Catalytic Amination of Octanol for Synthesis of Trioctylamine and Catalyst Characterization

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.

Synthesis and aggregation behaviors of tail-branched surfactant Guerbet-cetyl trimethyl ammonium chloride

“…One-step amination has been a mature technology for producing tertiary amines from aliphatic alcohols [14]. In the present, the reaction is generally catalyzed by Cu/Ni-based catalysts [15,16]. Cationic surfactants are vulnerable to being adsorbed on solid surface through electrostatic interaction since most solid materials are electro-negatively charged in aqueous environment.…”

Spectroscopic, thermodynamic and ultrasonic properties of pseudo‐binary mixtures of organic extractants and vegetable oil at 25–60°C under atmospheric pressure

“…In case of TOA, the amine group forms strong hydrogen bonds with adjacent molecules causing self‐association of amine molecules 60 . In addition, the bulky alkyl chain of TOA causes steric hindrance 61 . The increase in temperature breaks the existing bonds to form new intermolecular interactions as is evident from the fall in positive trend of the Δ η values.…”

Properties and sodium salicylate induced aggregation behavior of a tail-branched cationic surfactant with a hydroxyl-containing hydrophilic head

“…The amination reaction, which has been a mature technology known as one-step amination, 34 was catalyzed by Cu-Ni composite catalyst prepared by co-precipitation. 35,36 Detailed synthetic procedure of tertiary amine was stated in ESI. †…”