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Development of a correlation equation between the diesterification of maleic anhydride and the acidic ionic liquids nature

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Green Chemical Engineering 2023年第1期4卷 57-63页

作者： Yumei Liu shengxin chen Ran An Xingsheng Wang Ruixia Liu Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and EngineeringState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringInnovation Academy for Green ManufactureChinese Academy of SciencesBeijing100190China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing100190China School of Chemical Engineering and Energy Zhengzhou UniversityZhengzhou450001China Department of Chemistry School of Chemical EngineeringDalian University of TechnologyDalian116023China

The sustainable synthesis of dimethyl maleate via diesterification through the utilization of ionic liquid(IL)is of great ***,the relationship between the ILs nature and the reactivity of diesterification is still ***,a series of ILs with different structures were selected for the comprehensive investigation of *** acidity(H_(0))and Kamlet-Taft solvent parameters(hydrogen bond donor ability(α),hydrogen bond acceptor ability(β),and polarizability(π^(*)))of ILs were measured by UV–Visible spectroscopy,and the effects of them on the diesterification of maleic anhydride were also studied in *** results indicated that not only H0of the IL-based catalysis system,but also itsα,β,andπ^(*)influenced the reaction activity of ***,a quantifiable correlation was fitted between the natural logarithm of the rate constant and multiple parameters of ILs,indicating that the diesterification rate had a positive correlation with the H0,α,andπ^(*),and inverse correlation with theβof the IL.A plausible synergetic reaction mechanism for the excellent performance of[(HSO_(3))PMim][HSO_(4)]has been ***,this work thoroughly explored the relationship between the nature of ILs on diesterification in-depth,which will reveal the nature of diesterification in detail.

关键词： Multiparameter correlation equation Diesterification Maleic anhydride Ionic liquids Kamlet-Taft solvent parameters

Simulation and design of a heat-integrated double-effect reactive distillation process for propylene glycol methyl ether production

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Chinese Journal of Chemical Engineering 2022年第12期52卷 103-114页

作者： Ran An shengxin chen Shun Hou Yuting Zhu Chunhu Li Xinbao Zhu Ruixia Liu Weizhong An Department of Chemical Engineering Ocean University of ChinaQingdao 266100China Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and EngineeringState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China College of Chemical Engineering Nanjing Forestry UniversityNanjing 210037China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China

A double-effect reactive distillation(DERD)process was proposed for the production of propylene glycol methyl ether from propylene oxide and methanol to overcome the shortcoming of low selectivity and high-energy consumption in the tubular plug-flow reactor.A single-column reactive distillation(RD)process was conducted under optimized operating conditions based on sensitivity analysis as a *** results demonstrated that the proposed DERD process is able to achieve more than 95%selectivity of the desired *** that,a design approach of the DERD process with an objective of the minimum operating cost was proposed to achieve further energy savings in the RD *** proposed DERD configuration can provide a large energy-savings by totally utilization of the overhead vapor steam in the high-pressure RD column.A comparison of the single-column RD process revealed that the proposed DERD process can reduce the operating cost and the total annual cost of 25.3%and 30.7%,respectively,even though the total capital cost of DERD process is larger than that of the RD process.

关键词： Propylene oxide Reactive distillation Heat integration Propylene glycol monomethyl ether Process simulation

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胰腺分裂症的诊断及内镜治疗研究进展

解放军医学院学报 2024年第5期45卷 556-561页

作者：方开萱陈升鑫陈德鑫翟亚奇李明阳解放军总医院研究生院北京100853 解放军总医院第一医学中心消化内科北京100853 联勤保障部队第960医院山东济南250031

胰腺分裂是最常见的胰腺先天性发育异常,大多数患者无症状,但少数患者合并胰腺炎、慢性腹痛等临床表现,称为胰腺分裂症。近年来,随着医学影像学和内镜技术的不断发展,胰腺分裂症的诊疗取得了一系列进展,无创诊断已成为可能,“超级微创... 详细信息

胰腺分裂是最常见的胰腺先天性发育异常,大多数患者无症状,但少数患者合并胰腺炎、慢性腹痛等临床表现,称为胰腺分裂症。近年来,随着医学影像学和内镜技术的不断发展,胰腺分裂症的诊疗取得了一系列进展,无创诊断已成为可能,“超级微创”的治疗理念日益深入人心。尽管胰腺分裂症的诊疗水平不断提高,但临床中仍存在一些挑战和问题,需要进一步研究和探讨。本文总结了当前胰腺分裂症诊断与内镜治疗研究的最新进展,旨在加深临床医师对胰腺分裂症的认识并提高诊疗能力。

关键词：胰腺分裂胰腺炎内镜逆行胰胆管造影术内镜检查治疗

Synthesis of propylene glycol ethers from propylene oxide catalyzed by environmentally friendly ionic liquids

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Chinese Journal of Catalysis 2017年第5期38卷 879-889页

作者： Cong Zhao shengxin chen Ruirui Zhang Zihang Li Ruixia Liu Baozeng Ren Suojiang Zhang School of Chemical Engineering and Energy Zhengzhou University Zhengzhou 450001 Henan China Beijing Key Laboratory of Ionic Liquids Clean Process Key Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China College of Chemistry and Chemical Engineering Henan University Kaifeng 475004 Henan China

A series of acetate ionic liquids were synthesized using a typical two‐step *** ionic liquids were used as environmentally benign catalysts in the production of propylene glycol ethers from propylene oxide and alcohols under mild *** basic strengths of the ionic liquids were evaluated by determination of their Hammett functions,obtained using ultraviolet‐visible spectroscopy,and the relationship between their catalytic activities and basicities was *** catalytic efficiencies of the ionic liquids were higher than that of the traditional basic catalyst *** can be attributed to the involvement of a novel reaction mechanism when these ionic liquids are used.A possible electrophilic‐nucleophilic dual activation mechanism was proposed and confirmed using electrospray ionization quadrupole time‐of‐flight mass *** addition,the effects of significant reaction parameters such as concentration of catalyst,molar ratio of alcohol to propylene oxide,reaction temperature,and steric hindrance of the alcohol were investigated in detail.

关键词： Ionic liquid Propylene glycol ether Etherification Propylene oxide Basic strength Reaction mechanism Environmental friendly

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桂江电力1号发电机相间短路事故分析

小水电 2007年第5期 60-61页

作者：陈胜新桂江电力有限公司广西梧州543000

1 电站概述广西桂江电力于1997年6月首台机组并网发电,电站在系统中担任调峰填谷任务,并参与系统调频及紧急事故备用.装机容量2×34.5MW,是由奥地利ELIN公司制造的灯泡贯流式水轮发电机组.

关键词：灯泡贯流式水轮发电机组事故分析相间短路电力桂江 ELIN公司并网发电调峰填谷

基于区间二型T-S模糊系统的压电迟滞特性建模

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压电与声光 2020年第6期42卷 843-847,853页

作者：陈圣鑫赵新龙苏强苏良才浙江理工大学机械与自动控制学院浙江杭州310018

为了辨识压电驱动器中固有的迟滞特性,提出了一种基于区间二型Takagi-Sugeno(T-S)模糊系统的建模方案。首先,引用垂直距离公式替换传统的误差计算公式,使聚类算法与所辨识的超平面结果直接相关联,并提出了改进的区间二型模糊C回归模型(F... 详细信息

为了辨识压电驱动器中固有的迟滞特性,提出了一种基于区间二型Takagi-Sugeno(T-S)模糊系统的建模方案。首先,引用垂直距离公式替换传统的误差计算公式,使聚类算法与所辨识的超平面结果直接相关联,并提出了改进的区间二型模糊C回归模型(FCRM)聚类算法用于模糊空间的划分,提高了区间划分精度。其次,针对超球型高斯隶属度函数与超平面型聚类算法结构不匹配的问题,引入了与超平面相匹配的超平面隶属度函数完成模糊前件参数的辨识,并利用最小二乘法完成模糊后件参数的辨识。最后,利用上述方案完成了压电驱动器迟滞特性的建模。实验结果证明该方案是有效的。

关键词：压电驱动器迟滞非线性 Takagi-Sugeno(T-S)模糊系统模糊C回归模型区间二型模糊集

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近10年药房管理专题文献的计量学研究

中国药房 2007年第19期18卷 1468-1471页

作者：蒯丽萍陈盛新舒丽芯第二军医大学药学院药事管理学教研室上海市200433

目的:探讨我国药房管理领域的研究现状和发展趋势,供药事管理专业人员参考。方法:运用文献计量学中的方法对近10年药房管理相关文献进行统计和分析,应用布拉德福定律寻找刊载药房管理文献的核心期刊,并对文献后标有的参考文献进行引文... 详细信息

目的:探讨我国药房管理领域的研究现状和发展趋势,供药事管理专业人员参考。方法:运用文献计量学中的方法对近10年药房管理相关文献进行统计和分析,应用布拉德福定律寻找刊载药房管理文献的核心期刊,并对文献后标有的参考文献进行引文分析。结果:近10年内药房管理类文献增长率达80.75%,共有262种科技期刊刊载过此类文献,其中载文量最多的为《中国药房》;《中国药房》、《中国药业》、《军队医药》、《药学实践杂志》等期刊为刊载药房管理文献的核心期刊;在文献刊载内容方面,有关"社会药房(店)"、"药学服务"及"医院门诊药房管理"方面的内容呈增长趋势。结论:随着我国药房数量和规模的迅速扩张,越来越多的专业人员在药房管理领域展开了研究与探索,为我国药房管理出谋划策。

关键词：药房管理文献计量学布拉德福定律

消费者行为视角下的大宁商业综合体空间绩效评价

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规划师 2018年第2期34卷 101-107页

作者：任熙元王灿王德陈胜馨同济大学建筑与城市规划学院

随着消费者需求层级的不断提高,商业综合体呈现出强大的竞争力和广阔的发展前景。在复杂环境下多要素叠合分析中,基于主观经验和价值判断的传统空间行为研究的局限性日趋凸显,急需更加细致的空间环境评价体系来辅助其设计实践。文章以... 详细信息

随着消费者需求层级的不断提高,商业综合体呈现出强大的竞争力和广阔的发展前景。在复杂环境下多要素叠合分析中,基于主观经验和价值判断的传统空间行为研究的局限性日趋凸显,急需更加细致的空间环境评价体系来辅助其设计实践。文章以上海大宁国际商业广场为例,通过构建商业综合体的空间绩效评价指标体系,从消费活力、消费者体验及空间紧凑度3个方面对其总体绩效进行评价,并进一步从空间优势、自身效益及连带效应3个维度评判各空间分区的空间绩效,为将来的空间优化提供参考。

关键词：商业综合体消费者行为空间绩效评价大宁国际

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加强基本药物制度在慢性疾病治疗中的作用

中国药事 2013年第2期27卷 125-127页

作者：陈开宇陈盛新第二军医大学药事管理学教研室上海200433

目的为进一步发挥国家基本药物制度在慢性疾病治疗中的作用提供参考。方法介绍了我国慢性疾病的现状和特点,分析在慢性疾病治疗过程中推行基本药物制度所面临的困难,提出相关建议。结果与结论近年来,我国慢性疾病患病率持续上升。应根... 详细信息

目的为进一步发挥国家基本药物制度在慢性疾病治疗中的作用提供参考。方法介绍了我国慢性疾病的现状和特点,分析在慢性疾病治疗过程中推行基本药物制度所面临的困难,提出相关建议。结果与结论近年来,我国慢性疾病患病率持续上升。应根据我国人群疾病谱的变化,调整、增加治疗慢性疾病的基本药物品种;完善基本药物招标采购机制;建立科学的基本药物监管和评价体系;提高基本药物中慢性疾病治疗品种的统筹支付水平,以便加强基本药物制度在慢性疾病治疗中的作用。

关键词：基本药物制度慢性疾病合理用药