氰化法

Direct cyanidation will be taken and roasting process will not be necessary after removal of arsenic.

难浸金矿石和精矿用常规氰化法直接提取时，不能有效地回收金，因此，必须经过预处理。

Using cyanidation method to leach gold from smelting slags .

采用氰化法提取冶炼尾渣中的金，采用单因素和正交试验考察各因素对金浸出的影响。

This route overcomes the shortcoming on environmental pollution and poison in the cyanide process, which is widely applied in our country. This route isnt known in our country. It is a new environmental pollution process, and is in according with the progress of industrial policy. In the second step, the methyl isobutyl ketone which introduced in the patent is replaced by the material A, and the marketable foreground of the byproduct is considered. It is an innovated process, which can supply a gap in our county.

文中探讨的工艺路线克服了国内所广泛采用的氰化法路线所带来的环境污染和人体危害问题，目前国内尚未有报道，是一条新型的环保路线，符合国家产业政策的发展方向，而且在第二步3-氨基丙醇的合成中，用原料A取代专利中介绍的甲基异了酮，在获得产物的同时又兼顾了副产物的市场潜力，工艺上具有创新性，可填补国内该工艺路线的空白。

This item plans to construct 5 thousand t/y Tert - butylamine production equipment which uses internally developed independently isobutene cyanide process for the production of raw materials for pure isobutylene, purity of 99.5% of the domestic production of tert - butylamine.

拟建设5000吨/年叔丁胺生产装置。该装置采用国内自主开发的异丁烯氰化法生产工艺，以纯异丁烯为原料，生产纯度为99.5％的叔丁胺产品。

This item plans to construct 5 thousand t/y Tert - butylamine production equipment which uses internally developed independently isobutene cyanide process for the production of raw materials for pure isobutylene, purity of 99.5% of the domestic production of tert - butylamine.

该装置采用国内自主开发的异丁烯氰化法生产工艺，以纯异丁烯为原料，生产纯度为99.5％的叔丁胺产品。

One is the interstitial water or zeolitic water, it corresponds to the broad absorptive band at around 3498 cm〓 that results from the association of water owing to the H-bonding. 2 The other is the water coordinated to lanthanum, corresponding to the very strong sharp peak at 3607cm〓, The peaks at around 1600cm〓 were assigned to the bending vibrations of water in LaHCF, two sharp peaks were found at 1601cm〓 and 1624cm〓 respectively, which correspond to two bending vibrations of the interstitial water and the coordinated water respectively in the structure of LaHCF.

通过电化学扫描法，得到了一种有电活性的稀土元素化学修饰电极—铁氰化镧修饰电极；并用循环伏安法进行了表征，比较了碱金属离子Li〓，Na〓，K〓，Rb〓，Cs〓和H〓在膜中的通透性，结果表明氢离子能透过铁氰化镧膜而碱金属离子则不能透过铁氰化镧膜；稳定性研究表明，该修饰电极在纯1.0mol/L HCl溶液中扫描，峰电流迅速下降，到第10圈时峰电流几乎为零，而在混合溶液1.0mol/L KCl+0.10mol/L HCl。

Application of calcium peroxide has become wider and wider.It was not only used in the fields of rice direct sowing,edible fungus production,soil improvement,aquiculture,wastewater treatment,chemical production,and air purification etc.,but also it has been used as food and feed additive,fruit and vegetable preservative,assisting agent for gold extraction by cyanidation and so on.

过氧化钙可用于水稻直播、食用菌生产、土壤改良、水产养殖、污水处理、化工生产与空气净化等领域，可用作食品和饲料添加剂、水果和蔬菜保鲜剂、氰化法提金助剂等，有着越来越广泛的用途。

And the application of glycollic acid in the fields of chemical cleaning, auxiliaries and materials were introduced in detail.

概述了羟基乙酸几种主要工业合成方法的工艺条件及存在的主要问题，即氯乙酸水解法、氰化法、甲醛羰基化法和一氯乙酸钾水解法。

A brief account of technique conditions of several main technique routes for synthesizing glycollic acid and existing main problems in it are given.

概述了羟基乙酸几种主要工业合成方法的工艺条件及存在的主要问题，即氯乙酸水解法、氰化法、甲醛羰基化法和一氯乙酸钾水解法。

Because of higher heavy metals concentration in leaching solution,the displacement rate of gold and silver with zinc powder is lower.

遂昌金矿采用氰化法处理高铜铅锌金精矿，由于浸出液中重金属含量偏高，在用锌粉置换金和银时置换率偏低，最低时金置换率只有12.66%。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。