为探索一种具有工业应用价值的碳酸乙烯酯生产工艺(EC),采用环氧乙烷(EO)与二氧化碳为原料,以高催化活性、易于获取且价格低廉的溴化四乙铵(TEAB)为催化剂,采用单变量考察以及正交实验的方法,探索了反应温度、反应压力、催化剂质量分数...为探索一种具有工业应用价值的碳酸乙烯酯生产工艺(EC),采用环氧乙烷(EO)与二氧化碳为原料,以高催化活性、易于获取且价格低廉的溴化四乙铵(TEAB)为催化剂,采用单变量考察以及正交实验的方法,探索了反应温度、反应压力、催化剂质量分数、反应时间以及初始进料EC与EO的比例对EC收率的影响,以求高收率地得到EC产品.研究表明,在5.5 MPa,180℃,催化剂TEAB与EO的质量百分比为0.3%,反应时间为120 m in,初始进料配比EC/EO为1.0的反应条件下,EC收率可以达到98%.实验验证了该催化剂的活性在11次循环后仍保持稳定.展开更多
The enthalpy of dilution of a solution collaining calcium chloride in aqueousmethanol mixture has been determind with LKB-2107 flow microcalorimeter at 298.15K.The mole fractions of methanol of the mixed solveds 2a we...The enthalpy of dilution of a solution collaining calcium chloride in aqueousmethanol mixture has been determind with LKB-2107 flow microcalorimeter at 298.15K.The mole fractions of methanol of the mixed solveds 2a were 0.00, 0.24, 0.45, 0.75, 0.87,0.91, 0.95 and 1.00 respectively. The eaperimental results were correlated with an extended form of the Debye-Huckel equation. Combining with our former works, the enthalpy of dilution at infinite dilution at 0.5 mol·kg(-1), -ΔHD∞ (m=0.5, xa), for the systems CaCl2/H2O -CH3OH, -C2H5OH. -n-C3H7OH were calculated. The results obtained indicated that,-ΔHD∞ of the three systems change with compositions of the mixed solvent, xa, and thier maximum values are at about 0.87 to 0.95 mole fractions. -ΔHD∞ increase with increasing of carbon atom number of alcohols at the same xa.展开更多
文摘为探索一种具有工业应用价值的碳酸乙烯酯生产工艺(EC),采用环氧乙烷(EO)与二氧化碳为原料,以高催化活性、易于获取且价格低廉的溴化四乙铵(TEAB)为催化剂,采用单变量考察以及正交实验的方法,探索了反应温度、反应压力、催化剂质量分数、反应时间以及初始进料EC与EO的比例对EC收率的影响,以求高收率地得到EC产品.研究表明,在5.5 MPa,180℃,催化剂TEAB与EO的质量百分比为0.3%,反应时间为120 m in,初始进料配比EC/EO为1.0的反应条件下,EC收率可以达到98%.实验验证了该催化剂的活性在11次循环后仍保持稳定.
文摘The enthalpy of dilution of a solution collaining calcium chloride in aqueousmethanol mixture has been determind with LKB-2107 flow microcalorimeter at 298.15K.The mole fractions of methanol of the mixed solveds 2a were 0.00, 0.24, 0.45, 0.75, 0.87,0.91, 0.95 and 1.00 respectively. The eaperimental results were correlated with an extended form of the Debye-Huckel equation. Combining with our former works, the enthalpy of dilution at infinite dilution at 0.5 mol·kg(-1), -ΔHD∞ (m=0.5, xa), for the systems CaCl2/H2O -CH3OH, -C2H5OH. -n-C3H7OH were calculated. The results obtained indicated that,-ΔHD∞ of the three systems change with compositions of the mixed solvent, xa, and thier maximum values are at about 0.87 to 0.95 mole fractions. -ΔHD∞ increase with increasing of carbon atom number of alcohols at the same xa.
