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NMR作为一种物理化学方法,已在化学学科的各个领域发挥了卓有成效的作用。但迄今为止,NMR在相图研究中的应用未见报道。由于相图在化学热力学及化工生产中的重要性,人们对其研究十分重视.如二盐-水体系的相图对于选择适宜条件以便从混合体系中提取纯盐可提供必要和充分的科学依据,并在无机化工中得到广泛的应用。研究多组份盐水相图已有许多经典的方法.本文首次将~(23)Na、~(14)N的NMR定量方法用于研究NaCl-NH_4Cl-H_2O三组份相图,是开拓多核NMR在相图研究中应用的一种尝试。
NMR, as a physicochemical method, has played a fruitful role in all fields of chemistry. However, so far, the application of NMR in phase diagram has not been reported. Due to the importance of the phase diagram in chemical thermodynamics and chemical production, much attention has been paid to its research, such as the phase diagram of the di-salt system, which provides the necessary and sufficient scientific evidence for the selection of suitable conditions for the extraction of pure salts from the mixed system , And is widely used in inorganic chemicals. There are many classical methods to study multicomponent brine phase diagram.In this paper, the first quantitative NMR method of ~ (23) Na and ~ (14) N is used to study the phase diagram of NaCl-NH_4Cl-H_2O. An attempt at phase diagram research.