Yunnan Research Institute of Chemical Industry

Kunming, China

Yunnan Research Institute of Chemical Industry

Kunming, China
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Luo X.,Kunming University of Science and Technology | Zeng B.,Yunnan Research Institute of Chemical Industry | Zhao X.,Kunming University of Science and Technology
Xiandai Huagong/Modern Chemical Industry | Year: 2011

To obtain the amount of the conversion agent for the target product MgOHCl, the effect of reaction temperature, reacttion time and reactant mole ratio on the thermal decomposition of NH4Cl with MgO is investigated on a laboratory scale. The results show that, when the reaction temperature is 375°C, reacttion time is 60 minutes and reactant mole ration (nconversion agent/nMgO/nNH4Cl) is 1.3:1:0.6, the nitrogen content in the soild product is about zero and the yield of Cl can reach above 90%. At the same time, the appropriate amount of conversion agent can make NH4Cl turn into MgOHCl directly without the addition of vapors into the reactor.


Wei J.-B.,Kunming University of Science and Technology | Zeng B.,Yunnan Research Institute of Chemical Industry | Luo K.-B.,Yunnan Research Institute of Chemical Industry | Le Y.-G.,Kunming University of Science and Technology
Xiandai Huagong/Modern Chemical Industry | Year: 2012

The production methods and their characteristics are briefly introduced. The superiority of extraction method is proposed. The development of micro-reactors is summarized. The characteristics of micro-reactors, the mixing mechanism and production of potassium dihydrogen phosphate by micro-channel extraction methods are highlighted. The chemical reaction process fitted well with the micro-reactor technology is reviewed as well.


Ma H.,Shaanxi University of Technology | Ma H.,Yunnan Research Institute of Chemical Industry | Feng X.,Shaanxi University of Technology | Yang Y.,Yunnan Research Institute of Chemical Industry | And 2 more authors.
Clean Technologies and Environmental Policy | Year: 2016

Calcium carbide residue is generated from the reaction of CaC2 (calcium carbide) and water in the production of acetylene in the chlor-alkali industry. The main component contained in calcium carbide residue is Ca(OH)2 (calcium hydroxide). At present, great amounts of calcium carbide residue in China are disposed by land stockpiling or landfilling. These disposal practices cause serious environmental pollution and lead to resource wastage. Effective disposal methods by recycling and reusing the calcium carbide residue are urgently needed. In this paper, a novel method for producing feed grade calcium formate from calcium carbide residue is introduced. The calcium carbide residue and CO (carbon monoxide) are utilized as raw materials to prepare Ca(HCOO)2 (calcium formate) through the carbonylation synthesis route. The optimal reaction conditions (reaction temperature = 200 °C, reaction pressure = 6 MPa, reaction time = 22.5 min, and slurry concentration = 0.125 g/mL) have been obtained through pilot-scale experimental studies with the aim of producing high-quality feed grade calcium formate product. Data from the continuous pilot plant are used to evaluate the economic feasibility of the production method. In addition, CO, which is acquired from industrial exhausts, is innovatively used as a reactant to produce calcium formate instead of being treated as a waste material, reducing carbon dioxide emissions significantly. Therefore, the proposed method is a very promising clean and green chemical technology that turns calcium carbide residue and industrial exhaust gas into a useful product, promoting the development of industrial waste recycling in China. © 2016, Springer-Verlag Berlin Heidelberg.


Ma H.,China University of Technology | Ma H.,Yunnan Research Institute of Chemical Industry | Feng X.,China University of Petroleum - Beijing
Xiandai Huagong/Modern Chemical Industry | Year: 2013

The research of solid catalyst preparation technologies has always been an important part of the development of catalytic technology. In this paper, the recent research progress of solid catalysts conventional preparation methods has been summarized. Several kinds of solid catalysts preparation methods are mentioned, such as sol-gel method, microwave method, microemulsion method, plasma technology, and so on.


Mei Y.,Yuntianhua Group Co. | Liang X.-S.,Yunnan Research Institute of Chemical Industry | Yang Y.-B.,Yunnan Research Institute of Chemical Industry | Wu L.-Q.,Yunnan Research Institute of Chemical Industry
Xiandai Huagong/Modern Chemical Industry | Year: 2010

Based on the current status of yellow phosphorus, the technique and product route of yellow phosphorus industry is analyzed, and two pathways to lift up the competence of yellow phosphorus industry is put forward. One way is to further optimize the production technique of yellow phosphorus, to reduce energy consumption; the other is to fully utilize the by-products of off-gas, phosphor slag, dust from electrostatic precipitator, and phosphorous slag to make high-value added products to reduce energy consumption per GDP and raise the whole economic benefit.


Wang D.-P.,China University of Mining and Technology | Liu J.-T.,China University of Mining and Technology | Cao Y.-J.,China University of Mining and Technology | Liu J.-L.,Yunnan Research Institute of Chemical Industry
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | Year: 2011

The property of middle-low grade phosphate rock from southwest of China was analyzed, and the reverse flotation with high efficiency mineral processing equipment and cyclonic-static micro-bubble flotation column was researched. The effects of several parameters on floatation efficiency, namely, the feed capacity, pressure of circulating pump, amount of aeration, and the dosage of collector, sulfuric acid and phosphoric acid were systemically investigated, and the optimal technical and operational conditions were determined. Based on these results, continuous separation tests were carried out. The results show that the phosphate concentrate containing P 2O 5 30.01% and recovery rate of 89.10% can be achieved according to the flow sheet of one rougher and one cleaner under the optimal conditions. The technology provides a new way for the separation of China's phosphate rock with a high quality.

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