ASTM D3235-02
(Test Method)Standard Test Method for Solvent Extractables in Petroleum Waxes
Standard Test Method for Solvent Extractables in Petroleum Waxes
SCOPE
1.1 This test method covers the determination of solvent extractables in petroleum waxes.
1.2 The values stated in acceptable metric units are to be regarded as the standard. The values in parentheses are for information only.
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:D3235–02
Standard Test Method for
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Solvent Extractables in Petroleum Waxes
This standard is issued under the fixed designation D3235; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope pore diameter as determined by the method in Appendix X1,
provided with an air pressure inlet tube and delivery nozzle. It
1.1 This test method covers the determination of solvent
isprovidedwithaground-glassjointtofita25by170-mmtest
extractables in petroleum waxes.
tube. The dimensions for a suitable filtration assembly are
1.2 The values stated in acceptable metric units are to be
shown in Fig. 1.
regarded as the standard. The values in parentheses are for
information only.
NOTE 1—A metallic filter stick may be employed if desired. A filter
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1.3 This standard does not purport to address all of the stick made of stainless steel and having a 12.7-mm (0.50-in.) disk of 10
to 15 nm maximum pore diameter, as determined by Test Method E128,
safety concerns, if any, associated with its use. It is the
has been found to be satisfactory. The metallic apparatus is inserted into
responsibility of the user of this standard to establish appro-
a 25 by 150-mm test tube and held in place by means of a cork.
priate safety and health practices and determine the applica-
5.2 Cooling Bath, consisting of an insulated box with
bility of regulatory limitations prior to use.
25.4-mm (1.00-in.) holes in the center to accommodate any
2. Referenced Documents
desired number of test tubes. The bath may be filled with a
2.1 ASTM Standards: suitable medium such as kerosene, and may be cooled by
2
E1 Specification for ASTM Thermometers circulatingarefrigerantthroughcoils,orbyusingsolidcarbon
E128 Test Method for Maximum Pore Diameter and Per- dioxide. A suitable cooling bath to accommodate three test
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meability of Rigid Porous Filters for Laboratory Use tubes is shown in Fig. 2.
5.3 Dropper Pipet, dispensing device capable of delivering
3. Summary of Test Method
0.5 6 0.05 g of molten wax.
3.1 The sample is dissolved in a mixture consisting of 50
5.4 Transfer Pipet, or equivalent volume dispensing device,
volume% methyl ethyl ketone and 50 volume% toluene. The capable of delivering 15 6 0.06 mL.
solution is cooled to −32°C (−25°F) to precipitate the wax,
5.5 Air Pressure Regulator, designed to supply air to the
thenfiltered.Thesolventextractablescontentisdeterminedby filtration assembly (8.5) at sufficient pressure to give an even
evaporating the solvent from the filtrate and weighing the flow of filtrate. Either a conventional pressure-reducing valve
residue.
or a mercury bubbler-type regulator has been found satisfac-
tory.The latter type, illustrated in Fig. 3, consists of a 250-mL
4. Significance and Use
glass cylinder and a T-tube held in the cylinder by means of a
4.1 The solvent extractables in a wax may have significant
rubber stopper grooved at the sides to permit the escape of
effects on several of its properties such as strength, hardness,
excess air. The volume and pressure of the air supplied to the
flexibility,scuffresistance,coefficientoffriction,coefficientof
filtrationassemblyisregulatedbythedepthtowhichtheT-tube
expansion,meltingpoint,andstainingcharacteristics.Whether
is immersed in mercury at the bottom of the cylinder. Absor-
these effects are desirable or undesirable depends on the
bentcottonplacedinthespaceabovethemercurypreventsthe
intended use of the wax.
loss of mercury by spattering. The air pressure regulator is
connected to the filter stick and assembly by means of rubber
5. Apparatus
tubing.
5.1 Filter Stick and Assembly, consisting of a 10-mm
5.6 Thermometers,two,havingarangeasshownbelowand
diameter sintered glass filter stick of 10 to 15 µm maximum
conforming to the requirements as prescribed in Specification
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This test method is under the jurisdiction of ASTM Committee D02 on The sole source of supply of a suitable metal filter stick with designated
PetroleumProductsandLubricantsandisthedirectresponsibilityofSubcommittee porosity G known to the committee at this time is the Pall Trinity Micro Corp.,
D02.10 on Properties of Petroleum Wax. Route281,Cortland,NY13045.AlistofUnitedKingdomsupplierscanbeobtained
Current edition approved Aug. 10, 2002. Published October 2002. Originally from the Institute of Petroleum, 61 New Cavendish St., London,W1G7AR, United
published as D3235–73. Last previous edition D3235–97. 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
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