In this study, the LLE data of ternary system(water + 1,6-diaminohexane + 2-methyl-1-propanol) and(water +1,6-diaminohexane + 3-methyl-1-butanol) were measured at 293.15, 303.15 and 313.15 K under atmospheric pressure...In this study, the LLE data of ternary system(water + 1,6-diaminohexane + 2-methyl-1-propanol) and(water +1,6-diaminohexane + 3-methyl-1-butanol) were measured at 293.15, 303.15 and 313.15 K under atmospheric pressure. Reliability of the experimental tie-line data was checked by empirical Hand, Othmer-Tobias and Bachman equations. Distribution coefficient(D) and selectivity(S) were calculated in order to investigate capability of the studied organic solvents for 1,6-diaminohexane extraction. The high values of separation factors demonstrated that 2-methyl-1-propanol and 3-methyl-1-butanol were applicable for this purpose. The experimental data were correlated by nonrandom two-liquid(NRTL) and universal quasi-chemical(UNIQUAC) models.The percent-root-mean-square deviation(RMSD) values for NRTL and UNIQUAC models were less than 0.15,which indicated that the experimental data have been sufficiently correlated.展开更多
采用共沉淀法和机械混合法制备了铜锌催化剂,并利用TPR、XRD和N2O吸附分解催化剂表征手段分析了铜锌催化剂中ZnO和Cu在仲丁醇(sec-butanol,SBA)脱氢反应中的作用。研究表明,Cu0是SBA脱氢的活性中心,ZnO具有分散铜物种和抗烧结能力。ZnO...采用共沉淀法和机械混合法制备了铜锌催化剂,并利用TPR、XRD和N2O吸附分解催化剂表征手段分析了铜锌催化剂中ZnO和Cu在仲丁醇(sec-butanol,SBA)脱氢反应中的作用。研究表明,Cu0是SBA脱氢的活性中心,ZnO具有分散铜物种和抗烧结能力。ZnO能够有效分散铜物种和阻止Cu0烧结的原因是在催化剂制备过程中形成了(CuZn)x(OH)y(CO3)z(x=1,5;y=2,6,z=1,2)前体,经焙烧形成了高分散的CuO-ZnO固溶体。同时,通过SBA催化脱氢反应测试筛选了适宜的Cu/Zn摩尔比,当Cu/Zn为1∶1时,表现出良好的反应活性,常压、240℃下质量空速为17.5 h 1时,该催化剂对SBA转化率达到80.54%,甲乙酮(methyl ethyl ketone,MEK)收率达到76.04%。铜锌催化剂的脱氢活性与Cu0比表面积不呈线性关系,SBA脱氢反应是一结构敏感型反应。展开更多
Catalyzed Resolutionb racemic 2-methyl-1-butanol was achieved,with max.95%optical purity of chiral alcohol,by candida cycindrace lipase in non-aqueous organic media.Effect of some factors on the resolution was investg...Catalyzed Resolutionb racemic 2-methyl-1-butanol was achieved,with max.95%optical purity of chiral alcohol,by candida cycindrace lipase in non-aqueous organic media.Effect of some factors on the resolution was investgated.The factors included temperature,pH,organic solvents,the amount of added water and the reaction time.展开更多
DL-2-methyl-1-butanol was resoluted by porcine pancreatic lipase(PPL)with tributyrin served as substrate and organic phase.Tributyrin,2-methylbutyl butyrate and dibutyrin in the sample from the reaction process were s...DL-2-methyl-1-butanol was resoluted by porcine pancreatic lipase(PPL)with tributyrin served as substrate and organic phase.Tributyrin,2-methylbutyl butyrate and dibutyrin in the sample from the reaction process were separated by TLC.Their respective spots were obtained by using developing solution of hexane:ether:ethyl-acetate:methanol(10:2:1:1 in vol.)and placing spreaded gel panel in iodine steam.The spots were analyzed by a TLC analyzing software designed by Visual C++programming language,with satisfactory accuracy.It shows that monitoring the reaction by TLC is realizable.展开更多
文摘In this study, the LLE data of ternary system(water + 1,6-diaminohexane + 2-methyl-1-propanol) and(water +1,6-diaminohexane + 3-methyl-1-butanol) were measured at 293.15, 303.15 and 313.15 K under atmospheric pressure. Reliability of the experimental tie-line data was checked by empirical Hand, Othmer-Tobias and Bachman equations. Distribution coefficient(D) and selectivity(S) were calculated in order to investigate capability of the studied organic solvents for 1,6-diaminohexane extraction. The high values of separation factors demonstrated that 2-methyl-1-propanol and 3-methyl-1-butanol were applicable for this purpose. The experimental data were correlated by nonrandom two-liquid(NRTL) and universal quasi-chemical(UNIQUAC) models.The percent-root-mean-square deviation(RMSD) values for NRTL and UNIQUAC models were less than 0.15,which indicated that the experimental data have been sufficiently correlated.
文摘采用共沉淀法和机械混合法制备了铜锌催化剂,并利用TPR、XRD和N2O吸附分解催化剂表征手段分析了铜锌催化剂中ZnO和Cu在仲丁醇(sec-butanol,SBA)脱氢反应中的作用。研究表明,Cu0是SBA脱氢的活性中心,ZnO具有分散铜物种和抗烧结能力。ZnO能够有效分散铜物种和阻止Cu0烧结的原因是在催化剂制备过程中形成了(CuZn)x(OH)y(CO3)z(x=1,5;y=2,6,z=1,2)前体,经焙烧形成了高分散的CuO-ZnO固溶体。同时,通过SBA催化脱氢反应测试筛选了适宜的Cu/Zn摩尔比,当Cu/Zn为1∶1时,表现出良好的反应活性,常压、240℃下质量空速为17.5 h 1时,该催化剂对SBA转化率达到80.54%,甲乙酮(methyl ethyl ketone,MEK)收率达到76.04%。铜锌催化剂的脱氢活性与Cu0比表面积不呈线性关系,SBA脱氢反应是一结构敏感型反应。
文摘Catalyzed Resolutionb racemic 2-methyl-1-butanol was achieved,with max.95%optical purity of chiral alcohol,by candida cycindrace lipase in non-aqueous organic media.Effect of some factors on the resolution was investgated.The factors included temperature,pH,organic solvents,the amount of added water and the reaction time.
文摘DL-2-methyl-1-butanol was resoluted by porcine pancreatic lipase(PPL)with tributyrin served as substrate and organic phase.Tributyrin,2-methylbutyl butyrate and dibutyrin in the sample from the reaction process were separated by TLC.Their respective spots were obtained by using developing solution of hexane:ether:ethyl-acetate:methanol(10:2:1:1 in vol.)and placing spreaded gel panel in iodine steam.The spots were analyzed by a TLC analyzing software designed by Visual C++programming language,with satisfactory accuracy.It shows that monitoring the reaction by TLC is realizable.
