混合溶剂抽提甲基环己烷的溶剂性能

采用浊点法测定了甲基环己烷-庚烷-单-溶剂（N-甲基-吡咯烷酮,NMP）或混合溶剂（N-甲基-吡咯烷酮＋环西砜、苯甲醇＋环丁砜）的三元或四元体系在（25±0．1）℃下的液液分层曲线．结合体系的物性（如折光指数或比重）测定了各体系的结线数据．由实验数据计算得到的选择性系数、溶解度和容量等数据,可以初步评价单一溶剂以及混合溶剂体系萃取分离烷烃与环烷烃的基本性能．研究发现单一纯溶剂的选择性系数较小,但与环丁砜组成混合溶剂体系能在一定范围内提高选择性系数．苯甲醇与环丁砜混合溶剂体系的选择性系数、溶解度和容量优于相同质量组成的N-甲基-吡咯烷酮与环丁砜混合溶剂体系．     

环戊二烯催化甲基化制备甲基环戊二烯催化剂筛选及制备条件的研究

从反应系统的特点考虑,选定了几种具有不同酸碱特性的金属氧化物进行复配处理,在一定条件下进行相应的催化活性试验,并利用正交试验,确定了制备催化剂的最佳工艺条件。结果表明：以９５％及无水乙醇混合制备的Ａｌ２Ｏ３ＭｇＯＫ２ＣＯ３三组分催化剂具有适合的酸、碱中心,是环戊二烯与甲醇催化甲基化合适的催化剂。这种催化剂制备最佳工艺条件为：摩尔比３∶２∶１,焙烧温度７００℃,焙烧时间６ｈ。     

浓硫酸、过氧化氢催化合成糠酸甲酯

从浓Ｈ２ＳＯ４，３０％Ｈ２Ｏ２为催化剂合成糠酸甲酯，苯做萃取剂，萃取提取酯化产物，反应快，收率８３％。     

甲基橙合成实验的改进

实验室合成甲基橙的传统方法为低温二步法,存在着条件难控制、费时、费工收率低的问题。在常温下用一步法合成甲基橙,结果表明：室温下在反应器内一次性加入对氨基苯磺酸、亚硝酸钠和水,边搅拌边慢慢滴加N,N-二甲基苯胺,滴加完毕搅拌反应20min,此合成方法收率可达85％左右。比传统低温二步法收率提高18％。通过对不同实验方法所得产品的红外光谱检验,常温下一步法合成与低温下二步法合成的产品光谱曲线基本一致。     

MMA－ST乳液共聚合成核阶段的数学模型

研究了ＭＭＡ－ＳＴ乳液共聚合动力学规律，提出了成核阶段数学模型，进行了计算机模拟，并对模型预计结果与实验数据进行了比较和讨论     

甲基叔丁基醚与苯酚在改性HY分子筛催化剂上合成2,4-二叔丁基苯酚的研究

对改性HY分子筛催化剂研究表明,每种改性物均存在一个最佳含量．P2O5改性后HY催化剂的性能最优越。苯酚的转化率达99.60％,2,4-二叔丁基苯酚(2,4-DTBP)选择性达63.90％：这一结果是目前分子筛作催化剂合成(2,4-IDTBP)的最好结果,具有潜在的应用前景,采用常压连续流动固定床反应器,克服了釜式反应操作麻烦的缺点：使用HY分子筛催化剂,无污染、无腐蚀,为工业生产提供了艮好的环境、以MTBE做为烷基化试剂,使工业生产叔丁基苯酚可以因地制宜地扩大原料来源：MTBE价格低廉易得,运输方便,进而可以降低产品成本     

对叔丁基苯甲酸甲酯加氢合成对叔丁基苯甲醛

以对叔丁基苯甲酸甲酯为原料,二氧化锰负载氧化物为催化剂,在常压固定床反应器上考察了加氢还原催化剂对制备对叔丁基苯甲醛的影响因素,并获得了最佳反应条件为:反应温度为 380~400℃,酯的液时空速为 5mL/h,氢气的气时空速约为1050h-1及合适的催化剂:15%~20%MnO2 /γ Al2O3。     

异丁醛异构为甲乙酮的研究(Ⅲ)

首次考察了在SAPO-5、SAPO-11、SAPO-34等磷酸硅铝分子筛及经磷改性的BZSM-5分子筛上异丁醛异构化的性能。在SAPO-11上,目的产物甲乙酮的选择性,与在BZSM-5上相近,可大于70％;BZSM-5经磷改性,异丁醛转化率无明显改变,而甲乙酮的选择性有较大提高,收率可达70％,SAPO-5及SAPO-34由于其孔道大小与反应物及目的产物分子大小不匹配,异丁醛转化率和甲乙酮选择性均甚低。     

Comparison of co-current and counter-current flow in a bifunctional reactor containing ammonia synthesis and 2-butanol dehydrogenation to MEK

In this study, a multi-tubular thermally coupled packed bed reactor in which simultaneous production of ammonia and methyl ethyl ketone (MEK) takes place is simulated. The simulation results are presented in two co-current and counter-current flow modes. Based on this new configuration, the released heat from the ammonia synthesis reaction as an extremely exothermic reaction in the inner tube is employed to supply the required heat for the endothermic 2-butanol dehydrogenation reaction in the outer tube. On the other hand, MEK and hydrogen are produced by the dehydrogenation reaction of 2-butanol in the endothermic side, and the produced hydrogen is used to supply a part of the ammonia synthesis feed in the exothermic side. Thus, 30.72% and 31.88% of the required hydrogen for the ammonia synthesis are provided by the dehydrogenation reaction in the co-current and counter-current configurations, respectively. Also, according to the thermal coupling, the required cooler and furnace for the ammonia synthesis and 2-butanol dehydrogenation conventional plants are eliminated, respectively. As a result, operational costs, energy consumption and furnace emissions are considerably decreased. Finally, a sensitivity analysis and optimization are applied to study the effect of the main process parameters variation on the system performance and obtain the minimum hydrogen make-up flow rate, respectively.     

Stability analysis and characterization of the nano emulsified Jatropha-curcas-based bio-fuel

This work investigates the suspension duration of the nanosized multiwalled carbon nanotubes (MWCNT) and aluminum oxide (Al₂O₃) in B20, B50 and B70 blends of Jatropha Methyl ester. The MWCNT and aluminum oxide (Al₂O₃) are added to the fuel blends in the proportions of 50 and 100 pmm separately by ultra sonication. The prepared fuel samples are characterized, and turbidity analysis was done to find the stability rate of nano-additives. The outcomes reveal the maximum stability rate for MWCNT and Al₂O₃ as 83.3% and 87.03%, respectively, with 50ppm in B20 over a period of eighteen days. A considerable drop in suspension was observed with the 100 ppm MWCNT and Al₂O₃ biodiesel blends.