2—正十一烷基—1,3—二氧杂环已烷—5,5—二羧酸二钠盐的合成和性质

以十二醛与二羟甲基丙二酸二乙酯为原料反应,然后用氢氧化钠皂化,合成了2—正十—烷基—1,3—二氧杂环己烷—5,5—二羧酸二钠盐(4),并对它的临界胶束浓度(CMC)进行了测定。     

喷亭酸甲酯生产工艺改进探讨

传统的喷亭酸甲酯生产工艺采用三乙酯合成路线,工艺路线长,使用原料多,而采用三甲酯合成路线,工艺路线短,使用原料少,优势明显。     

快速合成乳酸乙酯

以乳酸和乙醇为原料,钨钼为催化剂催化合成乳酸乙酯.通过优化验证实验,得出最宜合成条件为:n(乳酸):n(乙醇)=1:3,钨钼催化剂为1.5g,带水剂为20ml,反应时间为30min,乳酸乙酯产率可达93.2%.该法能避免现行硫酸催化剂腐蚀设备和污染环境的弊端,并能提高反应速率和乳酸乙酯的产率,且催化剂可重复使用.     

利用S∞值准确测定硬脂酸分子的截面积

把吉布斯吸附理论所得的小分子脂肪酸,醇,胺分子的截面积的粗略值Ｓ∞,外延到用单分子膜法测定难溶于水而可溶于苯的高级脂肪酸,醇,胺分子的截面积。     

脂肪酶催化硬脂酸酯化反应的研究

用脂肪酶在四氢呋喃中催化合成硬脂酸酯.研究了反应温度、时间、加水量、加酶量、不同的醇以及原料摩尔比对硬脂酸转化率的影响.最佳反应条件为:反应温度35℃,硬脂酸与乙醇的摩尔比为1∶1.3,加水量为0.4%,加酶量为600μg/g硬脂酸,反应时间24 h,硬脂酸转化率达72.4%.     

丁二酸单酯酰氯的合成工艺研究

5-氨基乙酰丙酸作为一种新型光动力化合物在医学和农业领域具有广泛的应用.笔者以丁二酸酐、甲醇为主要原料,合成了5-氨基乙酰丙酸的第一步反应中间体丁二酸单酯酰氯.产物的收率从物料比、反应时间、反应温度等影响因素进行了优化,找到了最佳的反应条件,为5-氨基乙酰丙酸的工业生产提供有价值的参考.     

Surface modification of barite nanoparticles using stearate

In this study, the barite nanoparticles were successfully modified with stearate and the influence of stearate addition on the performance of barite nanoparticles was systematically investigated. The products were characterized by activating factor analysis, contact angle test, surface energy calculation, sedimentation rate calculation, rheological measurement, and FT-IR analysis, etc. As the quantity of added stearate increased, both the activating factor and contact angle of barite nanoparticles increased first then decreased. When the stearate content was 5% of the mass of barite nanoparticles, the activating factor and water contact angle of modified particles reached maximum value, 97% and 126° respectively. At this time, the sedimentation rate reached minimum, and so did the surface energy. The rheological test reveals that the viscosity of modified barite nanoparticles/petronol system decreases greatly, indicating the surface performance of barite nanoparticles has changed from hydrophilicity to lipophilicity after modification. C=O and COO stretching vibration peaks were found in the FT-IR spectra, which proves that the stearate has combined onto the surface of barite nanoparticles. Finally, according to the zeta potential result of unmodified barite, the possible modification mechanism was provided. Project supported by the International Corporation Project (Grant No.07SU07001), and the Science Foundation of Science and Technology Commission of Shanghai Municipality (Grant No.0552nm011)     

新型膦亚胺中间体的合成

在固体碳酸钾作用下,氯代丙酮和三氮唑的亲核取代反应得到1-（1H-1,2,4-三氮哇-1-基）丙酮1-在三乙胺存在下,由氰乙酸乙酯、硫磺和1的Gewald反应制得2-氨基-4-甲基-5-（1H-1,2,4-三氮唑-1-基）噻吩-3-甲酸乙酯2．再用三苯基膦、六氯乙烷、2和三乙胺的反应合成了新型辟亚胺中间体3．探讨反应进行的条件,并用元素分析、MS和’HNMR对2和3进行了结构表征．