Traditional Chinese medicine extraction equipment to extract artemisinin technology was studied

Detailed description of copper solvent extraction procedure, other metal all be similar as the process, only the extraction reagent and liquid condition has a little different, you can refer this to do the laboratory test, you’ll get understand it.

Liquid chromatography of DZ988N and DZ902 copper extraction reagent

Turkish customer's laboratory test and our suggestion

In the electrolyzer, manganese will be oxidized to MnO4 - and Mn3 + on the anode. These ions have strong oxidability, which can oxidize diluent and extractant, causing serious degradation of organic phase. A certain amount of iron in the electrolyte can control the formation of MnO4 - and greatly reduce the degradation of organic phase due to the presence of manganese. When Mn has been transferred to the copper rich electrolyte, let Fe: Mn = (8 ~ 10): 1 in the electrolyte, reduce the oxidation of Mn to the extractant.

① The mixing speed of mixing chamber is too fast, resulting in the emulsification of organic phase ② Poor clarification effect or incomplete filtration of leaching solution ③ Organic degradation caused by residual oxidant in leaching process ④ Accumulation of impurities and suspended particles.

Copper exists in the form of Cu2 +, CuCl +, cucl3 -, cucl42 - in the chlorinated system. When oxime copper extractant is used for extraction, copper ions in Cu2 +, CuCl + state enter the organic phase. The experimental results show that when the chloride concentration is not higher than 70g / L, the extraction rate of copper is almost not affected. When the chloride ion content in the system is higher than 70g / L, the extraction rate of the extraction system will be reduced due to the formation of a large number of complex anions. In the cell, chlorine gas will be generated; chloride ion has an adverse effect on the crystal growth of cathode copper, affecting the stripping and the color of cathode copper. The upper limit of chloride concentration allowed in the electrolyte is 40-50mg / L. when the electrolyte contains 20-25mg / L chloride, it is favorable for the deposition of cathode copper.

Under acid condition, nitration reaction will take place between nitrate and copper extractant (hydroxime) to form corresponding nitroaldoxime or nitroketoxime. After nitrification, the extraction ability of the extractant is very strong, but it is very difficult to reverse extraction ability. Even with 200g / L sulfuric acid, it is difficult to reverse extract the copper loaded in it. For the conventional electrolyte stripping system, the nitrated extractant can not be regenerated, so it has basically lost the ability of re extraction. Nitrate can not only nitrate with extractant, but also oxidize extractant and accelerate the degradation of extractant. Under the condition of high acidity, NO3 - has a strong oxidative damage to the extractant, some of which have been oxidized and degraded without nitration.

If too much iron enters into the electrolysis system, although it is beneficial to inhibit the oxidation of manganese ion, the oxidation and reduction of Fe2 + and Fe3 + at the cathode and anode are carried out repeatedly, which will not only directly consume electric energy, but also make the deposited cathode copper re dissolve, reducing the current efficiency.

We want to find the engineers of wet metallurgy joint us to promote our reagents, because the production is very professional, if is very difficult for us to communicate with customer, even technology or language.

Pass through these test process, you will know that our reagent is workable in your plant, can free to use it without concern.

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The solvent extraction method has the advantages of good selectivity, high metal recovery rate, and fast mass transfer speed.

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