邻环己烯-环己酮脱氢合成邻苯基苯酚高活性Pt-K/γ-Al2O3催化剂的制备

IF 3.1 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Chemical Research in Chinese Universities Pub Date : 2008-11-01 DOI:10.1016/S1005-9040(09)60015-5

Jie-lian DING, Ling LIN, Jian-dong XU, Chong-yu ZENG

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引用次数: 1

摘要

采用二次浸渍法制备了0.5%Pt-K/γ-Al2O3催化剂，用于邻环己烯-环己酮(二聚体)脱氢合成邻苯酚(OPP)。考察了K促进剂、煅烧条件和还原条件等催化剂制备参数的影响。结果表明，Pt/γ-Al2O3催化剂中添加K2SO4可显著提高OPP的选择性，其最佳质量分数为6%。Pt/γ-Al2O3催化剂在400 ~ 500℃氮气气氛中煅烧后，在相同温度下在氢气气氛中还原3 h，获得了较高的活性。在8000 h的中试过程中，二聚体的转化率和OPP的选择性均在99%以上和90%以上，均在0.5%Pt-6% K2SO4/γ-Al2O3催化剂上。

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Preparation of Highly Active Pt-K/γ-Al2O3 Catalyst for o-Phenylphenol Synthesis from o-Cyclohexenyl-cyclohexanone Dehydrogenation

0.5%Pt-K/γ-Al₂O₃ catalysts for the synthesis of o-phenylphenol(OPP) from o-cyclohexenyl-cyclohexanone (dimer) dehydrogenation were prepared by means of a two subsequent impregnation method. The effects of catalyst preparation parameters, such as K promoters, calcination, and reduction conditions, were investigated. The results showed that the addition of K₂SO₄ to Pt/γ-Al₂O₃ catalyst notably promoted the selectivity of OPP, and its optimum content was found to be 6% in mass fraction. The higher activity was obtained when Pt/γ-Al₂O₃ catalyst was calcined in nitrogen atmosphere at 400—500 °C and then reduced at the same temperature for 3 h in hydrogen atmosphere. The conversion of the dimer and the selectivity of OPP were always above 99% and 90%, respectively, over 0.5%Pt-6% K₂SO₄/γ-Al₂O₃ catalyst during the pilot scale test of 8000 h.

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来源期刊

Chemical Research in Chinese Universities 化学-化学综合

CiteScore

5.30

自引率

6.50%

发文量

152

审稿时长

3.0 months

期刊介绍： The journal publishes research articles, letters/communications and reviews written by faculty members, researchers and postgraduates in universities, colleges and research institutes all over China and overseas. It reports the latest and most creative results of important fundamental research in all aspects of chemistry and of developments with significant consequences across subdisciplines. Main research areas include (but are not limited to): Organic chemistry (synthesis, characterization, and application); Inorganic chemistry (bio-inorganic chemistry, inorganic material chemistry); Analytical chemistry (especially chemometrics and the application of instrumental analysis and spectroscopy); Physical chemistry (mechanisms, catalysis, thermodynamics and dynamics); Polymer chemistry and polymer physics (mechanisms, material, catalysis, thermodynamics and dynamics); Quantum chemistry (quantum mechanical theory, quantum partition function, quantum statistical mechanics); Biochemistry; Biochemical engineering; Medicinal chemistry; Nanoscience (nanochemistry, nanomaterials).