1)  defluorination
脱氟法
2)  defluorination method of concentrated ground phosphate rock
磷精矿粉脱氟法
1.
The technology for production of feed-grade calcium hydrogen phosphate by defluorination method of concentrated ground phosphate rock are presented including principle of defluorination and production process.
利用磷精矿粉脱氟法生产饲料级磷酸氢钙,介绍其脱氟原理、生产工艺流程,按脱氟净化生产净化磷酸,萃取过滤生产粗磷酸,石灰乳中和过滤生产饲钙,分别说明其工艺控制指标,并与两段中和法对比,说明该方法生产饲钙的特点是P2O5回收率高,磷矿、硫酸、石灰乳消耗低。
3)  defluorination
脱氟
1.
Study on condition of defluorination in wet-process phosphoric acid production with precipitation method;
湿法磷酸化学沉淀法脱氟的研究
2.
Progress of Chemical Disposal Defluorination of Wet-Process Phosphoric Acid;
湿法磷酸化学法脱氟的研究进展
3.
Research on Single-step Defluorination in Wet-process Phosphoric Acid Production with Adsorption Precipitation Method;
湿法磷酸生产中吸附沉淀法一步脱氟净化的研究
4)  defluorinate
脱氟
1.
The quality of edible calcium hydrophosphate produced from the defluorinated water of calcium can meet with the National Standard GB 1889-92.
利用脱氟后的“钙水”生产食用级磷酸氢钙，质量符合ＧＢ１８８９—９２。
2.
In this thesis, the composition of phosphate rock、 the kind of defluorinate agent、the conditions of neutralization were studied in the industrial device of feed grade dicalcium phosphate in HongHe Chemical Ltd.
通过实验深入细致地研究了磷矿的组份变化、脱氟剂的选择、脱氟pH值、脱氟温度及脱氟时间等指标对脱氟液中磷氟比的影响，并对这些指标进行了优化。
5)  defluoridation
脱氟
6)  defluorination agent
脱氟剂
1.
A stepwise carbochlorination-oxidation process was developed for the rare earth extraction from mixed bastnaesitemonazite concentrate using carbon as reductant, chlorine gas as chlorination agent, SiCl4 gas as defluorination agent, and O2+H2O mixed gas as oxidant.
在脱氟剂SiCl4作用下,随着反应温度由500℃增至800℃,氟碳铈-独居石混合精矿稀土氯化率由92%增至99%,而无SiCl4时同样温度范围内,稀土氯化率为56%～88%,500℃氯化反应2h时主要产物为稀土氯化物、氯化钙;当氯化反应温度小于500℃时,与原料比钍的氯化产物挥发量小于1。
2.
A carbochlorination process of bastnaesite concentrate was investigated by using activated carbon powder as reductant,Cl_2 as chlorination agent and SiCl_4 as defluorination agent.
以活性炭为还原剂、Cl_2为氯化剂、SiCl_4为脱氟剂,研究氟碳铈矿的碳热氯化反应动力学。
3.
Carbochlorination reaction mechanism was investigated for extraction of rare earths from mixed bastnaesite-monazite concentrate with AlCl3 as defluorination agent.
研究了氟碳铈矿-独居石混合精矿经AlCl3脱氟和加碳氯化反应提取稀土的工艺及反应机理,考察了反应时间、温度和脱氟剂对稀土提取率的影响。
参考词条
补充资料：氟化脱重氮基反应
分子式：
CAS号：

性质：芳香族氟硼酸重氮盐加热分解脱掉重氮基生成芳香族氟化物的反应。Ar-N2BF4-Ar-F+N2+BFB。芳香族一级胺在氟硼酸(HBF4)存在下重氮化，一般可以得到较高产率的氟硼酸重氮盐，再经氟化脱重氮基反应，即得到芳香族氟化物，是在芳环上引入氟原子的重要方法。如果芳香胺芳环上还有羧基或羟基，则氟化物产率显著降低，这时可用六氟磷酸(HPF6)代替氟硼酸，例如在HPF6存在下邻氨基苯甲酸经重氮化得到六氟磷酸重氮盐，再加热分解，可以得到产率为78％的邻氟苯甲酸。

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