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| Abstract: First steps of the development of a catalytic reactive distillation process for the production of n-propyl acetate based on experiments and simulations are proposed. The kinetics for homogeneously (sulphuric acid) and heterogeneously (Amberlyst 15) catalysed reaction were investigated and the constants for a pseudo-homogeneous model are presented. Pilot plant experiments were performed using a homogeneous strong acid catalyst in a packed column. A top-column decanter is used to withdraw the aqueous phase and to reflux the organic phase. Simulation results are in good agreement with experimental data. Thermodynamics nonidealities are taken into account using VLE and LLE NRTL interaction parameters. Alcohol conversion and n-propyl acetate purity may be dramatically increased just by adding to the pilot plant a stripping section in an additional column: six different configurations are identified to achieve such a production. The startup is studied in order to determine the best strategy to achieve steady-state conditions. The strong influence of the composition of the initial charging in the decanter can be seen and an initial charging of the two-phase top product leads to the fastest startup. |
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8814402
至尊木虫 (职业作家)
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【答案】应助回帖
宝MMC(金币+16, 翻译EPI+1): 谢谢 2011-05-23 14:02:46
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Abstract: First steps of the development of a catalytic reactive distillation process for the production of n-propyl acetate based on experiments and simulations are proposed. 摘要：基于实验和模拟，初步建立一个生产乙酸正丙酯的催化反应蒸馏过程。The kinetics for homogeneously (sulphuric acid) and heterogeneously (Amberlyst 15) catalysed reaction were investigated and the constants for a pseudo-homogeneous model are presented. 研究了均相（硫酸）和非均相（大孔树脂15）催化反应的动力学，提出假均相模式的参数。Pilot plant experiments were performed using a homogeneous strong acid catalyst in a packed column.在填充蒸馏塔中使用强酸性催化剂进行了中试。 A top-column decanter is used to withdraw the aqueous phase and to reflux the organic phase.柱顶安置玻璃烧瓶以抽取水相和回流有机相。 Simulation results are in good agreement with experimental data. 模拟与实验结果一致性很好。Thermodynamics nonidealities are taken into account using VLE and LLE NRTL interaction parameters. 使用VLE 和 LLE NRTL 相互作用参数考虑了热力学非理想性。Alcohol conversion and n-propyl acetate purity may be dramatically increased just by adding to the pilot plant a stripping section in an additional column: six different configurations are identified to achieve such a production. 在中试中，仅仅通过在附加柱上增加提馏段，就可以显著提高乙醇转化率和乙酸正丙酯的纯度。The startup is studied in order to determine the best strategy to achieve steady-state conditions. 研究了系统启动项以确定获得平衡态条件的最佳策略。The strong influence of the composition of the initial charging in the decanter can be seen and an initial charging of the two-phase top product leads to the fastest startup.烧瓶中的初加料的组成具有很大影响，双相顶端产物的初加料获得最快的启动。 专业名词不甚了了，请楼主按照专业准确理解。 |
3楼2011-05-23 09:13:17
liuliuxuan
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宝MMC(金币+5, 翻译EPI+1): 感谢您的回帖，虽不满足我的要求，但还是谢谢你的支持！ 2011-05-22 16:35:17
sltmac(金币-30, 翻译EPI-1): 机器翻译，请认真阅读应助需知，再犯将予以禁言处理，希望理解~~~ 2011-05-22 18:12:55
sltmac: 2011-05-22 18:13:06
宝MMC(金币+5, 翻译EPI+1): 感谢您的回帖，虽不满足我的要求，但还是谢谢你的支持！ 2011-05-22 16:35:17
sltmac(金币-30, 翻译EPI-1): 机器翻译，请认真阅读应助需知，再犯将予以禁言处理，希望理解~~~ 2011-05-22 18:12:55
sltmac: 2011-05-22 18:13:06
| 摘要：一个催化的N -丙基乙酸实验和模拟为主的生产发展的第一反应精馏过程的步骤提出建议。为均匀（硫酸）及异质性（Amberlyst 15）催化反应进行了研究和伪均质模型，提出的动力学常数。中试装置进行了实验中使用填充柱同质强酸催化剂。一顶柱滗水器是用来撤回水相和有机相回流。模拟结果与实验数据吻合。热力学非理想特性都考虑采用汽液平衡和LLE NRTL的相互作用参数帐户。酒精转化和n -丙基酯的纯度，可显着增加的时候，加入到试验厂在附加列剥离部分：确定六种不同的配置来实现这样的生产。研究的启动是为了确定最佳策略，以达到稳定状态的条件。该滗水器中的初始充电组成强大的影响力可以看出，一个两阶段初充电导致顶级产品以最快的启动 |
2楼2011-05-22 14:22:22
