含有三苯胺环类席夫碱的合成

以4,4’-二甲酰基三苯胺为原料,通过Wittig和胺醛缩合反应合成了两个含有三苯胺环席夫碱类化合物——4-(对甲基苯乙烯基)-4’-亚(α-萘胺)甲基三苯胺和4-(对甲基苯乙烯基)-4’-亚(2-氨基芴)甲基三苯胺,其结构经1H NMR,13CNMR和IR确证。     

对氟苯乙烯-二乙烯基苯强酸性阳离子交换树脂的合成及其热稳定性研究

以对氟苯乙烯，二乙烯苯为原料合成了强酸性阳离子交换树脂，考察了磺化反应的工艺条件及卤原子，树脂类型对树脂耐热稳定性能的影响。研究表明，对氟苯乙烯－二乙烯基苯共聚体需用发烟硫酸在110℃才可磺化，大孔磺化对氟苯乙烯－二乙烯基苯树脂在190℃水中20h的磺酸基降解率为24．7％，而普通磺酸树脂的磺酸基降解率为53．3％。     

一种新型长共轭结构咔唑衍生物的合成及其光学性质

以咔唑、N,N-二甲基甲酰氨、溴丁烷和对甲基苯乙烯为原料,经Wittig反应和Heck反应合成了一种新型的长共轭结构的咔唑衍生物——3-[(对甲基苯乙烯基)苯乙烯基]-N-丁基咔唑(4),其结构经1H NMR,IR和元素分析表征。用UV-Vis和荧光光谱初步探讨了4的光学性质,结果表明,4具有良好的光学性质。     

2-位取代的4-亚甲基-1,3-二氧环戊烷开环聚合反应研究

合成了两种新单体，４ 亚甲基 ２ 苯乙烯基 １，３ 二氧环戊烷和４ 亚甲基 ２ 苯乙烯基 ２ 甲基 １，３ 二氧环戊烷．研究了这两种单体的自由基和阳离子聚合反应．根据聚合物的红外光谱和核磁共振碳、氢谱，确定了聚合物的结构，讨论了聚合反应机理，特别对２ 位取代基对聚合反应和产物的影响作了初步的探讨．     

以硅胶和三氯化钛为原料合成Ti-MCM-41分子筛 Ⅲ. Ti-MCM-41分子筛的催化活性

 考察了以硅溶胶和TiCl3水溶液为原料合成的含钛中孔分子筛Ti－MCM－41对苯乙烯,α－甲基苯乙烯和环己烯氧化反应的催化性能．结果表明,对于CC双键位于端部的苯乙烯和α－甲基苯乙烯,发生的主要反应是CC双键的氧化断裂,而对于CC双键位于中间的环己烯,发生的主要反应是环氧化反应．     

高粘度枯基酚甲醛树脂的固体酸催化法合成新工艺研究

以对枯基苯酚和甲醛为原料,运用正交实验法,经过固体酸(阳离子交换树脂)催化缩合、过滤、蒸馏等过程,研制出合成枯基酚甲醛树脂产品的一种新型工艺路线。产品外观为红棕色粘稠液体,pH值接近7,能够耐水和酸碱,稳定性好,主要用于电绝缘体、涂料和橡胶制品等领域。     

阳离子交换树脂催化合成α-甲基苯乙烯低聚体

以阳离子交换树脂为催化荆，以α-甲基苯乙烯为原料合成以α-甲基苯乙烯低聚体．考察了反应温度、反应时间、催化剂用量对反应的影响．结果表明。在温度为50℃，催化剂用量为原料质量的7．5％，反应时间5h下。产物收率为91．8％。折光率为1．5720(20℃)。分子平均质量为246．     

α-甲基苯乙烯与苯酚的烷基化反应研究

分别以磷酸-冰醋酸,苯酚铝,阳离子型交换树脂及络合物为催化剂,研究了α-甲基苯乙烯与苯酚的烷基化反应。用GC测得各组份的含量,结果表明,用不同的催化剂,可生成不同含量的烷基化产物。烷基化产物以4-枯基苯酚,2,4-二枯基苯酚及2,4,6-三枯基苯酚为主。     

均匀设计法优化2-羟基-3-氰甲基-5-甲基苯乙酮的合成

以对甲基酚为起始原料，通过酰基化，Fries重排，氯甲基化和氰化合成了2－羟基－3－氰甲基－5－甲基苯乙酮，采用均匀设计对合成条件进行研究，获得了满意的收率（88．5％）。     

某些新的N-苯乙烯基脲及N-苄基硫脲衍生物的合成

用苯乙烯基异氰酸脂与脂肪胺反应合成了6个新的N-苯乙烯基脲化合物,产品收率多在90%以上。通过α-甲基苄基和对氯α-甲基苄基异硫氰酸脂与脂肪胺反应制备了12个新的N-苄基衍生物。     

Addition Mechanisms of Phenol toward Formaldehyde under Acidic Condition： a Theoretical Investigation

The reaction mechanisms of phenol with formaldehyde in the first and second addition at the ortho- and para-position in acid solution were theoretically investigated at the PW91/DNP level with solvent effects included. The reaction of phenol with protonated methanediol firstly forms an adduct intermediate, via a SN2 mechanism with a water molecule as the leaving group. From the adduct intermediate, there are two reaction channels involving a proton transfer to form the addition products. One is that a proton directly transfers via a four-membered ring transition state with a notable energy barrier (Four-member mechanism). Another mechanism involving a water molecule as catalyst to mediate the proton transfer (WCP mechanism), is a barrierless process, indicating that the formation of the adduct intermediate, the first reaction step, is rate-limiting. The reaction products are free hydroxymethyl phenols and/or hydroxybenzy carbocation (HOC6H4CH2+) which plays an important role in the following formation of methylene and methylene ether linkages. The second addition reactions between formaldehyde and hydroxymethyl phenol at all possible reaction sites of the phenol ring in acid solution were also investigated and discussed.     

氯化磷酸二苯酯的合成和结构表征

以苯酚、三氯氧磷为原料,以无水三氯化铝为催化剂合成了氯化磷酸二苯酯;采用正交试验研究了反应温度、反应时间、催化剂用量和原料配比对反应收率的影响,确定了最佳工艺条件;并利用红外光谱和核磁共振谱表征了产物的结构.结果表明,影响反应收率的几种因素的排序为:反应温度>原料配比>催化剂用量>反应时间;最佳反应条件为:温度70℃、反应时间15h、原料配比(n苯酚∶n三氯氧磷)2∶1、催化剂用量0.8g(相对于苯酚的质量分数为4.25%).与此同时,采用加水后处理方法可以提高产品收率和可操作性.     

Kinetics and reaction mechanism of phenol hydroxylation catalyzed by La-Cu_4FeAlCO_3

Phenol hydroxylation is an industrially important reaction, whose main products are catechol and hy-droquinone being diverse applications which are im-portant intermediates for perfumes, drugs, and phar-maceuticals and so on[1]. The processes using H2O2 a…     

用甲基叔丁基甲醚对苯酚叔丁基化的反应研究

目前我国生产对叔丁基苯酚的方法通常以酚类为原料，烯烃或醚类为烷基化试 剂，其中异丁烯是主要烷基化试剂，但异丁烯在储存、运输等方面存在着一定的弊 端．采用直接以甲基叔丁基甲醚为烷基化试剂，研究了苯酚与甲基叔丁基甲醚的烷 基化反应．并对各影响因素进行了讨论，其中催化剂用量和原料比对反应影响最大 ，温度次之，反应时间影响最小．实验中得出了制备反应的最佳条件；苯酚转化率 大于85％，对叔丁基苯酚产率为78％，得到较理想产率．并与以异丁烯为烷基化试 剂进行了比较，具有成本低、流程短、操作简便、安全等特点，应用前景非常好．     

Determination of kinetic parameters and potential residence of phenol degradation on C-felt electrode

The electrooxidation of phenol has been studied on C-felt electrode by using cyclic voltammetry (CV) technique. The kinetic parameters electrooxidation reaction such as oxidation potential at zero scan rate (E ₀), temperature coefficient (dE/dt), reaction order (n), activation energy (E _a), calculated from variation of oxidation peak potentials and current with potential scan rate, phenol concentration and related temperature. Phenol reaction path way (either degradation or polymerization and forming high molecular weight species) and potential residence of phenol degradation are determined by applying different electrolysis voltage values (0.630, 1, 2 and 3 V) in acidic phenol solution (0.0125 M Phenol + 0.5 M H₂SO₄). In addition, decrease in the phenol concentration is monitored in this solution during 6 hours with 1 hour time period and from this data linear relation ship was found to between applied potential and phenol removal efficiency. Published in Russian in Elektrokhimiya, 2009, Vol. 45, No. 3, pp. 281–288. The article is published in the original.     

Peroxidase catalyzed polymerization of phenol

effect of horseradish peroxidase (HRP) and H₂O₂ concentrations on the removal efficiency of phenol, defined as the percentage of phenol removed from solution as a function of time, has been investigated. When phenol and H₂O₂ react with an approximately one-to-one stoichiometry, the phenol is almost completely precipitated within 10 min. The reaction is inhibited at higher concentrations of H₂O₂. The removal efficiency increases with an increase in the concentration of HRP, but an increase in the time of treatment cannot be used to offset the reduction in removal efficiency at low concentrations of the enzyme, because of inactivation of the enzyme. One molecule of HRP is needed to remove approximately 1100 molecules of phenol when the reaction is conducted at pH 8.0 and at ambient temperature.     

磷钼钒杂多酸催化苯制苯酚的研究

将磷钼钒杂多酸应用于以过氧化氢作氧化剂,冰醋酸作溶剂的苯一步氧化制苯酚反应中,分别考察了杂多酸、过氧化氢和冰醋酸的用量,以及反应温度和反应时间等因素对苯制苯酚反应的影响,并通过单因素实验方法确定了较为适宜的工艺条件.     

分子氧催化氧化苯直接合成苯酚

苯酚是重要的有机合成中间体,当前主要通过异丙苯法合成苯酚的技术路线存在制备流程长、消耗丙烯、副产丙酮等不足。以分子氧为氧化剂由苯氧化直接合成苯酚则具有潜在重大的经济效益、社会效益和环境效益，已成为催化与有机合成等研究领域中极具挑战性的热点课题之一。本文较为系统地总结了分子氧氧化苯通过一步法合成苯酚的研究工作，着重综述了用于该反应的催化剂如Pd、Cu、V等金属或其化合物，也归纳了影响此反应的主要因素，并介绍相应的反应机理。最后，对分子氧催化氧化苯合成苯酚反应的研究提供了一些建议和展望。     

Al-MCM-48分子筛对苯酚与乙酸异丙酯异丙基化反应的催化性能(英文)

Al-MCM-48 molecular sieves (Si/Al molar ratios = 25, 50, 75, and 100) were synthesized hydrothermally using cetyltrimethyl-ammonium bromide as the structure directing template. The orderly arrangement of mesopores was evident from the low angle X-ray diffraction patterns and transmission electron microscopy images. The catalytic performance of the materials was evaluated in the vapor phase isopropylation of phenol with isopropyl acetate. Phenol conversion decreased with the increase in the Si/Al ratio of the catalysts. The major reaction product was 4-isopropyl phenol with 78% selectivity. The delocalization of phenolic oxygen electron pair over the aromatic ring promoted para-selective alkylation. Such delocalization could be aided by the hydrophilic surface of the molecular sieves. Although an ester was used as the alkylating agent, phenyl isopropyl ether was not formed in the reaction.     

Adsorption-desorption behavior of phenols on novel polymers containing the pyrrolidinone moiety

Crosslinked polymers having a pyrrolidinone moiety (CPS, CPES, and CVP) were synthesized by radical copolymerization of 4-(2-oxo-1-pyrrolidinyl)methylstyrene, 4-[2-(2-oxo-1-pyrrolidinyl)ethoxy]methylstyrene, or 2-vinylpyrrolidinone with divinylbenzene in the presence of AIBN as a radical initiator. The adsorption-desorption behavior of phenols on these polymers was investigated. The polymers with spacers between the polymer main chain and pyrrolidinone moiety appeared to have a superior adsorption capability to those without such spacers. The amount of phenol adsorbed on the polymers in a solvent decreased in the following order: water > chloroform > methanol. In methanol, the interaction between the polymers and phenol was suggested to come only from charge-transfer stacking (C–T stacking), whereas in chloroform the interaction was caused mainly by both hydrogen bonding and C–T stacking. The interaction in water was attributed not only to both hydrogen bonding and C–T stacking, but also to a hydrophobic interaction. Characterization of polymers (CVP) containing adsorbed phenol was carried out by thermogravimetric analysis (TGA). The TGA curves indicated a two step weight-decrease, namely the first step in the temperature ranging from ca. 100-200°C was attributed to the desorption of phenol while the second step in the temperature ranging from ca. 350-500°C was based on thermal decomposition of the polymers. The desorption of phenol adsorbed on the polymers in water indicated an inverse tendency to the adsorption; that is, the amount of phenol desorbed from the polymers without a spacer was more than those from the polymers with spacers. © 1994 John Wiley & Sons, Inc.