Preparation of high-purity molten FLiNaK salt by the hydrofluorination process

被引：42

作者：

Zong, Guoqiang ^{[1
]}

Zhang, Zhi-Bing ^{[1
]}

Sun, Jia-Hong ^{[1
]}

Xiao, Ji-Chang ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Organ Chem, Key Lab Organofluorine Chem, 345 Lingling Rd, Shanghai 200032, Peoples R China

来源：

JOURNAL OF FLUORINE CHEMISTRY | 2017年 / 197卷

关键词：

FLiNaK; Hydrofluorination; High purity; Purification; Oxygen content; MO-CR ALLOY; NAF-KF SALT; CORROSION PERFORMANCE; NUCLEAR APPLICATIONS; WELD JOINT; TEMPERATURE; SUPERALLOY; BEHAVIOR;

D O I：

10.1016/j.jfluchem.2017.03.006

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The preparation conditions and purification reaction mechanism for H-2-HF treatment of molten FLiNaK salt were investigated. The optimal process conditions for preparation of high-purity molten FLiNaK salt were obtained. They are purification temperature of 650 degrees C, liquid height of 0.9 m, purification time of 48 h, flow ratio of H-2/HF = 10, flow volume magnitude of 800 mL/min, and reaction pressure of 0 MPa. The oxygen content of the prepared molten salt was around 80 ppm, corrosion impurity elements (Cr, Fe, and Ni) were less than 20 ppm, and the S and P contents were below 5 ppm. The quality of FLiNaK molten salt prepared by this hydrofluorination process is better than that obtained by adding NH4HF2 as a fluorinating reagent. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：134 / 141

页数：8

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