稀土固体超强酸SO_4~(2-)/TiO_2/La~(3+)催化合成富马酸二甲酯

以固体超强酸ＳＯ_４~(２－)／ＴｉＯ_２／Ｌａ~(３＋)为催化剂,富马酸和甲醇为原料合成富马酸二甲酯,考察了影响反应的因素。结果表明：ｎ（醇）：ｎ（酸）＝６：１;催化剂用量为对０．１ｍｏｌ富马骏耗１．０ｇ催化剂,二氯甲烷为溶剂;在回流温度下反应４ｈ,酯化率达９４％以上。     

稀土固体超强酸SO^2—4／TiO2／La^3＋催化合成异丁酸丁酯

研究了以稀土固体超强酸ＳＯ＾２－４／ＴｉＯ２／Ｌａ＾３＋为催化剂，异丁酸和正丁醇为原料合成异丁酸丁酯，并考察了影响反应的因素。结果表明，醇酸比为１．８１：１，催化剂用量为０．５ｇ，带水剂甲苯为１５ｍｌ，反应时间为２．０ｈ是最适宜的反应条件，酯化率达９７．２％。     

固体超强酸ZrO2-SO42-催化合成核黄素四乙酸酯

对固体超强酸ＺｒＯ_２－ＳＯ_４~（２－）催化合成核黄素四乙酸酯进行了研究。核黄素与乙酸酐摩尔比１：４０,催化剂用量为反应物总质量的８．０％,反应温度８０℃,反应时间２．５ｈ,核黄素四乙酸酯产率可达７６．９％。ＺｒＯ_２ＳＯ_４~￣（２-）催化活性高于ＴｉＯ_２－ＳＯ_４~（２－）和Ｆｅ_２Ｏ_３－,ＳＯ_４~（２－）ＺｒＯ_２在１ｍｏｌ／ＬＨ_２ ＳＯ_４中浸渍 ２４ｈ,６００℃焙烧 ３ｈ催化活性最高。     

固体超强酸T：O_2／SO_4~(2-)催化合成水杨酸乙酯

研究了以固体超强酸Ｔ：Ｏ＿２／ＳＯ＿４￣（２－）为催化剂，水杨酸和乙醇为原料合成水杨酸乙酯，并考察了醇酸比、催化剂用量、反应时间、反应温度对酯产率的影响。结果表明，在水杨酸用量为０．１ｍｏｌ的情况下用固体超强酸Ｔ：Ｏ＿２／ＳＯ＿４￣（２－）为催化剂，催化剂用量为１．０克，乙醇与水杨酸的摩尔比为３：１或４：１，反应时间为５小时，反应温度９５一１００℃是最适宜的反应条件，酯产率达８９％。并且同硫酸相比，固体超强酸Ｔ：Ｏ＿２／ＳＯ＿４￣（２－）有许多优点：产品容易从催化剂中分离，后处理方便，减少废液，降低动力消耗，具有很好的经济性。     

二高氯酸四（2－羟基吡啶）二水合钴的单晶制备及结构分析

２－羟基吡啶（ＨＬ）、Ｔｂ（ＣｌＯ_４）_３·６Ｈ_２Ｏ和Ｃｏ（ＣＨ_３ＣＯＯ）_２·４Ｈ_２Ｏ在乙腈中反应，制备了［Ｃｏ（ＨＬ）_４（Ｈ２Ｏ）_２］（ＣｌＯ_４）_２，并且测定了它的晶体结构。［Ｃｏ（ＨＬ）_４（Ｈ_２Ｏ）_２］（ＣｌＯ_４）_２的晶体为单斜晶系，ｐ２１／ｎ空间群，晶胞参数为α＝０．９３１３（３）ｎｍｂ＝１．１５８６（１）ｎｍ，ｃ＝１．２９８４（２）ｎｍ，β＝９７．２４（２）°。［Ｃｏ（ＨＬ）_４（Ｈ_２Ｏ）_２］￣（２＋）为六配位畸变八面体构型，２－羟基吡啶的氧原子同钴配位。     

固体超强酸SO2-4/TiO2/La3+催化合成己酸乙酯

研究了以固体超强酸ＳＯ＾２－／ＴｉＯ２／Ｌａ＾３＋为催化剂,己酸和无水乙醇为原料合成己酸乙酯,并考察了影响反应的因素,结果表明,醇酸比为２．０：１,催化剂用量为０．５ｇ（己酸为０．２ｍｏｌ的情况下）,带水剂苯为１５ｍＬ,反应时间为２．０ｈ是最适宜的反应条件,酯化率达９６．８％。     

稀土固体超强酸SO^2—4／TiO2／La^3＋催化合成马来酸二丁酯

以固体超强酸ＳＯ＾２－４／ＴｉＯ２／Ｌａ＾３＋为催化剂,马来酸和正丁醇为原料合成马来酸二丁酯,考察了影响反应的因素,结果表明：ｎ（醇）：ｎ（酸）＝４．０：１,催化剂用量为１．０ｇ;带水剂甲苯为１５ｍＬ;反应时间为３．０ｈ是最的反应条件,酯化率达９７．４％。     

稀土固体超强酸SO2-4/TiO2/La3+催化合成丁酸乙酯

研究了以固体超强酸ＳＯ４＾２－／ＴｉＯ２／Ｌａ＾３＋为催化剂,丁酸和无水乙醇为原料合成丁酸乙酯,并考察了影响反应的因素。结果表明,醇酸摩尔比为２．０：１,催化剂用量的０．５ｇ（丁酸为０．２ｍｏｌ的情况下）,带水剂苯为１５ｍＬ,反应时间为２．０ｈ,是最适宜的反应条件,酯化率达９５．６％。     

稀土固体超强酸SO4^2—／TiO2／La^3＋催化合成丁酸丁酯

研究了以稀土固体超强酸ＳＯ４＾２－／ＴｉＯ２／Ｌａ＾３＋为催化剂,丁酸和正丁醇为原料合成丁酸丁酯,并考察了影响反应４ 因素。结果表明,醇酸物质的量比为１．８：１,催化剂用量为０．５ｇ（本酸为０．２ｍｏｌ的情况下）,带水剂甲苯为１５ｍＬ,反应时间为２．０ｈ是合成丁酸丁酯的较适宜的反应条件,酯化率达９８．６％。     

SO_4~（2－）／TiO_2型催化剂的制备及在Dnop中的应用

ＳＯ_４~（２－）／ＴｉＯ_２型催化剂的制备及在Ｄｎｏｐ中的应用于淑萍，姚培正，邓宇（天津化工学校３００４０２）（天津轻工业学院３００２２０）１．前言随着日用化工、塑料、橡胶工业迅速发展，一些酯化产品也随之发展起来，然而这类酯化产品常用的催化剂目前尚有?..     

Fe~(3 )、Zn~(2 )、Mn~(2 )、Cu~(2 )、Ca~(2 )、Mg~(2 )等离子共存体系中Ca~(2 )、Mg~(2 )的测定

叙述了Fe3 、Zn2 、Mn2 、Cu2 、Ca2 、Mg2 等离子共存体系中采用六次甲基四胺 -铜试剂沉淀除去Fe3 、Zn2 、Mn2 、Cu2 等干扰离子 ,用EDTA滴定钙镁的方法 ,该方法钙的回收率在 99.7%～ 10 0 .3 % ;镁的回收率在 10 0 .0 %～ 10 0 .4% ,标准偏差为 0 .0 2 2。     

Ag(I)(Et(2)PCH(2)CH(2)PPh(2))(2)]NO(3): An Antimitochondrial Silver Complex

The silver(I) complex [Ag(eppe)(2)]NO(3) (eppe = Et(2)PCH(2)CH(2)PPh(2)) is shown by X-ray crystallography to be tetrahedral with Ag - PEt(2) and Ag - P Ph(2) bond lengths of 2.482 and 2.518 A, respectively. The complex is selectively antimitochondrial and inhibits the growth of a number of yeast strains in non-fermentable media at concentrations as low as 2.5 muMu and induces the mitochondrial mutation petite The effect is largely reversed by the presence of aspirin. The complex is shown to be stable in the cell culture media and in the presence of glutathione, but readily reacts with disulfides of oxidized glutathione and serum albumin. Surprisingly, neither [Au(eppe)(2)]Cl nor [Au(eppe)(2)]Cl (dppe = Ph(2)PCH(2)CH(2)PPh(2)) showed any mitochondrial selectivity in the same screening protocol.     

Interaction of [Rh(2)(O(2)CCH(3))(4)(H(2)O)(2)] and [Rh(2)(O(2)CCH(OH)Ph)(2)(phen)(2)(H(2)O)(2)](O(2)C-CH(OH)Ph)(2) With Sulfhydryl Compounds and Ceruloplasmin

The interaction of binuclear rhodium(II) complexes [Rh(2)(OOCCH(3))(4)(H(2)O)(2)], [Rh(2){OOCCH(OH)Ph}(2)(phen)(2)(H(2)O)(2)] {OOCCH(OH)Ph}(2), [Rh(2)(OOCCH(3))(2)(bpy)(2)(H(2)O)(2)](OOCCH(3))(2) and [Rh(2)Cl(2)(OOCMe)(2)(bpy)(2)](3H(2)O) with ceruloplasmin, cysteine, glutathione and coenzyme A have been investigated using. UV-Vis and CD spectroscopies. The complexes containing phen or bpy at pH = 7.4 and 4.0 are readily reduced with sulfhydryl compounds, while rhodium(II) acetate is relatively stable in these conditions. Complex [Rh(2){OOCCH(OH)Ph}(2)(phen)(2)(H(2)O)(2)] strongly changes structure of ceruloplasmin leading to the decrease of of alpha-helix content and loss of oxidase activity.     

Copper (2+), Zinc (2+), and Nickel (2+) Uptake by Activated Sludge

Abstract

This paper reports the results obtained on copper, zinc, and nickel uptake by activated sludge in a completely mixed unit. Removal of these heavy metals from wastewater occurs by uptake and by precipitation, the latter being particularly important in the cases of copper and zinc. The amount of heavy metal taken up by the microorganisms at equilibrium varies with influent concentration for the three metals studied. The values obtained range from 2.3 mg/g VSS for copper at 1 mg/L in the influent to 57.4 mg/g VSS for nickel at influent 25 mg/L. Soluble metal removal from wastewater increases in percentage with influent concentration, being higher for copper and lower for nickel. Experiments with mixtures of these metals have also been carried out.     

氨噻肟酸与AE—活性酯

我国氨噻肟酸的总产量为300-400t/a,产品大部分用于生产AE-活性酯,部分直接出口。在氨噻肟酸生产中如何对反应过程进行实时监控,利用液氯替代价格较高同时危险性较大的液溴,以及如何控制氨噻肟酸产物中顺反异构体的比例、阻止二聚体的生成是今后有待解决的问题;在AE-活性酯的生产中,利用价格较低的原料代替昂贵的三苯基膦将对降低生产成本起到决定性的作用。     

N（2—甲苯基）—2—（2—甲苯氧乙酰基）氨基脲的合成

以固体氢氧化的钠作催化剂,用Ｎ－（２－甲苯基）三氯乙酰胺与２－本氧乙酰肼反应,合成一种新的氨基脲。     

H(2)O(2) in CO(2): sustainable production and green reactions

Hydrogen peroxide is a "green" oxidant whose relatively high cost has prevented it from being applied to commodity chemical processing. Interestingly, those attributes of the current H(2)O(2) process that contribute to the high cost also contribute to its nonsustainable features. We have consequently explored the generation of hydrogen peroxide both by the AQ route and directly from hydrogen and oxygen using liquid CO(2) as the solvent, because CO(2) provides some unique advantages to H(2)O(2) synthesis.     

2-(2-氯苄基)-2-(1-氯环丙基)环氧乙烷的合成

报道了丙硫菌唑中间体2-(2-氯苄基)-2-(1-氯环丙基)环氧乙烷的合成方法。以1-氯-N,N-二甲基环丙基甲酰胺和邻氯氯苄为原料,经格氏反应制备2-氯苄基-(1-氯环丙基)酮;后者再与硫叶立德试剂反应得到相应的环氧化物。     

A new binuclear Cr(III) citrate anion: Synthesis,characterization and crystal structure of [Cr(CO(NH2)2)6]2[Cr2(CO(NH2)2)2(C6H4O7)2]3

The new anion [Cr₂(CO(NH₂)₂)₂(C₆H₄O₇)₂]^2 − has been isolated in the complex [Cr(CO(NH₂)₂)₆]₂[Cr₂(CO(NH₂)₂)₂(C₆H₄O₇)₂]₃. The crystals of this complex were obtained by a one-pot synthetic method using 1:1 molar ratio of hexaureachromium(III) chloride and trisodium citrate in aqueous medium. It was characterized by elemental analysis, IR spectroscopy and single crystal X-ray diffraction analysis. The compound crystallizes in space group R‾3 of the trigonal system with three formula units in a cell of dimensions a = b = 24.7461(4) Å, c = 13.7204(3) Å and γ = 120°. The crystal structure comprises the columns consisting of [Cr(CO(NH₂)₂)₆]^3 + cations surrounded by a cylinder of complex anions, [Cr₂(CO(NH₂)₂)₂(C₆H₄O₇)₂]^2 − which are packed in a honeycomb-like manner. This supramolecular architecture is formed and stabilized by inter- and intramolecular NH⋯O hydrogen bonds.