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Clean synthesis of calix[4]crown-5-sulfonyl cyclothiourea derivatives at room temperature in aqueous solution

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Chinese Chemical Letters 2009年第10期20卷 1166-1169页

作者： Cong Wen ding ming jie Zhang Ning Ma Chemistry Department of Science School Tianjin University Tianjin 300072 China

Calix[4]-crown-5-sulfonyl cyclothiourea derivatives 6 and 7 were synthesized from calix[4]-crown-5-monosulfonylethylenediamine derivatives 4 and 5 and carbon disulfide through nucleophilic addition and subsequent cyclization of intramolecule at room temperature in aqueous solution. The advantages of the novel protocol are the mild reaction condition, free organic solvent, simple final treatment, easy isolation of products and excellent yields.

关键词： Room temperature Aqueous solution Calix-crown-5-sttlfonyl cyclothiourea Clean synthesis

Group separation and analysis of a carbon disulfide-soluble fraction from Shenfu coal by column chromatography

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Journal of China University of Mining and Technology 2008年第1期18卷 27-32页

作者： ding ming-jie ZONG Zhi-min ZONG Ying OUYANG Xiao-dong HUANG Yao-guo ZHOU Lei ZHENG Yu-xuan ZHOU Xiao WEI Yan-bin WEI Xian-yong School of Chemical Engineering and Technology China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China Department of Light Industry Luohe Vocational Technology College Luohe Henan 462002 China Key Laboratory of Coal Conversion and New Carbon Materials Wuhan University of Science and Technology Wuhan Hubei 430081 China

A carbon disulfide-soluble fraction (CDSSF) from Shenfu coal was separated into five fractions by silica-gel column chromatography using hexane and n-hexane/ethyl acetate binary eluent. The five fractions include four clear group fractions and a nonpolar fraction. All the fractions were analyzed by GC/MS. A total of 204 compounds were detected from the original CDSSF and its further separated fractions, with 173 compounds more than those detected by studying the original CDSSF directly. The results demonstrate a clear group separation by column chromatography in coal organic components and a more accessibility to coal components compared with the solvent extraction only.

关键词： group separation column chromatography coal

Separation and analysis of aromatic hydrocarbons from two Chinese coals

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Journal of China University of Mining and Technology 2008年第3期18卷 432-436页

作者： ding ming-jie LI Wen-dian XIE Rui-lun ZONG Ying CAI Ke-ying PENG Yao-li ZONG Zhi-min WIE Rui-lun WEI Xian-yong School of Chemical Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221116 China Department of Light Industry Luohe Vocational Technology College Luohe Henan 462002 China Key Laboratory of Coal Conversion and New Carbon Materials Wuhan University of Science and Technology Wuhan Hubei 430081 China

Separation and analysis of aromatic hydrocarbons (AHs) from coals is of considerable significance for both fuel and non-fuel use of the coals. In present work two Chinese bituminous coals were selected for separation of AHs by ultrasonic extrac-tion with CS2 followed by column chromatography using hexane as eluent. A series of AHs were separated from the two coals and analyzed by GC/MS. FTIR was employed to characterize the raw coals and the extracted residues. The results of GC/MS analysis show that the separated AHs are mono- to tetracyclic arenes, among which the principle AHs are alkyl naphthalenes and phenan-threnes. Obvious differences in the composition and the structure of AHs exist between the two coals, i.e., the AHs from Tongting coal tend to be higher rings compared to those from Pingshuo coal both from the variety and from the abundance of the AHs. FTIR analysis shows that the raw and extracted coals are similar in terms of functional groups, suggesting that the composition and structure of CS2 extract, especially the AHs, from coals can be used to interpret the coal structure to some extent.

关键词： aromatic hydrocarbon column chromatography coal GC-MS

Recycling Fe and improving organic pollutant removal via in situ forming magnetic core-shell Fe_(3)O_(4)@CaFe-LDH in Fe(Ⅱ)-catalyzed oxidative wastewater treatment

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Journal of Environmental Sciences 2025年第1期147卷 523-537页

作者： Ting He jie Sun Liangwei Deng Jialin ming Changwei Hu Key Laboratory of Green Chemistry and Technology Ministry of EducationCollege of ChemistrySichuan UniversityChengdu 610064China Biogas Institute of Ministry of Agriculture and Rural Affairs Chengdu 610041China Inner Mongolia Key Laboratory of Fine Organic Synthesis Inner Mongolia UniversityHohhot 010021China

Due to its high efficiency,Fe(Ⅱ)-based catalytic oxidation has been one of the most popular types of technology for treating growing organic pollutants.A lot of chemical Fe sludge alongwith various refractory pollutantswas concomitantly produced,whichmay cause secondary environmental problemswithout proper *** here innovatively proposed an effective method of achieving zero Fe sludge,reusing Fe resources(Fe recovery=100%)and advancing organics removal(final TOC removal>70%)simultaneously,based on the in situ formation of magnetic Ca-Fe layered double hydroxide(Fe_(3)O_(4)@CaFe-LDH)***(Ca^(2+)and Fe^(3+))concentration(≥30 mmol/L)and their molar ratio(Ca:Fe≥1.75)were crucial to the success of the *** nano Fe_(3)O_(4)was designed to be involved in the Fe(Ⅱ)-catalytic wastewater treatment process,and was modified by oxidation intermediates/products(especially those with COO-structure),which promoted the co-precipitation of Ca^(2+)(originated from Ca(OH)_(2)added after oxidation process)and byproduced Fe^(3+)cations on its surface to in situ generate core-shell Fe_(3)O_(4)@*** oxidation products were further removed during Fe_(3)O_(4)@CaFe-LDH material formation via intercalation and *** applicable to many kinds of organicwastewater,such as bisphenol A,methyl orange,humics,and biogas *** prepared magnetic and hierarchical CaFe-LDH nanocomposite material showed comparable application performance to the recently reported *** work provides a new strategy for efficiently enhancing the efficiency and economy of Fe(Ⅱ)-catalyzed oxidative wastewater treatment by producing high value-added LDHs materials.

关键词： CaFe layered double hydroxide Fe(Ⅱ)-catalytic oxidation Fe recycling Magnetic nanomaterial in situ formation Fe_(3)O_(4)modification

Reactivities of Shenfu Chars Toward Gasification with Carbon Dioxide

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Journal of China University of Mining and Technology 2007年第2期17卷 197-200页

作者： ZHANG Jia-wei ZONG Zhi-min WANG Tao-xia XIE Rui-lun ding ming-jie CAI Ke-ying HUANG Yao-guo GAO Jin-sheng WU You-qing WEI Xian-yong School of Chemical Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China Luohe Occupation Technical College Luohe Henan 462000 China College of Resource and Environmental Engineering East China University of Science and Technology Shanghai 200237 China

Five Shenfu char samples were prepared from Shenfu raw coal at different temperatures （950, 1100, 1200, 1300 and 1400℃） using a muffle furnace. Demineralization of the char samples was performed by treating them with 10% nitric acid for 10 min in a CEM Discover microwave reactor. The gasification of the chars, and corresponding demineralized chars, in a carbon dioxide （CO2） atmosphere was conducted in a Netzsch STA 409Cl31F tempera- ture-programmed thermogravimetry apparatus. The effects of charring temperature and demineralization on the gasification reactivity of chars were systematically investigated. The results show that a char formed at a lower temperature is more reactive except for demineralized char formed at 1100℃, which is less reactive than char formed at 1200℃. Demineralization decreases the char reactivities toward gasification with CO2 to a small extent.

关键词： demineralization temperature-programmed thermogravimetry reactivity

Efficient implementation of quantum permutation algorithm using a polar SrO molecule in pendular states

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Communications in Theoretical Physics 2025年第2期77卷 41-53页

作者： jie-Ru Hu Zuo-Yuan Zhang Jin-ming Liu State Key Laboratory of Precision Spectroscopy School of Physics and Electronic Science East China Normal University School of Physical Science and Technology Yangzhou University Chongqing Key Laboratory of Precision Optics Chongqing Institute of East China Normal University

Quantum algorithms offer more enhanced computational efficiency in comparison to their classical counterparts when solving specific tasks. In this study, we implement the quantum permutation algorithm utilizing a polar molecule within an external electric field. The selection of the molecular qutrit involves the utilization of field-dressed states generated through the pendular modes of SrO. Through the application of multi-target optimal control theory, we strategically design microwave pulses to execute logical operations, including Fourier transform,oracle Ufoperation, and inverse Fourier transform within a three-level molecular qutrit *** observed high fidelity of our outcomes is intricately linked to the concept of the quantum speed limit, which quantifies the maximum speed of quantum state manipulation. Subsequently,we design the optimized pulse sequence to successfully simulate the quantum permutation algorithm on a single SrO molecule, achieving remarkable fidelity. Consequently, a quantum circuit comprising a single qutrit suffices to determine permutation parity with just a single function evaluation. Therefore, our results indicate that the optimal control theory can be well applied to the quantum computation of polar molecular systems.

关键词： polar molecule optimal control quantum permutation algorithm pendular states

Mechanism analysis of effect of MgO on reduction swelling behaviour of iron pellets in CO/H_(2)atmosphere based on first-principles calculations

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Journal of Iron and Steel Research International 2025年第1期32卷 73-84页

作者： Hong-ming Long Jing-shu An Xing-wang Li Ting Wu Sheng-ping He jie Lei School of Metallurgical Engineering Anhui University of TechnologyMa’anshan243032AnhuiChina Key Laboratory of Metallurgical Emission Reduction and Resource Comprehensive Utilization(Anhui University of Technology) Ministry of EducationMa’anshan243002AnhuiChina College of Materials Science and Engineering Chongqing UniversityChongqing400044China

To explain the influence mechanism of MgO on the consolidation and reduction characteristics of roasted iron pellets,the properties and structure of pellets were investigated from *** indicated that the MgO addition decreased the reduction swelling index(RSI)and reduction degree of pellets in both CO and H_(2)*** the stepwise reduction process of Fe2O3→Fe3O4→FeO,the reduction behaviour of pellets in CO and H_(2)was similar,while the reduction rate of pellets in H_(2)atmosphere was almost twice as high as that in CO *** the stepwise reduction process of FeO→Fe,the RSI of pellets showed a logarithmic increase in CO atmosphere and a linear decrease in H_(2)*** investigated by first-principles calculations,C and Fe mainly formed chemical bonds,and the CO reduction process released energy,promoting the formation of iron ***,H and Fe produced weak physical adsorption,and the H_(2)reduction process was endothermic,inhibiting the generation of iron *** Mg2+doping in FexO,the nucleation region of iron whiskers expanded in CO reduction process,and the morphology of iron whiskers transformed from“slender”to“stocky,”reducing RSI of the pellets.

关键词： MgO CO atmosphere H_(2)atmosphere Reduction degree Reduction swelling index First-principles calculation

Subsection cooling system of hot rolling silicon steel and its industrial application

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Journal of Iron and Steel Research International 2025年第1期32卷 159-170页

作者： Qiu-na Wang Ji-quan Sun Li-po Yang Hai-shen Wang Li-jie Dong jie-ming Li Zhen-yang Zhi Yan-wen Bi National Engineering Research Center of Flat Rolling Equipment University of Science and Technology BeijingBeijing100083China Hot Rolling Department of Qian’an Iron and Steel Corporation Shougang Company LimitedTangshan064404HebeiChina National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan UniversityQinhuangdao066004HebeiChina

An online subsection cooling method for hot rolling silicon steel was designed to achieve local adjustment of transverse roll ***,it was able to meet the requirements of edge drop of the strip by using the features of online thermal ***,after the new subsection spray beam was installed at the exit of mill,the special local cooling rules were analyzed for altering the thermal crown of roll according to rolling process ***,the dynamic impact of subsection cooling on the local thermal crown could just be obtained according to the measured ***,the heat transfer coefficient was determined by different subsection cooling curves under varied rolling ***,the rolling rhythm and variable conditions were important dynamic factors of transient roll temperature in practical rolling ***,real-time calculation and presetting of the thermal crown were carried out to maximize special requirements of load roll gap on local strip *** this new method,the transient temperature and the thermal crown of roll could be quantitatively controlled *** the practical results showed that the predicted temperature was able to match the measured value by more than 95%.Meanwhile,the adjustable range of thermal crown increased by more than 2.5 ***,the qualification rate of strip edge crown has increased from the original 30%to over 70%.

关键词： Subsection cooling Thermal roll crown Multi-parameter coupling Hot rolling Silicon steel

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我国政策网络研究回顾

广东行政学院学报 2011年第3期23卷 28-33页

作者：定明捷华中师范大学管理学院湖北武汉430079

新世纪以来,我国学者陆续开展了对政策网络的研究,其研究可以划分为政策网络与网络治理两大取向,学者们在对西方政策网络研究的梳理与评价、新理论的建构、检验验证与模型整合与修正等方面都或多或少地取得了一些成果。但总体来看,研究... 详细信息

新世纪以来,我国学者陆续开展了对政策网络的研究,其研究可以划分为政策网络与网络治理两大取向,学者们在对西方政策网络研究的梳理与评价、新理论的建构、检验验证与模型整合与修正等方面都或多或少地取得了一些成果。但总体来看,研究处于较低的阶段,研究质量也难以保障。因而要推进我国政策网络研究,需要紧密跟踪西方前沿,立足我国实践,明确研究路径,改进方法。

关键词：政策网络研究政策网络取向网络治理取向回顾评估反思