Journal of The Chinese Institute of Chemical Engineers最新文献_第10页

Phase transition phenomena of the adsorbed 1-dodecanol monolayer at the air–water interface 吸附的1-十二醇单层在空气-水界面处的相变现象

Journal of The Chinese Institute of Chemical Engineers Pub Date : 2007-09-01 DOI: 10.1016/j.jcice.2007.06.003

Ping-Chieh Wu , Shi-Yow Lin , Ruey-Yug Tsay

{"title":"Phase transition phenomena of the adsorbed 1-dodecanol monolayer at the air–water interface","authors":"Ping-Chieh Wu , Shi-Yow Lin , Ruey-Yug Tsay","doi":"10.1016/j.jcice.2007.06.003","DOIUrl":"10.1016/j.jcice.2007.06.003","url":null,"abstract":"<div>Phase transition phenomenon of the 1-dodecanol monolayer at the air/water interface was studied by the dynamic γ(t) curves and the adsorption isotherm obtained by ellipsometry at 20°C. The surface-concentration adsorption isotherm clearly showed three abrupt increases at bulk concentration C of 1.3×10−9, 2×10−9 and 3.7×10−9 =2×10−9 <!-->mol/mL was not identified from any previous dynamic surface-tension profiles. Judging from the substantial increase in the film thickness of the transition, it was believed that the orientation change of the adsorbed molecule was involved in the LE phase. A LEh and a LEv phase, that denoted the “lie-down” and “stand-up” types of adsorption, respectively, was used to describe this transition and a cusp, instead of a constant surface-tension region, was observed in the dynamic γ(t) curves for this transition. This suggested that, since the surface tension varied during the transition process, the newly identified LEh and LEv transition might not be the typical first-order type of phase transition.</div>","PeriodicalId":17285,"journal":{"name":"Journal of The Chinese Institute of Chemical Engineers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.jcice.2007.06.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78919854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Index of Volume 38 第38卷索引

Journal of The Chinese Institute of Chemical Engineers Pub Date : 2007-09-01 DOI: 10.1016/S0368-1653(07)00115-3

引用次数: 0

Modified correction-factor analysis of solvent extraction in rectangular membrane modules 矩形膜组件溶剂萃取的修正校正因子分析

Journal of The Chinese Institute of Chemical Engineers Pub Date : 2007-09-01 DOI: 10.1016/j.jcice.2007.04.008

Ho-Ming Yeh

引用次数: 5

Operation and control of batch extractive distillation for the separation of mixtures with minimum-boiling azeotrope 间歇式萃取精馏分离低沸共沸混合物的操作与控制

Journal of The Chinese Institute of Chemical Engineers Pub Date : 2007-09-01 DOI: 10.1016/j.jcice.2007.08.004

Jyun-Yang Yao , Sheng-Yu Lin , I-Lung Chien

{"title":"Operation and control of batch extractive distillation for the separation of mixtures with minimum-boiling azeotrope","authors":"Jyun-Yang Yao , Sheng-Yu Lin , I-Lung Chien","doi":"10.1016/j.jcice.2007.08.004","DOIUrl":"10.1016/j.jcice.2007.08.004","url":null,"abstract":"<div>Batch distillation is commonly used in the fine chemicals, specialty polymer, biochemical, pharmaceutical, and food industries. For separating mixtures with minimum-boiling azeotrope, a heavy entrainer is frequently added to the top section of the batch column to aid in the separation. This process is called batch extractive distillation. Most of the papers in open literature have only studied the first operating step of the batch extractive distillation which is the recovery of the light component without mentioning the later steps for the recovery of the other component and entrainer. In this paper, two real chemical systems, one separating acetone and methanol using water as entrainer and the other separating isopropyl alcohol (IPA) and water using dimethyl sulfoxide (DMSO) as entrainer, are studied for the feasible operation of the complete batch distillation sequence. The operating variables, including the pre-load amount with the mixture, continuous feed rate of the entrainer, and reflux ratio at each operating step are determined in the operating sequence. The constant reflux ratio and constant entrainer feed rate operating policy and another policy to allow these two operating variables to be varied will be compared in order to further improve the batch operation. All dynamic simulations that are performed directly mimic industrial situations from an empty column using a rigorous dynamic simulator, Aspen Dynamics™.</div>","PeriodicalId":17285,"journal":{"name":"Journal of The Chinese Institute of Chemical Engineers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.jcice.2007.08.004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72933492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 36

Recoveries of deuterium from the separation of water–isotope mixture in batch-type thermal diffusion columns under unsteady-state operation 间歇式热扩散塔非稳态操作下水-同位素混合物分离中氘的回收

Journal of The Chinese Institute of Chemical Engineers Pub Date : 2007-09-01 DOI: 10.1016/j.jcice.2007.06.004

Ho-Ming Yeh

引用次数: 1

Absorption of carbon dioxide into aqueous PAA solution containing diethanolamine 将二氧化碳吸收到含有二乙醇胺的PAA水溶液中

Journal of The Chinese Institute of Chemical Engineers Pub Date : 2007-09-01 DOI: 10.1016/j.jcice.2007.06.001

Sang-Wook Park , Byoung-Sik Choi , Kwang-Joong Oh , Jae-Wook Lee

引用次数: 7

The 2006 summary of scientific productivity of chemical engineers in Taiwan 2006年台湾省化学工程师科学生产力总结

Journal of The Chinese Institute of Chemical Engineers Pub Date : 2007-09-01 DOI: 10.1016/j.jcice.2007.09.002

Ya-Ling Cheng , Bing-Hung Chen

引用次数: 2

Synthesis of an active quaternary phosphonium salt and its application to the Wittig reaction: Kinetic study 活性季铵盐的合成及其在Wittig反应中的应用——动力学研究

Journal of The Chinese Institute of Chemical Engineers Pub Date : 2007-09-01 DOI: 10.1016/j.jcice.2007.08.005

Maw-Ling Wang , Biing-Lang Liu , Shan-Je Lin

{"title":"Synthesis of an active quaternary phosphonium salt and its application to the Wittig reaction: Kinetic study","authors":"Maw-Ling Wang , Biing-Lang Liu , Shan-Je Lin","doi":"10.1016/j.jcice.2007.08.005","DOIUrl":"10.1016/j.jcice.2007.08.005","url":null,"abstract":"<div>The synthesis of liquid crystal methyl [4-(nonyloxy) styryl] benzoate was achieved in four stages. First, toluic acid [1] was brominated with N-bromosuccinimide in refluxing CCl4 to form 4-bromotoluic acid [2] (BTA); second, BTA was esterified with methanol in SOCl2/CH2Cl2 to afford methyl (4-bromomethyl) benzoate [3] (BME); third, BME was condensed with triphenylphosphine (PPh3) in CH2Cl2 to produce the active Wittig reagent methyl (4-methylbenzoate) triphenylphosphonium bromide [4] (MBPB) and fourth, MBPB reacted with 4-nonyloxybenzaldehyde to produce MNSB in high yield. Each of these four reactions was carried out in a separate homogeneous organic solution and the effects of the reaction conditions in each reaction as well as a kinetic model for each individual reaction were studied. Furthermore, the active reagent was applied to the reaction of 4-nonyloxybenzaldehyde (n-C9H19O(C6H4)CHO) to synthesise cis-(E) and trans-(Z)methyl[4-(nonyloxy)styryl]benzoate (n-C9H19(C6H4)CH<img>CH(C6H4)COOCH3) from a two-phase medium alkaline solution of NaOH/organic solvent. High conversion and high selectivity were obtained via this reaction.</div>","PeriodicalId":17285,"journal":{"name":"Journal of The Chinese Institute of Chemical Engineers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.jcice.2007.08.005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80026078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Multi-criteria fuzzy optimization for locating warehouses and distribution centers in a supply chain network 供应链网络中仓库和配送中心的多准则模糊优化

Journal of The Chinese Institute of Chemical Engineers Pub Date : 2007-09-01 DOI: 10.1016/j.jcice.2007.08.001

Cheng-Liang Chen , Tzu-Wei Yuan , Wen-Cheng Lee

引用次数: 66

Rich photoluminescence emission of SnO2–SiO2 composite aerogels prepared with a co-fed precursor sol–gel process 溶胶-凝胶法制备SnO2-SiO2复合气凝胶的富光致发光特性

Journal of The Chinese Institute of Chemical Engineers Pub Date : 2007-09-01 DOI: 10.1016/j.jcice.2007.05.002

Te-Yu Wei , Shih-Yuan Lu , Yu-Cheng Chang

{"title":"Rich photoluminescence emission of SnO2–SiO2 composite aerogels prepared with a co-fed precursor sol–gel process","authors":"Te-Yu Wei , Shih-Yuan Lu , Yu-Cheng Chang","doi":"10.1016/j.jcice.2007.05.002","DOIUrl":"10.1016/j.jcice.2007.05.002","url":null,"abstract":"<div>Tin oxide–silica composite aerogels were successfully prepared with a co-fed precursor sol–gel process. The crystallinity of the tin oxide nanoparticles, embedded in the mesoporous SiO2 network, was improved with increasing the post-reaction thermal treatment temperature. The composite aerogels exhibited a rich photoluminescence (PL) emission contributed by both SnO2 and SiO2. The PL peak of 346nm was from the near band edge emission of the tin oxide nanoparticles, and the ones located at 310 and 476nm were attributable to the oxygen deficiencies of the silica network. Three more emission peaks, 387, 432, and 522nm, were observed, with the 387nm peak contributed by the oxygen vacancies VO++, the 432nm peak by the Sn interstitials, and the 522nm peak by the oxygen vacancies VO+, respectively, of the tin oxide nanoparticles. The intensities of these three defect level emissions were found decreased, as compared to that of the near band edge emission, with increasing the post-reaction thermal treatment temperature as the tin oxide crystallinity improved.</div>","PeriodicalId":17285,"journal":{"name":"Journal of The Chinese Institute of Chemical Engineers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.jcice.2007.05.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77573725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13