ASTM D4164-99

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Designation: D 4164 – 99
Standard Test Method for
Mechanically Tapped Packing Density of Formed Catalyst
and Catalyst Carriers
This standard is issued under the fixed designation D 4164; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 5.3 Tapping Device, consisting of a base-plate with worm
drive, reduction ratio 15:1, cam shaft speed of 250 r/min,
1.1 This test method covers the determination of the me-
tapping stroke travel ⁄8 in. (3.2 mm).
chanically tapped density of formed catalyst and catalyst
5.4 Four Digit Adjustable Counter, which can be preset to
carriers. For the purpose of this test method, catalyst particles
deliver any number of taps between 1 and 9999.
are defined as extrudates, spheres, or formed pellets of 0.8 to
1 3 5.5 Desiccator, with a desiccant grade molecular sieve such
4.8-mm ( ⁄32 to ⁄16-in.) nominal diameter.
as No. 4A.
1.2 This standard does not purport to address all of the
5.6 Balance having a sensitivity of 0.1 g.
safety concerns, if any, associated with its use. It is the
5.7 Drying Oven.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
6. Procedure
bility of regulatory limitations prior to use.
6.1 Heat an adequate sample(s) at 673 K (400°C ) 6 15 K
2. Referenced Documents or not less than 3 h. Normally, this treatment can take place in
air. However, in the case of materials that might react with air
2.1 ASTM Standards:
at elevated temperatures (such as prereduced catalysts) the heat
E 177 Practice for Use of the Terms Precision and Bias in
treatment should take place in an inert atmosphere. After
ASTM Test Methods
2 heating, cool the test sample(s) in a desiccator or other suitable
E 456 Terminology Relating to Quality and Statistics
container to eliminate the possibility of moisture adsorption
E 691 Practice for Conducting an Interlaboratory Study to
prior to testing.
Determine the Precision of a Test Method
NOTE 1—These conditions may not be appropriate for all materials.
3. Summary of Test Method
NOTE 2—Since many catalyst formulations are strong adsorbents, the
3.1 A preconditioned sample of formed catalyst or catalyst use of No. 4A indicating (cobalt-treated) molecular sieves as a desiccating
medium is suggested. The desiccant should be regenerated at 493 K
carrier is tapped in a graduated cylinder. The mechanically
(220°C ) to 533 K (260°C), as required.
tapped packing density is determined from the known weight
and tapped volume. 6.2 Pour between 240 and 250 mL of the test specimen
carefully into the tared graduated cylinder using a funnel. To
4. Significance and Use
ensure proper level, rotate the funnel while pouring the test
4.1 This test method is to be used for measuring the
specimen. Weigh immediately to the nearest 0.1 g.
mechanically tapped packing density of formed particles that 6.3 Preset the counter to 1000 taps.
will not break up during sampling, filling, or tapping of the
6.4 Start the tapping device.
measuring cylinder under test conditions. 6.5 When tapping is completed, read the tapped volume, V,
to the nearest 1 mL by estimating the average level of the
5. Apparatus
catalyst surface in the cylinder.
5.1 Graduated
...