FTIR法研究乙酸酚醛酯固化邻甲酚环氧树脂的反应动力学

用ＦＴＩＲ原位测量技术研究了乙酸酚醛酯与邻甲酚环氧树脂在２－甲基咪唑存在下进行恒温固化反应的动力学，测定了固化反应的动力学参数，研究结果表明，固化反应是按照一级固化反应动力学进行的，根据羰基峰在固化反应前后的变化对固化反尖机理进行了初步探讨。     

硝基苯还原羰化反应制备氨基甲酸酯选择性的研究

在硝基苯还原羰化反应和还原反应的竞争中，使用高分了载体，加人第二金属 组分，升高反应温度有利于还原羰化反应的进行．并且实现了利用双金属效应，在 不含有机配体的体系中高选择性地进行硝基苯还原羰化反应．     

担载型过渡金属催化剂上甲烷和乙烯的同系化反应

利用程序升温脉冲反应技术较系统地考察了担载型过渡金属催化剂上甲烷与乙烯同系聚合制丙烯和丙烷的反应，通过分步反应，即首先进行甲烷分解，然后引入了乙烯与甲烷分解产生的表面碳物种反应，可以克服甲烷与乙烯同系聚合物反应的动力学限制，使该反应能在较为温和的条件下进行，还系统地探讨了影响该反应的各种因素，结果表明，Ｐｔ，Ｃｏ催化剂表现出较为优越的催化性能。     

天然气与硫酸盐热化学还原反应的模拟实验研究

为探讨天然气中高含量硫化氢形成的化学机制，利用高温高压反应装置，对天然气与固态硫酸钙反应体系进行了热模拟实验研究。使用气相色谱仪、微库仑仪、傅里叶变换红外光谱仪和X射线衍射仪对产物进行了分析，探讨了硫酸盐热化学还原反应的热力学特征，并进行了反应动力学研究。结果表明，高温下天然气与固态硫酸钙可以发生反应，产物主要为硫化氢、二氧化碳、碳酸钙、水和炭。热力学研究表明，天然气与固态硫酸钙的反应可行，升高温度对反应有利，同一温度下长链烷烃与固态硫酸钙发生反应的可能性要比短链烷烃大。根据动力学模型得到反应活化能为96.824kJ/mol。     

脱氢枞胺键合交联聚苯乙烯树脂的制备

运用高分子反应法，制备脱氢枞胺键合交联聚苯乙烯树脂，反应分三步进行：醚化反应，双键环氧化和脱氢枞胺与环氧基开环反应，探讨了每一步合成的最佳工艺条件，通过红外光谱对该功能高分子进行了结构表征，并对该合成产物进行对映体分离的初步应用。     

1,2,4—三嗪类化合物研究（XXIV）：吡唑并—（5,4—e）—1,2,4—三嗪…

先合成１，２，４－三嗪环，然后并接吡唑环，对标题化合物进行了合成研究，对１，２，４－三嗪环上的硫化反应进行了改进，解决了３个反应活性相近部位的选择性肼解问题，并发现了肼基与乙酸乙酯于室温下反应生成１，３，４－恶二唑环的新反应。     

乙酰乙酸乙酯－BR化学振荡反应的研究

本文首次报道了乙酰乙酸乙酯－ＩＯ－３－Ｈ２Ｏ２－Ｍｎ２＋－Ｈ２ＳＯ４体系的化学振荡反应。研究了各种因素对振荡反应的影响，测定了最佳反应条件及振荡反应的浓度范围。研究了温度变化对振荡反应的影响，并计算了振荡反应的表观活化能，对振荡反应产物进行了分析，并测定了体系主要反应的计量关系，采用ＵＶ法对金属离子的作用和催化机理作了研究，探索了ＢＲ反应中Ｉ２的产生机理及消耗机理，对体系中有关反应物的作用作了说明。在ＦＫＮ机理的基础上，对ＢＲ反应的自催化反应步骤和控制机理进行了初步的探索，并对有关实验现象作了说明。     

乙烯基炔与一氧化氮反应机理的理论探讨

利用半经验AM1方法，研究了乙烯基乙炔与一氧化氮反应生成丙炔腈（反应1）和丙烯腈（反应2）的两条竞争反应途径．采用Berny梯度法优化得到了反应势能面上的所有驻点，并逐一进行了振动分析确认．结果表明，反应互较反应Ⅱ易引发（即；NO比较容易与乙烯基乙炔进行分步的1，4-加成，形成六元环过渡态及中间体，最终消除CH2O和H自由基后生成丙炔腈），而反应Ⅱ较难引发（NO与乙烯基乙炔较难进行1，2-加成，形成四元环过渡态及中间体），但一经引发，就能较容易地进行分步裂解，生成丙烯腈和CHO自由基．     

改进的Ugi法合成胺烷基二茂铁衍生物的反应研究

在改进的Ugi法会成胺烷基二茂铁衍生物的反应中，研究了反应的投料比、反应底物、反应温域等因素对反应的影响，并对反应机理进行了探讨。     

异丁烷与丁烯烷基化反应的热力学分析

对异丁烷与丁烯烷基化反应进行了较为详尽的热力学分析和计算，得到了不同反应温度下的焓值、吉布斯自由能和反应平衡常数，并且对温度、压力和惰性物质对热力学平衡的影响进行了分析。得到了详细的烷基化反应热力学基础数据，这些数据对研究异丁烷与丁烯的烷基化反应具有重要的参考价值。     

EXTRACTION OF CITRIC ACID FROM FERMENTATION BROTH USING ION—EXCHANGE METHOD

A number of ion-exchange resins were tested on their capacity to adsorb citric acid,among them resin 335,d315, Amberlite IRA-35 and IRA-68 exhibited higher adsorption capacity.We chose resin 335 and D315 to be used for extraction of citric acid from fermentation broth,followed by elution with 10% ammonia liquor,decoloration with K-15 carbon and removal of ammonia with resin 732,converting citrate of free citric acid with a concentration of 10% and an amount of readily carbonizable substance meeting the GB 8269-87 standard.     

Adsorption equilibrium and heat of phenol onto aminated polymeric resins from aqueous solution

Aminated polystyrene resins (NDA-101 and NDA-103) were synthesized, and their adsorption performances for phenol in aqueous solution were investigated and compared with the commercial polystyrene resin (Amberlite XAD-4) and weakly basic polystyrene resin (Amberlite IRA-96). All the associated adsorption isotherms are well described by Freundlich and Langmuir equations. The results indicated that all the four resins spontaneously adsorb phenol driven mainly by enthalpy change, and their adsorption capacities, free energy changes, enthalpy changes, and entropy changes for phenol followed the same order as: NDA-101 > NDA-103 > XAD-4 > IRA-96. Surface energy heterogeneity analysis by Do's model also suggested that the surfaces of XAD-4 and IRA-96 were more homogeneous, and the better adsorption capacity and affinity of the aminated resins (NDA-101 and NDA-103) are probably due to their multiple hydrogen bonding and π–π stacking interactions with phenol molecule.     

强碱性树脂IRA-400对富马酸吸附性能的研究

通过静态吸附试验,研究了强碱性树脂IRA-400对富马酸的吸附性能。结果表明,该树脂与弱碱性树脂IRA-94相比,受pH值影响较小,在pH=3.5时,该树脂对富马酸具有较好的吸附性能,其静态饱和吸附容量为1.466mmol/g湿树脂;该树脂对富马酸的吸附等温线符合Freundlich等温方程,在298.15K,308.15K和318.15K下的相关系数R2均大于0.99,方程的特征参数n1,属"优惠吸附";吸附过程ΔG0,ΔS0,ΔH0,表明此反应过程是放热的,自发进行的,降低温度有利于吸附反应的发生;吸附动力学研究表明,IRA-400树脂对富马酸的吸附过程主要受液膜扩散控制。     

阴离子功能化大孔树脂用于二氧化硫的多位点高效捕集

提出了一种针对大孔树脂阴离子功能化的新策略并合成了一系列阴离子功能化大孔树脂[IRA-900][An],在20 ℃和101.3 kPa的吸附条件下实现了对SO₂的超高吸附容量(> 10 mmol·g^-1)。和常规唑基阴离子功能化大孔树脂相比,聚咪唑基硼酸阴离子功能化的大孔树脂[IRA-900][B(Im)₄]在低压条件下仍然展现了卓越的SO₂捕集能力。吸附实验发现,[IRA-900][B(Im)₄]在10.13 kPa和20 ℃的低压环境中能够保持10.62 mmol·g^-1的超高SO₂吸附量。通过红外谱学研究以及密度泛函理论(DFT)计算来进行吸附机理探究,发现聚唑基硼酸阴离子[B(Im)₄]具有独特的正四面体构型,从而打破了阴离子上N负位点之间的电子流动和共轭效应。在[IRA-900][B(Im)₄]捕集SO₂过程中,阴离子连续和SO₂分子发生化学相互作用时,吸附焓变无明显下降。因此,一个[B(Im)₄]阴离子能够提供四个有效的作用位点和SO₂发生化学吸附作用,从而在低压条件下,[IRA-900][B(Im)₄]仍然实现了超高的SO₂捕集能力。此外,我们对阴离子功能化大孔树脂[IRA-900][B(Im)₄]在低压条件下对SO₂吸附的循环稳定性做了探究。结果发现,在20 ℃和10.13 kPa的吸附环境中以及70 ℃的脱附条件下,[IRA-900][B(Im)₄]展现了良好的循环稳定性,具有极大的工业应用价值。最后,这种阴离子功能化的策略以及多位点捕集方法对实现烟气环境中SO₂的高效捕集开拓了新的思路。     

EXTRACTION OF CITRIC ACID FROM FERMENTATION BROTH USING ION-EXCHANGEMETHOD

1.INTRODUCTIONCitricacidiswidelyusedinfood,Pharmaceuhcalandchemicalindustries,whichProduchonranksfirstamongorganicacidsandisexpectedtoconhnuetogrowinthefutUre.InChinacitricacidismoshyProducedbycalciumcitratePrecipitationmethod.TheteclmologyismatUreanddependable,howevercomplex,expensiveandgeneraiCsasubstanhalamountofwastefordisposal.Incontrasttheion-exchangemethodhastheadVantagesoflowrawmaterialsandenergyconsumphon,feasibilityofcontinuousoperationandnogenerahonofwastesludge.Inthisrespe…     

IRA-200 resin-supported platinum(II) complex for photooxidation of olefins

Cyclometalated platinum(II) 4,6-diphenyl-2,2′-bipyridine complex is supported on a commercially available cationic ion-exchange resin (amberlite IRA-200). Photophysical and ESR determinations indicate that the combined photosensitized system is able to generate singlet oxygen with high quantum yield upon irradiation of light in the visible region. The platinum(II) complex loaded on IRA-200 resin is stable and the photooxidation occurs in an environmentally friendly way. Only a simple filtration is needed to recycle the expensive metal catalyst.     

Oxidation of alcohols with sodium periodate catalyzed by supported Mn(III) porphyrins

The mild and efficient oxidation of alcohols with sodium periodate catalyzed by manganese(III) tetrakis(p-sulfonatophenylporphyrinato) acetate, [Mn(TPPS)], supported on polyvinylpyridine, [Mn(TPPS)-PVP], and Amberlite IRA-400, [Mn (TPPS)-Ad IRA-400], at room temperature is reported. The catalysts used in this study showed high activity not only in the oxidation of benzylic and linear alcohols but also in the oxidation of secondary alcohols at room temperature. These catalysts can be reused several times without significant loss of their activity.     

Amberlite IRA-400 Cl resin catalyzed synthesis of secondary amines and transformation into N-((1H-indol-3-yl) (heteroaryl) methyl)-N-heteroaryl benzenamines and bis-indoles via multicomponent reaction

A one-pot Amberlite IRA-400 Cl resin catalyzed the in-situ generation of imines from various aldehydes and primary amines followed by reduction with sodium borohydride affording corresponding secondary amines. The secondary amines thus obtained were utilized for the IRA-400 Cl resin catalyzed multicomponent synthesis of 3-aminoalkylated indoles using a number of aldehydes and indole. Mild condition, easy work-up, and environmentally benign nature of the synthetic strategy make it both practical and attractive.     

Evaluation of anion exchange resins for plutonium-uranium separations in nitric acid

Pellicular, macroreticular and microreticular (gel-type) anion exchange resins were compared for the separation of plutonium from nitric acid solutions of mixed plutonium-uranium. AS Pellionex SAX (pellicular resin) and Amberlite IRA-93 (weak base macroreticular anion exchange resin) were found to have better uranium washing and plutonium eluting characteristics than any of the resins tested. However, the capacity of the pellicular resin was much lower than the other resins.     

Adsorption behaviour of scandium,yttrium, cerium and uranium from xylenol orange solutions onto anionexchange resins

The effects of concentration, pH and anions on the adsorption behaviour of xylenol orange (XO) on the strong anion exchangers, Amberlite IRA-400 and Hitachi 2632 are described. The adsorption behaviour of the XO complexes of Ce(III), Y(III), Sc(III) and U(VI) on the Amberlite IRA-400 resin as a function of XO concentration and pH is reported. A continuous-flow radiometric detector is used to investigate the separations of the Ce(III)—Sc(III), Y(III)—Sc(III), and Ce(III)—Y(III) pairs on the XO-form Hitachi 2632 resin column by pH control. Satisfactory separations of the Ce(III)—Sc(III) and Y(III)—Sc(III) pairs are achieved.