3249-47-6Relevant academic research and scientific papers
METHOD FOR PRODUCING ASYMMETRIC ALKYL ETHER HAVING TERTIARY ALKYL GROUP
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Paragraph 0030, (2017/01/31)
PROBLEM TO BE SOLVED: To provide a method capable of obtaining an asymmetric alkyl ether having a tertiary alkyl group easily and industrially. SOLUTION: (1) There is provided a method for producing an asymmetric alkyl ether having a tertiary alkyl group by subjecting a tertiary alcohol and a primary alcohol or a secondary alcohol to a dehydration reaction using activated clay as a catalyst. (2) There is provided the method for producing an asymmetric alkyl ether having a tertiary alkyl group according to (1), where the tertiary alcohol is any one selected from the group consisting of tert-butanol, tert-amylalcohol and 1-adamantyl alcohol. SELECTED DRAWING: None COPYRIGHT: (C)2016,JPOandINPIT
Thermochemistry of branched ethers: Experimental study of chemical equilibrium in the reacting system of tert-amyl alkyl ether synthesis
Verevkin, Sergey P.
, p. 576 - 581 (2007/10/03)
The chemical equilibrium of the reactive systems (alkanol + methylbutenes ? alkyl tert-amyl ether) with the following alkyl substituents: ethyl, propyl, butyl, iso-propyl, sec-butyl, and cyclohexyl, were studied in the liquid phase. Reactions were investigated in the screwed vials in the temperature range (298 to 393) K, and a cation exchanger Amberlist 15 was used as heterogeneous catalyst. Enthalpies of reactions ΔrH m° of teri-amyl alkyl ethers synthesis in the liquid phase were obtained from the temperature dependence of the equilibrium constants and used to derive standard enthalpies of formation, ΔfH m°(1), of tert-amyl alkyl ethers. For the sake of comparison, these enthalpies of formation have been calculated using improved Benson's increments. Calculated values are in close agreement with those from thermochemical measurements.
Thermochemistry of benzyl alcohol: Reaction equilibria involving benzyl alcohol and tert-alkyl ethers
Verevkin, Sergey P.,Vasiltsova, Tatiana V.
, p. 1717 - 1723 (2007/10/03)
Chemical equilibrium of the reactive systems of benzyl alcohol with tert-alkyl ethers was studied in the liquid phase in the temperature range (298 to 373) K and with a cation exchanger Amberlist 15 as a catalyst. Enthalpies of reactions involving benzyl alcohol were obtained from the temperature dependence of the equilibrium constants according to the Second Law and used to derive averaged standard enthalpies of formation of benzyl alcohol ΔfHm(1,298.15K) = -(154-5 ± 1.7) kJ·mol-1 in the liquid state. Vapor pressures and enthalpy of vaporization, ΔlgH m(298.15 K), of benzyl alcohol were determined using transpiration method. The latter value, together with the reliable literature data, provided an averaged result ΔlgHm(298.15 K) = (65.75 ± 0.51) kJ·mol-1. Both averaged results for ΔfHm(1,298.15K)o and ΔfHm(298.15 K) were used to calculate and to recommend the value of enthalpy of formation of benzyl alcohol in the gaseous state ΔfHm(298.15K)o = -(88.8 ± 1.8) kJ·mol-1. Auxiliary data for tert-butyl benzyl ether (energy of combustion, vapor pressures, and enthalpy of vaporization) were measured using calorimetry and transpiration method.
