Investigations Towards the Chemoselective Thioacetaliztion of Carbonyl Compounds by Using Ionic Liquid [bmim]Br as a Recyclable Catalytic Medium

The ionic liquid based on the 1‐n‐butyl‐3‐methylimidazolium cation has been prepared and used as an efficient catalytic medum for the chemoselective thioacetalization of carbonyl compounds. Furthermore, recycling and reuse of this ionic liquid medium has been demonstrated. Moreover, the use of this catalytic medium not only avoids the generation of waste but also provides a green process with minimal hazards.     

新型化学镀镍光亮剂的研究

采用正交试验对以铋盐和吡啶衍生物为主要成分的新型化学镀镍复合光亮剂的组成进行了优化,化学镀镍液的组成及工艺条件为:NiSO4·6H2O25g/L,NaH2PO2·H2O28g/L,CH3COONa15g/L,苹果酸6g/L,乙酸10mL/L,乳酸10mL/L,装载量1.0dm2/L,pH4.5～5.5,80～85°C,20～30min。得到光亮剂的最佳组成为:Bi(NO3)36mg/L,白屈菜氨酸或邻菲啰啉2mg/L,十二烷基磺酸钠2mg/L,CuSO4·5H2O2mg/L。化学镀镍液中加入新型复合光亮剂后,可制得几乎为镜面光亮的、耐蚀性和结合力良好的镍镀层。该光亮剂的用量小,对镀速影响较小(仍在20μm/h以上)。     

微波法合成溴化1-辛基-3-甲基咪唑离子液体

以微波辐射辅助的方法合成溴化1-辛基-3-甲基咪唑[OMIM]Br。实验证明微波辐射能促进N-甲基咪唑与1-溴代辛烷反应。经正交试验分析,确定微波辐射反应最佳条件如下：N-甲基咪唑与1-溴代辛烷物质的量比为1：1．1,反应时间150s,微波功率500W,反应温度70℃,收率为96．39％。经1HNMR确定目标产物。     

盐酸合成炉余热利用

对盐酸合成炉进行技术改造,用盐酸合成炉夹套水驱动溴化锂机组制冷水,将化学热能转换为冷源,供次氯酸钠工序使用,达到了降低生产成本的目的.     

Antiproliferative and Proapoptotic Activities of Methanolic Extracts from Ligustrum vulgare L. as an Individual Treatment and in Combination with Palladium Complex

The aim of this study is to examine the growth inhibitory effects of methanolic leaf and fruit extracts of L. vulgare on HCT-116 cells over different time periods and their synergistic effect with a Pd(apox) complex. The antiproliferative activity of plant extracts alone or in combination with the Pd(apox) complex was determined using MTT cell viability assay, where the IC(50) value was used as a parameter of cytotoxicity. Results show that antiproliferative effects of L. vulgare extracts increase with extension of exposure time, with decreasing IC(50) values, except for 72 h where the IC(50) values for methanolic leaf extract were lower than for the fruit extract. The Pd(apox) complex alone had a weak antiproliferative effect, but combination with L. vulgare extracts caused stronger effects with lower IC(50) values than with L. vulgare extracts alone. The type of cell death was explored by fluorescence microscopy using the acridin orange/ethidium bromide method. Treatments with plant extracts caused typical apoptotic morphological changes in HCT-116 cells and co-treatments with Pd(apox) complex caused higher levels of apoptotic cells than treatment with plant extracts alone. The results indicate that L. vulgare is a considerable source of natural bioactive substances with antiproliferative activity on HCT-116 cells and which have a substantial synergistic effect with the Pd(apox) complex.     

两种新的离子负载的二(乙酰氧基)碘苯试剂的合成

以氯乙酰氯、对碘苯胺为原料,经酰化合成了4-碘-氯乙酰苯胺;接着分别与吡啶、1-甲基咪唑反应得到N-(4-碘苯氨基甲酰甲基)吡啶氯盐和3-甲基-1-(4-碘苯氨基甲酰甲基)咪唑氯盐;随后分别在水溶液中发生阴离子交换,合成了相应的四氟硼酸盐;对应的四氟硼酸盐在新制过氧乙酸中氧化得到两种新的离子负载的新型二(乙酰氧基)碘苯试剂{N-[(4-二乙酰氧基碘)苯氨基甲酰甲基]吡啶四氟硼酸盐}和{3-甲基-1-[(4-二乙酰氧基碘)苯氨基甲酰甲基]咪唑四氟硼酸盐}。以吡啶离子负载试剂的合成为例,对反应条件进行了探讨。化学结构用IR、1HNMR、13CNMR、MS、元素分析表征。     

TBAB和CP双添加剂水合物法分离烟气中的CO2

在四正丁基溴化铵（TBAB）和环戊烷（CP）双添加剂体系下进行了一级水合物法分离烟气中CO2的研究。对比了纯体系和双添加剂体系对水合物生成过程及分离效果的影响。获得了合适的操作条件（温度276.15 K,压力2.0～3.3 MPa）、初始液气比（0.78）、添加剂浓度（CP体积分数为0.6%）。在合适条件下,双添加剂体系相比纯TBAB体系水合过程的载气量达至1.5～2.0倍,剩余气相中CO2摩尔分数由17%降至7%,去除率由40%～50%上升到60%～70%。实验表明,双添加剂体系在水合物法CO2分离技术的分离效果及节能方面存在潜力,为工业化水合物法净化烟气提供了参考和标准。     

百草枯水剂中臭味剂—烷基吡啶的分析

[目的]目前百草枯水剂中臭味剂的分析方法尚未见报道,随着百草枯水剂日益广泛的使用和愈发严格的市场监管,急需建立一个合适的分析方法.[方法]在碱性条件下,以甲苯为萃取剂萃取百草枯水剂中的臭味剂烷基吡啶.采用FID,HP-Innowax毛细管色谱柱,1,3,5-三甲苯为内标物,建立了气相色谱分析法.对萃取物中的3,5-二甲基吡啶、2,3-二甲基吡啶和3-乙基吡啶进行定量分析.[结果]方法的回收率在98％左右,标准偏差分别为0.0029、0.0020、0.0007,变异系数分别为0.0042％、0.0081％、0.0101％,线性相关系数均为1.[结论]该方法适用于百草枯水剂中烷基吡啶臭味剂的定量分析.     

双酚芴环氧树脂的合成研究

以双酚芴(BHPF)和环氧氯丙烷(ECH)为原料制备了双酚芴环氧树脂。研究了ECH与BHPF物质的量比、NaOH用量、催化剂十六烷基三甲基溴化铵(CTBA)用量、反应温度、反应时间等对产品质量的影响,并采用红外、质谱等对产物结构进行了表征。结果表明:较优的工艺条件为:ECH与BHPF物质的量比10∶1,CTBA质量分数3%(基于BHPF质量),NaOH与BHPF物质的量比2.4∶1;醚化反应温度54℃,加碱反应温度65℃,精制反应温度80℃,上述各阶段反应时间分别为60 min,120 min,120 min,产物环氧值可达到0.408。