Catalytic Amination of Octanol for Synthesis of Trioctylamine and Catalyst Characterization |
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Authors: | Yunling Li Qiuxiao Li Lifei Zhi Minghui Zhang |
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Affiliation: | (1) College of Chemistry and Chemical Engineering, Shanxi University, 34# Wenyuan Str., Taiyuan, 030001, Shanxi, People’s Republic of China;(2) China Research Institute of Daily Chemical Industry, Taiyuan, China |
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Abstract: | Abstract Synthesis of trioctylamine by the amination of octanol and ammonia under atmospheric pressure over an excellent Ni–Cu catalyst
supported on diatomite is studied in this article. The key factor for the synthesis is the preparation of catalyst with a
high activity and selectivity. The activity and selectivity can be adjusted by varying the Ni to Cu ratios. The optimum molar
ratio of Ni to Cu was 1.25:1. For the catalyst with a Ni/Cu ratio of 1.25:1, the conversion of octanol and the selectivity
of trioctylamine reached 100 and 97.3%, respectively, at 5 h. The reaction of dioctylamine with octanol was the rate-determining
step for the formation of trioctylamine. The Physical properties of catalysts, such as particle size, Brunauer–Emmett–Teller
(BET) surface area, valence state of catalyst elements, morphology and reduction properties of catalysts were investigated
by using X-ray diffraction, nitrogen adsorption–desorption isotherms (BET), X-ray photoelectron spectroscopy, Transmission
electron microscopy, and temperature programmed reduction, respectively. The reaction scheme of catalytic amination of octanol
with ammonia was discussed. |
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