ASTM D721-02a
(Test Method)Standard Test Method for Oil Content of Petroleum Waxes
Standard Test Method for Oil Content of Petroleum Waxes
SCOPE
1.1 This test method covers the determination of oil in petroleum waxes having a congealing point of 30°C (86°F) or higher as determined in accordance with Test Method D 938, and containing not more than 15 % of oil.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values in parentheses are for information only.
Note 1—With some types of waxes, of oil contents greater than 5%, there may be an incompatibility with MEK resulting in the formation of two liquid phases. If this occurs, the method is not applicable to the material under test.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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An American National Standard
Designation:D721–02a
Designation: 158/69(85)
Standard Test Method for
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Oil Content of Petroleum Waxes
This standard is issued under the fixed designation D 721; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* 3. Summary of Test Method
1.1 This test method covers the determination of oil in 3.1 The sample is dissolved in methyl ethyl ketone, the
petroleum waxes having a congealing point of 30°C (86°F) or solution cooled to –32°C (–25°F) to precipitate the wax, and
higher as determined in accordance with Test Method D 938, filtered. The oil content of the filtrate is determined by
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and containing not more than 15 % of oil. evaporating the methyl ethyl ketone and weighing the residue.
1.2 The values stated in inch-pound units are to be regarded
4. Significance and Use
as the standard. The values in parentheses are for information
only. 4.1 The oil content of a wax may have significant effects on
several of its properties, such as strength, hardness, flexibility,
NOTE 1—With some types of waxes, of oil contents greater than 5%,
scuffresistance,coefficientoffriction,coefficientofexpansion,
there may be an incompatibility with MEK resulting in the formation of
meltingpoint,andoilstraining.Theimportanceoftheseeffects
two liquid phases. If this occurs, the method is not applicable to the
may be dependent upon the ultimate use of the wax.
material under test.
1.3 This standard does not purport to address all of the
5. Apparatus
safety concerns, if any, associated with its use. It is the
5.1 Filter Stick and Assembly, consisting of a 10-mm
responsibility of the user of this standard to establish appro-
diameter sintered glass filter stick of 10 to 15 µm maximum
priate safety and health practices and determine the applica-
pore diameter as determined by the method in Appendix X1,
bility of regulatory limitations prior to use.
provided with an air pressure inlet tube and delivery nozzle. It
is provided with a ground-glass joint to fit a 25 by 170-mm test
2. Referenced Documents
tube. The dimensions for a suitable filtration assembly are
2.1 ASTM Standards:
shown in Fig. 1.
D 938 Test Method for Congealing Point of Petroleum
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Waxes, Including Petrolatum
NOTE 2—A metallic filter stick may be employed if desired. A filter
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stick made of stainless steel and having a 12.7–mm ( ⁄2-in.) disk of 10 to
E 1 Specification for ASTM Thermometers
15-µm maximum pore diameter, as determined byTest Method E 128, has
E 128 Test Method for Maximum Pore Diameter and Per-
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5 been found to be satisfactory. The metallic apparatus is inserted into a 25
meability of Rigid Porous Filters for Laboratory Use
by 150–mm test tube and held in place by means of a cork.
5.2 Cooling Bath, consisting of an insulated box with 25.4
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This test method is under the jurisdiction of ASTM Committee D02 on
mm (1-in.) holes in the center to accommodate any desired
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
number of test tubes. The bath may be filled with a suitable
D02.10 on Properties of Petroleum Wax.
medium such as kerosine, and may be cooled by circulating a
Current edition approved Nov. 10, 2002. Published February 2003. Originally
approved in 1943. Last previous edition approved in 2002 as D 721-02.
In the IP, this method is under the jurisdiction of the Standardization Committee.
This test method was issued as a joint ASTM-IP tentative in 1964.
This test method was prepared jointly by the Technical Association of Pulp and
Paper Industry and ASTM International.
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This test method has been adopted for use by government agencies to replace The sole source of supply of a suitable metal filter stick with designated
Method 5431 of Federal Test Method Standard No. 79lb. porosity G known to the committee at this time is the Pall Trinity Micro Corp.,
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This test method is being used by some laboratories for products of higher oil Route281,Cortland,NY13045.AlistofUnitedKingdomsupplierscanbeobtained
content. from the Institute of Petroleum, 61 New Cavendish St., London, W1G 7AR, United
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Annual Book of ASTM Standards, Vol 05.01. Kingdom. If you are aware of alternative suppliers, please provide this information
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Annual Book of ASTM Standards, Vol 14.03. to ASTM International Headquarters. Your comments will receive careful consid-
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Annual Book of ASTM Standards, Vol 14.02. erationatameetingoftheresponsibletechnicalcommittee ,whichyoumayattend.
*A Summary of Changes section appears at the end of this
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