reaction mechanism of solid ammonium chloride and magnesium carbonate was investigated from the thermodynamics,and the effects of reaction temperature,reaction time and ratio of ingredients on the conversion of ammonium chloride were discussed.The orthogonal experiment was carried out to determine the optimal reaction conditions,the products were characterized by XRD,SEM and EDS.The results show that the optimum reaction conditions were as follows：the amount-of-substance ratio of magnesium carbonate and ammonium chloride was 1.8∶2.0,the temperature was 523 K and the reaction time was 120 min.Under the conditions,the conversion ratio of ammonium chloride can reach 94.40% and the purity of magnesium chloride can reach the industrial standard.
Key words： soda ash; ammonium chloride; magnesium chloride; reaction mechanism; thermodynamics
Fei Li , Jianmin Zhou , Chengyu Li , Wentao Xu , Xinyue Zhang , Xinwei Li , Jun Wang , Zhiyong Ji , Yingying Zhao , Xiaofu Guo , Junsheng Yuan . Study on mechanism and conditions of the new process of ammonium chloride conversion[J]. Inorganic Chemicals Industry, 2021 , 53(3) : 48 -53 . DOI: 10.11962/1006-4990.2020-0216
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