聚乳酸日本合成专利分析Word下载.docx
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聚乳酸日本合成专利分析Word下载.docx
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C08G63/78
C08G63/06
(21)Applicationnumber:
10-065294
(71)Applicant:
JAPANSTEELWORKSLTD:
THE
(22)Dateoffiling:
16.03.1998
(72)Inventor:
HASHIMOTONORIAKI
SUMIHIROYUKIHIRO
KOYANAGIKUNIHIKO
FUKUSHIMATAKESHI
MASUOKAHIROKATSU
(54)PREPARATIONPROCESSANDPREPARATIONDEVICEOFPOLYLACTICACID
(57)Abstract:
PROBLEMTOBESOLVED:
Toefficientlyandinexpensivelyprepareinashorttimeahigh-molecularweightpolylacticacidbyincreasingthepolycondensationreactionrateandshiftingthereactionequilibriumtowardsthechain-linkingreaction.
SOLUTION:
Intheintermediateand/orfinalstageofapolycondensationreactionforpreparingapolylacticacidfromalacticacidmonomer,polycondensationreactioniscarriedoutwhilecarryingoutacycleprocesswhereinwater,alactideandasolventgeneratedinareactiontank1arepassedthroughareflexpipe2andadesiccant-filledcolumn8usingacarriergasinactiveagainstthesetoremoveonlythewaterandwhereintherestarereturnedtothereactiontank1.
*NOTICES*
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CLAIMS
[Claim(s)]
[Claim1]Inmiddleofapolycondensationreactionand/oraculminationwhichmanufacturepolylacticacidfromalacticacidmonomer,Amanufacturingmethodofpolylacticacidcharacterizedbyperformingapolycondensationreaction,performingcirculationwhichpassesarefluxingpipeandadrierpackedcolumnandreturnsagainwater,lactide,andasolventbywhichitisgeneratedfromareactionvesseltoareactionvesselbycarriergas[inertness/these].
[Claim2]Amanufacturingmethodofthepolylacticacidaccordingtoclaim1notusingasolvent.
[Claim3]Amanufacturingmethodofthepolylacticacidaccordingtoclaim1or2performingapolycondensationreactionbyapplicationofpressureoradepressurizingsystem.
[Claim4]Amanufacturinginstallationofpolylacticacidcharacterizedbycomprisingthefollowing.
Areactionvessel.
Acylinderwhichsuppliescarriergastothis.
Acirculatorysystemdevicewhichpassesthroughapumpandadrierpackedcolumnfromareactionvessel,andreturnstoareactionvesselagain.
[Translationdone.]
11-279267
12.10.1999
10-083578
30.03.1998
(54)PRODUCTIONOFPOLYLACTICACID
Toindustriallyadvantageouslyobtainapolylacticacidhavingahighmolecularweight,capableofresolvingproblemssuchasalimitofstirringviscosity,polymerattachmenttoastirringwingandaloweringofmolecularweightbyre-heatingafterasolidstatepolymerization,bystirringtheinsideofareactiontankwithatwin-screwtypestirrer,inameltpolymerizationofalacticacidmonomerandasolidstatepolymerizationoftheobtainedpolylacticacid.
Thisproductionofpolylacticacidisconductedbychargingalacticacidmonomerinareactiontank,refluxingwater,alactide,apolylacticacidoligomerandoccasionallyasolventgeneratedfromthereactiontankandperformingameltpolymerizationwhileremovingwatertooutsideofthereactionsystem,thensubjectingtheresultantpolylacticacidtoasolidpolymerizationatatemperaturelowerthanitsmeltingpoint.Atthistime,thestirringinthereactiontankisperformedbyusingatwinscrew-typestirrer.Preferably,thestirrerisprovidedinastatethatthetwoscrewsareengagedwitheachother.Furthermore,theoneinwhichboththetwoscrewsareindipendentlyrotatableispreferable.Otherwise,thescrewispreferablyare-integratablesegmenttype.
[Claim1]Waterbywhichteachesalacticacidmonomertoareactionvesselanditisgeneratedfromthisreactionvessel,lactide,Inamanufacturingmethodofpolylacticacidwhichcarriesoutsolidstatepolymerizationofthepolylacticacidwhichflowedbackasolventbylowmolecularweightcompoundoflacticacid,andacase,performedmeltpolymerization,removingwateroutofthesystemofreaction,andwassubsequentlyobtainedattemperaturebelowthemeltingpoint,Amanufacturingmethodofpolylacticacidperformingstirringinthisreactionvesselusing2axisscrew-typeagitatingequipment.
[Claim2]Themanufacturingmethodaccordingtoclaim1allocatedinthestatewheretwoscrewsof2axisscrew-typeagitatingequipmentgearmutually.
[Claim3]Themanufacturingmethodaccordingtoclaim1whichiswhattwoscrewsof2axisscrew-typeagitatingequipmentrotateindependently,respectively.
Areactionvesselwhichhas2axisscrew-typeagitatingequipmentinside.
Aflowing-backdevicebesidesconnectedtoapart.
Avacuumpumplinkedtothisflowing-backdevice.
Avacuumpumpseparatelyconnectedtoareactionvessel.
2000-204144
25.07.2000
11-008703
18.01.1999
SAKAITADAKI
(54)METHODANDAPPARATUSFORPRODUCINGPOLYLACTICACID
Toprovideamethodandanapparatusforproducingapolylacticacidbywhichthefillingwithandthedisappearingofaliquidinagas-liquidcounter-currentcontactinglayerinarefluxingapparatusforreturningalactidetoareactiontankcanbeeffectivelyavoided,andtheproductionofthehigh-molecularweightpolylacticacidcanbestablyperformed.
Agaseouslactidegeneratedasaby-productinareactiontank1isdischargedtoarefluxingapparatus6withby-producedwater.Thelactidecondensedinthegas-liquidcounter-currentcontactinglayerintherefluxingapparatus6isreturnedtothevaporphase11ofthereactiontank1.Theheightoftheliquidinthegas-liquidcounter-currentcontactinglayerisdetectedbythetemperaturedetectedbyatemperature-detectingelement15.Theheightoftheliquidinthegas-liquidcounter-currentcontactlayerismaintainedtoaprescribedlevelbyadjustingaflowrate-adjustingmeans14suchasaballvalve.
[Claim1]Howtocarryoutapolycondensationreactionandtomanufacturepolylacticacidfillingupareactionvesselcharacterizedbycomprisingthefollowingwithlacticacid,andremovingbyproductionwaterunderdecompression
Aprocessofflowingbacklactidewhichcarriesoutabyproductionwithsaidbyproductionwatertosaidreactionvesselwithaflowing-backdevice.
Aprocessofdetectingheightofavapor-liquidcountercurrentcontactlayerinsaidflowing-backdevice,andadjustingtherateofflowoflactideoftheshapeofagasinsaidflowing-backdevicebasedonthedetectionresult.
[Claim2]Amanufacturinginstallationofpolylacticacidwhichcarriesoutapolycondensationreactionandmanufacturespolylacticacidfillingupareactionvesselcharacterizedbycomprisingthefollowingwithlacticacid,andremovingbyproductionwaterunderdecompression.
Aflowing-backdeviceforcondensinglactidewhichcarriesoutabyproductionandflowingbacktosaidreactionvesselwithsaidbyproductionwater.
Adetectionmeansfortemperaturetodetectheightofavapor-liquidcountercurrentcontactlayerinsaidflowing-backdevice.
Therate-of-flowregulationmeansforadjustingtherateofflowoflactideoftheshapeofagasinsaidflowing-backdevicebasedonanoutputofsaiddetectionmeans.
[Claim3]Amanufacturinginstallationofthepolylacticacidaccordingtoclaim2,whereintherate-of-flowregulationmeansistheballvalveallocatedbyinletpartofaflowing-backdevice.
2001-031746
06.02.2001
11-207442
22.07.1999
Toprovideamethodforproducingapolylacticacidhavingahighmolecularweightinahighyield.
Themethodforproducingapolylacticacidbyapolycondensationreactionoflacticacidinareactionvesselequippedwitharefluxsystem6ischaracterizedinthatwatergeneratedbythecondensationreactionisdissipatedandlactideisreturnedtothereactionvessel1byadjustingflowvelocityadjustingmeans11disposedbetweenarefluxsystem6andareactionvessel1andbykeepingheightofagas-liquidcounterflowcontactphaseintherefluxsystemduringcondensation.
[Claim1]Inamethodofcarryingoutthepolycondensationofthelacticacidinareactionvesseltowhichaflowing-backdevicewasatt
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