In the first 5 hours of leaching, the impure mineral consumed most of free sodium cyanide of the liquor, in that case, the rate of gold leaching is low.

When determine free sodium cyanide in cyanide solution, a positive deviation presents markedly due to dissociation of part complex ions of zinc and copper.

银量法测氰化液中游离氰化钠时铜锌络离子的部分解离造成显著的正偏差。

The concentration of free cyanide is one of the main control indices for gold extraction liquid of cyanidation. Electrode poisoning is the main difficulty in free cyanide monitoring of cyanidation liguid with silver ion selective electrode. The poisoning ion is determined by electron probe analysis.

游离氰浓度是氰化提金液的主要控制指标之一.用银离子选择电极监测金矿氰化液的游离氰其主要困难在于电极中毒.通过电子探针分析确定了中毒离子；

Error Analysis and Concentration control of Free Cyanide in Copper Plating Bath

氰化镀铜液中游离氰化钠的分析误差和含量控制

The Device of WY-ⅱ Type Cyanide Monitor and Its Applications

WY－Ⅱ型微机化测氰仪的研制与应用

Application of Cooperation of Conducting Compressed Air and Adding Calcium Peroxide in Gold Cyanide Leaching

压缩空气加过氧化钙在金氰化中的协同作用

Application of Calcium Peroxide to Gold Cyanide Leaching

过氧化钙在氰化浸金中的作用

The recovered sodium cyanide and sodium cuprous cyanide can be directly returned to the plating tank.

再生回收的氰化钠和铜氰化钠可直接在镀槽内回用。

ⅳ was synthesized by reaction of ⅲ and cuprous cyanide in 78% yield.

最后Ⅲ和CuCN反应合成了液晶化合物Ⅳ，得率78%。

The influences of reactant ratio, reaction temperature, reaction time on substitution reaction were studied. The better reaction conditions were obtained: molar ratio of trityl chloride and cuprous cyanide was 1:1.3, reaction temperature was at 130 ℃, reaction time was 2.5h.

并通过对原料配比、反应温度和反应时间的研究，得到了较佳的合成工艺条件：三苯基氯甲烷与氰化亚铜的最佳摩尔比为1：1.3，反应温度为130℃，反应时间为2.5小时。

PU paint firming agent, PU Jiaozhanji: floating toluene two different cyanic acid resin ( TDI).

聚氨酯漆固化剂、聚氨酯胶粘剂：游离甲苯二异氰酸脂（TDI）。

Study on Quantum Chemistry of the Addition Reaction for Carbene with Cyanic Acid

卡宾与氢氰酸加成反应机理的量子化学研究

Safety Countermeasures for Chemical Production Equipment by Using Hydrogen Cyanic Acid as the Raw Materials

氢氰酸原料化工生产装置的安全对策

( CNOH) an unstable acid occurring mainly in the form of explosive salts and esters that is isomeric with cyanic acid.

（CNOH）一种不稳定的酸，主要以易爆炸的盐和酯的形式存在，是氰酸的同质异构体。

A white crystalline acid, C3N3 ( OH) 3, that decomposes with heating to form cyanic acid.

一种白色晶状酸，C3N3（OH）3，用加热作用分解而形成氰酸。

Results showed that sodium cyanate with 98.1% purity could be obtained in the medium of DMF, when the mole ratio of urea to anhydrous sodium carbonate was 2.5, the reaction temperature 120~ 140 ℃ and reaction time 8~ 10 h.

实验结果表明，在DMF反应介质中，当尿素与无水碳酸钠物质的量比为2.50，反应温度120~140℃，反应时间8~10h，可以制得纯度为98.1%的氰酸钠产物。

The preparation of high purity sodium cyanate by liquid-solid chemical reaction method

液固化学反应法制备高纯度氰酸钠

Hydantoin was synthesized from glycine and sodium cyanate, which was condensed with benzaldehyde to give monohydrated sodium phenylpyruvate in 67.0% of overall yield after alkaline hydrolysis.

由甘氨酸和氰酸钠反应合成海因，然后与苯甲醛缩合，经碱水解得到一水合苯丙酮酸钠，总收率为67.0%。

Sodium cyanate was prepared from reactants& urea and anhydrous sodium carbonate through liquid-solid chemical reaction method, in the solvent of N, N-dimethlformamide ( DMF).

使用液固化学反应法，以尿素和无水碳酸钠为原料，在N，N-二甲基甲酰胺（DMF）溶剂的反应介质中，制备了氰酸钠产品。

Process of synthesizing ACVA from cyan alcohol was studied, using sodium cyanide, levulinic acid, and A as starting materials.

对氰醇法合成ACVA的工艺进行了研究，该法采用氰化钠、果糖酸及物质A为原料。

All-Solid-State Continuous-Wave Doubly Resonant All-Intracavity Sum-Frequency Mixing Cyan Laser at 500.8 nm

全固态复合式内腔和频500.8nm连续波青光激光器