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首页> 外文会议>3rd International Symposium on Reaction Kinetics and the Development and Operation of Catalytic Processes, Apr 22-25, 2001, Oostende, Belgium >A Study of a Phase Transfer Catalytic Reaction between N-Butyl Bromide and Sodium Phenolate in an Oscillatory Baffled Reactor
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A Study of a Phase Transfer Catalytic Reaction between N-Butyl Bromide and Sodium Phenolate in an Oscillatory Baffled Reactor

机译：振荡折流板反应器中N-丁基溴化物和酚钠相转移催化反应的研究

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The most basic form of a Phase Transfer Catalytic (PTC) reaction consists of two immiscible liquid phases each with a reagent that, until the introduction of a Phase Transfer Catalyst (PT-Cat), cannot react with each other. The PT-Cat manages to transfer one of the reagents from one phase to the other phase whereupon the second reagent can react with the catalyst-reagent transient. This paper presents our current investigation into the use of an Oscillatory Baffled Reactor (OBR) for a PTC reaction between n-butyl bromide (BuBr, with Toluene as the organic solvent) and sodium phenolate (NaOPh, dissolved in water) with tetrabutylammonium bromide (QBr) as the catalyst. The OBR consists of a cylindrical column containing periodically placed orifice baffles together with superimposing fluid oscillation. The OBR is of 25 mm in diameter and 140 mm in length, and is operated vertically. The oscillating fluid motion in the OBR interacts with each baffle to form vortices, which gives efficient and uniform mixing between each baffled cavity. It has been known that PTC process development remains - almost exclusively - a chemistry based field, and has not yet been examined with chemical engineering principles. This work is the first of its kind. Industrial applications of PTC are concentrated upon the manufacture of Fine Chemicals and Organic Intermediates. Recent reviews identify the potential of PTC in these fields as 'almost unlimited'. The reasons for such an endorsement are the advantages of cost and environmental friendliness that PTC enjoys over existing technologies. In this paper, we examined the effects of oscillation amplitude and frequency on the reaction rate and conversion of the PTC reaction, and compared the results with those carried out in a Continuously Stirred Tank Reactor (STR). Our preliminary results show that the OBR promotes improved reaction rates and conversion at lower power requirements.
机译：相转移催化（PTC）反应的最基本形式是由两个不混溶的液相组成，每个液相均与一种试剂接触，直到引入相转移催化剂（PT-Cat）之前，它们都无法相互反应。 PT-Cat设法将一种试剂从一相转移到另一相，于是第二种试剂便可以与催化剂-试剂瞬变反应。本文介绍了我们目前使用的振荡折流板反应器（OBR）在正丁基溴化物（BuBr，以甲苯为有机溶剂）和酚酸钠（NaOPh，溶于水）与四丁基溴化铵（ QBr）作为催化剂。 OBR由一个圆柱体组成，该圆柱体包含周期性放置的孔挡板以及叠加的流体振荡。 OBR的直径为25毫米，长度为140毫米，并且可以垂直操作。 OBR中的振荡流体运动与每个折流板相互作用形成涡流，从而在每个折流板腔之间产生有效且均匀的混合。众所周知，PTC的工艺开发几乎始终是基于化学的领域，并且尚未经过化学工程原理的检验。这项工作是同类工作中的第一项。 PTC的工业应用集中在精细化学品和有机中间体的制造上。最近的评论将PTC在这些领域的潜力确定为“几乎无限”。这样做的原因是PTC与现有技术相比具有成本优势和对环境友好的优势。在本文中，我们检查了振荡幅度和频率对PTC反应速率和转化率的影响，并将结果与​​在连续搅拌釜反应器（STR）中进行的结果进行了比较。我们的初步结果表明，OBR在较低的功率要求下可提高反应速度和转化率。

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