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Tert-butyl alcohol - water - cyclohexane system simulation of azeotropic distillation processes


On the one hand increase the number of theoretical plates that can reduce the minimum required to mix the heat dose and the process of negative reliance, on the other hand also shows that in the azeotropic distillation process there is an appropriate number of theoretical plates,[link widoczny dla zalogowanych], when the theoretical plate number exceeds this value , the smallest dose and the process needed to mix the heat load did not change significantly. Appropriate in this case the number of theoretical plates of about 2O. 2.3 Investigation of feeding board position changes the location of feeding plate separation of the tower as shown in Figure 7-8. OlOl00fl --- O-a watercontentinthebottomlfO2.55.07.5l0l2.5l5l7.52O22.525l7.53OColt, mfeedstage Figure 7, bottom feed plate location on the water content of the main Mexican Fig7Influenceoffeedstageonwatercontentinthebottom summer: Main 99966633305l0l520253OColumfeedstage Figure 8 feeding position of the tower plate the top of the water concentration in aqueous phase Fig. 8Influenceoffeedstageonwaterconcentrationinwaterphase from Figure 7 and 8 can be seen that the smaller the feed plate number, the better the separation. Reduce the feeding plate number, which lowered the kettle liquid water content,[link widoczny dla zalogowanych], is conducive to the reaction; and also enhance the concentration of top waste water to reduce the _r of the consumption of alcohol and cyclohexane, but also for waste water treatment facilitated. Therefore, in industrial production, feed plate closer to the top of the tower the better. 2.4 distillation tower with a water pressure changes on the effect of 161 proved by the pressure after the azeotrope boiling point increases as the total amount of water an azeotrope with water in mole content x \increase,[link widoczny dla zalogowanych], while increasing the pressure on the belly will be reduced by 90% or less of the energy level of the water. Table 2 shows the temperature Ta and the azeotrope azeotrope with water and distilled out 1g xH0 mixture heat water to a 90% Q P ≤ 90% with the pressure changes. Table 2 azeotrope boiling point under pressure and water content Tab.2Azeotropictemperatureandwatermolfractionofternarymixtureunderdifferrentpressures the pressure is greater than four atmospheric pressure, the system has not formed azeotrope, so this simulation study r system Pressure 1 - 4atm change, azeotrope with water boiling point and changes. Mountain Table 2 shows that, as the system pressure increases, increased gradually with water, 90% below the energy level of the water also showed decreasing trend, which is beneficial to both distillation separation and energy efficiency. Therefore, in the assurance system azeotrope presence,[link widoczny dla zalogowanych], the greater the pressure the better the tower, about 3 ~ 4atm appropriate. 3 Conclusions (1) In determining the tray number and the separation of certain requirements, there must be a minimum entrainer flow the most. (2) increasing the number of theoretical plates can reduce the minimum entrainer broom and process heat load required; azeotropic distillation process in the existence of a suitable theoretical plate number, when the theoretical plate number exceeds this value, the smallest dose and the process required to mix the heat load did not change significantly. (3) feeding location closer to the top plate, the better the separation. (4) guarantee system azeotrope presence,[link widoczny dla zalogowanych], Distillation tower J powerful advantage of.
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