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ID:18582159
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页数:17页
时间:2018-09-19
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1、7.BLEACHINGBleachingSequencesPreparationofBleachChemicalsChlorination&ExtractoinOxygenBleachingHypochloriteBleachingBleachingEquipmentRecyclesofFiltratesPulpBrightening8.PREPARATIONOFSTORKFORPAPERMAKINGRepulping(Dispersion)RefiningMeteringandBlendingofFurnishes9.NON-FIBROUSADDI
2、TIVESTOPAPERMAKINGSTORKRetentiononthePaperMachineWetEndChemistryApplicationsofNon-FibrousAdditivesAlkalinePapermaking10.PAPERMANUFACTURE-WETENDOPERATIONSIntroductiontothePaperMachineApproachSystemFlowspreaderandHeadboxSheet-FormingProcessWirePart(Fourdrinier)Twin-WireFormingWhi
3、teWaterSystemBrokeSystemPressingVacuumSystem11.PAPERMANUFACTURE-DRYENDOPERATIONSPaperDryingCalenderingProfileControlReelingPaperMachineDrivesWindingRollFinishing171.翻译文章,每周一篇,平时成绩2.参考书,外文杂志(tappi,appita,ppi,ppcetc.)---图书馆3.学习方法,预习-听讲-翻译(主要是专业词汇问题)4.成绩,考试+平时翻译+提问更正:1.p122Oioxin=
4、Dioxin二噁英problem2.content7bleaching7.3chlorinationh=r3.9.2wetendchemistry4.p130倒数5linecountercurrent5.p132倒数5linemodem=modern6.p153line10ids=aids7.p153倒数3linehe=the8.p157floes=flocs9.p159倒数2arived=derived10.p164lineonean=art11.p164倒数7corrmonent=componentThewhitenessofpulpismeas
5、uredbyitsabilitytoreflectmonochromaticlightincomparisontoaknownstandard(usuallymagnesiumoxide).TheinstrumentmostcommonlyusedistheZeissElrephoreflectancemeterwhichprovidesadiffuselightsource.Fullybleachedsulfitepulpscantestashighas94,andunbleachedkraftpulpaslowas15Elrephounits.U
6、nbleachedpulpsexhibitawiderangeofbrightnessvalue(Table7-1).Thesulfiteprocessproducesrelativelybrightchemicalpulps,upto65,wherethoseproducedbythekraft,sodaandsemichemicalprocessescanbequitedark.Mechanicalpulpbrightnessismainlyafunctionofthespeciesandconditionofthewoodpulped.Gene
7、rally,onlythosespeciesprovidingbrightnessvaluesover55areutilizedformechnicalpulping.Celluloseandhemicelluloseareinherentlywhiteanddonotcontributetopulpcolor.Itisgenerallyagreedthat“chromophoricgroups”ontheligninareprincipallyresonsibleforcoloroxidativemechanismsarebelievedtocon
8、vertpartofthelignin’sphenolicgroupstoquinone-likesubst
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