检索结果-南通市图书馆

Reactive dividing-wall column for the co-production of ethyl acetate and n-butyl acetate

Chinese Journal of Chemical Engineering 2019年第1期27卷 136-143页

作者： Hongshi Li Tong Li Chunli Li Jing Fang Lihui Dong national-Local Joint Engineering Laboratory for Energy Conservation of Chemical Process Integration and Resources Utilization Hebei University of Technology

Reactive dividing-wall column(RDWC) technology plays a critical role in the energy saving and high efficiency of chemical *** this article, the process of co-producing ethyl acetate(EA) and n-butyl acetate(BA) with RDWC was *** was not only the product, but also acted as entrainer to remove the water generated by the two esterification *** and simulations of the co-production process were carried *** was found that the experimental results were in good agreement with the simulation *** kinds of RDWC structures(RDWC-FC and RDWC-RS) were proposed, and the co-production process operating parameters of the two types of RDWC were optimized by Aspen Plus *** optimal operating parameters of the RDWC-FC were determined as follows: 0.6 of the reflux ratio of aqueous phase(RR), 0.66 of the vapor split(R_V) and 0.51 of the liquid split(R_L).And the optimal operating parameters of the RDWC-RS were shown as follows: RR was 0.295 and R_V was ***, the energy saving analysis of the co-production process was based on the annual output of 10000 tons of EA, compared with the traditional reaction distillation(RD) to prepare EA and BA, the reboiler duty of the RDWC-FC column could save 20.4%, TAC saving 23.6%; RDWC-RS reboiler energy consumption could save 17.0%, TAC 22.2%.

关键词： Reactive dividing-wall columns Ethyl acetate n-butyl acetate Coproduction Energy-saving

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Vapor Pressure, Vaporization Enthalpy, Standard Enthalpy of Formation and Standard Entropy of n-butyl Carbamate

引用

Chinese Journal of Chemical Engineering 2014年第10期22卷 1145-1152页

作者：曾作祥杨志红薛为岚李晓楠 Institute of Chemical Engineering East China University of Science and Technology

The vapor pressures of n-butyl carbamate were measured in the temperature range from 372.37 K to 479.27 K and fitted with Antoine equation. The compressibility factor of the vapor was calculated with the Virial equation and the second virial coefficient was determined by the Vetere model. Then the standard enthalpy of vaporization for n-butyl carbamate was estimated. The heat capacity was measured for the solid state(299.39–324.2 K) and liquid state(336.65–453.21 K) by means of adiabatic calorimeter. The standard enthalpy of formation ΔfH[crystal(cr),298.15 K] and standard entropy S(crystal,298.15 K) of the substance were calculated on the basis of the gas-phase standard enthalpy of formation ΔfH(g,298.15 K)and gas-phase standard entropy S(g,298.15 K), which were estimated by the Benson method. The results are acceptable, validated by a thermochemical cycle.

关键词： n-butyl carbamate Vapor pressure Standard enthalpy of formation Standard entropy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Safety of bronchial arterial embolization with n-butyl cyanoacrylate in a swine model

引用

World Journal of Radiology 2012年第12期4卷 455-461页

作者： Takami Tanaka nobuyuki Kawai Morio Sato Akira Ikoma Kouhei nakata Hiroki Sanda Hiroki Minamiguchi Motoki nakai Tetsuo Sonomura Ichiro Mori Department of Radiology Wakayama Medical University 811-1 Kimiidera Wakayamashi Wakayama 641-8510 Japan Department of 2nd Pathology Wakayama Medical University 811-1 Kimiidera Wakayamashi Wakayama 641-8510 Japan

AIM: To compare the efficacy and safety of bronchial artery embolization (BAE) with n-butyl cyanoacrylate (nBCA) and gelatin sponge particles (GSPs). METHODS: Six healthy female swine were divided into two groups to be treated with BAE using nBCA-lipiodol (nBCA-Lp) and using GSPs. The occlusive durability, the presence of embolic materials, the response of the vessel wall, and damage to the bronchial wall and pulmonary parenchyma were compared. RESULTS: no animals experienced any major complication. Two days later, no recanalization of the bronchial artery was observed in the nBCA-Lp group, while partial recanalization was seen in the GSP group. Embolic materials were not found in the pulmonary artery or pulmonary vein. nBCA-Lp was present as a bubble-like space in bronchial branch arteries of 127-1240 μm, and GSPs as reticular amorphous substance of 107-853 μm. These arteries were in the adventitia outside the bronchial cartilage but not in the fine vessels inside the bronchial cartilage. no damage to the bronchial wall and pulmonary parenchyma was found in either group. Red cell thrombus, stripping of endothelial cells, and infiltration of inflammatory cells was observed in vessels embolized with nBCA-Lp or GSP. COnCLUSIOn: nBCA embolization is more potent than GSP with regard to bronchial artery occlusion, and both materials were present in bronchial branch arteries≥100 μm diameter.

关键词： Bronchial artery embolization Embolic materials n-butyl cyanoacrylate Gelatin sponge Lipiodol

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

醋酸正丙酯与醋酸正丁酯的选择与探讨

引用

合成技术及应用 2013年第4期28卷 34-37页

作者：张海军中国石化仪征化纤股份有限公司PTA生产中心江苏仪征211900

在PTA装置中溶剂脱水正常采用两种方法:常规精馏和共沸精馏。从能耗和物耗以及方便操作的角度,通常选用共沸精馏,而采用共沸精馏时,共沸剂的选择是一个比较关键的因素。笔者从共沸剂的性能、消耗、能耗以及塔的选择方面进行了比较与探讨... 详细信息

在PTA装置中溶剂脱水正常采用两种方法:常规精馏和共沸精馏。从能耗和物耗以及方便操作的角度,通常选用共沸精馏,而采用共沸精馏时,共沸剂的选择是一个比较关键的因素。笔者从共沸剂的性能、消耗、能耗以及塔的选择方面进行了比较与探讨,为共沸精馏塔的共沸剂选择提供了一个参考。

关键词：对苯二甲酸(PTA) 共沸精馏醋酸正丙酯(nPA) 醋酸正丁酯(nBA) p-phthalic acid(PTA) n-Propyl acetate(nPA) n-butyl acetate(nBA)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Synthesis and Characterisation of Silver nanoparticles in Different Medium

引用

Open Journal of Synthesis Theory and Applications 2012年第2期1卷 13-17页

作者： G. Alagumuthu R. Kirubha Department of Chemistry Sri Paramakalyani College Manonmaniam Sundaranar University Alwarkurichi India

Silver nanoparticles were synthesized in different alcoholic medium such as ethylene glycol and n-butyl alcohol by solvothermal method. The nanoparticles have been successfully synthesized by reducing silver nitrate with the above solvents in the presence of trioctyl phosphine oxide (TOPO) as the capping agent at room temperature for 1 h. Electron microscopy, X-ray diffraction, and absorption spectra have been used to investigate the products, and the mechanism is proposed to interpret the controlled synthesis of the products. The results indicate that this approach provides a versatile route to prepare silver nanowires and nanoparticles with controllable diameters. The formation of nano products by this method is rapid, simple and stable.

关键词： Silver nanoparticles TOPO Ethylene Glycol n-butyl Alcohol

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：