Carbon tetrachloride is an ozone depleting chemical, while chloroform is not Therefore it is important for the catalytic hydrodechlorination of CCl 4 to CHCl 3 In this paper, kinetics on the catalytic hydrogenation of...Carbon tetrachloride is an ozone depleting chemical, while chloroform is not Therefore it is important for the catalytic hydrodechlorination of CCl 4 to CHCl 3 In this paper, kinetics on the catalytic hydrogenation of carbon tetrachloride to chloroform in liquid phase was studied A reaction mechanism was proposed Hydrogen molecular was activated on the surface of catalyst, the activated hydrogen atom then reacted with CCl 4 in the solution and produced CHCl 3 A definite kinetic equation could be deduced from the reaction mechanism The reaction rate constant is concerned with the intial concentration of CCl 4 in the solution, pressure, reaction temperature and the concentration of active center All these factors were investigated over Pt Pd/C catalyst and fit in with the kinetic equation The activation energy of the reaction is 86?KJ/mol according to the experimental results [WT5H1]展开更多
A solid acid catalyst has been prepared by grafting Boron trifluoride on mesoporous molecular sieve MCM 41 and characterized by XRD and FTIR techniques. The XRD and FTIR results indicated that the BF 3·Et 2O inte...A solid acid catalyst has been prepared by grafting Boron trifluoride on mesoporous molecular sieve MCM 41 and characterized by XRD and FTIR techniques. The XRD and FTIR results indicated that the BF 3·Et 2O interlocks with the silicon groups of MCM 41 surface to form strong solid acid. The solid acid catalyst would effectively promote the opening of epichlorohydrin with isobutanol to form 1 isobutoxy 3 chloropropanol, and showed a nice activity and selectivity.展开更多
文摘Carbon tetrachloride is an ozone depleting chemical, while chloroform is not Therefore it is important for the catalytic hydrodechlorination of CCl 4 to CHCl 3 In this paper, kinetics on the catalytic hydrogenation of carbon tetrachloride to chloroform in liquid phase was studied A reaction mechanism was proposed Hydrogen molecular was activated on the surface of catalyst, the activated hydrogen atom then reacted with CCl 4 in the solution and produced CHCl 3 A definite kinetic equation could be deduced from the reaction mechanism The reaction rate constant is concerned with the intial concentration of CCl 4 in the solution, pressure, reaction temperature and the concentration of active center All these factors were investigated over Pt Pd/C catalyst and fit in with the kinetic equation The activation energy of the reaction is 86?KJ/mol according to the experimental results [WT5H1]
文摘A solid acid catalyst has been prepared by grafting Boron trifluoride on mesoporous molecular sieve MCM 41 and characterized by XRD and FTIR techniques. The XRD and FTIR results indicated that the BF 3·Et 2O interlocks with the silicon groups of MCM 41 surface to form strong solid acid. The solid acid catalyst would effectively promote the opening of epichlorohydrin with isobutanol to form 1 isobutoxy 3 chloropropanol, and showed a nice activity and selectivity.
