ASTM D6302-98(2017)
(Practice)Standard Practice for Evaluating the Kinetic Behavior of Ion Exchange Resins
Standard Practice for Evaluating the Kinetic Behavior of Ion Exchange Resins
SIGNIFICANCE AND USE
5.1 This practice is intended to evaluate changes in the performance of ion exchange resins used in mixed beds operating as polishing systems for solutions of low ionic strength, typically,
5.2 The conditions of this test must be limiting kinetically, such that kinetic leakage, and not equilibrium leakage, is tested. This leakage is influenced by a combination of influent flow velocity and concentration, as well as bed depth.
5.3 It is recommended that the practice be followed with the resin ratio, flow rate, and influent quality as indicated. The design of the apparatus permits other variations to be used that may be more appropriate to the chemicals used in a specific plant and the nature of its cooling water, but the cautions and limitations noted in the practice must be accommodated.
5.4 It is possible that the cation resin could experience kinetics problems. In many cases, however, the anion resins are more likely to experience the types of degradation or fouling that could lead to impaired kinetics. Testing of field anion and cation resins together is an option, especially when historic data on the mixed bed will be compiled. Recognize, however, that many variables can be introduced, making it difficult to interpret results or to compare to historical or new resin data on separate components.
5.5 Provision is made for calculation of the mass transfer coefficient in the Appendix X1. When such calculation is to be made, a full wet sieve analysis, as described in Test Methods D2187, also is required. Electronic particle sizing may be substituted if it is referenced back to the wet sieve method.
5.6 This practice is intended to supplement, not displace, other indicators of resin performance, such as exchange capacity, percent regeneration, and service experience records.
SCOPE
1.1 This practice is intended to evaluate changes in kinetic performance of ion exchange resins used in mixed beds to produce high purity water. Within strict limitations, it also may be used for comparing resin of different types. This standard does not seek to mimic actual operating conditions. Specific challenge solutions and conditions are specified. At the option of the user, other conditions may be tested.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 This standard does not purport to address 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.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D6302 − 98 (Reapproved 2017)
Standard Practice for
1
Evaluating the Kinetic Behavior of Ion Exchange Resins
This standard is issued under the fixed designation D6302; 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 3. Terminology
1.1 This practice is intended to evaluate changes in kinetic
3.1 Definitions:
performance of ion exchange resins used in mixed beds to
3.1.1 For definitions of terms used in this standard, refer to
producehighpuritywater.Withinstrictlimitations,italsomay
Terminology D1129.
be used for comparing resin of different types. This standard
does not seek to mimic actual operating conditions. Specific
4. Summary of Practice
challenge solutions and conditions are specified.At the option
4.1 An apparatus is described in which a specified volume
of the user, other conditions may be tested.
ofregeneratedresinsampleismixedwithacorrespondingnew
1.2 The values stated in SI units are to be regarded as
resin.The mixed bed then is operated at a controlled high flow
standard. No other units of measurement are included in this
rateonaninfluentofknowncomposition,andthequalityofthe
standard.
effluent is measured by conductivity, and if agreed upon, other
1.3 This standard does not purport to address the safety
appropriate analytical procedures.
concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and
5. Significance and Use
health practices and determine the applicability of regulatory
5.1 This practice is intended to evaluate changes in the
limitations prior to use.
performance of ion exchange resins used in mixed beds
1.4 This international standard was developed in accor-
operating as polishing systems for solutions of low ionic
dance with internationally recognized principles on standard-
strength,typically,<10mg/Ldissolvedsolids,thatareintended
ization established in the Decision on Principles for the
to produce very high purity effluents. It is recommended that
Development of International Standards, Guides and Recom-
when new resins are installed in a plant it be used to provide a
mendations issued by the World Trade Organization Technical
baselineagainstwhichthefutureperformanceofthatresincan
Barriers to Trade (TBT) Committee.
be judged.
2. Referenced Documents
5.2 The conditions of this test must be limiting kinetically,
2
2.1 ASTM Standards: such that kinetic leakage, and not equilibrium leakage, is
D1129Terminology Relating to Water
tested. This leakage is influenced by a combination of influent
D1193Specification for Reagent Water flow velocity and concentration, as well as bed depth.
D2187Test Methods for Physical and Chemical Properties
5.3 Itisrecommendedthatthepracticebefollowedwiththe
of Particulate Ion-Exchange Resins
resin ratio, flow rate, and influent quality as indicated. The
D2687PracticesforSamplingParticulateIon-ExchangeMa-
design of the apparatus permits other variations to be used that
terials
may be more appropriate to the chemicals used in a specific
D5391Test Method for Electrical Conductivity and Resis-
plant and the nature of its cooling water, but the cautions and
tivity of a Flowing High Purity Water Sample
limitations noted in the practice must be accommodated.
5.4 It is possible that the cation resin could experience
1
This practice is under the jurisdiction ofASTM Committee D19 on Water and
kineticsproblems.Inmanycases,however,theanionresinsare
is the direct responsibility of Subcommittee D19.08 on Membranes and Ion
more likely to experience the types of degradation or fouling
Exchange Materials.
that could lead to impaired kinetics. Testing of field anion and
Current edition approved June 1, 2017. Published June 2017. Originally
cation resins together is an option, especially when historic
approved in 1998. Last previous edition approved in 2009 as D6302–98 (2009).
DOI: 10.1520/D6302-98R17.
data on the mixed bed will be compiled. Recognize, however,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
that many variables can be introduced, making it difficult to
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
interpretresultsortocomparetohistoricalornewresindataon
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. separate components.
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