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- sodium hydrogen fluoride 酸性氟化钠
- The system, made by Linde, splits hydrogen fluoride into fluorine. 这个系统,由林德集团制造,能将氟化氢分解成氟气。
- Conceal disturbing elements like iron,copper,lead with hydrogen fluoride amine-EDTA,add the potassium iodide to separate iodine, and take starch as indicator,titrate with sodium hyposulfite. 试样以王水分解、泡塑富集分离金,硫脲解脱,以硝酸-硫酸破坏硫脲,用氟化氢胺-EDTA掩蔽铁、铜、铅等干扰元素,加碘化钾使之析出碘,以淀粉为指示剂,用硫代硫酸钠进行滴定。
- Fluorine and hydrogen fluoride in a mixed gas, HF--F_2--Ar ahd F_2--HF--N_2,have been determined. 该仪器已用于HF-F_2-Ar和HF-F_2-N_2等混合气体中氟和氟化氢的测定。
- Experiment using HF-fumigation was conducted t o study effect of hydrogen fluoride on rubber tree saplings. 通过熏气模拟试验研究氟化氢气体对橡胶盆栽幼苗的影响。
- The condensation is effected by heating a suitable mixture of sodium hydrogen orthophosphates. 聚合可借加热正磷酸氢钠的适当混合物实现。
- Fujian Shaowu Yongfei Chemical Co., Ltd.- Hydrogen fluoride and fluoride salts manufacturer in China. 上海卓越纳米新材料股份有限公司-生产纳米活性碳酸钙。
- By using sodium hydrogen sulfate as the catalyst,benzyl alcohol and propionic acid reacted to form benzyl propionate. 选用乙醇和水作为溶剂 ,实现亚硫酸氢钠对异氰酸酯的良好封闭。
- Depending on conditions, hydrogen fluoride may convert to hydrofluoric acid (aqueous) at varying concentrations. 根据条件,氟化氢可以在多种浓度下转化成氢氟酸(水成的)。
- Using sodium hydrogen sulfate as the catalyst,butanic acid and benzyl alcohol reacted to form benzyl butyrate. 选用乙醇和水作为溶剂 ,实现亚硫酸氢钠对异氰酸酯的良好封闭。
- The glass is susceptible to long-term attack by high-alkalinity environments and HF( hydrogen fluoride), as well as to severe physical abrasion. 玻璃对高碱环境的长期攻击敏感,hf(氟化氢)产生严重的物理磨损。
- Sodium hydrogen carbonate should be added in portions and carefully, preventing overflow of the products from the beaker. 中和用碳酸氢钠要适量,每次加入量也不能太多否则会起泡沫溢出烧杯,造成不必要的损失。
- Perfluorotriethylamine is fabricated through electrochemical fluorination of triethylamine in anhydrous hydrogen fluoride under a certain condition. 本文通过对无水氟化氢和三乙胺的混合溶液在一定条件下的电解氟化,制备全氟三乙胺。
- The influences of sodium hexametaphosphate,sodium triphosphate and sodium hydrogen phosphate on the quality of quick-frozen dumplings were studied. 选用2种有代表性的面粉通过添加六偏磷酸钠、三聚磷酸钠和磷酸氢二钠3种磷酸盐制作速冻水饺。
- The physical and chemical properties of hydrogen fluoride differ from the other halogen hydride. Acidity of HF is related to condition or state. 氟化氢与其它卤化氢相比,有着独特的物理化学性质,它的酸性强弱与其所处的状态有关。
- The photolysis of NF3 in the stratosphere yields a fluorine radical that reacts fairly rapidly to form hydrogen fluoride (HF). 在同温层里NF3的光解作用氟原子团,氟原子团相当迅速地发生反应,生成氟化氢(HF)。
- These reagents are fluid , usually easily storable , transportable, they can replace hydrogen fluoride safely in some reactions. 在部分反应中可方便,安全地替代氟化氢作为氟化试剂。
- This paper briefly reviwed sodium hydrogen telluride (NaTeH), as a better nucleophilic reagent and reductive agent, being used widely in organic synthesis. 本文介绍了碲氢化钠作为一种优良还原剂及亲核试剂在有机合成中的主要作用。
- Fluorine resin is a paraffin-based molecular structure of thermoplastics, including all or part of hydrogen fluoride were replaced. 氟树脂是具有石蜡型分子结构的热塑性塑料,其中全部或部分氢被氟取代。
- Reaction of ketones with sodium diselenide and sodium hydrogen selenide under the catalysis of n-BuNH2 gave a moderate yield of diselenides in a "one-pot" fashion. 在正丁胺的催化下,酮与硒氢化钠、二硒化钠乙醇溶液通过“一锅”法反应得到了中等产率的二硒醚。