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首页> 外文期刊>Journal of industrial and engineering chemistry >Commercial catalysts screening for the direct amination of cyclohexanol
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Commercial catalysts screening for the direct amination of cyclohexanol

机译：用于筛选环己醇的直接胺化的商业催化剂

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Two groups of commercially available Niand Pd-based catalysts were used for the direct amination of cyclohexanol (CHOL) with NH3 as aminating agent and in the presence of H-2, aiming the selective production of cyclohexylamine (CHA) and aniline. The fresh catalysts were characterized in terms of metal loading, support composition (prevailing SiO2 and Al2O3) and metallic dispersion. Ni-based catalysts revealed to be highly active while Pd-based were more selective towards aniline, however requiring higher temperatures and catalyst loading to reach significant CHOL conversions (from 17 up to 67 %). The activity of the catalysts is intrinsically related to their metallic dispersion regardless the metal loading. The Ni-based catalyst with 46 wt. % of Ni is the most promising once it presents higher turnover frequency (TOF) values, as 10 fold high, particularly related to the ratio of desired to undesired byproducts. Moreover, operating conditions considerably affect catalysts' performance. (c) 2020 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
机译：以NH3为胺化剂，在H-2存在下，使用两组市售的Nian和Pd基催化剂对环己醇（CHOL）进行直接胺化反应，旨在选择性地生产环己胺（CHA）和苯胺。根据金属负载量、载体组成（主要的SiO2和Al2O3）和金属分散性对新鲜催化剂进行了表征。镍基催化剂显示出很高的活性，而钯基催化剂对苯胺的选择性更高，但是需要更高的温度和催化剂负载才能达到显著的CHOL转化率（从17%到67%）。催化剂的活性本质上与其金属分散性有关，而与金属负载量无关。镍含量为46%（重量百分比）的镍基催化剂是最有希望的，因为其具有更高的周转频率（TOF）值，高达10倍，特别是与所需副产品和不需要副产品的比率有关。此外，操作条件对催化剂的性能有很大影响。（c） 2020年，韩国工业和工程化学学会。由爱思唯尔B.V.出版。版权所有。

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