Catalytic activity dependence on morphological properties of acidic ion-exchange resins for the simultaneous ETBE and TAEE liquid-phase synthesis,Reaction Chemistry & Engineering

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Catalytic activity dependence on morphological properties of acidic ion-exchange resins for the simultaneous ETBE and TAEE liquid-phase synthesis
Reaction Chemistry & Engineering ( IF 3.4 ) Pub Date : 2018-01-24 00:00:00 , DOI: 10.1039/c7re00177k
R. Soto _{1,

2,

3,

4,

5} , C. Fité _{1,

2,

3,

4,

5} , E. Ramírez _{1,

2,

3,

4,

5} , M. Iborra _{1,

2,

3,

4,

5} , J. Tejero _{1,

2,

3,

4,

5}

Affiliation

The simultaneous liquid-phase synthesis of 2-ethoxy-2-methylpropane (ETBE) and 2-ethoxy-2-methylbutane (TAEE) has been studied over fifteen commercial acidic ion-exchange resins. Kinetic experiments were carried out in a batch reactor at T = 335 K and initial molar ratios of alcohol to olefins (R°_A/O) and between olefins (R°_C4/C5) of 1.1 and 1, respectively. The catalytic activity, measured as intrinsic initial etherification rates, has been found to decrease in the order: Amberlyst™ 35 > Amberlyst™ 48 > Purolite® CT-275 > Amberlyst™ 15 > Purolite® CT-175 > Amberlyst™ 40 > Amberlyst™ 36 > Amberlyst™ 16 > Purolite® CT-482 > Amberlyst™ 39 > Amberlyst™ DT > Amberlyst™ 45 > Purolite® CT-124 > Purolite® MN-500 > Amberlyst™ 46. This catalytic activity rank is related to the morphological properties of the resins in both dry and swollen states. The ratio of acid capacity to specific volume of the swollen polymer has been found to be the main catalyst properties that determine their activity: the higher the ratio, the higher the activity.

中文翻译：

ETBE和TAEE液相同时合成的酸性离子交换树脂的催化活性取决于其形态学特性

已经在十五种商业酸性离子交换树脂上研究了2-乙氧基-2-甲基丙烷（ETBE）和2-乙氧基-2-甲基丁烷（TAEE）的同时液相合成。在间歇式反应器中于T = 335 K上进行了动力学实验，醇与烯烃的初始摩尔比（R ° _{A / O}）和烯烃之间的初始摩尔比（R ° _{C4 / C5}）分别为1.1和1。已发现，以固有的初始醚化速率衡量的催化活性依次降低：Amberlyst™35> Amberlyst™48>Purolite®CT-275> Amberlyst™15>Purolite®CT-175> Amberlyst™40> Amberlyst™ 36> Amberlyst™16>Purolite®CT-482> Amberlyst™39> Amberlyst™DT> Amberlyst™45>Purolite®CT-124>Purolite®MN-500> Amberlyst™46。此催化活性等级与形态学特性有关处于干燥和膨胀状态的树脂。已经发现酸容量与溶胀聚合物的比体积的比率是决定其活性的主要催化剂性质：比率越高，活性越高。

更新日期：2018-01-24

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