Desulfurization from cracking of gasoline via selective oxidation catalyzed by phase tranfer catalyst is investigated.Using cetyltrimethyl ammonium bromide(CTAB) as the phase transfer catalyst,hydrogen peroxide as the...Desulfurization from cracking of gasoline via selective oxidation catalyzed by phase tranfer catalyst is investigated.Using cetyltrimethyl ammonium bromide(CTAB) as the phase transfer catalyst,hydrogen peroxide as the oxidant,acetic anhydride as the assistant oxidant,the effects of different conditions,such as reaction time,reaction temperature,the content of phase transfer catalyst,on the desulfurization rate are investigated.When the volume ratio of gasoline and oxidative system is 0.2,the volume ratio of hydrogen peroxide and acetic anhydride is 5,the content of phase transfer catalysis is 0.06 g,reaction time is 0.5 h,the desulfurization rate of the FCC gasoline is 80.13%.After analyzed by GC-FPD,there is no oxidized sulfur-containing compounds remained in the gasoline.展开更多
The conductivity of the solid electrolyte based on urea and thiourea has reached 6. 84 × 10-3 S. cm-1 at room temperature. Analysing the conductive process of this electrolyte we found that thiourea changes into ...The conductivity of the solid electrolyte based on urea and thiourea has reached 6. 84 × 10-3 S. cm-1 at room temperature. Analysing the conductive process of this electrolyte we found that thiourea changes into ammonium thiocyanate at a high temperature, which ionizes into ions, and can conduct the current. We obtained a red color substance through electrolysing the SPE. Analysing it with IR, UV and FAB, we confirmed that it is a polymer with a structure (SCN)n. It is proved that the aninon is SCN-. When weadded HCl into the acetone solution of the SPE, it was found that white precipitation material appeared in the solution, which was identified as NH4Cl, so the canon is NH4+.展开更多
文摘Desulfurization from cracking of gasoline via selective oxidation catalyzed by phase tranfer catalyst is investigated.Using cetyltrimethyl ammonium bromide(CTAB) as the phase transfer catalyst,hydrogen peroxide as the oxidant,acetic anhydride as the assistant oxidant,the effects of different conditions,such as reaction time,reaction temperature,the content of phase transfer catalyst,on the desulfurization rate are investigated.When the volume ratio of gasoline and oxidative system is 0.2,the volume ratio of hydrogen peroxide and acetic anhydride is 5,the content of phase transfer catalysis is 0.06 g,reaction time is 0.5 h,the desulfurization rate of the FCC gasoline is 80.13%.After analyzed by GC-FPD,there is no oxidized sulfur-containing compounds remained in the gasoline.
文摘The conductivity of the solid electrolyte based on urea and thiourea has reached 6. 84 × 10-3 S. cm-1 at room temperature. Analysing the conductive process of this electrolyte we found that thiourea changes into ammonium thiocyanate at a high temperature, which ionizes into ions, and can conduct the current. We obtained a red color substance through electrolysing the SPE. Analysing it with IR, UV and FAB, we confirmed that it is a polymer with a structure (SCN)n. It is proved that the aninon is SCN-. When weadded HCl into the acetone solution of the SPE, it was found that white precipitation material appeared in the solution, which was identified as NH4Cl, so the canon is NH4+.
