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学者姓名:王碧玉
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Abstract :
通过研究不同种类钯催化剂[Pd(dppf)2Cl2,Pd(OAc)2,Pd(PPh3)4]、碱(Na2CO3,Na HCO3,K2CO3,K3PO4,Cs2CO3,Cs F)、溶剂(DME/H2O,DMF/H2O,Dioxane/H2O)及温度(70,80,100℃)对5-溴-3-叔丁基水杨醛与吡啶-4-硼酸制备5-(4-吡啶)-3-叔丁基水杨醛化合物的Suzuki偶联反应的影响,开发出一种高效催化吸或供电子基取代的芳基硼酸与吸电子基取代的溴代芳烃的偶联反应的方法,该反应在Pd(PPh3)4,K2CO3,Dioxane/H2O(V∶V=4∶1)、80℃的条件下产率达到97%,且具有分离简单、重...
Keyword :
Suzuki偶联反应 Suzuki偶联反应 催化机理 催化机理 吡啶硼酸 吡啶硼酸 溴代芳烃 溴代芳烃
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GB/T 7714 | 王碧玉 , 倪沛钟 , 范吉理 et al. 钯催化溴代水杨醛与吡啶硼酸的Suzuki交叉偶联反应 [J]. | 有机化学 , 2014 , 34 (12) : 2471-2477 . |
MLA | 王碧玉 et al. "钯催化溴代水杨醛与吡啶硼酸的Suzuki交叉偶联反应" . | 有机化学 34 . 12 (2014) : 2471-2477 . |
APA | 王碧玉 , 倪沛钟 , 范吉理 , 郑辉东 , 赵素英 , 白正帅 . 钯催化溴代水杨醛与吡啶硼酸的Suzuki交叉偶联反应 . | 有机化学 , 2014 , 34 (12) , 2471-2477 . |
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The synthesis of 3-tert-butyl-2-hydroxy-5-(pyridin-4-yl)benzaldehyde by Suzuki cross coupling reaction of 5-bromo-3-tert-butyl-2-hydroxybenzaldehyde with pyridin-4-ylboronic acid was studied by using different catalysts [Pd(dppf)(2)Cl-2, Pd(OAc)(2) and Pd(PPh3)(4)], bases (Na2CO3, NaHCO3, K2CO3, K3PO4, Cs2CO3 and CsF) and solvents (DME/H2O, DMF/H2O and dioxane/H2O) under different temperature of 70, 80 and 100 degrees C. A compatible method was developed for the coupling reaction of arylboronic acids (having electron donating or withdrawing group) with aryl bromides (having electron withdrawing group). Under the condition of Pd(PPh3)(4), K2CO3, dioxane/H2O (V : V=4 : 1), 80 degrees C, the yield is excellent (97%) and the product separation is easy. The compatibility for aryl bromides with electron donating group is moderate.
Keyword :
aryl bromide aryl bromide catalytic mechanism catalytic mechanism pyridylboronic acid pyridylboronic acid Suzuki cross coupling reaction Suzuki cross coupling reaction
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GB/T 7714 | Wang Biyu , Ni Peizhong , Fan Jili et al. Pd-Complex Catalyzed Suzuki Cross-Coupling Reaction of Brominated Salicylaldehyde with Pyridylboronic Acid [J]. | CHINESE JOURNAL OF ORGANIC CHEMISTRY , 2014 , 34 (12) : 2471-2477 . |
MLA | Wang Biyu et al. "Pd-Complex Catalyzed Suzuki Cross-Coupling Reaction of Brominated Salicylaldehyde with Pyridylboronic Acid" . | CHINESE JOURNAL OF ORGANIC CHEMISTRY 34 . 12 (2014) : 2471-2477 . |
APA | Wang Biyu , Ni Peizhong , Fan Jili , Zheng Huidong , Zhao Suying , Bai Zhengshuai . Pd-Complex Catalyzed Suzuki Cross-Coupling Reaction of Brominated Salicylaldehyde with Pyridylboronic Acid . | CHINESE JOURNAL OF ORGANIC CHEMISTRY , 2014 , 34 (12) , 2471-2477 . |
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The saturated vapor pressures of a series of a-pinene derivatives including camphene, isobornyl acetate, (+/-)-limonene, dihydromyrcenol, pinane, and dihydromyrcene were determined at the pressure ranging from (0.8 to 50.0) kPa by the boiling point method. Good agreement of the correlated values was obtained when the experimental data of vapor pressure and temperature were correlated by the Antoine equation, and the parameters A, B, and C were estimated. The molar enthalpies of vaporization Delta H-vap(m) of these compounds were estimated within the experimental temperature range by the Clausius-Clapeyron equation. Furthermore, the reliability of regressed parameters obtained from the Antoine equation in the range of experimental data was verified.
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GB/T 7714 | Wang, YingShu , Huang, NaRu , Xu, BingHui et al. Measurement and Correlation of the Vapor Pressure of a Series of alpha-Pinene Derivatives [J]. | JOURNAL OF CHEMICAL AND ENGINEERING DATA , 2014 , 59 (2) : 494-498 . |
MLA | Wang, YingShu et al. "Measurement and Correlation of the Vapor Pressure of a Series of alpha-Pinene Derivatives" . | JOURNAL OF CHEMICAL AND ENGINEERING DATA 59 . 2 (2014) : 494-498 . |
APA | Wang, YingShu , Huang, NaRu , Xu, BingHui , Wang, BiYu , Bai, ZhengShuai . Measurement and Correlation of the Vapor Pressure of a Series of alpha-Pinene Derivatives . | JOURNAL OF CHEMICAL AND ENGINEERING DATA , 2014 , 59 (2) , 494-498 . |
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本发明公开了一种Mn(Ⅲ)-Salen催化剂及其制备方法与应用,是以5-溴-3-叔丁基水杨醛与吡啶-4-硼酸为原料,反应生成的吡啶水杨醛衍生物,再与乙二胺通过反应合成具有吡啶官能团的Salen配体,最后将二价锰盐与Salen配体先配位后氧化,所得反应液经蒸干、水洗、过滤后得到所述Mn(Ⅲ)-Salen催化剂。本发明反应体系简单,试剂容易获得且成本低,反应产品后处理过程简单,产品纯度高,所得Mn(Ⅲ)-Salen催化剂对水和空气稳定,并能以较高活性、较高选择性催化苯乙烯、4-叔丁基苯乙烯、茚、α-甲基苯乙烯等合成烯烃环氧化物。
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GB/T 7714 | 白正帅 , 倪沛钟 , 范吉理 et al. 一种Mn(Ⅲ)-Salen催化剂及其制备方法与应用 : CN201410286555.7[P]. | 2014/6/25 . |
MLA | 白正帅 et al. "一种Mn(Ⅲ)-Salen催化剂及其制备方法与应用" : CN201410286555.7. | 2014/6/25 . |
APA | 白正帅 , 倪沛钟 , 范吉理 , 赵素英 , 王碧玉 . 一种Mn(Ⅲ)-Salen催化剂及其制备方法与应用 : CN201410286555.7. | 2014/6/25 . |
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本发明公开了一种乙酸异龙脑酯连续皂化制备异龙脑的方法,以氢氧化钠和乙酸异龙脑酯为原料,经皂化、精馏、分层、水洗、结晶等步骤制备出白色异龙脑晶体。其皂化反应可在振荡流反应器、静态混合器或超声混合器中实现连续操作;反应中加入极性溶剂,使皂化反应在均相中进行,可缩短反应时间,降低反应温度,其乙酸异龙脑酯的转化率在99%以上,产品收率95%以上,说明该方法生产能耗低,产品收率高。
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GB/T 7714 | 郑辉东 , 胡以超 , 严佐毅 et al. 一种乙酸异龙脑酯连续皂化制备异龙脑的方法 : CN201410805472.4[P]. | 2014/12/23 . |
MLA | 郑辉东 et al. "一种乙酸异龙脑酯连续皂化制备异龙脑的方法" : CN201410805472.4. | 2014/12/23 . |
APA | 郑辉东 , 胡以超 , 严佐毅 , 王碧玉 . 一种乙酸异龙脑酯连续皂化制备异龙脑的方法 : CN201410805472.4. | 2014/12/23 . |
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本发明属化工领域,具体公开了一种3,4-二氯溴苯的制备方法。本发明以邻二氯苯为原料,在邻二氯苯中添加还原铁粉,于一定压力和温度下通入溴水在溴化釜内进行溴化反应。对溴化反应后的3,4-二氯溴苯粗品进行溶液多级结晶,提纯3,4-二氯溴苯。至少采用一级,一般是多级,级数可在1到3之间变动,以形成完整的3,4-二氯溴苯产品结晶精制的循环。本发明有益效果主要体现在:以邻二氯苯制备3,4-二氯溴苯过程中的副产物2,3-二氯溴苯为溶剂,产品不会被外来溶剂或其他材料污染,尤其考虑到精馏高温导致2,3-二氯溴苯副反应加剧,使3,4-二氯溴苯收率降低,具有产品收率高、纯度好、生产效率高的特点。
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GB/T 7714 | 郑辉东 , 赵素英 , 吴丹 et al. 一种3,4-二氯溴苯的制备方法 : CN201410133178.3[P]. | 2014/4/4 . |
MLA | 郑辉东 et al. "一种3,4-二氯溴苯的制备方法" : CN201410133178.3. | 2014/4/4 . |
APA | 郑辉东 , 赵素英 , 吴丹 , 王碧玉 . 一种3,4-二氯溴苯的制备方法 : CN201410133178.3. | 2014/4/4 . |
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从概率论角度出发,利用传统的Galton板模型,以催化剂捆扎包内的一个小布袋为研究对象,建立了固定床内示踪剂浓度分布模型,得到了固定床内示踪剂浓度分布模型的具体表达式。同时,以KCl溶液为示踪剂,建立了实验装置,将模型计算值与实验结果比较,结果吻合良好,说明所建模型是可靠的。考察不同参数对示踪剂浓度分布的影响,结果表明:在固定床内,随着催化剂粒径的增大、液体喷淋量的减小、固定床高度的增加,示踪剂浓度分布曲线逐渐变得平缓。
Keyword :
Galton板 Galton板 固定床 固定床 浓度分布 浓度分布
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GB/T 7714 | 王碧玉 , 黄智贤 , 郑辉东 et al. 基于Galton板的固定床内示踪剂浓度分布 [J]. | 化工学报 , 2013 , 64 (12) : 4283-4289 . |
MLA | 王碧玉 et al. "基于Galton板的固定床内示踪剂浓度分布" . | 化工学报 64 . 12 (2013) : 4283-4289 . |
APA | 王碧玉 , 黄智贤 , 郑辉东 , 邱挺 . 基于Galton板的固定床内示踪剂浓度分布 . | 化工学报 , 2013 , 64 (12) , 4283-4289 . |
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Based on the theory of probability, with a small cloth bag in the catalyst bound as the study object, the model of tracer concentration distribution in the fixed bed was established using the traditional Galton board model, and the expression of the concentration distribution model in the fixed bed was obtained. The experimental setup was established using KCl solution as the tracer and the experimental results were compared with the model predicted values. The experimental value fitted well with the model predicted value. The influences of different parameters on concentration distribution in the fixed bed were analyzed. The trace concentration distribution curve gradually became gentle with increasing catalyst particle size and increasing height of the fixed bed but decreasing liquid spray quantity. © All Rights Reserved.
Keyword :
Catalysts Catalysts Chlorine compounds Chlorine compounds Microchannels Microchannels Particle size Particle size Potassium compounds Potassium compounds Probability distributions Probability distributions
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GB/T 7714 | Wang, Biyu , Huang, Zhixian , Zheng, Huidong et al. Tracer concentration distribution in fixed bed based on Galton board [J]. | CIESC Journal , 2013 , 64 (12) : 4283-4289 . |
MLA | Wang, Biyu et al. "Tracer concentration distribution in fixed bed based on Galton board" . | CIESC Journal 64 . 12 (2013) : 4283-4289 . |
APA | Wang, Biyu , Huang, Zhixian , Zheng, Huidong , Qiu, Ting . Tracer concentration distribution in fixed bed based on Galton board . | CIESC Journal , 2013 , 64 (12) , 4283-4289 . |
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Recovery of copper ions from wastewater using a hollow fiber supported emulsion liquid membrane (HFSELM) was studied with LIX984N as carrier, kerosene as diluents, and sulfuric acid solution as stripping phase. Effects of compositions of feed and emulsion liquid phase, flow rates on both sides of membrane, and hollow fiber module parameters were investigated. The stability of the emulsion liquid phase without surfactant and the effect of buffer in the feed phase on the extraction rate were also evaluated. It is found that the stability of the emulsion phase without surfactant is poor. Higher flow velocity gives shorter residence time for the emulsion liquid phase on the tube side, reducing the effect of particle coalescence on the separation process. The extraction rate increases with the increase of feed phase pH, carrier concentration, hydrogen ion concentration in the stripping phase, and effective hollow fiber area. The phase ratio in the emulsion liquid phase has a negative effect on extraction rate. The flow rates on both sides have little influence on the extraction performance of the HFSELM, while buffer addition in the feed solution improves the extraction efficiency.
Keyword :
copper ion copper ion extraction rate extraction rate hollow fiber hollow fiber supported emulsion liquid membrane supported emulsion liquid membrane
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GB/T 7714 | Zheng Huidong , Chen Jingjing , Wang Biyu et al. Recovery of Copper Ions from Wastewater by Hollow Fiber Supported Emulsion Liquid Membrane [J]. | CHINESE JOURNAL OF CHEMICAL ENGINEERING , 2013 , 21 (8) : 827-834 . |
MLA | Zheng Huidong et al. "Recovery of Copper Ions from Wastewater by Hollow Fiber Supported Emulsion Liquid Membrane" . | CHINESE JOURNAL OF CHEMICAL ENGINEERING 21 . 8 (2013) : 827-834 . |
APA | Zheng Huidong , Chen Jingjing , Wang Biyu , Zhao Suying . Recovery of Copper Ions from Wastewater by Hollow Fiber Supported Emulsion Liquid Membrane . | CHINESE JOURNAL OF CHEMICAL ENGINEERING , 2013 , 21 (8) , 827-834 . |
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The isobaric VLE data for three binary systems (DHM + pinane, DHM + DHMOH, pinane + DHMOH) and one ternary system (pinane + DHM + DHMOH) at 6 kPa were measured with a Rose-Williams still. The binary VLE data were correlated with the Wilson and NRTL models. With the obtained model parameters, the ternary (pinane + DHM + DHMOH) VLE data was predicted and compared with the experimental data and the result shows that the parameters also have a good performance in the prediction of the ternary VLE data. (c) 2013 Elsevier B.V. All rights reserved.
Keyword :
Dihydromyrcene Dihydromyrcene Dihydromyrcenol Dihydromyrcenol Pinane Pinane Vapor-liquid equilibrium Vapor-liquid equilibrium
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GB/T 7714 | Wang, Yingshu , Guo, Chuan , Liu, Xiaoqin et al. Isobaric vapor-liquid equilibrium (VLE) for pinane, dihydromyrcene (DHM) and dihydromyrcenol (DHMOH) at 6 kPa [J]. | FLUID PHASE EQUILIBRIA , 2013 , 342 : 47-51 . |
MLA | Wang, Yingshu et al. "Isobaric vapor-liquid equilibrium (VLE) for pinane, dihydromyrcene (DHM) and dihydromyrcenol (DHMOH) at 6 kPa" . | FLUID PHASE EQUILIBRIA 342 (2013) : 47-51 . |
APA | Wang, Yingshu , Guo, Chuan , Liu, Xiaoqin , Huang, Shuicheng , Wang, Biyu , Zheng, Huidong . Isobaric vapor-liquid equilibrium (VLE) for pinane, dihydromyrcene (DHM) and dihydromyrcenol (DHMOH) at 6 kPa . | FLUID PHASE EQUILIBRIA , 2013 , 342 , 47-51 . |
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