硫酸铵-碘化钾-溴化十六烷基吡啶体系浮选分离铅

研究了硫酸铵 碘化钾 溴化十六烷基吡啶体系浮选分离铅的行为及其与常见离子的分离条件。实验表明 :Pb2 + 与I- 形成的PbI2 -4能与溴化十六烷基吡啶 (CPB+ )形成浮于盐水相上层且不溶于水的三元缔合物 (PbI2 -4)·(CPB+ ) 2 。当碘化钾 (0 .5 0mol L)和CPB+ (1.0× 10 - 2 mol L)溶液的用量分别为 1.5 0mL和 2 .0 0mL时 ,Pb 可被完全浮选 ,控制pH =4 .0 ,该浮选体系能使Pb 与Zn 、Fe(Ⅲ )、Co 、Ni 、Mn 、Al(Ⅲ )等常见离子分离     

硝酸钠-碘化钾-氯化十六烷基吡啶体系浮选分离铅(Ⅱ)的研究

研究了硝酸钠－碘化钾－氯化十六烷基吡啶体系浮选分离铅（Ⅱ）的行为及其与常见离子分离的条件。结果表明，控制PH5．0，在1．0gNaNO3存在下，当0.1mol.L^-1碘化钾和0.01mol.L^-1氯化十六烷基吡啶溶液的用量均为1.0ml时，铅（Ⅱ）被定量浮选而与Fe^2 ,Co^2 ,Ni^2 ,Zn^2 ,Mn^2 ,Al^3 等离子分离，对合成水样进行了定量浮选分离测定，结果满意。     

硝酸钠-碘化钾-氯化十六烷基吡啶-水体系浮选分离汞(Ⅱ)的研究

研究了硝酸钠 碘化钾 氯化十六烷基吡啶 水体系浮选分离汞 (Ⅱ )的行为及其与常见离子分离的条件。控制pH 4 .0 ,在硝酸钠存在下 ,Hg(Ⅱ )可被碘化钾 氯化十六烷基吡啶 水体系浮选 ,而Zn(Ⅱ )、Ni(Ⅱ )、Co(Ⅱ )、Mn(Ⅱ )、Fe(Ⅱ)、Al(Ⅱ )等离子在该体系中不被浮选 ,从而实现了Hg(Ⅱ )与这些常见离子之间的定量分离     

硫氰酸钾-氯化十六烷基吡啶-水体系浮选分离钛

研究了氯化十六烷基吡啶和KSCN分离钛的行为及与一些金属离子分离的条件。结果表明,在水溶液中,Ti4+与氯化十六烷基吡啶和KSCN形成不溶于水的三元缔合物[Ti(SCN)62-][CPC+]2,此三元缔合物沉淀浮于水相上层形成界面清晰的液-固两相。当溶液中氯化十六烷基吡啶和KSCN的浓度分别为8.0×10-4mol/L和6.0×10-2 mol/L时,Ti4+可与V5+、Mg2+、Al3+、Cd2+、Mn2+、Ga3+、Fe2+、Ni2+和Cr3+进行分离,该方法在微量Ti的分离和富集分析中有一定的实用价值。     

硝酸钠存在下碘化钾-氯化十六烷基吡啶液-固浮选分离铜(Ⅱ)

研究了硝酸钠存在下磺化钾—氯化十六烷基吡啶液—固浮选分离Cu2 的行为及其与常见离子分离的条件。实验表明：在硝酸钠存在下，控制pH4．0，Cu2 与In形成的CuI沉淀能被氯化十六烷基吡啶(CPC)浮选，而Zn2 、Co2 、Mn2 、Ni2 、Fe2 、Al3 等不被浮选，据此实现了Cu2 与这些离子之间的定量分离。对合成水样及人发试样中微量铜进行了定量浮选分离测定，结果与原子吸收法相符。样品标准加入回收串为103．2％—104．2％;RSD为1．8％—2．8％。     

溴化十六烷基吡啶-碘化钾-硫酸铵液-固浮选分离镉(Ⅱ)

Cd（Ⅱ）是一种危险的环境污染物质,是对人体健康、动物生长均有危害作用的毒性重金属,对Cd（Ⅱ）的分离富集方法的研究一直受到化学工作者的重视。盐-三元缔合物-水体系不仅具有非有机溶剂液-固萃取体系的优点,而且还具有分相速度快、相分离界面清晰、操作简便等特点,已引起了化学工作者的重视。     

用硫酸铵-碘化钾-结晶紫体系浮选分离镉

研究了硫酸铵－碘化钾－结晶紫体系浮选分离镉的行为及其与常见离子分离的条件,该体系能使Cd(Ⅱ）与常见离子Zn(Ⅱ）、Fe（Ⅲ）、Co(Ⅱ）、Ni(Ⅱ）、Mn(Ⅱ）、Al（Ⅲ）分离。     

氯化钠-硫氰酸铵-十六烷基氯化吡啶鎓-水体系浮选分离锌(Ⅱ)

氯化钠-硫氰酸铵-十六烷基氯化吡啶鎓-水体系浮选分离锌(Ⅱ)     

氯化钠-硫氰酸铵-十六烷基氯化吡啶鎓-水体系浮选分离锌(Ⅱ)

氯化钠-硫氰酸铵-十六烷基氯化吡啶鎓-水体系浮选分离锌(Ⅱ)     

硝酸铵-碘化物-溴化十六烷基吡啶浮选分离镉新体系的研究

研究了NH4NO3-碘化物-溴化十六烷基吡啶体系浮选分离镉的行为及其与常见金属离子分离的条件。实验表明,控制一定的酸度(pH1~6),该体系能使Cd(Ⅱ)与Fe(Ⅱ)、Co(Ⅱ)、Ni(Ⅱ)、Mn(Ⅱ)、Zn(Ⅱ)等常见离子分离。     

Study on the Liquid‐Solid Flotation Separation of Cadmium by Ammonium Sulfate‐Potassium Iodide‐Cetylpyridine Chloride‐Water System

The liquid‐solid flotation separation behaviors of Cd²⁺ in ammonium sulfate‐potassium iodide‐cetylpyridine chloride‐water system and the conditions for the separation of Cd²⁺ from other metal ions were studied. The results showed that in the presence of 1.0 g (NH₄)₂SO₄ and when the dosage of 0.1 M potassium iodide was 2.0 mL and 0.01 M cetylpyridine chloride (CPC) solution was 1.0 mL respectively, the formed water‐insoluble ternary association complex of KI‐CPC‐Cd floated above water phase and liquid‐solid phases were formed with clear interface. In this condition, Zn²⁺, Mn²⁺, Fe²⁺, Co²⁺, Ni²⁺ and Al³⁺ could not be floated and Cd²⁺ was floated quantitatively at pH 5.0. Therefore, the quantitative separation of Cd²⁺ from the above metal ions could be achieved. The quantitative flotation separation determination of Cd²⁺ in the sample of synthetic water and industrial waster water was performed, and the results agreed well with those by AAS method. The recoveries were 97.2%～102.4%, and the RSD was 1.8%.     

Flotation Separation of Lead with Sodium Nitrate‐Potassium Iodide‐Cetyltrimethyl Ammonium Bromide System

The flotation separation behavior of lead with Sodium Nitrate‐Potassium Iodide‐Cetyltrimethyl Ammonium Bromide system and the conditions for the separation of lead with other metal ions are studied in this research. With 0.1 M potassium iodide, 1.0 × 10^?2 M Cetyltrimethyl Ammonium Bromide and 1.0 g/10 mL of sodium nitrate, Pb(II) can form an ion‐association complex (PbI₄^2?) (CTMAB⁺)₂ and be separated completely from Zn(II), Fe(III), Co(II), Ni(II), Mn(II) and Al(III) by flotation at pH = 1.0–3.0.     

硝酸钠-碘化钾/孔雀绿-水体系浮选分离镉

硝酸钠-碘化钾/孔雀绿-水体系浮选分离镉     

Study on Spectrophotometric Method for Determination of Bismuth after Flotation Separation Using Microcrystalline Adsorption System

The paper presents a novel method for the flotation separation of Bi³⁺ using microcrystalline adsorption system prior to the determination by spectrophotometry. The effects of different parameters, such as the dosages of KI and dodecyl trimethyl ammonium bromide (DTMAB), various salts and acidity etc. on the flotation yield of Bi³⁺ have been investigated to select the optimum experimental conditions. The possible flotation separation mechanism of Bi³⁺ was discussed. The results showed that under the optimum conditions, dodecyl trimethyl ammonium bromide cation (DTMAB⁺ ) reacted with I^? to produce themicrocrystalline matter (Ms‐M) of (DTMAB⁺·I^?), the water‐insoluble ternary association complex of (DTMAB)₃[BiI₆] which produced by Bi³⁺ and I^?, DTMAB⁺ was quantificationally adsorbed on the surface of Ms‐M of (DTMAB⁺·I^?) and was floated above water phase, the liquid‐solid phases were formed with clear interface. In this condition, K⁺, Na⁺, Ca²⁺, Mg²⁺, Co²⁺, Ni²⁺, Mn²⁺, Zn²⁺, Fe²⁺ and Al³⁺ could not be floated. Therefore, Bi³⁺ was separated completely from the above metal ions. A new method for flotation separation and determination of bismuth using microcrystalline adsorption system was established. The proposed method has been successfully applied to the determination of Bi³⁺ in bismuthiferous drug samples, and the results agreed well with those obtained by pharmacopoeia method. The recoveries were 94.1%～106.8%, and the RSD was 1.5%～2.3%.     

Separation of Mercury with an Ammonium Sulfate‐Ammonium Thiocyanate‐Ethyl Violet Flotation System

The separation behavior of mercury by a flotation system consisting of ammonium sulfate, ammonium thiocyanate and ethyl violet, and the conditions for the separation of Hg(II) with other common metal ions have been studied. The studies show that in aqueous solutions, Hg(II) combines with NH₄SCN and ethyl violet(EV) into dissoluble ternary ion‐association complex [Hg(SCN)4^2?]?(EV)₂. In the presence of ammonium sulfate, the precipitate is floats well on the surface of the water phase and separates from water thoroughly. It shows that Hg(II) can be separated completely from Cd(II), Fe(II), Co(II), Ni(II), Mn(II) and Al(III) by flotation at pH1.0. The flotation mechanism of Hg(II) is described in this paper.     

硫酸铵存在下碘化物—结晶紫—丙醇体系萃取分离镉

研究了硫酸铵存在下，碘化物－结晶紫－丙醇体系萃取镉的行为以及丙醇水溶液的分相条件，试验表明，丙醇作为萃取溶剂，能萃取中性离子缔合物，调节溶液ｐＨ＝１．０或ｐＨ＝４．０，该体系使能Ｃｄ＾２＋，从常见过渡元素Ｆｅ＾３＋，Ｃｏ＾２＋，Ｎｉ＾２＋，Ｍｎ＾２＋，Ｚｎ＾２＋，Ｃｒ＾３＋的混合液中分离出来。     

硫酸铵-碘化钾-乙基紫体系浮选分离Pb(Ⅱ)

铅;硫酸铵-碘化钾-乙基紫体系浮选分离Pb(Ⅱ)