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In the thesis alkylate and bridging resorcarenes were used as CGC SP. Their chromatographic character were studied.
将烷基化和桥联的间苯二酚杯芳烃用作气相色谱固定相,考察了色谱性能,对普通化合物表现出良好的分离能力,尤其是对芳香族位置异构体有良好的分离作用。
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It was found that the MCM-22 zeolite catalyst prepared by the VPT method not only showed good crystallinity and high BET surface area, but also better crystal growth orientation and denser structure.The catalyst showed high activity, selectivity and good stability for alkylation of benzene with propylene, especially better selectivity to the end product cumene.The shaped MCM-22 zeolite catalyst prepared by the VPT method has good prospect of industrial application in synthesis of cumene.
结果表明:汽相法制备的MCM-22分子筛催化剂不仅具有较好的结晶度和较高的微孔表面积,而且具有更好的晶体生长取向性和更加致密的结构;在烷基化反应中也具有很好的活性、选择性和稳定性,特别是对目的产物异丙苯的选择性明显高于水热法合成的催化剂,在异丙苯合成上具有很好的应用前景。
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The influence of each condition on the reaction speed and yield was studied, and the optimal conditions were: the ratio of the amount of substance of aromatic amine and heptafluoro-isopropyl iodine was 1:1.1~1.5, the amount of substance of sodium dithionite, sodium bicarbonate, aniline compounds were respectively 1.1~1.3, the amount of substance of phase transfer catalyst TBAB and aniline compounds was 0.05~0.1, the concentration of aniline compound was 0.5~1.0 mol/L, reaction temperature was 10~20 ℃, and the solvent was aether.
最佳结果为:芳胺与七氟异丙基碘的物质的量比1:1.1~1.5,连二亚硫酸钠、碳酸氢钠与苯胺的物质的量分别为1.1~1.3,相转移催化剂四丁基溴化铵与苯胺的物质的量比在0.05~0.1,溶剂总用量使苯胺浓度在0.5~1.0 mol/L;反应温度10~20℃;溶剂采用乙醚。取代基供电子性越强,反应时间越短,产率越高;氨基的对位优先反应,氨基的邻位较难发生反应;且七氟异丙基总是优先取代在芳环电子云密度较高的位置上。
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When the concentration of alcohol is same with the water, there is 77.89% consumed isocyanate reacted with water. When the concentration of water is 2 times as alcohol, more than 90% isocyanate reacted with water.
当体系中醇与水的浓度相同时,反应了的异氰酸酯基中有77.89%与水反应;当体系水的浓度是醇的2 倍以上时,将有90%以上的异氰酸酯基与水反应。
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Based on GC and GC-MS analyses, the geochemical characteristics of these typical deep viscous oils are listed as follows:(1) strong preference of even n-alkanes over odd n-alkanes;(2) strong preference of phytane over pristane, i. e. Pr/Ph ratio<<1;(3) high abundance of gammacerane relative to C〓hopanes;(4) much more amounts of C〓 pentakishomohopanes than C〓 tetrakishomohopanes and even C〓 trishomohopanes.
罗家—垦西地区稠油饱和烃色谱、色谱-质谱分析结果展示:(1)正构烷烃具有明显的偶奇优势;(2)类异戊二烯烷烃具有较强的植烷优势,姥姣烷/植烷比值远小于1;(3)伽玛蜡烷相对含量(相对于C30藿烷)普遍很高;(4)C35升藿烷明显高于C34、甚至C33升藿烷;表现出膏盐湖相生物标志物的组成特征。
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The optimal carrier gas velocity of prepared SE-30 series capillary chromatographic columns was studied and used to separate isomeric compounds. The efficiency of SE-30 capillary chromatographic columns has been studied with different diameters, film thicknesses and oven temperatures, using n-do-decane, phenol, aminobenzene, and butyl acetate as test samples.
研究自制的SE-30系列毛细管气相色谱柱的载气最佳线速度,并应用于同分异构体的色谱分离分别用十二烷、苯酚、苯胺、醋酸丁酯作试祥在不同载气线速条件下对不同口径、不同膜厚、不同柱温的SE-30毛细管色谱柱的柱效进行考察,并在最佳线速度条件下分离异戊醇、硝基氯苯、硝基甲苯及二乙苯同分异构体体系。
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This thesis studies the volcanic tectono-petrofacies, petrology, mineralogy, geochemistry, isotopic chronology, stratum and high-precision SHRIMP zircon U-Pb datings of the Mt.Yandangshan volcano-intrusive complex, and concludes that: Yandangshan volcanic rock units belong to high-K calc-alkaline acid rock associations, mainly ryholitic and trachytic dacitic in composition. They have A/CNK values of 0.9-1.2 (i.e., aluminium saturation and supersaturation), enriched LREE and LILEs and depleted HFSE. Their 8Eu values are 0.11-0.32, indicating a evident fractional evolution of plagioclase crystallization. Their ∑REE varied very limitedly,(87~Sr/(86)Sri ratios and eNd values are 0.7086~0.7095 and -10.20~-9.96 for volcanic rocks, and 0.7087~0.7095 and -7.6~6.92 for the central intrusive facies syenite, which means that all the igneous rocks from Mt. Yandangshan are evolutional products of magmas with the same source, and that they derived mainly from crust, but mixed with mantle components.
本文从火山构造岩相学、岩石学、矿物学、地球化学、同位素年代学、地层学等方面出发,同时结合高精度SHRIMP锆石U-Pb定年,对雁荡山火山岩进行了系统的研究,确定雁荡山火山岩为一套以流纹质和粗面英安质为主体的高钾钙碱性酸性岩石组合,A/CNK值集中在0.9~1.2之间,为铝饱和或铝过饱和类型;富轻稀土元素和大阳离子亲石元素、相对亏损高场强元素:负铕异常明显,δEu值为0.11~0.32,表明岩浆经历了以斜长石为主的强烈结晶分异作用:岩石样品的∑REE变化有限,火山岩样品的~(87Sr/~(86)Sr_i为0.7086~0.7095,εNd为-10.20~-9.96,中央侵入体石英正长岩~(87Sr/~(86)Sr_i为0.7087~0.7095,εNd为-7.6~-6.92,表明它们是同源岩浆分异演化的产物,物质来源主要为陆壳,但有地幔物质参与。
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Borneol and isoborneol, the effective constituent in Chinese Medicine Shuxinping are quantitatively analyzed by GC and GC-MS with hexahydrothymol as an internal standard.
用气相色谱法和气相色谱-质谱联用法对舒心平的有效成分龙脑及异龙脑的提取液进行测定 [1] 。
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The result showed that the dosage of 5000 IJs/plant was the best one among the 8 dosages, the average of injured legume (3.l%) with BPS was significant lower than that of 40% isofenphos-methyl solution (9.0%) and than that of tap water (53.2%). The rate of grub decrease (95.7%) and the dry weight of peanut (5941.5 kg/ha) with BPS were significant different (P.05) to that of with 40% isofenphos-methyl solution (82.7%, 303.8 kg). The application of BPS was better with irrigation than with spray. At the dosage of 5000 IJs/plant, the combination of BPS and Rhabditis sp.(4500:500) did not show conflictive, coordinate or synergistic effect to grub control.
结果显示:在8个处理剂量中,以5000 IJs/穴的剂量田间效果最好,花生荚果受害率(3.1 %)显著低于40 %甲基异柳磷对照的(9.0 %)和清水对照的荚果受害率(53.2 %),蟒螬减退率(95.7%)和平均产量(5941.5 kg/hm^2)也与40%甲基异柳磷对照的(82.7%, 303.8 kg)有显著差异(P.05);灌施效果显著好于喷施;在5000 IJs/穴的剂量下,混合喷施BPs线虫和小杆线虫(4500:500),未表现出相克、协同或加性效应。
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In the phase-boundary reactions of cyclohexene hydration and isoamyl acetate hydrolysis, these amphiphilic zeolite particles are oriented at the aqueous-organic phase boundary and exhibit catalytic activity obviously superior to the parent zeolites.
在环己烯水合及乙酸异戊酯水解的相界面反应中,两亲性沸石分布於水-油两相界面,并表现出明显高於各自母体沸石的催化活性。
- 推荐网络例句
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But we don't care about Battlegrounds.
但我们并不在乎沙场中的显露。
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Ah! don't mention it, the butcher's shop is a horror.
啊!不用提了。提到肉,真是糟透了。
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Tristan, I have nowhere to send this letter and no reason to believe you wish to receive it.
Tristan ,我不知道把这信寄到哪里,也不知道你是否想收到它。