A bromine-containing copper-organic coordination compound was prepared by the reaction of tetrrpropylammonium bromide with copper bromide in ethyl acetate solution.The compound obtained was characterized with FTIR,XRD...A bromine-containing copper-organic coordination compound was prepared by the reaction of tetrrpropylammonium bromide with copper bromide in ethyl acetate solution.The compound obtained was characterized with FTIR,XRD,ICP-AES and EA.Meanwhile,its catalytic performance for the oxidative carbonylation of methanol was investigated.The results showed that the introduction of ligand could change the density of copper electron cloud,which improved the redox property for the oxidative carbonylation of methanol to prepare dimethyl carbonate.In the presence of strong base and weak acid salts,the per pass conversion of methanol could reach 57% under the reaction conditions of temperature 383 K,pressure 3.5 MPa,and the mass concentration of catalyst in methanol 0.20 g·ml-1.展开更多
The by products from the dehydration of exo 2 camphanol in the camphor manufacture by hydration process contains two unknown components: A in 14% and B in 15%. The sample mixture containing 90% A and B with different ...The by products from the dehydration of exo 2 camphanol in the camphor manufacture by hydration process contains two unknown components: A in 14% and B in 15%. The sample mixture containing 90% A and B with different mass ratio(ca. 1∶1, 1∶2 and 1∶4) were collected by further fine fractional distillation with 60 plate number for spectroscopic characterization. The combined spectral results of GC, MS and 13 C NMR of the samples revealed that A is exo 2,2,3 trimethylbicyclo[2,2,1]heptane(exo isocamphane) and B is endo 2,2,3 trimethylbicyclo[2,2,1]heptane(endo isocomphane).展开更多
文摘A bromine-containing copper-organic coordination compound was prepared by the reaction of tetrrpropylammonium bromide with copper bromide in ethyl acetate solution.The compound obtained was characterized with FTIR,XRD,ICP-AES and EA.Meanwhile,its catalytic performance for the oxidative carbonylation of methanol was investigated.The results showed that the introduction of ligand could change the density of copper electron cloud,which improved the redox property for the oxidative carbonylation of methanol to prepare dimethyl carbonate.In the presence of strong base and weak acid salts,the per pass conversion of methanol could reach 57% under the reaction conditions of temperature 383 K,pressure 3.5 MPa,and the mass concentration of catalyst in methanol 0.20 g·ml-1.
文摘The by products from the dehydration of exo 2 camphanol in the camphor manufacture by hydration process contains two unknown components: A in 14% and B in 15%. The sample mixture containing 90% A and B with different mass ratio(ca. 1∶1, 1∶2 and 1∶4) were collected by further fine fractional distillation with 60 plate number for spectroscopic characterization. The combined spectral results of GC, MS and 13 C NMR of the samples revealed that A is exo 2,2,3 trimethylbicyclo[2,2,1]heptane(exo isocamphane) and B is endo 2,2,3 trimethylbicyclo[2,2,1]heptane(endo isocomphane).
