HG/T 6093-2022 PDF English
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HG
CHEMICAL INDUSTRY STANDARD
ICS 71.100
CCS J 77
Bipolar Membrane
Issued on. SEPTEMBER 30, 2022
Implemented on. APRIL 1, 2023
Issued by. Ministry of Industry and Information Technology of the People’s
Republic of China.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative References... 4
3 Terms and Definitions... 4
4 Requirements... 6
5 Test Methods... 7
6 Inspection Rules... 20
7 Marking, Packaging, Transportation and Storage... 21
Appendix A (Informative) Schematic Diagram of Testing Device... 24
1 Scope
This Document specifies the requirements, test methods, inspection rules, marking, packaging,
transportation and storage of bipolar membranes.
This Document applies to the research and development, production, inspection and use of
bipolar membrane products.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
GB/T 191 Packaging – Pictorial marking for handling of goods
GB/T 601-2016 Chemical Reagent - Preparations of Standard Volumetric Solutions
GB/T 4456 Polyethylene blown film for packaging applications
GB/T 6543 Single and double corrugated boxes for transport packages
GB/T 6682-2008 Water for analytical laboratory use - Specification and test methods
GB/T 9174 General specification for transport packages of general cargo
GB/T 9969 General Principles for Preparation of Instructions for Use of Industrial
Products
3 Terms and Definitions
For the purposes of this Document, the terms and definitions given in GB/T 20103-2006 and
HY/T 166.1-2013 and the following apply.
3.1 Bipolar membrane
A membrane with a multi-layer functional structure composed of anion and cation exchange
layers and a transition layer with water dissociation catalysis in the middle.
[Source. GB/T 20103-2006, 3.l.7, modified]
3.4 Dimensional changes
The extent to which the geometric dimensions of a membrane change when it is transferred
from one solution to another.
3.5 Area resistance
The resistance value of a film specimen of a certain area.
3.6 Trans-membrane voltage
in a given solution, the trans-membrane flow of a certain amount of charged ions results in a
potential difference on both sides of the membrane.
3.7 Tolerance of chemical reagent
After soaking in a specific concentration of chemical reagent for a certain period of time. The
extent of membrane damage.
4 Requirements
4.1 Appearance
The appearance of the bipolar membrane shall be smooth and clean, without mechanical
damage or pinholes, no wrinkles, no oil, or no debris.
4.4 Bursting strength
The bursting strength of the bipolar membrane shall be no less than 0.25 MPa.
4.5 Dimensional changes
The change rate of the length, width and thickness of the bipolar membrane when transferred
from pure water to 2 mol/L hydrochloric acid solution shall be no greater than 8%.
4.6 Area resistance
The area resistance of the bipolar membrane shall be no greater than 10 Ω·cm2.
4.7 Trans-membrane voltage
The trans-membrane voltage of the bipolar membrane at a current density of 100 mA/cm2 shall
be no greater than 1.5V.
4.9 Generation rate of acid or base
At a current density of 40 mA/cm2, the generation rate of acid or base of the bipolar membrane
shall be no less than 0.15 mol/ (m2 • min).
5 Test Methods
5.1 Appearance
The visual inspection and inspection results shall meet the requirements of 4.1.
5.3 Ion exchange capacity
5.3.1 Test conditions
The test shall be carried out in a constant temperature room at 25°C ± 1°C.
5.3.2 Test principle
The dissociable ions attracted to the fixed groups in the membrane can equivalently exchange
with counter ions in the solution. The exchange capacity of the membrane is determined by
titrating the dissociable ions exchanged with the counter ions in the solution.
5.3.4 Chemical reagents
Sodium hydroxide, hydrochloric acid, silver nitrate, sodium sulfate, potassium hydrogen
phthalate, sodium chloride, phenol hydroxide, potassium chromate, pure water.
Among them, sodium chloride and potassium hydrogen phthalate are the primary reagents, and
the rest are of analytically pure. The used standard solution is prepared in accordance with the
provisions of GB/T 601-2016; and the pure water shall comply with the secondary water
standard specified in GB/T 6682-2008.
5.3.5 Test procedures
5.3.5.3 Determination of moisture content
The determination of moisture content shall be carried out according to the test method
specified in 6.3 of HY/T 166.1-2013.
5.3.5.4 Determination of ion exchange capacity of cation exchange layer
The procedures for measuring the ion exchange capacity of the cation exchange layer are as
follows.
5.3.5.5 Determination of ion exchange capacity of anion exchange layer
The procedures for measuring the ion exchange capacity of the anion exchange layer are as
follows.
5.4 Bursting strength
The determination of the bursting strength of the bipolar membrane shall be carried out in
accordance with the test method specified in 6.6 of HY/T 166.1-2013.
5.5 Dimensional changes
5.5.1 Test conditions
The test shall be carried out in a constant temperature room at 25°C±1°C.
5.8 Tolerance of chemical reagent
5.8.1 Test conditions
The test is carried out in a constant temperature room at 25°C ± 1°C.
5.8.4 Test procedures
5.8.4.1 Acid tolerance of chemical reagent
The test procedures for acid tolerance of chemical reagents are as follows.
5.9 Generation rate of acid and base
5.9.1 Test conditions
The test shall be carried out in the constant temperature room at 25°C±1°C.
5.9.2 Test principle
Place the bipolar membrane in an electrodialysis membrane stack containing electrode plates;
introduce the sodium sulfate solution. Apply a DC electric field on both sides of the bipolar
membrane; measure the amount of acid and base produced in the acid-base chamber under fixed
current density conditions, and calculate the generation rate of acid or base.
5.9.3 Apparatus
The apparatus required for the test is as follows.
5.9.4 Chemical reagents
Sodium sulfate solution [c(Na2SO4) = 0.5 mol/L].
5.9.5 Test procedures
The test procedures for the generation rate of acid or base of the bipolar membrane are as
follows.
5.9.6 Data processing
Calculate the generation rate of acid according to the Formula (12). Calculate the generation
rate of base according to the Formula (13).
6 Inspection Rules
6.1 Inspection classification
The inspection of bipolar membranes is divided into exit-factory inspection and type inspection.
6.2 Batching rules
Products of the same model and produced on the same day are considered to be one batch.
6.3 Exit-factory inspection
6.3.2 Determination rules
If all inspection items meet the requirements of this Document, the batch of products will be
deemed qualified.
6.4 Type inspection
6.4.1 Type inspection conditions
Type inspection shall be carried out under one of the following circumstances.
6.4.3 Judgment rules
If all inspection items meet the requirements of this Document, the batch of products will be
judged to be qualified.
7 Marking, Packaging, Transportation and Storage
7.1 Marking
The exit-factory mark of the bipolar membrane shall include the following items.
7.2 Packaging
7.2.1 Inner packaging
The inner packaging of the bipolar membrane uses high-density polyethylene blown membrane,
which shall comply with the provisions of GB/T 4456.
7.2.2 Outer packaging
The outer packaging of bipolar membrane contains the following contents.
7.2.3 Packaging box
The packaging box of the bipolar membrane contains the following contents·
7.3 Transportation
During the transportation, loading and unloading process of bipolar membranes, they shall not
be subject to severe impact, bumping, throwing, squeezing, rain and stains; and shall also avoid
contact with corrosive chemical reagents.
HG/T 6093-2022
HG
CHEMICAL INDUSTRY STANDARD
ICS 71.100
CCS J 77
Bipolar Membrane
Issued on. SEPTEMBER 30, 2022
Implemented on. APRIL 1, 2023
Issued by. Ministry of Industry and Information Technology of the People’s
Republic of China.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative References... 4
3 Terms and Definitions... 4
4 Requirements... 6
5 Test Methods... 7
6 Inspection Rules... 20
7 Marking, Packaging, Transportation and Storage... 21
Appendix A (Informative) Schematic Diagram of Testing Device... 24
1 Scope
This Document specifies the requirements, test methods, inspection rules, marking, packaging,
transportation and storage of bipolar membranes.
This Document applies to the research and development, production, inspection and use of
bipolar membrane products.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
GB/T 191 Packaging – Pictorial marking for handling of goods
GB/T 601-2016 Chemical Reagent - Preparations of Standard Volumetric Solutions
GB/T 4456 Polyethylene blown film for packaging applications
GB/T 6543 Single and double corrugated boxes for transport packages
GB/T 6682-2008 Water for analytical laboratory use - Specification and test methods
GB/T 9174 General specification for transport packages of general cargo
GB/T 9969 General Principles for Preparation of Instructions for Use of Industrial
Products
3 Terms and Definitions
For the purposes of this Document, the terms and definitions given in GB/T 20103-2006 and
HY/T 166.1-2013 and the following apply.
3.1 Bipolar membrane
A membrane with a multi-layer functional structure composed of anion and cation exchange
layers and a transition layer with water dissociation catalysis in the middle.
[Source. GB/T 20103-2006, 3.l.7, modified]
3.4 Dimensional changes
The extent to which the geometric dimensions of a membrane change when it is transferred
from one solution to another.
3.5 Area resistance
The resistance value of a film specimen of a certain area.
3.6 Trans-membrane voltage
in a given solution, the trans-membrane flow of a certain amount of charged ions results in a
potential difference on both sides of the membrane.
3.7 Tolerance of chemical reagent
After soaking in a specific concentration of chemical reagent for a certain period of time. The
extent of membrane damage.
4 Requirements
4.1 Appearance
The appearance of the bipolar membrane shall be smooth and clean, without mechanical
damage or pinholes, no wrinkles, no oil, or no debris.
4.4 Bursting strength
The bursting strength of the bipolar membrane shall be no less than 0.25 MPa.
4.5 Dimensional changes
The change rate of the length, width and thickness of the bipolar membrane when transferred
from pure water to 2 mol/L hydrochloric acid solution shall be no greater than 8%.
4.6 Area resistance
The area resistance of the bipolar membrane shall be no greater than 10 Ω·cm2.
4.7 Trans-membrane voltage
The trans-membrane voltage of the bipolar membrane at a current density of 100 mA/cm2 shall
be no greater than 1.5V.
4.9 Generation rate of acid or base
At a current density of 40 mA/cm2, the generation rate of acid or base of the bipolar membrane
shall be no less than 0.15 mol/ (m2 • min).
5 Test Methods
5.1 Appearance
The visual inspection and inspection results shall meet the requirements of 4.1.
5.3 Ion exchange capacity
5.3.1 Test conditions
The test shall be carried out in a constant temperature room at 25°C ± 1°C.
5.3.2 Test principle
The dissociable ions attracted to the fixed groups in the membrane can equivalently exchange
with counter ions in the solution. The exchange capacity of the membrane is determined by
titrating the dissociable ions exchanged with the counter ions in the solution.
5.3.4 Chemical reagents
Sodium hydroxide, hydrochloric acid, silver nitrate, sodium sulfate, potassium hydrogen
phthalate, sodium chloride, phenol hydroxide, potassium chromate, pure water.
Among them, sodium chloride and potassium hydrogen phthalate are the primary reagents, and
the rest are of analytically pure. The used standard solution is prepared in accordance with the
provisions of GB/T 601-2016; and the pure water shall comply with the secondary water
standard specified in GB/T 6682-2008.
5.3.5 Test procedures
5.3.5.3 Determination of moisture content
The determination of moisture content shall be carried out according to the test method
specified in 6.3 of HY/T 166.1-2013.
5.3.5.4 Determination of ion exchange capacity of cation exchange layer
The procedures for measuring the ion exchange capacity of the cation exchange layer are as
follows.
5.3.5.5 Determination of ion exchange capacity of anion exchange layer
The procedures for measuring the ion exchange capacity of the anion exchange layer are as
follows.
5.4 Bursting strength
The determination of the bursting strength of the bipolar membrane shall be carried out in
accordance with the test method specified in 6.6 of HY/T 166.1-2013.
5.5 Dimensional changes
5.5.1 Test conditions
The test shall be carried out in a constant temperature room at 25°C±1°C.
5.8 Tolerance of chemical reagent
5.8.1 Test conditions
The test is carried out in a constant temperature room at 25°C ± 1°C.
5.8.4 Test procedures
5.8.4.1 Acid tolerance of chemical reagent
The test procedures for acid tolerance of chemical reagents are as follows.
5.9 Generation rate of acid and base
5.9.1 Test conditions
The test shall be carried out in the constant temperature room at 25°C±1°C.
5.9.2 Test principle
Place the bipolar membrane in an electrodialysis membrane stack containing electrode plates;
introduce the sodium sulfate solution. Apply a DC electric field on both sides of the bipolar
membrane; measure the amount of acid and base produced in the acid-base chamber under fixed
current density conditions, and calculate the generation rate of acid or base.
5.9.3 Apparatus
The apparatus required for the test is as follows.
5.9.4 Chemical reagents
Sodium sulfate solution [c(Na2SO4) = 0.5 mol/L].
5.9.5 Test procedures
The test procedures for the generation rate of acid or base of the bipolar membrane are as
follows.
5.9.6 Data processing
Calculate the generation rate of acid according to the Formula (12). Calculate the generation
rate of base according to the Formula (13).
6 Inspection Rules
6.1 Inspection classification
The inspection of bipolar membranes is divided into exit-factory inspection and type inspection.
6.2 Batching rules
Products of the same model and produced on the same day are considered to be one batch.
6.3 Exit-factory inspection
6.3.2 Determination rules
If all inspection items meet the requirements of this Document, the batch of products will be
deemed qualified.
6.4 Type inspection
6.4.1 Type inspection conditions
Type inspection shall be carried out under one of the following circumstances.
6.4.3 Judgment rules
If all inspection items meet the requirements of this Document, the batch of products will be
judged to be qualified.
7 Marking, Packaging, Transportation and Storage
7.1 Marking
The exit-factory mark of the bipolar membrane shall include the following items.
7.2 Packaging
7.2.1 Inner packaging
The inner packaging of the bipolar membrane uses high-density polyethylene blown membrane,
which shall comply with the provisions of GB/T 4456.
7.2.2 Outer packaging
The outer packaging of bipolar membrane contains the following contents.
7.2.3 Packaging box
The packaging box of the bipolar membrane contains the following contents·
7.3 Transportation
During the transportation, loading and unloading process of bipolar membranes, they shall not
be subject to severe impact, bumping, throwing, squeezing, rain and stains; and shall also avoid
contact with corrosive chemical reagents.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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