Liquid phase synthesis of one of the important fuel oxygenate, ethyl tert-butyl ether （ETBE）, from etha-nol and tert-butyl alcohol （TBA） has been studied in catalytic distillation column （CDC） using ion exchange...Liquid phase synthesis of one of the important fuel oxygenate, ethyl tert-butyl ether （ETBE）, from etha-nol and tert-butyl alcohol （TBA） has been studied in catalytic distillation column （CDC） using ion exchange resin catalyst CT-145H. A packed CDC of 1.2 m height and 50 mm diameter with indigenously developed reactive sec-tion packing was used to generate experimental data. Effect of different key variables on product purity in distillate, was investigated to find the optimum operating conditions for ETBE synthesis. The optimum conditions for 0.2 kg·s-1 of ethanol feed were found：reboiler duty of 375 W, molar feed ratio of 1︰1.3 of reactants, and reflux ratio of 7. Concentration profiles for each component along each column section at optimum conditions were also drawn. Neither output nor input multiplicity was observed at experimental conditions.展开更多
The PVC series of macroporous sulfonic cation-exchange resins were prepared by thesulfonation of a macroporous PVC bead with concentrated sulfonic acid or chlorosulfonicacid, the resulting sulfonic resin was employed ...The PVC series of macroporous sulfonic cation-exchange resins were prepared by thesulfonation of a macroporous PVC bead with concentrated sulfonic acid or chlorosulfonicacid, the resulting sulfonic resin was employed in the investigation of catalyticesterification and softening of water The results show that the yields of esters reach60.0-84.4% according as different fatty acids and alcohols, the refractive indexes of estersobtained resemble those reported in the references basically, meanwhile, 345L softenedwaler which holds 0.06mmol/L hardness would be prepared by 1 L wet sulfonic resinreusing for 4 times. The resulting sulfonic resins would have 1.6-2.0 or 2.5-3.0mmol/gexchange capacity by using concentrated sulfonic acid or chlorosulfonic acid assulfonating agent, respectively The sulfonic resin has a macroporous structure taking themorphology with agglomerates of minutely spherical gel particles as characteristic.展开更多
基金Part of this paper was included in the proceedings of World Congress on Engineering and Computer Science,San Francisco,USA,22-24 October,2008,pp.79-84(ISBN 978-988-98671-0-2)The first author is grateful to Higher Education Commission of Pakistan for funding this research under indigenous scheme
文摘Liquid phase synthesis of one of the important fuel oxygenate, ethyl tert-butyl ether （ETBE）, from etha-nol and tert-butyl alcohol （TBA） has been studied in catalytic distillation column （CDC） using ion exchange resin catalyst CT-145H. A packed CDC of 1.2 m height and 50 mm diameter with indigenously developed reactive sec-tion packing was used to generate experimental data. Effect of different key variables on product purity in distillate, was investigated to find the optimum operating conditions for ETBE synthesis. The optimum conditions for 0.2 kg·s-1 of ethanol feed were found：reboiler duty of 375 W, molar feed ratio of 1︰1.3 of reactants, and reflux ratio of 7. Concentration profiles for each component along each column section at optimum conditions were also drawn. Neither output nor input multiplicity was observed at experimental conditions.
文摘The PVC series of macroporous sulfonic cation-exchange resins were prepared by thesulfonation of a macroporous PVC bead with concentrated sulfonic acid or chlorosulfonicacid, the resulting sulfonic resin was employed in the investigation of catalyticesterification and softening of water The results show that the yields of esters reach60.0-84.4% according as different fatty acids and alcohols, the refractive indexes of estersobtained resemble those reported in the references basically, meanwhile, 345L softenedwaler which holds 0.06mmol/L hardness would be prepared by 1 L wet sulfonic resinreusing for 4 times. The resulting sulfonic resins would have 1.6-2.0 or 2.5-3.0mmol/gexchange capacity by using concentrated sulfonic acid or chlorosulfonic acid assulfonating agent, respectively The sulfonic resin has a macroporous structure taking themorphology with agglomerates of minutely spherical gel particles as characteristic.
