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Extractive Desulfurization from Simulated Sulfur-Rich Naphtha 预览
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作者 Shen Xizhou Li Zhiqiang +3 位作者 Fang Liuya Song Hao Gan Feng Shen Zhi 《中国炼油与石油化工:英文版》 SCIE CAS 2019年第3期61-67,共7页
Upon extractive desulfurization of sulfur-rich oil obtained after recycling raffinate,the effects of single and compound extractants,temperature,and extractant/oil ratio on desulfurization rate,oil loss rate,extractan... Upon extractive desulfurization of sulfur-rich oil obtained after recycling raffinate,the effects of single and compound extractants,temperature,and extractant/oil ratio on desulfurization rate,oil loss rate,extractant loss rate,and selectivity coefficient were investigated.The results showed that the thiophene existing in the simulated sulfur-rich oil could be further removed by extraction.The single-stage desulfurization rates achieved by dimethyl sulfoxide(DMSO)and sulfolane(SF)were 53.51%and 47.36%,respectively,while the selectivity coefficient of SF was 1.13,which was higher than that of DMSO(with a selectivity coefficient of 1.04).For the compound extractant,a single-stage desulfurization rate of 49.59%and a selectivity coefficient of 1.40 were obtained by using DMSO+10%MEA as the extractant,which was higher than that of SF.Upon using 50%SF+50%DMSO as the extractant,the single-stage desulfurization rate reached 50.92%with a selectivity coefficient of 1.32.Based on the comprehensive consideration,the DMSO+10%MEA extractant was selected as the best extractant for treating the sulfur-rich oil. 展开更多
关键词 extractive DESULFURIZATION SIMULATED sulfur-rich oil dimethyl SULFOXIDE MONOETHANOLAMINE
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立体位阻效应导致的苯酚的区域选择性溴化
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作者 马献涛 周坤洁 +2 位作者 任梦娟 王梦雨 于静 《有机化学》 SCIE CAS CSCD 北大核心 2019年第10期2796-2801,共6页
报道了苯酚与廉价易得的氢溴酸的区域选择性溴化反应.研究发现使用含有较大取代基的亚砜取代广为使用的二甲亚砜作为氧化剂,可以极大地提高反应的区域选择性,以中等至优秀的收率、高达99/1的区域选择性得到预期的溴代苯酚产物.该方法可... 报道了苯酚与廉价易得的氢溴酸的区域选择性溴化反应.研究发现使用含有较大取代基的亚砜取代广为使用的二甲亚砜作为氧化剂,可以极大地提高反应的区域选择性,以中等至优秀的收率、高达99/1的区域选择性得到预期的溴代苯酚产物.该方法可以很容易放大到50 mmol级别,并且通过萃取与重结晶分离技术即可得到预期的溴代苯酚产物. 展开更多
关键词 苯酚 区域选择性溴化 氢溴酸 亚砜 位阻效应
亚砜脱氧还原方法研究进展
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作者 李伟林 陈炫颖 +2 位作者 郑天骄 邹祺 陈文博 《有机化学》 SCIE CAS CSCD 北大核心 2019年第9期2443-2457,共15页
亚砜还原为硫醚作为有机合成中一类重要的转化,其应用一直受到人们的广泛关注.随着金属有机的发展,研究人员发展了许多条件温和、实用有效的亚砜还原方法.从还原剂的种类出发,详细介绍了近二十年里亚砜脱氧还原反应的研究进展,分析了这... 亚砜还原为硫醚作为有机合成中一类重要的转化,其应用一直受到人们的广泛关注.随着金属有机的发展,研究人员发展了许多条件温和、实用有效的亚砜还原方法.从还原剂的种类出发,详细介绍了近二十年里亚砜脱氧还原反应的研究进展,分析了这些还原体系所具有的优势及其潜在不足,并探讨了部分反应机理,最后对亚砜还原领域的发展进行了展望. 展开更多
关键词 亚砜 脱氧还原 硫醚 研究进展
Biogenic amino acid methionine-based corrosion inhibitors of mild steel in acidic media 预览
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作者 L.K.M.O.Goni M.A.Jafar Mazumder +2 位作者 S.A.Ali M.K.Nazal H.A.Al-Muallem 《矿物冶金与材料学报:英文版》 SCIE EI CAS CSCD 2019年第4期467-482,共16页
N,N-Diallyl methionine ethyl ester hydrochloride 5 underwent alternating copolymerization with SO2 via the Butler cyclopolymerization protocol in dimethyl sulfoxide(DMSO)to give water-soluble cycloterpolymer 6 with a~... N,N-Diallyl methionine ethyl ester hydrochloride 5 underwent alternating copolymerization with SO2 via the Butler cyclopolymerization protocol in dimethyl sulfoxide(DMSO)to give water-soluble cycloterpolymer 6 with a~1:1 molar ratio of sulfide and sulfoxide groups as a result of oxygen transfer from DMSO.Half of the sulfide groups in 6,upon oxidation with H2O2,afforded polymer sulfoxide 7 and polymer sulfone 8.The solution properties of these polymers were determined via a viscometric technique.The thermal stability of these polymers was determined by thermogravimetric analysis.The inhibition efficiency obtained from gravimetric mass loss,potentiodynamic polarization,and electrochemical impedance spectroscopy techniques agreed well with each other.The corrosion efficiencies increase with increasing concentration of the polymers.At a polymer concentration of 175μM,the maximum inhibition efficiency of copolymer compounds 68 was determined to be 92%,97%,and 95%,respectively.The synthesized polymer compounds acted as mixed-type inhibitors.Polymer compound 7 adsorbed onto the metal surface via chemisorption and physisorption and obeyed Langmuir,Temkin,and Freundlich adsorption isotherms.Analyses by X-ray photoelectron spectroscopy and scanning electron microscopyenergy-dispersive X-ray spectroscopy indicated that the adsorbed polymers formed a thin film on the metal surface and prevented further corrosive attack. 展开更多
关键词 CYCLOPOLYMERIZATION METHIONINE METHIONINE SULFOXIDE METHIONINE SULFONE diallylamine salt corrosion inhibition
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对气相色谱法测定水中或烃中环丁砜方法的改进 预览
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作者 蒋定建 方晓玲 +2 位作者 蒋绪忠 王伟 赵相丞 《云南化工》 CAS 2018年第9期123-124,共2页
UOP-660气相色谱法测定水中或烃中环丁砜采用的是玻璃管填充柱,但使用该柱的分离效果不好,水干扰峰影响低含量环丁砜的测定,并且使用一段时间后固定液流失严重,柱效降低,基线不稳.利用毛细管柱代替原方法中的填充柱不仅能将水峰和环丁... UOP-660气相色谱法测定水中或烃中环丁砜采用的是玻璃管填充柱,但使用该柱的分离效果不好,水干扰峰影响低含量环丁砜的测定,并且使用一段时间后固定液流失严重,柱效降低,基线不稳.利用毛细管柱代替原方法中的填充柱不仅能将水峰和环丁砜的吸收峰完全分开,而且还具有基线稳定,水干扰峰不拖尾的优点.新方法准确度高,重复性好,实用性强,完全能够满足生产需要. 展开更多
关键词 气相色谱法 环丁砜 毛细管色谱柱 填充柱
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Physicochemical properties of β-cyclodextrin solutions and precipitates prepared from injectable vehicles 预览
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作者 Saia Myo Thurein Nutdanai Lertsuphotvanit Thawatchai Phaechamud 《亚洲药物制剂科学(英文)》 2018年第5期438-449,共12页
β-Cyclodextrin( β-CyD) is cyclic oligosaccharide of a glucopyranose, containing a relatively hydrophobic central cavity and hydrophilic outer surface. However, the usefulness of β-CyD is limited owing to its low aq... β-Cyclodextrin( β-CyD) is cyclic oligosaccharide of a glucopyranose, containing a relatively hydrophobic central cavity and hydrophilic outer surface. However, the usefulness of β-CyD is limited owing to its low aqueous solubility whereas we found that its apparent high solubility was evident in some injectable solvents including 2-pyrrolidone(PYR), Nmethyl pyrrolidone(NMP) and dimethyl sulfoxide(DMSO). Therefore, in the present study, the physicochemical properties of the 30–60% w/w β-CyD in PYR, NMP and DMSO were investigated such as viscosity, water resistant, matrix formation rate and syringeability. The higher the concentration of β-CyD resulted in the increased viscosity and the higher force and energy of syringeability. β-CyD in PYR gave the highest viscosity which contributed to the lowest syringeability while β-CyD in DMSO exhibited the highest syringeability. The β-CyD in DMSO and NMP exhibited the higher rate of matrix formation. β-CyD in PYR showed the highest water resistant for phase separation while β-CyD in NMP gave the faster de-mixing rate compared to that from PYR. The difference in physicochemical properties of β-CyD dried ppts studied by scanning electron microscope(SEM), differential scanning calorimetry(DSC), X-ray diffraction(XRD), Fourier-transform infrared spectroscopy(FT-IR) and thermogravimetric analysis(TGA) revealed that there was partial complexation of β-CyD with respective solvents. Both solution and precipitate characteristic properties will be useful for using β-CyD in further investigation as matrix material dissolved in the injectable vehicles as the in situ forming gel for periodontitis treatment. 展开更多
关键词 β-CyD solution PRECIPITATES Dimethyl SULFOXIDE N-methyl PYRROLIDONE 2-PYRROLIDONE Matrix formation
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Methyl acetate-methanol mixture separation by extractive distillation:Economic aspects
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作者 Elena Graczova Branislav Sulgan +1 位作者 Samuel Barabas Pavoi Steltenpohl 《化学科学与工程前沿:英文版》 EI CAS CSCD 2018年第4期670-682,共13页
Methyl acetate is considered low toxicity volatile solvent produced either as a by-product during methanol carbonylation or via acetic acid esterification with methanol.In both cases,pure methyl acetate has to be isol... Methyl acetate is considered low toxicity volatile solvent produced either as a by-product during methanol carbonylation or via acetic acid esterification with methanol.In both cases,pure methyl acetate has to be isolated from the reaction mixture.Simulation of methyl acetate separation from its mixture with methanol by extraction distillation was carried out in ASPEN +soft-ware.In total three case studies were assumed using two different extraction solvents and two solvent regeneration strategies.In case A,novel extraction solvent 1-ethyl-3-methylimidazolium trifluoromethanesulfonate ionic liquid, was considered.Raw material separation was achieved in an extraction distillation column while the solvent regeneration was accomplished in a second distillation column in this case.In case study B,the same extraction solvent was used;however,its regeneration was carried out in a sing/e-effect evaporator.Dimethyl sulfoxide was the second extraction solvent selected.Its use in methyl acetate-methanol separation is presented in case study C. As high purity of dimethyl sulfoxide was required for the methyl acetate-methanol azeotrope breaking,its regeneration was carried out in the second distillation column only. To simulate the ternary methyl acetate--methanol-extraction solvent mixtures separation,vapor-liquid equilibrium was predicted based on the NRTL equation.Further, unknown properties of the considered ionic liquid and variation of these properties with temperature were predicted and introduced into the ASPEN +components properties database.Based on these data,optimum operation parameters of the respective separation equip- ment were established.In all case studies,the same condition had to be fulfilled,namely minimum methyl acetate content in the distillate from the extraction distillation column of 99.5mo1-%.Results of simulations using the respective optimum operation parameters were employed in the economic evaluation of the three separation unit designs studied.It was found that the least energy-demanding desi 展开更多
关键词 methyl ACETATE 1-ethyl-3-methylimidazolium TRIFLUOROMETHANESULFONATE extraction DISTILLATION DIMETHYL SULFOXIDE ECONOMIC evaluation
Liquid-Liquid Equilibrium for Extraction of Benzene from 1-Hexene Using Two Different Solvents 预览
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作者 LüYan Li Songyuan +2 位作者 Xin Kun Lin yun Lü Yan 《中国炼油与石油化工:英文版》 SCIE CAS 2018年第1期61-66,共6页
Two different solvents had been used to separate benzene from 1-hexene under atmosphere pressure by employing one of the following two solvents,viz.:dimethyl sulfoxide(DMSO)at 298.15 K and 318.15 K,and furfural at 298... Two different solvents had been used to separate benzene from 1-hexene under atmosphere pressure by employing one of the following two solvents,viz.:dimethyl sulfoxide(DMSO)at 298.15 K and 318.15 K,and furfural at 298.15 K.A series of liquid-liquid equilibrium(LLE)data had been obtained and the distribution coefficient together with the separation factor were calculated from them.Both the NRTL and the UNIQUAC models could fit in with the experimental data quite well. 展开更多
关键词 LIQUID-LIQUID EQUILIBRIA BENZENE 1-HEXENE FURFURAL dimethyl SULFOXIDE
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Structural confirmation of sulconazole sulfoxide as the primary degradation product of sulconazole nitrate 预览
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作者 Qun Xu Ashraf Khan +4 位作者 Di Gao Kristie M.Adams Fatkhulla Tadjimukhamedov Shane Tan John T.Simpson 《药物分析学报:英文版》 CAS CSCD 2018年第2期96-102,共7页
Sulconazole has been reported to degrade into sulconazole sulfoxide via sulfur oxidation;however,structural characterization data was lacking and the potential formation of an N-oxide or sulfone could not be excluded.... Sulconazole has been reported to degrade into sulconazole sulfoxide via sulfur oxidation;however,structural characterization data was lacking and the potential formation of an N-oxide or sulfone could not be excluded.To clarify the degradation pathways and incorporate the impurity profile of sulconazole into the United States Pharmacopeia–National Formulary(USP–NF)monographs,a multifaceted approach was utilized to confirm the identity of the degradant.The approach combines stress testing of sulconazole nitrate,chemical synthesis of the degradant via a hydrogen peroxide-mediated oxidation reaction,semi-preparative HPLC purification,and structural elucidation by LC–MS/MS and NMR spectroscopy.Structural determination was primarily based on the comparison of spectroscopic data of sulconazole and the oxidative degradant.The mass spectrometric data have revealed a McLafferty-type rearrangement as the characteristic fragmentation pathway for alkyl sulfoxides with aβ-hydrogen atom,and was used to distinguish the sulfoxide from N-oxide or sulfone derivatives.Moreover,the generated sulconazole sulfoxide was utilized as reference material for compendial procedure development and validation,which provides support for USP monograph modernization. 展开更多
关键词 Sulconazole NITRATE Sulconazole SULFOXIDE FORCED DEGRADATION STRUCTURAL characterization LC–MS/MS
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Amprolium exposure alters mice behavior and metabolism in vivo 预览
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作者 Juliana Oliveira Moraes Samara Dias Cardoso Rodrigues +3 位作者 Leidiano Martins Pereira Rita de Cássia Noronha Medeiros Clarissa Amorim Silva de Cordova Fabiano Mendes de Cordova 《动物模型与实验医学(英文)》 2018年第4期272-281,共10页
Background:Thiamine deficiency(TD)models have been developed,mainly using the thiamine analog pyrithiamine.Other analogs have not been used in rodents.We aimed to evaluate the effects and mechanisms of intraperitoneal... Background:Thiamine deficiency(TD)models have been developed,mainly using the thiamine analog pyrithiamine.Other analogs have not been used in rodents.We aimed to evaluate the effects and mechanisms of intraperitoneal(ip)amproliuminduced TD in mice.We also evaluated the associated pathogenesis using antioxidant and anti‐inflammatory compounds(Trolox,dimethyl sulfoxide).Methods:Male mice were separated into two groups,one receiving a standard diet(control animals),and the other a TD diet(deficient groups)for 20 days.Control mice were further subdivided into three groups receiving daily ip injections of saline(NaCl 0.9%;Cont group),Tolox(Tr group)or dimethyl sulfoxide(DMSO;Dmso group).The three TD groups received amprolium(Amp group),amprolium and Trolox(Amp+Tr group),or amprolium and DMSO(Amp+Dmso group).The animals were subjected to behavioral tests and then euthanized.The brain and viscera were analyzed.Results:Amprolium exposure induced weight loss with hyporexia,reduced the behavioral parameters(locomotion,exploratory activity,and motor coordination),and induced changes in the brain(lower cortical cell viability)and liver(steatosis).Trolox co‐treatment partially improved these conditions,but to a lesser extent than DMSO.Conclusions:Amprolium‐induced TD may be an interesting model,allowing the deficiency to develop more slowly and to a lesser extent.Amprolium exposure also seems to involve oxidative stress and inflammation,suggested as the main mechanisms of cell dysfunction in TD. 展开更多
关键词 brain DIMETHYL SULFOXIDE THIAMINE DEFICIENCY TROLOX
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G蛋白偶联受体40激动剂TAK-875亚砜类似物的合成、绝对构型确证及生物活性研究
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作者 闫玉刚 陈雪英 +2 位作者 杨新颖 徐文方 张颖杰 《有机化学》 CSCD 北大核心 2017年第4期858-865,共8页
G蛋白偶联受体40(GPR40)是治疗二型糖尿病的潜在靶点.本研究首先合成TAK-875(1)作为检测GPR40激动活性的对照药物.进一步合成化合物1的亚砜类似物11.手性制备HPLC分离化合物11得到光学纯化合物12(S,S,100.0%de)和13(R,S,100.0%de... G蛋白偶联受体40(GPR40)是治疗二型糖尿病的潜在靶点.本研究首先合成TAK-875(1)作为检测GPR40激动活性的对照药物.进一步合成化合物1的亚砜类似物11.手性制备HPLC分离化合物11得到光学纯化合物12(S,S,100.0%de)和13(R,S,100.0%de).其绝对构型通过圆二色谱确证.评价化合物1(EC_(50)=84.3 nmol·L(-1)),11(EC_(50)=77.5nmol·L(-1)),12(EC_(50)=76.1 nmol·L(-1)),13(EC_(50)=114.0 nmol·L(-1))对GPR40的激动活性,发现所合成的化合物体外保持了对照药物的活性.并通过计算机模拟对接的方法对活性保持的原因进行了解释.鉴于化合物12和13的良好活性与绝对构型的差别,下一步可分别对它们的成药性进行评价. 展开更多
关键词 手性 G蛋白偶联受体40 亚砜 圆二色谱
调和沥青的红外光谱与DSR相关性研究 预览
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作者 曹青霞 魏定邦 +1 位作者 张国宏 李晓民 《中国建材科技》 2017年第6期61-66,共6页
本文选取SK90#沥青、中海油110#沥青对老化沥青进行了调和,并对调和前后老化沥青的动态剪切流变(DSR)指标G*/sinδ(车辙因子)、δ(相位角)进行了对比试验。同时,借助红外光谱仪,对调和前后老化沥青的微观机理进行了研究。研究表... 本文选取SK90#沥青、中海油110#沥青对老化沥青进行了调和,并对调和前后老化沥青的动态剪切流变(DSR)指标G*/sinδ(车辙因子)、δ(相位角)进行了对比试验。同时,借助红外光谱仪,对调和前后老化沥青的微观机理进行了研究。研究表明:调和前后老化沥青的组分发生了变化,羰基、亚砜基比例明显减少,且调和沥青羰基、亚砜基的积分面积与G*/sinδ之间具有相关性,相关系数达到0.86以上。 展开更多
关键词 调和沥青 再生沥青 动态剪切流变 红外光谱 羰基 亚砜基
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钒掺杂的钛酸钠纳米管作为多相催化剂用于室温下硫化物的氧化 预览
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作者 Mohammad Ali Dadvar Razieh Fazaeli 《催化学报》 SCIE EI CAS CSCD 北大核心 2016年第4期494-501,共8页
合成了一种含有TiO2, Na和V的多相纳米管催化剂,采用红外光谱、X射线衍射、扫描电镜、透射电镜和N2吸附-脱附法对该催化剂的结构和织构性质进行了表征,并用于水中30%H2O2选择性氧化硫化物制备对应的亚砜。该法具有产率极高、多相体系和... 合成了一种含有TiO2, Na和V的多相纳米管催化剂,采用红外光谱、X射线衍射、扫描电镜、透射电镜和N2吸附-脱附法对该催化剂的结构和织构性质进行了表征,并用于水中30%H2O2选择性氧化硫化物制备对应的亚砜。该法具有产率极高、多相体系和简便等优点,可用于含一系列官能团底物的氧化,产物分离简便。 展开更多
关键词 硫化物 亚砜 砜类 负载型钒催化剂 纳米管
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Overview,prevention and management of chemotherapy extravasation 预览
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作者 Firas Y Kreidieh Hiba A Moukadem Nagi S El Saghir 《世界临床肿瘤学杂志》 2016年第1期87-97,共11页
Chemotherapy extravasation remains an accidental complication of chemotherapy administration and may result in serious damage to patients.We review in this article the clinical aspects of chemotherapy extravasation an... Chemotherapy extravasation remains an accidental complication of chemotherapy administration and may result in serious damage to patients.We review in this article the clinical aspects of chemotherapy extravasation and latest advances in definitions,classification,prevention,management and guidelines.We review the grading of extravasation and tissue damage according to various chemotherapeutic drugs and present an update on treatment and new antidotes including dexrazoxane for anthracyclines extravasation.We highlight the importance of education and training of the oncology team for prevention and prompt pharmacological and non-pharmacological management and stress the availability of new antidotes like dexrazoxane wherever anthracyclines are being infused. 展开更多
关键词 CHEMOTHERAPY EXTRAVASATION Vesicant Tissue damage Dimethyl SULFOXIDE DEXRAZOXANE ANTIDOTE HYALURONIDASE
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亚砜类化合物的合成及其脱硫性能研究
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作者 刘硕磊 王建英 +1 位作者 孟晓彩 史新乐 《现代化工》 CAS CSCD 北大核心 2016年第11期137-140,共4页
合成了一系列含有亚砜基团的亚砜类化合物(甲基苯基亚砜、2-氯乙基苯基亚砜、乙烯基苯基亚砜),并对合成的亚砜类化合物进行脱硫性能测定,筛选出脱硫性能好的2-氯乙基苯基亚砜。系统考察了温度与SO_2分压对2-氯乙基苯基亚砜脱硫性能的... 合成了一系列含有亚砜基团的亚砜类化合物(甲基苯基亚砜、2-氯乙基苯基亚砜、乙烯基苯基亚砜),并对合成的亚砜类化合物进行脱硫性能测定,筛选出脱硫性能好的2-氯乙基苯基亚砜。系统考察了温度与SO_2分压对2-氯乙基苯基亚砜脱硫性能的影响,并对其循环使用性能进行了测定。结果表明:在20℃时1 mol 2-氯乙基苯基亚砜可吸收SO_2达2.33 mol以上,温度升高,2-氯乙基苯基亚砜的脱硫性能下降;随着SO_2分压的增大,2-氯乙基苯基亚砜吸收SO_2的量呈现增大的趋势。2-氯乙基苯基亚砜具有良好的脱硫及再生性能,循环使用5次以上其脱硫能力不变。亚砜类化合物对SO_2的吸收为物理吸收。 展开更多
关键词 亚砜 吸收 解吸 二氧化硫
聚苯乙烯负载双亚砜及三乙烯四胺螯合树脂的合成及其对Hg2+的吸附性能研究 被引量:1
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作者 卜凡玲 纪春暖 +4 位作者 张秀娟 曲荣君 刘希光 陈厚 张雪 《离子交换与吸附》 CAS CSCD 北大核心 2015年第6期505-513,共9页
合成了聚苯乙烯负载双亚砜及三乙烯四胺新型螯合树脂[PS-(SO-TETA)2]。对所制备的新型螯合树脂进行了红外光谱和元素分析等表征,研究了树脂对Hg2+的静态饱和吸附量及树脂对Hg2+的动力学及热力学吸附性能。结果表明,pH=3时,PS-(SO-TET... 合成了聚苯乙烯负载双亚砜及三乙烯四胺新型螯合树脂[PS-(SO-TETA)2]。对所制备的新型螯合树脂进行了红外光谱和元素分析等表征,研究了树脂对Hg2+的静态饱和吸附量及树脂对Hg2+的动力学及热力学吸附性能。结果表明,pH=3时,PS-(SO-TETA)2对Hg2+的最大吸附量为0.89mmol/g。树脂对Hg2+的吸附是以液膜扩散为主的过程,拟二级动力学方程能更好地描述该吸附行为,等温吸附符合Langmuir单分子吸附模型。 展开更多
关键词 螯合树脂 亚砜 三乙烯四胺 吸附 汞离子
Brnsted酸功能化有机高铼酸盐催化氧化硫醚的研究 预览
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作者 齐书磊 徐安琪 +2 位作者 周明东 王景芸 王欣 《辽宁石油化工大学学报》 CAS 2015年第3期1-5,9共6页
采用新型 Br?nsted 酸功能化有机高铼酸盐为催化剂、质量分数为30%的 H 2 O 2为氧化剂,对含硫化合物进行了催化氧化反应的研究。通过 FT-IR、NMR、TGA 等手段对这两种催化剂的组成结构和热稳定性进行了表征与分析,考察了不同溶剂、... 采用新型 Br?nsted 酸功能化有机高铼酸盐为催化剂、质量分数为30%的 H 2 O 2为氧化剂,对含硫化合物进行了催化氧化反应的研究。通过 FT-IR、NMR、TGA 等手段对这两种催化剂的组成结构和热稳定性进行了表征与分析,考察了不同溶剂、催化剂物质的量、反应温度、氧化剂物质的量、反应时间对转化率、亚砜产率和选择性的影响。所合成的有机高铼酸盐催化氧化硫醚生成亚砜的最佳反应条件为:催化剂物质的量为0.03 mol、H 2 O 2物质的量为2.4 mmol、反应温度为40℃、反应时间为90 min。按最佳反应条件进行反应,主产物亚砜产率和选择性都可以达到95%以上。 展开更多
关键词 有机高铼酸盐 催化氧化 含硫化合物 硫醚 亚砜
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磷酸酯催化硫醚及缩硫醛氧化成亚砜反应
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作者 张俊琦 李梅秋 +2 位作者 王兴旺 张勇 贾俊 《有机化学》 SCIE CAS CSCD 北大核心 2015年第11期2405-2411,共7页
在室温条件下,以过氧化氢水溶液为氧源,非手性磷酸作为催化剂催化硫醚与缩硫醛的氧化反应,以良好到优秀的收率合成一系列亚砜化合物.该方法反应条件温和,时间短,收率高,且非对映选择性高.
关键词 硫醚 缩硫醛 氧化 亚砜 磷酸酯
船舶硫氧化物排放控制技术研究现状及展望 预览 被引量:7
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作者 杨少龙 韩志涛 +1 位作者 潘新祥 严志军 《化工进展》 CAS CSCD 北大核心 2015年第10期3779-3784,3818共7页
船舶废气中含有的大量硫氧化物对大气环境造成了严重的污染,已成为国际社会广泛关注的焦点。本文首先介绍了国际海事组织和欧美发达国家有关船舶燃油硫含量的相关规定,然后综述了近年来船舶硫氧化物排放控制技术的研究进展,对比研究了... 船舶废气中含有的大量硫氧化物对大气环境造成了严重的污染,已成为国际社会广泛关注的焦点。本文首先介绍了国际海事组织和欧美发达国家有关船舶燃油硫含量的相关规定,然后综述了近年来船舶硫氧化物排放控制技术的研究进展,对比研究了国际主流船舶废气脱硫设备厂商的产品特点。分析结果表明,湿法脱硫是目前最具应用前景的排放控制技术,并着重介绍了该技术的分类、原理及优缺点。最后指出,随着针对船舶废气中其它有害污染物的减排规定的陆续出台,以及船舶朝向绿色环保发展的总体趋势,研发经济、高效的船舶废气多污染物综合处理系统将成为未来技术发展的重要方向,其中湿法脱硫与其他技术的协同运用在实现船舶废气综合处理方面具有很大的应用潜力。 展开更多
关键词 船舶 硫氧化物 环境 污染 控制 湿法脱硫
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Synthesis and characterization of titanium complexes bearing sulfoxide groups and their catalytic behaviors in ethylene homo- and copolymerization
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作者 WANG Zheng PENG Ai-Qing +1 位作者 SUN Xiu-Li TANG Yong 《中国科学:化学英文版》 SCIE EI CAS 2014年第8期1144-1149,共6页
Titanium complexes derived from 2,4-di-tert-butyl-6-((2-(arylsulfinyl)phenylimino)methyl)phenol are designed and synthesized. X-ray diffraction studies reveal that the complexes adopt distorted octahedral geometry wit... Titanium complexes derived from 2,4-di-tert-butyl-6-((2-(arylsulfinyl)phenylimino)methyl)phenol are designed and synthesized. X-ray diffraction studies reveal that the complexes adopt distorted octahedral geometry with O(phenol), N(imine), and O(sulfoxide) coordinated with titanium. Combined with modified methylaluminoxane(MMAO), the complexes exhibit moderate to high activity to afford polyethylene even at 120 °C under 1 atm ethylene pressure. The complexes also show excellent capability in copolymerization of ethylene with either 1-hexene or norbornene. Results indicate that the introduction of sulfoxide groups could open the space around central metal and favors the insertion of bulky comonomers. 展开更多
关键词 钛络合物 共聚单体 聚乙烯 亚砜基 催化性能 复合轴承 X射线衍射分析 均聚
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