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GB/T 2449.1-2021 English PDF (GBT2449.1-2021)
GB/T 2449.1-2021 English PDF (GBT2449.1-2021)
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GB/T 2449.1-2021: Sulphur for industrial use -- Part 1: Solid product
GB/T 2449.1-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 71.060.10
CCS G 13
Replacing 2449.1-2014
Sulphur for industrial use - Part 1.Solid product
ISSUED ON. DECEMBER 31, 2021
IMPLEMENTED ON. JULY 01, 2022
Issued by. State Administration for Market Regulation.
Standardization Administration of PRC.
Table of Contents
Foreword... 3
Introduction... 5
1 Scope... 7
2 Normative references... 7
3 Terms and definitions... 8
4 Technical requirements... 8
4.1 Appearance... 8
4.2 Technical indicators... 8
5 Samples... 8
5.1 Sampling method... 8
5.2 Processing of laboratory sample... 9
5.3 Preparation of specimens... 9
6 Test methods... 10
6.1 General... 10
6.2 Determination of sulfur mass fraction... 10
6.3 Determination of moisture mass fraction... 12
6.4 Determination of ash mass fraction... 14
6.5 Determination of acidity mass fraction... 15
6.6 Determination of mass fraction of organic matter... 17
6.7 Determination of arsenic mass fraction... 24
6.8 Determination of mass fraction of iron... 28
6.9 Determination of mass fraction of powdered sulfur sieve residue... 33
7 Inspection rules... 34
8 Marking, packaging, transportation, storage... 34
9 Safety... 35
Sulphur for industrial use - Part 1.Solid product
Warning. Some reagents used in this document are toxic or corrosive. Some
operations are dangerous. This document does not disclose all possible safety
issues. Users shall strictly follow the relevant provisions for correct use and are
responsible for taking appropriate safety and health measures.
1 Scope
This document specifies the technical requirements, sampling, test methods, inspection
rules, marking, packaging, transportation, storage, safety of solid sulfur for industrial
use.
This document applies to solid industrial sulfur, which is produced from petroleum
refinery gas, natural gas, coal chemical acid gas, coke oven gas, flue gas, sulfur waste
gas recovery, pyrite.
2 Normative references
The contents of the following documents constitute essential provisions of this
document through normative references in the text. Among them, for dated reference
documents, only the version corresponding to the date applies to this document; for
undated reference documents, the latest version (including all amendments) applies to
this document.
GB 190 Packing symbol of dangerous goods
GB/T 601 Chemical reagent - Preparations of reference titration solutions
GB/T 602 Chemical reagent - Preparations of standard solutions for impurity
GB/T 603 Chemical reagent - Preparations of reagent solutions for use in test
methods
GB/T 6003.1-2012 Test sieves - Technical requirements and testing - Part 1.Test
sieves of metal wire cloth
GB/T 6678 General principles for sampling chemical products
GB/T 6679 General rules for sampling solid chemical products
GB/T 6682 Water for analytical laboratory use - Specification and test methods
6.2.2.1 Principle
The sample is eluted with carbon disulfide and weighed. The mass fraction of sulfur in
industrial sulfur is calculated. This method is suitable for the determination of sulfur
mass fraction in high-quality sulfur.
6.2.2.2 Reagents
Carbon disulfide.
6.2.2.3 Instruments and equipment
6.2.2.3.1 Glass sand core crucible. No.3, pore diameter 16 μm ~ 30 μm, volume 30 mL.
6.2.2.3.2 Suction filter bottle. 500 mL.
6.2.2.3.3 Vacuum pump.
6.2.2.3.4 Constant temperature drying oven. The temperature can be controlled from
105 °C to 110 °C.
6.2.2.3.5 Balance. Accurate to 0.001 g.
6.2.2.4 Test procedures
Weigh 2 g ~ 3 g of specimen, accurate to 0.0001 g. Place it in a glass sand core crucible,
that has been dried to constant weight at 105 °C ~ 110 °C.
Connect the air extraction device. In the fume hood, install the glass sand core crucible
containing the sample on the filter bottle. Use a dropper to add an appropriate amount
of carbon disulfide into the crucible. Use a glass rod to stir to dissolve the sulfur. Turn
on the vacuum pump to filter at a suitable rate. Continue washing and dissolving with
carbon disulfide, until most of the sulfur is dissolved. Then use carbon disulfide to wash
the crucible wall and bottom. Conduct suction filter.
Move the glass sand core crucible containing the residue into a constant temperature
drying oven, which has a temperature of 105 °C ~ 110 °C, to dry for 45 minutes. Take
it out and place it in a desiccator, to cool to room temperature. Then use carbon disulfide
to wash the crucible 5 ~ 8 times. Move it into a constant temperature drying oven, which
has a temperature of 105 °C ~ 110 °C, to dry for 30 minutes. Take it out and place it in
a desiccator to cool to room temperature. Then weigh it, accurate to 0.0001 g. Repeat
the above operation with carbon disulfide, until the difference between two consecutive
weighing does not exceed 0.0003 g.
6.2.2.5 Test data processing
The mass fraction of sulfur (ω1) is calculated according to formula (2).
6.6.1.3.3 Barium hydroxide solution. c [1/2 Ba(OH)2] = 0.05 mol/L. Prepare freshly
when using. Add a few drops of phenolphthalein indicator solution to the solution. The
solution needs to be isolated from carbon dioxide in the air with a collection tube filled
with alkali asbestos.
6.6.1.3.4 Hydrogen peroxide solution. 1 + 4.
6.6.1.3.5 Hydrochloric acid standard titration solution. c (HCl) = 0.5 mol/L.
6.6.1.3.6 Hydrochloric acid standard titration solution. c (HCl) = 0.05 mol/L. Measure
50.00 mL of hydrochloric acid standard titration solution (6.6.1.3.5) into a 500 mL
volumetric flask. Use water to dilute to the mark. Shake well. Prepare this solution
before use.
6.6.1.3.7 Sodium hydroxide standard titration solution. c (NaOH) = 0.5 mol/L.
6.6.1.3.8 Sodium hydroxide standard titration solution. c (NaOH) = 0.05 mol/L.
Measure 50.00 mL of sodium hydroxide standard titration solution (6.6.1.3.7) into a
500 mL volumetric flask. Use water to dilute it to the mark. Shake well. Prepare this
solution before use.
6.6.1.3.9 Methyl red-methylene blue mixed indicator solution.
6.6.1.3.10 Phenolphthalein indicator solution. 10 g/L.
6.6.1.3.11 Platinum asbestos. Contain platinum mass fraction of 5% ~ 10%.
6.6.1.3.12 Alkali asbestos.
6.6.1.3.13 Glass wool.
6.6.1.3.14 Oxygen. Pure oxygen, stored in cylinders, equipped with oxygen pressure
reducer.
6.6.1.4 Instruments and equipment
6.6.1.4.1 Porcelain boat. 88 mm × 12 mm.
6.6.1.4.2 Burette. 10 mL, graduation value 0.05 mL.
6.6.1.4.3 Combustion and absorption device. As shown in Figure 1.
As shown in Figure 1, connect the entire device with a short rubber tube.
6.6.1.5.2 Blank test
The tube furnace (F) is heated while oxygen is passed through the device at a flow rate
of approximately 100 mL/min.
When the temperature of the tube furnace F reaches 400 °C ~ 450 °C for about 30
minutes, remove the G5 and G6 scrubbing bottles. Add 20 mL of barium hydroxide
solution, 40 mL of water, 5 mL of hydrogen peroxide solution to each. Then connect
the G5 and G6 scrubbing bottles to the device. These operations shall be performed as
quickly as possible, to avoid absorbing carbon dioxide from the air.
While continuing to pass oxygen through the device at a flow rate of about 100 mL/min,
energize the tube furnace (E), to raise the temperature to 400 °C ~ 450 °C. Maintain
this temperature for about 10 minutes. Then continue to raise the temperature to 800 °C
~ 900 °C....
Get QUOTATION in 1-minute: Click GB/T 2449.1-2021
Historical versions: GB/T 2449.1-2021
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GB/T 2449.1-2021: Sulphur for industrial use -- Part 1: Solid product
GB/T 2449.1-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 71.060.10
CCS G 13
Replacing 2449.1-2014
Sulphur for industrial use - Part 1.Solid product
ISSUED ON. DECEMBER 31, 2021
IMPLEMENTED ON. JULY 01, 2022
Issued by. State Administration for Market Regulation.
Standardization Administration of PRC.
Table of Contents
Foreword... 3
Introduction... 5
1 Scope... 7
2 Normative references... 7
3 Terms and definitions... 8
4 Technical requirements... 8
4.1 Appearance... 8
4.2 Technical indicators... 8
5 Samples... 8
5.1 Sampling method... 8
5.2 Processing of laboratory sample... 9
5.3 Preparation of specimens... 9
6 Test methods... 10
6.1 General... 10
6.2 Determination of sulfur mass fraction... 10
6.3 Determination of moisture mass fraction... 12
6.4 Determination of ash mass fraction... 14
6.5 Determination of acidity mass fraction... 15
6.6 Determination of mass fraction of organic matter... 17
6.7 Determination of arsenic mass fraction... 24
6.8 Determination of mass fraction of iron... 28
6.9 Determination of mass fraction of powdered sulfur sieve residue... 33
7 Inspection rules... 34
8 Marking, packaging, transportation, storage... 34
9 Safety... 35
Sulphur for industrial use - Part 1.Solid product
Warning. Some reagents used in this document are toxic or corrosive. Some
operations are dangerous. This document does not disclose all possible safety
issues. Users shall strictly follow the relevant provisions for correct use and are
responsible for taking appropriate safety and health measures.
1 Scope
This document specifies the technical requirements, sampling, test methods, inspection
rules, marking, packaging, transportation, storage, safety of solid sulfur for industrial
use.
This document applies to solid industrial sulfur, which is produced from petroleum
refinery gas, natural gas, coal chemical acid gas, coke oven gas, flue gas, sulfur waste
gas recovery, pyrite.
2 Normative references
The contents of the following documents constitute essential provisions of this
document through normative references in the text. Among them, for dated reference
documents, only the version corresponding to the date applies to this document; for
undated reference documents, the latest version (including all amendments) applies to
this document.
GB 190 Packing symbol of dangerous goods
GB/T 601 Chemical reagent - Preparations of reference titration solutions
GB/T 602 Chemical reagent - Preparations of standard solutions for impurity
GB/T 603 Chemical reagent - Preparations of reagent solutions for use in test
methods
GB/T 6003.1-2012 Test sieves - Technical requirements and testing - Part 1.Test
sieves of metal wire cloth
GB/T 6678 General principles for sampling chemical products
GB/T 6679 General rules for sampling solid chemical products
GB/T 6682 Water for analytical laboratory use - Specification and test methods
6.2.2.1 Principle
The sample is eluted with carbon disulfide and weighed. The mass fraction of sulfur in
industrial sulfur is calculated. This method is suitable for the determination of sulfur
mass fraction in high-quality sulfur.
6.2.2.2 Reagents
Carbon disulfide.
6.2.2.3 Instruments and equipment
6.2.2.3.1 Glass sand core crucible. No.3, pore diameter 16 μm ~ 30 μm, volume 30 mL.
6.2.2.3.2 Suction filter bottle. 500 mL.
6.2.2.3.3 Vacuum pump.
6.2.2.3.4 Constant temperature drying oven. The temperature can be controlled from
105 °C to 110 °C.
6.2.2.3.5 Balance. Accurate to 0.001 g.
6.2.2.4 Test procedures
Weigh 2 g ~ 3 g of specimen, accurate to 0.0001 g. Place it in a glass sand core crucible,
that has been dried to constant weight at 105 °C ~ 110 °C.
Connect the air extraction device. In the fume hood, install the glass sand core crucible
containing the sample on the filter bottle. Use a dropper to add an appropriate amount
of carbon disulfide into the crucible. Use a glass rod to stir to dissolve the sulfur. Turn
on the vacuum pump to filter at a suitable rate. Continue washing and dissolving with
carbon disulfide, until most of the sulfur is dissolved. Then use carbon disulfide to wash
the crucible wall and bottom. Conduct suction filter.
Move the glass sand core crucible containing the residue into a constant temperature
drying oven, which has a temperature of 105 °C ~ 110 °C, to dry for 45 minutes. Take
it out and place it in a desiccator, to cool to room temperature. Then use carbon disulfide
to wash the crucible 5 ~ 8 times. Move it into a constant temperature drying oven, which
has a temperature of 105 °C ~ 110 °C, to dry for 30 minutes. Take it out and place it in
a desiccator to cool to room temperature. Then weigh it, accurate to 0.0001 g. Repeat
the above operation with carbon disulfide, until the difference between two consecutive
weighing does not exceed 0.0003 g.
6.2.2.5 Test data processing
The mass fraction of sulfur (ω1) is calculated according to formula (2).
6.6.1.3.3 Barium hydroxide solution. c [1/2 Ba(OH)2] = 0.05 mol/L. Prepare freshly
when using. Add a few drops of phenolphthalein indicator solution to the solution. The
solution needs to be isolated from carbon dioxide in the air with a collection tube filled
with alkali asbestos.
6.6.1.3.4 Hydrogen peroxide solution. 1 + 4.
6.6.1.3.5 Hydrochloric acid standard titration solution. c (HCl) = 0.5 mol/L.
6.6.1.3.6 Hydrochloric acid standard titration solution. c (HCl) = 0.05 mol/L. Measure
50.00 mL of hydrochloric acid standard titration solution (6.6.1.3.5) into a 500 mL
volumetric flask. Use water to dilute to the mark. Shake well. Prepare this solution
before use.
6.6.1.3.7 Sodium hydroxide standard titration solution. c (NaOH) = 0.5 mol/L.
6.6.1.3.8 Sodium hydroxide standard titration solution. c (NaOH) = 0.05 mol/L.
Measure 50.00 mL of sodium hydroxide standard titration solution (6.6.1.3.7) into a
500 mL volumetric flask. Use water to dilute it to the mark. Shake well. Prepare this
solution before use.
6.6.1.3.9 Methyl red-methylene blue mixed indicator solution.
6.6.1.3.10 Phenolphthalein indicator solution. 10 g/L.
6.6.1.3.11 Platinum asbestos. Contain platinum mass fraction of 5% ~ 10%.
6.6.1.3.12 Alkali asbestos.
6.6.1.3.13 Glass wool.
6.6.1.3.14 Oxygen. Pure oxygen, stored in cylinders, equipped with oxygen pressure
reducer.
6.6.1.4 Instruments and equipment
6.6.1.4.1 Porcelain boat. 88 mm × 12 mm.
6.6.1.4.2 Burette. 10 mL, graduation value 0.05 mL.
6.6.1.4.3 Combustion and absorption device. As shown in Figure 1.
As shown in Figure 1, connect the entire device with a short rubber tube.
6.6.1.5.2 Blank test
The tube furnace (F) is heated while oxygen is passed through the device at a flow rate
of approximately 100 mL/min.
When the temperature of the tube furnace F reaches 400 °C ~ 450 °C for about 30
minutes, remove the G5 and G6 scrubbing bottles. Add 20 mL of barium hydroxide
solution, 40 mL of water, 5 mL of hydrogen peroxide solution to each. Then connect
the G5 and G6 scrubbing bottles to the device. These operations shall be performed as
quickly as possible, to avoid absorbing carbon dioxide from the air.
While continuing to pass oxygen through the device at a flow rate of about 100 mL/min,
energize the tube furnace (E), to raise the temperature to 400 °C ~ 450 °C. Maintain
this temperature for about 10 minutes. Then continue to raise the temperature to 800 °C
~ 900 °C....
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