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Saundane A. R. Yarlakatti Manjunatha 《化学与化工:英文版》2009,(12):54-59
As benzoxazin-4-ones and quinazolines linked to indole nucleus acting as a good pharmacophore, the synthesis of these compounds has significant meaning. The key intermediates 2-(2', 5'-disubstituted-indol-2'-yl)-4H-3, 1-benzoxazin-4-ones (3) were synthesized from cyclocondensation of indole-2-carbonyl chlorides (2) and anthranilic acid. Compound (3) on reaction with thiosemicarbazide and o-phenylene diamine afforded the compound (4) and (6) respectively. Compound (4) subjected to intramolecular cyclization under thermal conditions above its melting point afforded the compound (5). Similarly compound (3) on fusion with o- phenylene diamine gave compound (7). Structures of these compounds were confirmed by their spectral studies. The compounds were screened for their antimicrobial activity and the results were reported. 相似文献
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A series of N-substituted (Z)-3-((2-benzyl)-4-oxopent-2-yl)pyrrole-2,5-diones were synthesized and characterized. The compounds were synthesized from dimethyl-2-((Z)-2-(benzylamino)-4-oxopent-2-en-3-yl) fumarate (9) and dimethyl acetylenedi-carboxylate followed by reaction with some amines in refluxing ethanol. The identification of the compounds were based on spectroscopic analysis such as 1R (infrared), UV (ultraviolet), ^1H-NMR (nuclear magnetic resonance) and the microanalysis of the elements (CHN (microanalysis)) data. 相似文献
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以低密度聚乙烯DJM-1820为基础树脂,在Unipol全密度聚乙烯装置上,采用国产催化剂XY-S与进口催化剂Ucat-J1p25按一定配比混合的方式,连续注入反应器,通过对反应温度、乙烯分压、n(H_2)/n(C_2H_4~=)、n(1-C_4H_8~=)/n(C_2H_4~=)、n(Al)/n(Ti)等工艺指标控制... 相似文献
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《国内外石油化工快报》2008,(6):33-34
本发明涉及使用氯化氢和氧气将烯烃氧氯化为氯代烷烃的装置(1)和方法。装置(1)具有进入流化床反应器(14)的包含催化剂颗粒(13)的流化床(12)的气体入口(4,5,6)和至少一个位于流化床(12)上方的反应气体出口(11)以及用于放热的氧氯化反应的热控制的冷却布置(15)。沿着流化床(12)以垂直分布布置多个用于相同入口气体的气体入口(4,5,6)。 相似文献
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据BP数据,2008年世界一次能源总消费量达到112亿9490万吨油当量,比2007年增长1.4%。全部增量几乎来自非经合组织国家,其中中国约占3/4。一次能源(能源消费量,百万吨油当量;占世界总消费量的%)消费国的依次是;美国(22.99亿吨油当量,20.4%)、中国(20.025亿吨,17.7%)、俄罗斯(6.846亿吨,6.1%)、日本(5.075亿吨,4.5%)、印度(4.333亿吨,3.8%)。 相似文献
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采用热聚合法,以尿素为前驱体,碘化氨为掺杂剂,制备出不同碘离子掺杂量的可见光催化剂石墨相氮化碳(g C3N4)。对碘掺杂g C3N4催化剂(Ix C3N4)进行X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、傅里叶变换红外光谱(FT IR)、X光电子能谱(XPS)、紫外 可见漫反射(UV Vis)、N2吸附、电子荧光光谱(PL)、电化学阻抗(EIS)等表征,分析了催化剂的形貌、结构、光学和电学性能。以4 硝基苯酚为目标污染物进行光催化降解实验,选取最佳碘掺杂量的I002 C3N4催化剂进行重复性实验。结果表明,碘离子的引入没有改变g C3N4的原始形貌和结构,掺杂后的样品拓宽了g C3N4对可见光的吸收范围,降低了光生电子 空穴对的复合率;掺杂最佳碘离子量的催化剂I002 C3N4在2 h内对4 硝基苯酚的降解率达到84%,重复4次实验后,降解率仍能达到80%。 相似文献
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以Zn(Ac)2·2H2O,SnCl4-5H2O和NaOH为起始原料,以定量滤纸为模板,先用生物模板法制备出微纳米锡酸锌(Zn2SnO4),后用x射线衍射仪(XRD)和扫描电子显微镜(SEM)表征了产物的相组成和微观结构,还研究了主要合成工艺条件对产物结构、形貌及粒度的影响。结果表明,微纳米锡酸锌纯度较高且能很好地复制生物模板(定量滤纸)的形貌;n(Zn^2+)/n(Sn^4+)为2时可获得立方晶型且无杂质的微纳米Zn2SnO4晶体;Zn2SnO4晶体的结晶度随煅烧温度的升高而提高,最佳煅烧温度为900℃。 相似文献
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为提高BiVO4的光催化活性,通过浸渍法将BiVO4负载于SBA-15介孔分子筛上合成BiVO4/SBA-15催化剂,采用X射线衍射(XRD)、N2吸附-脱附等手段对合成催化剂结构进行表征;在400 W金卤灯照射下,以BiVO4/SBA-15为催化剂进行苯乙烯氧化反应,考察反应条件对氧化性能的影响。结果表明:BiVO4的负载未破坏SBA-15的介孔结构,且均匀分散在其表面;与BiVO4催化剂相比,BiVO4/SBA-15的光催化活性有显著提高,在反应温度为70 ℃、反应时间为2.5 h、n(苯乙烯):n(丙酮):n(过氧化氢)=1:2:3.5、m(BiVO4/SBA-15):m(苯乙烯)=10%的光催化条件下,苯乙烯转化率达到90.31%,苯甲醛选择性达到70.65%。 相似文献
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害健健 《石油化工安全技术》2011,(1):43-47,60
利用集成化的数学模型预测活性污泥系统的性能是污水处理的热点研究方向之一。国际水协会(IWA)建立了4种活性污泥模型,活性污泥1号模型(ASM1)、2号模型(ASM2)与2d模型(ASM2d)、3号模型(ASM3)。简要介绍了这4种模型,并着重介绍了活性污泥1号模型(ASM1)。同时,介绍了基于活性污泥模型的GPS—X软件。 相似文献
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用水合肼回收电沉积铬废液中铬的工艺条件研究 总被引:4,自引:0,他引:4
研究了用水合胼回收电沉积铬废液中铬的工艺条件。实验结果表明,在30℃下于25mL含铬废液中加入1.6mL H2SO4和0.8mL水合胼,8min即可使Cr(Ⅵ)还原为Cr(Ⅲ)。然后用浓氨水使Cr(Ⅲ)完全沉淀,再与H2SO4充分反应,得到Cr2(SO4)3,从而实现铬废液中铬的回收。 相似文献
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Sandip R. Sabale Baburao S. Mohite 《化学与化工:英文版》2009,(6):37-43
A simple and selective method for the separation of Be(Ⅱ) was developed using poly[dibenzo-18-crown-6] as a stationary phase in column chromatography. The study was carried out in L-arginine medium. 1.0-8.0 M HCl and CH3COOH, 0.5-8.0 M HBr, HClO4 and H2SO4, 0.2-1.0 M EDTA and 0.02-0.12 M ammonium oxalate were found to be an efficient eluents for Be(Ⅱ). The capacity of polymer was 0.554-0.01 mmol/g of crown polymer. The tolerance limit of various cations and anions were reported. Be(Ⅱ) was quantitatively separated from Mg(Ⅱ), Ca(Ⅱ), Sr(Ⅱ) and Ba(Ⅱ). The selective separation of Be(Ⅱ) was possible from multicomponent mixtures. The method was extended to determine Be(Ⅱ) from geological samples. Method was simple, rapid and selective having good reproducibility (approximately4-2%). 相似文献
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Masaki Kobayashi Takashiro Akitsu 《化学与化工:英文版》2014,(6):557-563
Composite materials composed of LiMnO2, a typical electrode material for lithium ion battery, and a chiral cyanide-bridged Ni(Ⅱ)-Fe(Ⅲ) coordination polymer [NiL2][Fe(CN)6]·4H2O (Ni-Fe, H-form) (L = (1R,2R)-(-)-1,2-cyclohexane-diamine) or its deuterium isomer, [NiL2][Fe(CN)6]·4D2O (Ni-Fe, D-form) have been prepared by the various ratios (w/w) of Ni-Fe:LiMnO2 = 10:0 (pure Ni-Fe), 9:1, 8:2, 7:3, 6:4, 5:5, 4:6, 3:7, 2:8, 1:9 and 0:10 (pure LiMnO2). Gradual shift of IR (infrared) spectra by changing the ratios and losing difference between H-form and D-form of Ni-Fe due to isotope effects revealed adsorption of Ni-Fe onto LiMnO2 to form composite materials. Formation of composite materials of Ni-Fe and LiMnO2 could be also proved losing ferromagnetic behavior of LiMnO2 on increasing of the ratios of Ni-Fe in each composite. In contrast to smoothly positive thermal expansion of pure LiMnO2 along the crystallographic b axis, variable temperature powder XRD (X-ray diffraction) patterns at 100-300 K of the composite materials exhibited thermally-accessible lattice distortion along the b axis with different ratios. It is also proved deviation of ideal linear correlation of an evaluation function, In K = a/T + b (where, K = (d(T) - d(0))/d(T), d(T) denotes nλ/(sin 2θ) at T (K)). 相似文献
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介绍了2008年国际金融危机对世界炼油工业带来的各种影响,分析了在后危机时代世界炼油工业面临的各种机遇与挑战。挑战:(1)炼油能力过剩增加;(2)国际油价走高;(3)轻重原油价差收窄;(4)汽柴油价格颠倒;(5)炼油工业要为提高汽车燃油效率,增加生物燃料用量和减排CO2付出沉重代价;(6)炼油工程建设项目投资难以大幅度减少。机遇:(1)石油基运输燃料将继续主导世界运输燃料市场,炼油厂仍将是汽油和柴油的主要来源地;(2)轻重原油价差会重新拉大;(3)升级换代炼油技术不断出现,重质劣质渣油深度转化技术取得突破性进展;(4)亚太地区将持续引领全球炼油能力的增长。 相似文献
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水热法合成纳米铁酸镍及其电化学性能的研究 总被引:2,自引:0,他引:2
分别以聚乙二醇(PEG)、十二烷基苯磺酸钠(SDBS)作表面活性剂,采用水热法合成了铁酸镍(NiFe2O4)纳米微粒。利用X射线衍射仪(XRD)、透射电子显微镜(TEM)和比表面分析仪对所得产物进行了表征,并研究了所制备NiFe2O4纳米微粒作为锂离子电池负极材料的充放电性能。结果表明,用PEG作为表面活性剂时,所制备NiFe2O4纳米微粒的平均粒径为40~50nm、比表面积为108.73m^2/g,其首次放电容量达到1240.8mA·h/g。 相似文献