Esterification Of Benzoic Acid
Fig:3% Selectivity of methyl benzoate (MB),Methyl oxobenzoate(MOB) and others with respect to time in minutes using Microwave Irradiation ,Reaction temperature :70 ᵒC,Feed ratio,BA:M:Hβ(Benzoic acid:Methanol:Zeolite Hβ)::1:3:1. Fig:4% Selectivity of methyl benzoate (MB) with respect to time and temperature using MW 300 watt,feed ratio,BA:M:Hβ(Benzoic acid:Methanol:Zeolite Hβ)::1:3:1.
With the use of solid acid catalyst (Hβ),same reaction is performed at temperture 70°C with the feed ratio Benzoic acid: Methanol: Hβ:: SA:M: β::1:3:1.
As the activity of zeolite enhances with temperature, so at 70°C, maximum conversion(83%) of BA and selectivity for MB(50%) are obtained. Again here with increase in temperature MB is produced with 64 % selectivity. In fig.4 effect of time shows that with Hβ 70 °C and with Hβ 80°C temperature gave the maximum selectivity to the desired product MB within the reaction time 15 min only.If the time of reaction increases, the selectivity remains constant.Increase in temperature decreases the selectivty of MB decreases as the boiling point of methanol is