GB/T 12496.8-1990 木制活性炭检验方法铁含量
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来源:标准资料网
基本信息
| 标准名称： | 木制活性炭检验方法铁含量 |
| 英文名称： | Test method of wooden activated carbon--Iron content |
| 中标分类： |
化工 >>
无机化工原料 >>
氧化物、单质 |
| 替代情况： | 被GB/T 12496.19-1999代替 |
| 发布日期： | 1900-01-01 |
| 实施日期： | 1900-01-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 2000-04-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 2页 |
适用范围
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前言
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目录
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引用标准
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所属分类： 化工 无机化工原料 氧化物 单质
【英文标准名称】:StandardTestMethodforDeterminationoftheUnitCellDimensionofaFaujasite-TypeZeolite
【原文标准名称】:八面沸石单位晶格尺寸的试验方法
【标准号】:ASTMD3942-2003(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:2003
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D32.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:atalyst;faujasite;unitcell;X-raydiffraction;zeolite;Faujasitecrystalzeolites;Unitcelldimension;X-raydiffractionanalysis;Zeolitecatalysts
【摘要】:ZeolitesYandX,particularlyforcatalystandadsorbentapplications,areamajorarticleofmanufactureandcommerce.Catalystsandadsorbentscomprisingthesezeolitesinvariousformsplusbinderandothercomponentshavelikewisebecomeimportant.Y-basedcatalystsareusedforfluidcatalyticcracking(FCC)andhydrocrackingofpetroleum,whileX-basedadsorbentsareusedfordesiccation,sulfurcompoundremoval,andairseparation.Theunitcelldimensionofafreshlysynthesizedfaujasite-typezeoliteisasensitivemeasureofcompositionwhich,amongotheruses,distinguishesbetweenthetwosyntheticfaujasite-typezeolites,XandY.ThepresenceofamatrixinaY-containingcatalystprecludesdeterminationofthezeoliteframeworkcompositionbydirectelementalanalysis.Usersofthetestmethodshouldbeawarethatthecorrelationbetweenframeworkcompositionandunitcelldimensionisspecifictoagivencationformofthezeolite.Steamorthermaltreatments,forexample,mayalterbothcompositionandcationform.Theusermustthereforedeterminethecorrelationthatpertainstohiszeolitecontainingsamples.Inaddition,onemayusethetestmethodsolelytodeterminetheunitcelldimension,inwhichcasenocorrelationisneeded.Othercrystallinecomponentsmaybepresentinthesamplewhosediffractionpatternmaycauseinterferencewiththeselectedfaujasite-structurediffractionpeaks.Ifthereisreasontosuspectthepresenceofsuchcomponents,thenafulldiffractometerscanshouldbeobtainedandanalyzedtoselectfaujasite-structurepeaksfreeofinterference.1.1Thistestmethodcoversthedeterminationoftheunitcelldimensionofzeoliteshavingthefaujasitecrystalstructure,includingsyntheticYandXzeolites,theirmodificationssuchasthevariouscationexchangeforms,andthedealuminized,decationated,andultrastableformsofY.Thesezeoliteshavecubicsymmetrywithaunitcellparameterusuallywithinthelimitsof24.2and25.0?/span>(2.42and2.50nm).1.2Thesamplesincludezeolitepreparationinthevariousforms,andcatalystsandadsorbentscontainingthesezeolites.Thezeolitemaybepresentinamountsaslowas5%,suchasinacrackingcatalyst.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G74
【国际标准分类号】:71_100_40
【页数】:3P.;A4
【正文语种】:英语
【英文标准名称】:VDESpecificationfortheelectricalsafetyofLaserequipmentandinstallations
【原文标准名称】:激光仪器和设备的电气安全规定
【标准号】:DINVDE0836-1977
【标准状态】:作废
【国别】:德国
【发布日期】:1977-02
【实施或试行日期】:1977-02-00
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:仪器;规范(审批);定义;性能;作标记;维修;爆炸;检修;辐射防护;安全;安全工程;警告装置;激光设备;潮气;接地导线;振动;激光器;点火电压;便携的;额定功率
【英文主题词】:
【摘要】:
【中国标准分类号】:L51
【国际标准分类号】:1250
【页数】:40P;A4
【正文语种】:德语
