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當前位置:培安有限公司>>技術(shù)文章展示
2012
08-29對微波合成的認識——微波輔助的有機合成(MAOS) 歷史簡介
合成化學(xué)現(xiàn)在已經(jīng)很少使用明火了,但是直到1855年,RobertBunsen發(fā)明了煤氣本生燈,才使這種明火熱源的能量可以集中作用于反應(yīng)容器。后來本生燈被恒溫槽、油浴或者電熱板等加熱化學(xué)反應(yīng)的方法所取代。在過去的幾年里,通過微波能量來加熱和驅(qū)動化學(xué)反應(yīng)(微波合成)已成為科學(xué)界越來越流行的主題。在20世紀40年代,微波能量zui早由PercySpencer用來加熱食品,從50年代開始,微波在化學(xué)及相關(guān)工業(yè)領(lǐng)域已經(jīng)有了多種多樣的技術(shù)應(yīng)用,尤其在食品處理、干燥和高分子工業(yè)上。其他的應(yīng)用范圍則從分析化學(xué)(2012
08-292012
08-292012
08-24利用中試級的H-Cube Midi 連續(xù)流動氫化儀放大氫化反應(yīng)
Thedifficultiesinvolvedinscalingupreactionsfromlaboratorytoprocessscalearewellknown,especiallywhendangerousmaterialsareinvolved.ThispaperwilldemonstratethecapabilityoftheH-CubeMidi™tosuccessfullyscale-uphydrogenationreactions.Reactionpathwaysareusual2012
08-24利用連續(xù)流動氫化儀H-Cube Pro 將D-Glucose 還原為 D-Sorbitol
ThisapplicationnotewilldemonstratetheH-CubePro™’sincreasedproductivityinthehydrogenationofD-glucosetoD-sorbitol,whichisbelievedtobeakeyintermediateinbiofuelproduction.Hydrogenisgeneratedinsituthroughelectrolysisofwater.Boththeuseofelevatedtemperature2012
08-24利用H-Cube 連續(xù)流動氫化儀實現(xiàn)氫化反應(yīng)的自動化
Thepharmaceuticalindustryiscontinuallysearchingtoautomatetechniquesforrapidoptimizationorlibraryproduction.Theautomationofhydrogenationisoneofthoseprocessesthatisdrawinghighinterestduetoitsfrequencyindrugsynthesis.OfficialThalesNanowebsite:www.thales2012
08-24利用H-Cube 連續(xù)流動氫化儀快速進行氫化反應(yīng)
ThehydrogenationofaseriesoffunctionalgroupshasbeenperformedusingH-Cube®,anovelcontinuous-flowmicrofluidichydrogenationreactor.TheseexperimentsdemonstratethattheH-Cube®canperformadiverserangeofheterogeneoushydrogenationreactionswithhighyieldsandconver2012
08-24利用H-Cube 連續(xù)流動氫化儀及納米級鉑催化劑選擇性還原肉桂醛
INTRODUCTIONSelectivecatalytichydrogenationofa-b-unsaturatedaldehydesisanimportantstepintheindustrialpreparationoffinechemicalsandattractsmuchinterestforfundamentalresearchincatalysis1.Cinnamylalcoholplaysanimportantroleintheperfumeandflavouringindus2012
08-24更高反應(yīng)通量的H-CubePro 連續(xù)流動氫化儀
TheH-CubePro™improvesupontheoriginalH-Cube®byofferinggreaterhydrogenproduction(upto60mL/min)forhigherthroughput,widertemperaturerange(from10-150°C)including-forthefirsttime-activecoolingformoreselectivereactions.Importantly,reactantscanbehydrogenated2012
08-24X-Cube 流動化學(xué)反應(yīng)器在碳碳耦合反應(yīng)方面的應(yīng)用
TheX-Cube™isacontinuousflowreactor,capableofperformingchemicalreactionunderinertconditions,temperaturesupto200°Candpressuresupto150bar.Thispapershowsthatcarbon-carbonformingreactionsarefarmoreefficientontheX-Cube™incomparisontobatchmode.OfficialThale2012
08-24H-Cube 流動氫化儀在金屬離子清除方面的應(yīng)用
Metalcontaminationisamajorprolemforthepharmaceuticalandfinechemicalindustries.Alargeamountoftimeandresourceisspentpurifyingcompoundsaftercatalyticsteps,sothatthematalcancentrationinwithintheacceptablelimit.Generally,theacceptablelimitis0.05-10ppm,for2012
07-20CEM 微波形態(tài)萃取儀常規(guī)優(yōu)勢和技術(shù)參數(shù)
EXPLORERTM微波形態(tài)萃取儀—快速、低溶劑消耗、低溫、高回收率CEM微波萃取的常規(guī)優(yōu)勢1)微波萃取快速、安全、低溶劑消耗、無污染,高回收率,USEPA委托加州EPA對CEM的儀器進行*評估后,批準其作為EPA3546方法*的標準儀器。得到USEPA、FDA、AOAC、CAS、ASTM認可。2)不受含水量干擾EPA3545指出樣品含水量將會嚴重影響ASE萃取回收率,因此要求進行嚴格的干燥前處理。通常采用硫酸鈉或冷凍方法,易導(dǎo)致半揮發(fā)及揮發(fā)性分析物損失。而微波萃取回收率不受水含量影響,EPA對2012
07-202012
07-182012
07-122012
07-092012
07-092012
07-062012
07-06粉末狀食品在低水分含量狀態(tài)下的結(jié)構(gòu)轉(zhuǎn)變
ABSTRACTCakingoffree-flowingpowdersduringstorageisadeleteriousphenomenonubiquitousinthefeed,fertilizer,detergentandpharmaceuticalindustries,andofeconomicalimportancetolowmoisturefoods.Amongothersubjectsrelatedtocakingphenomena,thefollowingaspectsarer2012
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