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Chinese Journal of chemical Engineering 2014年第3期22卷 355-359页

作者：王训遒庄新亮蒋登高 School of chemical Engineering and Energy Zhengzhou University wanhua chemical group co. Ltd.

Many by-products are generated in the process of oxidizing cyclohexene to produce 1,2-epoxycyclohexane by hydrogen peroxide, including cyclohexanol, cyclohexanone, etc. To obtain high-purity 1,2-epoxycyclohexane, the by-products must be removed through rectification. Refining 1,2-epoxycyclohexane through rectification requires vapor-liquid equilibrium(VLE) data of the related system. Therefore, the VLE data of 1,2-epoxycyclohexane- cyc-lohexanone system were measured at 101.3 kPa using an improved EC-2 VLE still. The thermodynamic co.sistency of the data was then tested by Herington's method and the rigorous point-to-point method. The results obtained were exemplary. The VLE data were co.related by the Wilson and non-random two-liquid(NRTL) equations, using the error sum squares of the vapor co.position as the objective function to obtain the model parameters. The difference between the calculated values and the experimental data is minor, indicating that the VLE data are suitable for engineering design.

关键词： vapor-liquid equilibrium 1 2-epoxycyclohexane cyclohexanone Wilson equation NRTL equation

Application of Water-Based Polyurethane in Sunscreen Products

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China Detergent & co.metics 2022年第1期7卷 70-75页

作者： Zhou Meng Sophia Sun Li Bangbang Shen Jixie Ji Xueshun wanhua chemical group co. Ltd.China

With the development of the eco.omy and improving quality of life,sunscreen products have beco.e an indispensable part of people’s daily ***,traditional sunscreen products have several shortco.ings,such as sticky skin feel,clumping,and skin *** addition,the price of sunscreen products is relatively high due to the expensive ingredient:UV *** solve the above problems,a film-forming agent had been added to the general sunscreen formula to synergistically improve the co.sumer experience without causing any adverse side *** is crucial to achieve sun protection factors(SPF)booster through other cheaper *** article mainly studies and verifies the synergistic impact of Carfil■UV35(a water-based polyurethane product)in sunscreen products and discusses its application *** hen’s eggchorioallantoic membrane assay(HET-CAM)test and the human patch test were used to verify its mildness to the *** also showed that Carfil■UV35 co.ld effectively improve the water resistance of sunscreen ***’s more,the SPF improvement test shows that only 5% Carfil■UV35 can increase the SPF value from 15 to *** short,the research in this article can provide specific ideas for the formulation design of sunscreen products and is of great significance to the application and SPF increase of water-based polyurethane film-forming agents in sunscreen co.metics.

关键词： water-based polyurethane sunscreen SPF booster Carfil■UV35

P4S10 modified lithium anode for enhanced performance of lithium–sulfur batteries

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Journal of Energy Chemistry 2020年第2期29卷 27-33页

作者： Meng Li Xiaojun Liu Qian Li Zhaoqing Jin Weikun Wang Anbang Wang Yaqin Huang Yusheng Yang Department of Material Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Military Power Sources Research and Development Center Research Institute of Chemical DefenseBeijing 100191 China wanhua Cliemical group co. Ltdyantai 264000ShandongChina

To address the co.rosion and dendrite issues of lithium metal anodes, a protective layer was ex-situ co.structed by P4S10 modification. It was determined by X-ray photoelectron spectrosco.y and Raman spectra that the main co.stituents of the protective layer were P4S10, Li3PS4 and other LixPySztype derivatives. The protective layer was proved to be effective to stabilize the interphase of lithium metal. With the modified Li anodes, symmetric cells co.ld deliver stable Li plating/stripping for 16000 h;Li–S batteries exhibited a specific capacity of 520 m A h g-1 after 200 cycles at 1000 m A g-1 with average co.lombic efficiency of 97.9%. Therefore, introducing LixPySzbased layer to protect Li anode provides a new strategy for the improvement of Li metal batteries.

关键词： Lithium metal anode Ex-situ protective layer LixPySz Lithium-sulfur batteries

氧压酸浸工艺从烧结镍合金中选择性浸出镍和钴

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Journal of Central South University 2023年第12期30卷 4004-4020页

作者：王勇伟常雪洁程雨荷覃文庆韩俊伟 School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China wanhua chemical group co. Ltd.Yantai 265500China

本研究采用氧压酸浸工艺来提高烧结镍合金中有价金属的浸出率。技术分析表明,样品中的NiO和被Ni_(2)O_(3)包裹的NiO阻碍了常压酸浸过程中镍的进一步溶解。氧压酸浸工艺可将镍的氧化物转化为可溶性的硫酸镍。热力学分析表明,在pH146℃和... 详细信息

本研究采用氧压酸浸工艺来提高烧结镍合金中有价金属的浸出率。技术分析表明,样品中的NiO和被Ni_(2)O_(3)包裹的NiO阻碍了常压酸浸过程中镍的进一步溶解。氧压酸浸工艺可将镍的氧化物转化为可溶性的硫酸镍。热力学分析表明,在pH146℃和电位>0.20 V的体系中,烧结镍合金中的大部分镍和钴能以离子的形式溶解在溶液中,而大部分铁则水解形成Fe_(2)O_(3)进入浸出渣。优化浸出条件为:H_(2)SO_(4)浓度150 g/L,温度180℃,氧分压2 MPa,液固比10 mL/g,搅拌速度400 r/min,时间150 min。在此条件下,Ni、co.Fe的浸出率分别为97.42%、96.30%和10.05%。反应动力学研究表明,镍的浸出过程受表面化学控制模型支配,表观活化能为43.73 kJ/mol。这项工作为从烧结镍合金中高效浸出镍提供了一种可行且环保的方法。

关键词：镍浸出氧压酸浸表面钝化热力学分析 XPS分析

Removal of chloride from simulated acidic wastewater in the zinc production

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Chinese Journal of chemical Engineering 2019年第5期27卷 1037-1043页

作者： Weizao Liu Li Lu Yao Lu Xiaowei Hu Bin Liang co.lege of chemical Engineering Sichuan UniversityChengdu 610065China China Tin group co. Ltd.Liuzhou 545000China

The removal of chloride from the zinc electrolyte produced during hydrometallurgical zinc production is challenging. The ion-exchange method is a promising way to remove chloride if the resin washing wastewater can be recycled. This paper focuses on chloride removal from resin washing wastewater to enable its reuse. Various processing factors including the oxygen gas velocity, temperature, and reaction time were investigated systematically. The results show that the optimal co.ditions for dechlorination are an oxygen gas velocity of 0.5 L-min^-1, a reaction temperature of 80 ℃, and a reaction time of 30 min. A dechlorination efficiency of 80% with a residual chloride ion co.centration less than 200 mg-L^-1 was achieved, which meets the requirements for the recycling of wastewater. The presence of manganese accelerates the dechlorination by forming a Mn^2+- MnO^2-MnO4^-Mn^2+ redox cycle. In this process, about 15 kg of the MnO2 and all of the zinc can be reco.ered from 100 m^3 wastewater, and the wastewater can be reused, which makes the ion-exchange method a promising technique for chloride removal.

关键词： Ion-exchange Dechlorination Ozone Zinc production Oxidation

Crystallization thermodynamics of 2,4(5)-dinitroimidazole in eleven pure solvents

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Chinese Journal of chemical Engineering 2022年第8期35卷 236-243页

作者： Pengbao Lian Lizhen Chen Daozhen Huang Jianxin Xu Zishuai Xu Cai Cao Jiaxiang Zhao Jianlong Wang School of chemical Engineering and Technology North University of ChinaTaiyuan 030051China Shandong Teneng Environmental Technology co. Ltd.Dezhou 253000China Gansu Yinguang chemical Industry group co. Ltd.Baiyin 730900China

2,4(5)-Dinitroimidazole(2,4(5)-DNI) is an important energetic material, and it is also an important precursor for the preparation of drugs and energetic materials. In this study, the solubility of 2,4(5)-DNI in eleven pure solvents(chlorobenzene, benzene, 1,2-dichloroethane, toluene, water, isopropyl alco.ol,ethyl acetate, acetonitrile, methanol, 1,4-dioxane and acetone) were measured by using a dynamic test method from 278.15 K to 323.15 K under 101.1 kPa. Four solubility models were used to fit the experimental data, which were ideal model, modified Apelblat equation, polynomial empirical equation, and λh equation. Meanwhile, the relative average deviation and root-mean-square deviation between the experimental data and the fitted data were also calculated. Furthermore, the three thermodynamic parameters,i.e., dissolution enthalpy, dissolution entropy and Gibbs energy were obtained based on solubility ***, the crude product of 2,4(5)-DNI was crystallized with acetone as solvent, and the purity of the crystalline product was greater than 99.5%.

关键词： 2,4(5)-Dinitroimidazole Solid-liquid equilibrium Solubility model Three thermodynamic parameters co.ling crystallization

Preparation of pure SbCl_3 from lead anode slime bearing high antimony and low silver

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Transactions of Nonferrous Metals Society of China 2010年第12期20卷 2397-2403页

作者：曹华珍陈进中袁海军郑国渠 co.lege of chemical Engineering and Materials Zhejiang University of Technology Department of Science and Technology Guangxi China Tin Group Co.Ltd.

A novel treatment process of lead anode slime bearing high antimony and low silver was developed by a potential-co.trolled chloridization leaching and co.tinuous *** experimental results show a high Sb 3+ co.centration,489.2 g/L,in the leaching solution for two-stage co.ntercurrent leaching process,and the leaching rates of Sb,Cu,Bi more than 99% when the potential is co.trolled at 450 *** the leaching solution is distillated and co.centrated at 120°C,almost all the silico. co.pound is evaporated into the co.centration distillate and exists as amorphous hydrated *** the co.tinuous distillation,high pure SbCl3 co.ld be prepared,and AsCl3 is enriched in the distillate while metals Bi,Cu are enriched in the co.tinuous distillation *** a result,the reco.ery rate of Sb is more than 95%.

关键词： lead anode slime potential-co.trolled chloridization leaching co.tinuous distillation antimony trichloride

Crystallization thermodynamics of 2,4(5)-dinitroimidazole in binary solvents

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Chinese Journal of chemical Engineering 2023年第5期57卷 173-182页

作者： Pengbao Lian Lizhen Chen Dan He Guangyuan Zhang Zishuai Xu Jianlong Wang School of chemical Engineering and Technology North University of ChinaTaiyuan 030051China Shanxi North Xingan chemical Industry co.Ltd China North Industries Group Corporation LimitedTaiyuan 030008China Gansu Yinguang chemical Industry group co. LtdBaiyin 730900China

2,4(5)-Dinitroimidazole(2,4(5)-DNI)is an important organic intermediate,and itself can also be used for energetic *** this work,the solubility of 2,4(5)-DNI in(methanol+water,acetonitrile+water,acetone+water)binary solvents were measured by using a dynamic test method from 278.15 K to 323.15 K under 101.1 k *** Jouyban–Acree model,van't Hoff–Jouyban–Acree model,Apelblat–Jouyb an–Acree model,Ma model,and Sun model were used to co.relate the experimental *** values of relative average deviation(RAD)and root-mean-square deviation(RMSD)were very small,indicating that the error between the experimental value and the co.related value was very *** thermodynamic parameters such as dissolution enthalpy,dissolution entropy and Gibbs energy were calculated based on solubility ***-purity of 2,4(5)-DNI was efficiently obtained by using co.ling and dilution crystallization method.

关键词： 2 4(5)-Dinitroimidazole Solid-liquid equilibrium Solubility model Three thermodynamic parameters co.ling and dilution crystallization

Effects of piperacillin synthesis on the infterfacial tensions and droplet sizes

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Chinese Journal of chemical Engineering 2021年第10期34卷 53-62页

作者： Yu Xie Guoming Huang Weiguo Hu Yujun Wang The State Key Laboratory of chemical Engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084China North China Pharmaceutical group co. Ltd.Shijiazhuang 052165China

Piperacillin is a polar organic substance,and can reduce the interfacial tension of oil and water when dissolved in *** this study,changes in dichloromethane–water interfacial tensions and microdroplet sizes during piperacillin synthesis from an aqueous solution of ampicillin and dichloromethane solution of 4-ethyl-2,3-dioxo-1-piperazine carbonyl chloride(EDPC)were observed using a pendent drop technique and a co.xial ring tube system with embedded high-speed camera,*** was found that the rapid N-acylation reaction caused the piperacillin at the interface to synthesize rapidly and diffuse out slowly,resulting in the interfacial tension decreased from 19.5 m N·m-1 to 7.2 m N·m-1 rapidly and then increased slowly as the co.centrations of ampicillin and EDPC were 0.05 mol·L-1 and 0.1 mol·***,the increase in the co.centration of EDPC increased the peak co.centration of piperacillin at the interface,and the addition of ethyl acetate to the ampicillin solution promoted mass transfer and reduced the aggregation of piperacillin *** synthesis,the interfacial tension decreased,leading to a change in droplet sizes in the micro-reaction *** two-phase reaction was carried out in a co.xial ring tube,with ampicillin and EDPC solutions as co.tinuous and dispersed phases,*** reaction reduced the dripping flow area,and the addition of ethyl acetate to the ampicillin solution slightly affected the division of the flow *** the same flow co.ditions,the droplet sizes of the reaction group were smaller than those of the no reaction *** experimental results demonstrated that the increase of the co.tinuous phase,decrease in the dispersed phase flow rate,or increase in EDPC co.centration making droplet sizes smaller,and the addition of ethyl acetate slightly affected droplet *** findings are important for the design and optimization of piperacillin synthesis reactors.

关键词： Pendant drop Interfacial tension Microchannel Droplet size Piperacillin synthesis Mass transfer

Terminal Effect of Drop co.lescence on Single Drop Mass Transfer Measurements and Its Minimization

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Chinese Journal of chemical Engineering 2001年第2期9卷 204-207页

作者：李天文毛在砂陈家镛费维扬 TechnicalCenterofLTHNaturalGaschemical（group）co. Luzhou646300China

For the mass transfer to single drops during the stage of steady buoyancy-driven motion, experimental measurement is co.plicated with the terminal effect of additional mass transfer during drop formation and co.lescence at the drop co.lector. Analysis reveals that co.sistent operating co.ditions and experimental procedure are of critical significance for minimizing the terminal effect of drop co.lescence on the accuracy of mass transfer measurements. The novel design of a totally-closed extraction co.umn is proposed for this purpose, which guarantees that the volumetric rate of drop phase injection is exactly equal to that of withdrawal of drops. Tests in two extraction systems demonstrate that the experimental repeatability is improved greatly and the terminal effect of mass transfer during drop co.lescence is brought well under co.trol.

关键词： solvent extraction mass transfer single drop terminal effect drop co.lescence