ASTM D5551-95(2012)

Standard Test Method for Determination of the Cloud Point of Oil

SIGNIFICANCE AND USE
This test method is intended to determine the cloud point of oils used in the softening and stuffing of leather, as well as those used in the manufacture of products for such purpose. The cloud point of oils is measured for the purpose of quality assurance.
SCOPE
1.1 This test method covers the determination of the cloud point of oils used in the softening and stuffing of leather and in the manufacture of fat liquors and other softening and stuffing compounds. This test method was derived from Test Methods D97 and D2500.
1.2 The values stated in SI units are to be regarded as the standard. The values given 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.
Note—All dimensions in millimetres. FIG. 1 Apparatus for Cloud Point Test

General Information

• Status: Historical
• Publication Date: 31-Mar-2012
• ICS: 75.080 - Petroleum products in general
• Technical Committee: D31 - Leather
• Drafting Committee: D31.08 - Fats and Oils

Relations

• Replaces: ASTM D5551-95(2006) - Standard Test Method for Determination of the Cloud Point of Oil
• Effective Date: 01-Apr-2012
• Replaced By: ASTM D5551-95(2019) - Standard Test Method for Determination of the Cloud Point of Oil
• Effective Date: 01-Apr-2019

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D5551 − 95 (Reapproved 2012)
Standard Test Method for
Determination of the Cloud Point of Oil
This standard is issued under the fixed designation D5551; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope well as those used in the manufacture of products for such
purpose.Thecloudpointofoilsismeasuredforthepurposeof
1.1 This test method covers the determination of the cloud
quality assurance.
pointofoilsusedinthesofteningandstuffingofleatherandin
the manufacture of fat liquors and other softening and stuffing
5. Apparatus
compounds. This test method was derived from Test Methods
5.1 Test Jar, clear cylindrical glass, flat bottom, 30- to
D97 and D2500.
33.5-mm inside diameter, and 115- to 125-mm height. To
1.2 The values stated in SI units are to be regarded as the
indicate sample height the jar should be marked with a line 54
standard. The values given in parentheses are for information
6 3 mm above the inside bottom.
only.
5.2 Thermometers, having ranges shown below and con-
1.3 This standard does not purport to address all of the
forming to the requirements prescribed in Specification E1 for
safety concerns, if any, associated with its use. It is the
thermometers:
responsibility of the user of this standard to establish appro-
Thermometer
priate safety and health practices and determine the applica-
Temperature Number
Thermometer Range ASTM IP
bility of regulatory limitations prior to use.
High cloud and pour −38 to +50°C 5C 1C
Low cloud and pour −80 to +20°C 6C 2C
2. Referenced Documents
Melting point +32 to +127°C 61C 63C
2.1 ASTM Standards:
5.2.1 Since separation of liquid column thermometers occa-
D97Test Method for Pour Point of Petroleum Products
sionally occurs and may escape detection, thermometers
D2500Test Method for Cloud Point of Petroleum Products
should be checked immediately prior to the test and used only
E1Specification for ASTM Liquid-in-Glass Thermometers
if they prove accurate within 6 1°C (for example, ice point).
3. Terminology
5.3 Cork, to fit the test jar, bored centrally for the test
thermometer.
3.1 cloud point—that temperature, expressed as a multiple
of 1°C (2°F), at which a cloud or haze of wax crystals appears
5.4 Jacket, metal or glass, watertight, cylindrical, flat
at the bottom of the test jar when the oil is cooled under bottom, 115 mm in depth, 42- to 50-mm inside diameter. It
prescribed conditions.
must be supported firmly in a vertical position in the cooling
bath of 5.7 so that not more than 25 mm projects out of the
4. Significance and Use
cooling medium.
4.1 This test method is intended to determine the cloud
5.5 Disk, cork or felt, 6 mm thick, to fit loosely inside the
point of oils used in the softening and stuffing of leather, as
jacket.
5.6 Gasket, to fit snugly around the outside of the test jar
ThistestmethodisunderthejurisdictionofASTMCommitteeD31onLeather
and loosely inside the jacket. The gasket may be made of
and is the direct responsibility of Subcommittee D31.08 on Fats and Oils. This test
rubber, leather, or other material that is elastic enough to cling
method was developed in cooperation with the American Leather Chemists Assn.
(Method H18-1957).
to the test jar and hard enough to hold its shape. Its purpose is
Current edition approved April 1, 2012. Published April 2012. Originally
to prevent the test jar from touching the jacket.
approved in 1994. Last previous edition approved in 2006 as D5551–95(2006).
DOI: 10.1520/D5551-95R12.
5.7 Bath or Baths, maintained at prescribed temperatures
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
with a firm support to hold the jacket vertical. The required
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
bath temperatures may be obtained by refrigeration if
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. available, otherwise by suitable freezing mixtures. Freezing
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D5551 − 95 (2012)
through dry lintless filter paper until the oil is perfectly clear,
butmakesuchfiltrationatatemperatureofatleast14°C(25°F)
above the approximate cloud point.
7.2 Pour the clear oil into the test jar to the level mark.
7.3 Close the test jar tightly by the cork carrying the test
thermometer (Note 2). Use the high cloud and pour thermom-
eteriftheexpectedcloudpointisabove−38°C(−36°F)andthe
low cloud and pour thermometer if the expected cloud point is
below−38°C (−36°F). Adjust the position of the cork and the
thermometer so that the cork fits tightly, the thermometer and
the jar are coaxial, and the thermometer bulb is resting on the
bottom of the jar.
NOTE2—Sinceseparationofthemercuryortoluenethreadofcloudand
pour thermometers occasionally occurs, and since such separation may
otherwiseescapeimmediatedetection,itissuggestedthattheicepointsof
thethermometersbecheckedimmediatelypriortothetest.Anythermom-
eter that shows as ice point differing from 0°C (32°F) by more than 1°C
(2°F) should be further examined or recalibrated, or both, before use.
7.4 Place the disk in the bottom of the jacket. Place the ring
NOTE 1—All dimensions in millimetres.
gasket around the test jar, 25 mm (1 in.) from the bottom. The
FIG. 1 Apparatus for Cloud Point Test
disk, gasket, and inside of the jacket shall be clean and dry.
Insert the test jar in the jacket.
mixtures commonly used for temperatures down to those
shown are as follows: 7.5 Maintain the temperature of the cooling bath at−1
to+2°C (30 to 35°F). Support the jacket containing the test jar
For Tempera-
tures Down
firmlyinaverticalpositioninthecoolingbathsothatnotmore
Ice and water 9°C
than 25 mm (1 in.) of the j
...