1、Designation:D451222Standard Test Method forVibrated Apparent Packing Density of Fine Catalyst andCatalyst Carrier Particles and Powder1This standard is issued under the fixed designation D4512;the number immediately following the designation indicates the year oforiginal adoption or,in the case of r
2、evision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the determination of the appar-ent packing density of fine catalyst and catalys
3、t carrier powderssmaller than 0.8 mm in diameter.1.2 UnitsThe values stated in SI units are to be regardedas standard.No other units of measurement are included in thisstandard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibil
4、ity of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization est
5、ablished in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D3766 Terminology Relating to Catalysts and CatalysisE105 Guide f
6、or Probability Sampling of MaterialsE122 Practice for Calculating Sample Size to Estimate,WithSpecified Precision,the Average for a Characteristic of aLot or ProcessE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE456 Terminology Relating to Quality and StatisticsE691 Practi
7、ce for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE1272 Specification for Laboratory Glass Graduated Cylin-ders3.Terminology3.1 DefinitionsSee Terminology D3766.4.Significance and Use4.1 This test method is for measuring the apparent packingdensity of catalyst or c
8、atalyst carrier powders that are smallerthan 0.8 mm in diameter.5.Apparatus5.1 Graduated Glass or Plastic Cylinders,capacity 100 mL,feed and measuring,Class A or B per Specification E1272.5.2 Vibrator,3conventional hand-held,with hard rubber ormetal impactor.5.3 Feed Funnel,plastic,glass,or metal as
9、 shown in Fig.1.5.4 Ring Stand,vibrator holder and clamps as shown inFigs.2 and 3.5.5 Desiccator,with a desiccant grade molecular sieve suchas 4A.5.6 Balance,having sensitivity of 0.1 g.5.7 Drying Oven.6.Sample6.1 Test sample shall be obtained from larger composites byriffling or splitting in accord
10、ance with subsection 5.12 of STP447A4with the aim of obtaining a sample that represents theparticle size distribution of the larger composite.Guide E105can provide guidance on constructing a sampling plan with therepresentative sample size can be determined per PracticeE122.7.Procedure7.1 Heat an ad
11、equate amount of sample(s)at 400 6 15 Cfor not less than 3 h.Normally,this treatment can take place in1This test method is under the jurisdiction of ASTM Committee D32 onCatalysts and is the direct responsibility of Subcommittee D32.02 on Physical-Mechanical Properties.Current edition approved Aug.1
12、,2022.Published August 2022.Originallyapproved in 1985.Last previous edition approved in 2018 as D4512 03(2018)1.DOI:10.1520/D4512-22.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume informat
13、ion,refer to the standards Document Summary page onthe ASTM website.3The sole source of supply of the vibrator known to the committee at this timeis Wahl Clipper Corp.,Sterling,IL.They recommend their Model 4120 used at lowspeed to replace their Model 4180,which is discontinued.If you are aware ofal
14、ternative suppliers,please provide this information to ASTM InternationalHeadquarters.Your comments will receive careful consideration at a meeting of theresponsible technical committee,1which you may attend.4STP 447A,Manual on Test Sieving Methods,ASTM International,WestConshohocken,PA 19428.Copyri
15、ght ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International St
16、andards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1air;however,in the case of materials that might react with airat elevated temperatures(such as,prereduced catalysts)theheat treatment shall take place in an inert atmosphere.Afterheating,cool the test sample(s)in a desiccator or other suitablecontainer to eliminate the possibility of moisture adsorptionprior to testing.NOTE1These conditions may not be appropriate for all materials
