A Novel and Convenient Process for the Selective Oxidation of Naphthalenes with Hydrogen Peroxide

A practical ruthenium phase‐transfer catalyst (Ru‐PTC) system for the oxidation of naphthalene derivatives has been developed. Substituted 1,4‐quinones are obtained in good selectivity and yield in water without the addition of any organic solvent and acid. By applying the optimized conditions the feed additive menadione (vitamin K₃) is obtained from 2‐methylnaphthalene with 64 % yield and 73 % selectivity.     

过氧化氢氧化苯制苯酚的催化剂研究进展

综述了过氧化氢直接氧化苯制苯酚过程中相关催化剂的研究进展，重点介绍了ZSM系列和TS系列催化剂、含铁和含铜催化剂以及钒取代杂多酸盐催化剂，同时给出了各种催化剂所达到的收率和选择性；最后探讨了这些新型催化剂的工作应用前景以及今后研究的方向。     

Aerobic Oxidation of Glucose with Gold Catalyst: Hydrogen Peroxide as Intermediate and Reagent

Careful analytical determinations show that the gold‐catalysed aerobic oxidation of glucose occurs through a two‐electrons mechanism leading to gluconate and hydrogen peroxide. This latter decomposes before reaching the critical concentration for competing with O₂ in glucose oxidation. A mechanism of glucose oxidation on gold nanoparticles is presented.     

空化水射流结合双氧水降解苯酚(英文)

The paper presents results of phenol oxidized under the conditions of high temperature created during collapse of cavitation bubbles.The degradation efficiency has been greatly improved by using cavitation water jets combined with H2O2 as demonstrated in laboratory tests.Various factors affecting phenol removal ratio were ex-amined and the degradation mechanism was revealed by high performance liquid chromatography(HPLC).The re-sults showed that 99.85% of phenol was mineralized when phenol concentration was 100 mg·L-1 with pH value of 3.0,H2O2 concentration of 300 mg·L-1,confining pressure of 0.5 MPa,and pumping pressure of 20 MPa.The in-termediate products after phenol oxidation were composed of catechol,hydroquinone and p-benzoquinone.Finally,phenol was degraded into maleic acid and acetic acid.Furthermore,a dynamic model of phenol oxidation via cavi-tation water jets combined with H2O2 has been developed.     

脱氢枞胺磷钨酸盐催化1-辛烯的氧化反应研究

以脱氢枞胺（DHA）与Keggin型磷钨酸（HPW）反应制备脱氢枞胺磷钨酸盐（DHPW）．运用红外光谱、紫外光谱对其结构进行表征,并以催化H2O2氧化1-辛烯为探针反应,考察脱氢枞胺磷钨酸盐的催化性能。结果表明,脱氢枞胺磷钨酸盐具有氧化-酸双功能催化作用,能催化H202氧化1-辛烯生成1,2-环氧辛烷、1,2-二羟基辛烷和2-羟基辛烷;在无溶剂或极性溶剂中,1,2-环氧辛烷易发生环氧开环水解反应。选择性较低;在非极性溶剂中,1,2-环氧辛烷的选择性较高．在1,2-二氯乙烷用量为5mL、1-辛烯用量为5mmol、催化剂用量为0．075g、H202用量为5．0mmol、反应温度为30℃、反应时间为3h的条件下。1,2-环氧辛烷的选择性最高,达到90．0％。     

双氧水工作液中成分的GCMS分析

利用ＧＣＭＳ对蒽醌法生产双氧水的工作液成分分行了分析。该方法定性定量分析准确，条件选择适当，组份分离完全，并发现三种二乙基蒽醌的降解物。     

湿式催化过氧化氢氧化法处理腈纶废水的研究

以某石化公司腈纶厂生产废水作为主要研究对象,开展石化腈纶废水中难降解有机污染物的湿式催化过氧化氢氧化技术研究,对于有效削减腈纶废水中有毒有害污染物,实现石化行业腈纶废水达标排放具有十分重要的意义。通过对所得样品的表征和结构分析,确定了制备CeO_2/SBA-16的最佳合成条件:硅源和铈源投加量固定为4.71和4.71 g、搅拌时间固定为3 h、微波120 min。以合成的CeO_2/SBA-16介孔分子筛催化剂对该石化公司腈纶厂丙烯腈废水进行湿式催化过氧化氢氧化工艺处理,并确定了湿式催化过氧化氢氧化处理该丙烯腈废水的最佳条件为:CeO_2/SBA-16投加量为1.2 g、H_2O_2投加量为0.28 mL、反应时间为160 min、微波辐射温度为120℃。在此工艺条件下,该丙烯腈废水COD浓度由2 000 mg/L以上下降至500~600 mg/L,去除率可达到70%以上,取得了明显的去除效果。     

过氧化氢与臭氧联合氧化法合成壬二酸

对以过氧化氢和臭氧联合为氧化剂,由油酸制备壬二酸的工艺进行了研究,并讨论了过氧化氢的浓度及用量、通入臭氧的浓度、时间以及考察了不同种类钨化合物与季铵盐组成的相转移催化体系催化氧化油酸的反应活性。结果表明:当温度为70℃,20 g油酸,0.6 g磷钨酸,0.7 g十六烷基三甲基溴化铵(CTAB),滴加30%过氧化氢60 mL,通入臭氧时间为8 h,壬二酸的收率为71%。     

双氧水的热危险性及铁离子掺杂对其热稳定性的影响研究

为研究双氧水的热危险性并定量考察三价铁离子掺杂对其热稳定性的影响,作者利用C600微量量热仪对35%双氧水(质量分数)的热分解特性进行了研究,得到了其在绝热条件下达到最大反应速率所需时间;并研究了无三价铁离子及三价铁离子质量分数为0.005%、0.01%及0.02%时的35%双氧水(质量分数)的热分解特性,得到了三价铁离子掺杂对双氧水热稳定性的影响。研究表明,为保证双氧水在一般环境条件下安全稳定存储,需控制温度在40℃以下,并应控制双氧水中的三价铁离子含量。     

广西、广东两省双氧水市场分析

文章介绍了双氧水产品及其应用领域,概述了双氧水的国内生产与市场状况,分析了广西广东两地双氧水的生产和消费情况。市场分析结果表明两广地区对双氧水的消费量相差较大,广西区内的双氧水市场供大于求,广东省的双氧水市场供应量不足,预计广西广东对双氧水的耗用量将会逐年递增,本公司将通过扩建双氧水产能来满足两地日益增长的双氧水市场需求。     

C3‐Symmetric Titanium(IV) Triphenolate Amino Complexes for a Fast and Effective Oxidation of Secondary Amines to Nitrones with Hydrogen Peroxide

The efficient catalytic oxidation of secondary amines to nitrones using hydrogen peroxide as primary oxidant is described. The titanium(IV) complex 2 bearing a C₃‐symmetrical triphenolate amino ligand has proved to be an air‐ and water‐tolerant complex that efficiently catalyzes secondary amine oxidations at 60 °C without previous activation [catalyst loading as low as 0.01%, yields up to 99%, turnover numbers (TONs) up to 8000 and turnover frequencies (TOFs) up to 11000 h⁻¹).     

蒽醌法生产双氧水氧化尾气的节能处理

介绍蒽醌法生产双氧水装置中，用活性炭纤维吸附和透平膨胀制冷两种技术处理氧化尾气的原理、工艺流程。通过对用两种技术的两套尾气处理装置的比较，指出现阶段透平膨胀制冷技术是一项高效节能技术，在蒽醌法生产双氧水装置上具有良好的应用前途。     

Oxidation of hydrocarbons by hydrogen peroxide over Ti catalysts: Kinetics and mechanistic studies

n-hexane conversion to hexanols and hexanones as well as the conversion of 2- and 3-hexanol to 2- and 3- hexanone, by reaction with aqueous hydrogen peroxide on titanium silicalite were the objects of kinetic investigations. The choice of these reactions is justified on the basis of an analysis of literature dealing with partial oxidation reactions performed on Ti sites in silica environments. The kinetic analysis based on equations derived using the mathematical theory of linear graphs allows several conclusions on the nature of surface intermediates and on the reaction mechanism. These conclusions are discussed in terms of the partial oxidation of organic materials by hydrogen peroxide over Ti catalysts. This review paper relies mostly on work by the authors and it intends to make an integrated presentation of the kinetics of some critically significant catalytic oxidation reactions. The content was the subject of a plenary lecture at the 5^th symposium of the Romanian Catalysis Society.     

双氧水引发下淀粉／丙烯腈接枝聚合物的制备与分析

以淀粉为原料,在双氧水的引发下,与丙烯腈进行接枝反应制备淀粉接枝聚合物。考察了温度、时间、引发剂浓度、接枝剂浓度等单因素对接枝率的影响。对影响接枝反应的各种因素,如反应物的用量、反应时间、引发剂浓度等进行了深入细致的分析探讨,由正交试验确定出双氧水为引发剂,进行淀粉接枝反应的最佳工艺条件为：反应温度85℃,反应时间3h,料液比1：100,引发剂浓度17．143mmoL／L,丙烯腈浓度0．114mmol／L。     

用UV/H2O2,UV/O3,UV/H2O2/O3催化处理城市固体垃圾填埋渗出物

The performance of UV/H2O2, UV/O3, and UV/H2O2/O3 oxidation systems for the treatment of municipal solid-waste landfill leachate was investigated. Main objective of the experiment was to remove total organic carbon (TOC), non-biodegradable organic compounds (NBDOC) and color. In UV/H2O2 oxidation experiment, with the increase of H2O2 dosage, removal efficiencies of TOC and color along with the ratio of biochemical oxygen demand (BOD) to chemical oxygen demand (COD) of the effluent were increased and a better performance was obtained than the system H2O2 alone. In UV/H2O2 oxidation, under the optimum condition H2O2 (0.2 time), removal efficiencies of TOC and color were 78.9% and 95.5%, respectively, and BOD/COD ratio was significantly increased from 0.112 to 0.366. In UV/O3 oxidation, with the increase of O3 dosage, removal efficiencies of TOC and color along with BOD/COD ratio of the effluent were increased and a better performance was obtained than the system O3 alone. Under the optimum condition UV/O3     

Oxidation of N,N‐Disubstituted Hydroxylamines to Nitrones with Hydrogen Peroxide Catalyzed by Polymer‐Supported Methylrhenium Trioxide Systems

Poly(4‐vinylpyridine)/methylrhenium trioxide (MTO) compounds I III and microencapsulated polystyrene/MTO systems IV V are efficient catalysts for the oxidation of secondary hydroxylamines to the corresponding nitrones with H₂O₂. Complete conversions of substrates and quantitative yields of products are obtained under environmentally friendly experimental conditions and with the use of simple work‐up procedures. Symmetrically substituted hydroxylamines, and non‐symmetrical 3‐substituted and 2‐substituted hydroxypyrrolidines, precursors of nitrones applied in the synthesis of alkaloids and biologically active congeners, have been considered as substrates. The heterogeneous catalysts are stable under the reaction conditions and can be recovered and recycled for at least five times without any appreciable loss in efficiency.     

Mass Spectral Filtering by Mass-Remainder Analysis (MARA) at High Resolution and Its Application to Metabolite Profiling of Flavonoids

Flavonoids represent an important class of secondary metabolites because of their potential health benefits and functions in plants. We propose a novel method for the comprehensive flavonoid filtering and screening based on direct infusion mass spectrometry (DIMS) analysis. The recently invented data mining procedure, the multi-step mass-remainder analysis (M-MARA) technique is applied for the effective mass spectral filtering of the peak rich spectra of natural herb extracts. In addition, our flavonoid-filtering algorithm facilitates the determination of the elemental composition. M-MARA flavonoid-filtering uses simple mathematical and logical operations and thus, it can easily be implemented in a regular spreadsheet software. A huge benefit of our method is the high speed and the low demand for computing power and memory that enables the real time application even for tandem mass spectrometric analysis. Our novel method was applied for the electrospray ionization (ESI) DIMS spectra of various herb extract, and the filtered mass spectral data were subjected to chemometrics analysis using principal component analysis (PCA).     

氮化铝和莫来石陶瓷衬底的SIMS和XRD研究

利用二次离子质谱（ＳＩＭＳ）和Ｘ射线衍射（ＸＲＤ）研究了用于电子封装的以Ｄｙ２Ｏ３,ＣａＯ为添加剂的ＡＬＮ和以堇青石,ＢａＣＯ３为添加剂的莫来石陶瓷衬底的物相组成和表面成分,尤其是表面杂质,并利用ＳＩＭＳ尝试探讨了ＡｌＮ表面热氧化问题。结果表明,ＡｌＮ和莫来石陶瓷表面不同程度地存在Ｌｉ,Ｃ,Ｆ,Ｎａ,Ｋ,Ｃｌ,Ｔｉ,Ｒｂ等杂质元素的污染;ＡｌＮ表面存在富Ｏ层,在空气中经过８５０℃１０分钟退火后,富     

Tungsten‐ and Molybdenum‐Based Coordination Polymer‐Catalyzed N‐Oxidation of Primary Aromatic Amines with Aqueous Hydrogen Peroxide

Recyclable tungsten‐ and molybdenum‐based coordination polymers efficiently catalyzed the oxidation of primary aromatic amines to the corresponding nitroso derivatives with 30 % aqueous hydrogen peroxide in high yields at room temperature.     

Iodine(I) Reagents in Hydrochloric Acid‐Catalyzed Oxidative Iodination of Aromatic Compounds by Hydrogen Peroxide and Iodine

Hydrochloric acid activates the oxidative iodination of aromatic compounds with the iodine‐ hydrogen peroxide system through the formation of an iodine(I) compound as the iodinating reagent. Activation with hydrochloric acid is more powerful than that with sulfuric acid. The formation of dichloroiodic(I) acid (HICl₂) with various forms of hydrogen peroxide was followed using UV spectroscopy. The HICl₂ was used as the iodinating reagent. In the preparative oxidative iodinaton of various aromatic compounds, hydrochloric acid was used in a catalytic amount and the iodine(I) reagent was formed in situ with 0.5 equiv. hydrogen peroxide and 0.5 equiv. molecular iodine. Two types of reactivity were observed in oxidative iodination with iodine(I) species catalyzed by hydrochloric acid: in the iodination of anisole 1a better yields of iodination were observed with a smaller amount of hydrochloric acid, while on the contrary 4‐tert‐butyltoluene 1b gave better yields of iodination upon increasing the amount of hydrochloric acid. Reactivity was further manipulated by the choice of the solvent (MeCN, trifluoroethanol, hexafluoro‐2‐propanol).