催化精馏技术的进展概况

对催化精馏过程的进展进行了综述。介绍了催化精馏塔、催化剂的装填方式、催化精馏塔数学模型的研究现状。     

催化精馏技术研究进展

对催化精馏技术的研究进展进行了论述,重点讨论了催化剂的装填方式、催化精馏数学模型及解法的研究现状,并对该技术应用现状进行了总结.分析指出了该技术领域目前研究的热点和未来的发展趋势.     

催化精馏塔装填方式的研究进展

综述了催化精馏塔催化剂的 4种装填方式 ,即板式塔装填方式、填充式装填方式、悬浮式装填方式和催化剂散装填料的技术进展 ,介绍了这些方式的优缺点及适用范围 ,提出了装填方式的发展趋势。     

浅谈催化精馏技术及其研究进展

叙述了催化精馏技术的概念、优点及其作用原理,简单介绍了催化精馏技术中催化精馏塔的类型、催化剂的种类及其装填方式以及催化精馏技术在酯化、醚化、异构化、烷基化等方面的应用,以及近年来研发的一些新技术。     

国内催化精馏技术研究进展及应用

介绍了国内催化精馏技术在催化精馏塔、催化剂和数学模型方面的研究进展及其工业应用情况。     

催化精馏技术

本文介绍了催化粗馏技术的特点及其国内外开发应用概况。     

催化精馏技术及其应用进展

叙述了催化精馏技术的原理和催化精馏塔的结构,重点介绍了板式塔装填、填充式装填、悬浮式装填和催化剂散装四种催化剂填料方式,阐述了催化精馏技术在酯化反应、水解反应、烷基化反应和其他反应中的应用,对催化精馏技术的发展进行了总结.     

催化精馏技术的应用

综述了国内外催化精馏发展状况，介绍了催化精馏在芳烃烷基化，加氢，酯化和水解反应，甲缩醛的合成，三废处理等化工过程中的工艺流程及其与传统工艺相比所具有的优势，并进一步阐明催化精馏现存在的问题和解决思路。     

催化精馏技术在石油化工中的应用

石油化工对于国家的健康发展具有重要意义,是经济飞速发展的重要助推剂。而近些年我国正处于经济高速发展的关键时期,因此应确保石油化工业的稳定与健康发展十分关键。催化精馏技术是石油化工业最常见的科技技术,主要对该技术的应用进行探讨。     

反应精馏技术的研究进展

针对国内外反应精馏技术及其应用的最新研究情况,较全面地归纳和分析了反应精馏工艺的研究进展,并介绍了SYNTHESISER、ASPEN PLUS等计算机模拟软件在反应精馏工艺的应用情况。     

催化精馏技术在烷基化反应中的应用

介绍了催化精馏技术在烷基化反应中的应用,特别在基本有机化工原料生产中,如乙苯、异丙苯、直链烷基苯生产中的应用,提高了反应的转化率、原料利用率和产品选择性。对当前催化精馏现状进行了讨论,并对催化精馏研究前景进行了展望。     

Determination of catalytic packing characteristics for reactive distillation

Catalytic distillation still expands its field of applications. New structured catalytic column internals have been developed in recent years and new studies have been reported. A modern structured catalytic packing MULTIPAK^® is a subject of the investigations presented in this paper.

Important parameters of MULTIPAK^® have been examined experimentally in a 250 mm ID laboratory column: pressure drop for dry, prewetted and irrigated packings, flooding line and mass transfer coefficients for the gas and liquid phases.

The correlations obtained have been incorporated into a software tool for the simulation of catalytic distillation processes and simulations have been performed assuming methyl acetate synthesis as a model process. The calculations have been verified using the experiments performed for the same synthesis in a 50 mm ID catalytic distillation column operating continuously and thus reflecting industrial applications. It is concluded that the model represents the real process with satisfactory accuracy, although some deviations can be observed, especially within the reactive zone.     

催化蒸馏技术的应用进展

综述了催化蒸馏技术的应用进展情况，介绍了催化蒸馏技术的特点及装填方式，并从醚化、酯化，烷基化、缩合等几个方面简要叙述了近年来催化蒸馏技术的应用与发展。     

C3馏份选择加氢催化精馏工艺及其催化剂的研究

对C3馏份选择加氢催化剂及工艺条件进行了研究,试验结果表明,含有3.17%(物质的量的含量)丙炔和丙二烯的C3馏份经催化精馏加氢,塔顶C3馏份中的炔烃、二烯烃可脱至≤10μg/g,丙烯收率≥102%。经262h考核,催化剂仍保持良好的活性和选择性。     

Synthesis of methylal by catalytic distillation

Methylal is an important raw material and an excellent solvent in industry. The conventional methods for the synthesis of methylal have drawbacks such as corrosion to the equipments, catalyst isolation, high molar ratio of methanol to formaldehyde and high cost of equipments. To overcome these drawbacks, the synthesis of methylal was investigated in a pilot scale catalytic distillation column using Sulzer BX and the structured catalytic packing Katapak-SP 12 in the present study. The reaction was catalyzed by polystyrene based macroporous cation exchange resin (D72) which was filled in the catalystic layers of the structured packings. The effects of operating parameters such as reflux ratio, total feed rate, molar ratio of methanol to formaldehyde, catalyst weight, aqueous formaldehyde concentration were studied experimentally. The appropriate operating parameters obtained in the present study include: reflux ratio is 5; total feed rate is 3.10 kg/h; molar ratio of methanol to formaldehyde is 2.5, catalyst weight is 0.51 kg, aqueous formaldehyde concentration is 35.3%. Under the above operating conditions the average conversion of formaldehyde is 99.6% while the average methylal purity is 92.1%. In order to achieve higher purity of methylal at the top of the column, two different configurations: feeding aqueous formaldehyde and feeding water at mid-way of rectifying section, was tried in the experiments. The experimental results show that the former configuration surpasses the latter, under which the average conversion of formaldehyde is 99.8% and the average methylal purity is 99.1%.     

膜蒸馏技术研究及应用进展

膜蒸馏作为一种新型分离技术,具有操作温度低、设备简单、脱盐率高等特点,在海水淡化、苦咸水脱盐、果汁浓缩等过程具有良好的应用前景。本文简述了膜蒸馏的工作原理、特点和膜材料的制备方法,指出当前膜材料的研究方向。综述了直接接触式、气隙式、真空式和气扫式4种基本膜蒸馏形式和几种改进的膜蒸馏形式的传热传质原理、研究现状和发展方向。重点介绍了可再生能源以及工业低温余热驱动膜蒸馏的技术特点、研究现状和应用,包括太阳能光伏/光热驱动膜蒸馏技术、太阳能热泵耦合驱动膜蒸馏技术、太阳池膜蒸馏技术、地热能梯级利用驱动膜蒸馏技术和低温余热驱动膜蒸馏技术等,并指出其发展方向。最后,探讨了膜蒸馏技术亟待研究和解决的问题,为该技术的进一步发展提供参考。     

Investigation on catalytic distillation for ethyl acetate production with different catalytic packing structures

The catalytic packing is the core component of the catalytic distillation, and how the catalyst exists in the packing has significant influence on the process. To investigate the effect of catalyst packings on the catalytic distillation process, the classical ethyl acetate reactive distillation system was utilized, and a supported catalytic packing(SCP) was prepared in comparison with the conventional tea-bag catalytic packing(TBP). Laboratory scale experiments showed that the ethyl acetate conv...     

Sensitivity analysis of a light gas oil deep hydrodesulfurization process via catalytic distillation

In this work, a sensitivity analysis of a light gas oil deep hydrodesulfurization catalytic distillation column is presented. The aim is to evaluate the effects of various parameters and operating conditions on the organic sulfur compound elimination by using a realistic light gas oil fraction. The hydrocarbons are modeled using pseudocompounds, while the organic sulfur compounds are modeled using model compounds, i.e., dibenzothiophene (DBT) and 4,6-dimethyl dibenzothiophene (4,6-DMDBT). These are among the most refractive sulfur compounds present in the oil fractions. A sensitivity analysis is discussed for the reflux ratio, bottom flow rate, condenser temperature, hydrogen and gas oil feed stages, catalyst loading, the reactive, stripping, and rectifying stages, feed disturbances, and multiple feeds. The results give insight into the qualitative effect of some of the operating variables and disturbances on organic sulfur elimination. In addition, they show that special attention must be given to the bottom flow rate and LGO feed rate control.     

乙酸甲酯的催化精馏水解实验研究

在自行设计的催化精馏塔中,以Amberlyst 35wet阳离子交换树脂为催化剂,全回流操作下,对乙酸甲酯催化精馏水解进行了研究。考察了空速、塔高度、回流进料比(体积比)以及进料中水酯物质的量比等操作条件对水解反应的影响。实验结果表明,在空速0.09 min-1,催化剂装填高度80 cm,提馏段7块塔板,回流进料比5∶1,进料中水酯物质的量比6.5∶1时,乙酸甲酯水解率达到83.5%。