GB/T 2293-2019 PDF English
US$90.00 · In stock · Download in 9 secondsGB/T 2293-2019: The method of quinoline-insoluble for pitch products of coal carbonization Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 2293: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 2293-2019 | English | 90 |
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The method of quinoline-insoluble for pitch products of coal carbonization
| Valid |
| GB/T 2293-2008 | English | 239 |
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3 days
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Pitch products of coal carbonization -- Determination of quinoline-insoluble
| Obsolete |
| GB/T 2293-1997 | English | 199 |
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2 days
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Solid products of coal carbonization--Determination of quinoline-insoluble
| Obsolete |
| GB/T 2293-1980 | English | RFQ |
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3 days
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Method for determination of the quinoline insolubles of coal tar pitchs
| Obsolete |
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GB/T 2293-2019: The method of quinoline-insoluble for pitch products of coal carbonization---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT2293-2019
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 71.080
G 18
Replacing GB/T 2293-2008
The method of quinoline-insoluble for pitch products
of coal carbonization
ISSUED ON: JUNE 04, 2019
IMPLEMENTED ON: JANUARY 01, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
Warning -- Users of this Standard shall have practical experience in formal
laboratory work. This Standard does not identify all possible security issues.
Users of this Standard are responsible for taking appropriate safety and health
measures and ensure conditions required by relevant national regulations. Test
personnel shall wear respirators, safety glasses and protective gloves during
test operation to complete testing in a mandatory fume hood... 5
1 Scope ... 5
2 Normative references ... 5
3 Test principles ... 6
4 Instruments and reagents ... 6
5 Sampling and preparation of sample ... 7
6 Test steps ... 7
7 Results ... 8
8 Allowable deviation ... 9
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 2293-2008 “Pitch products of coal carbonization
- Determination of quinoline-insoluble”. Compared with GB/T 2293-2008, main
technical changes are as follows:
- modified Scope (see Clause 1 of this Edition, Clause 1 of Edition 2008);
- modified technical requirements for weighing bottle (see 4.1.2 of this Edition,
4.1.2 of Edition 2008);
- added filter device; added suction-filtration of glass sand-core filter crucible
as well as use and processing methods (see 4.1.7 of this Edition);
- improved technical requirements for reagents - quinoline, toluene (see 4.2.1,
4.2.2 of this Edition, 4.2.1, 4.2.2 of Edition 2008);
- added technical requirements for reagents - acetone, diatomaceous earth
(see 4.2.3, 4.2.4 of this Edition);
- modified requirements for sample weighing (see 6.1 of this Edition, 6.2.1 of
Edition 2008);
- added provisions on processing of glass rod for stirring use (see 6.3 of this
Edition);
- added use and processing methods for filtering process filter aid
(diatomaceous earth) (see 6.5 of this Edition);
- modified washing steps after sample is dissolved; respectively used hot
quinoline, toluene, and acetone to wash successively (see 6.7, 6.8, 6.9 of
this Edition, 6.2.5 of Edition 2008);
- modified dosage volume of washing solution - hot quinoline (see 6.7 of this
Edition, 6.2.5 of Edition 2008);
- added washing steps for acetone after sample is dissolved (see 6.9 of this
Edition);
- added provisions on processing method of used glass sand-core filter
crucible (see 6.11 of this Edition);
- added precisions of coal tar and impregnated asphalt (see 8.3 of this
Edition).
This Standard was proposed by China Iron and Steel Association.
The method of quinoline-insoluble for pitch products
of coal carbonization
Warning -- Users of this Standard shall have practical experience in formal
laboratory work. This Standard does not identify all possible security
issues. Users of this Standard are responsible for taking appropriate
safety and health measures and ensure conditions required by relevant
national regulations. Test personnel shall wear respirators, safety glasses
and protective gloves during test operation to complete testing in a
mandatory fume hood.
1 Scope
This Standard specifies test principle, instruments and reagents, sampling and
preparation of sample, test steps, test result calculation and allowable deviation
for coal tar and quinoline-insoluble for pitch products of coal carbonization that
uses coal tar to produce.
This Standard is applicable to determinations of contents of coal tar and
quinoline-insoluble for pitch products of coal carbonization that uses coal tar to
produce.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
GB/T 1999, Sampling of coking oil products
GB/T 2000, Coking solid products - Sampling
GB/T 2291, Method for preparation of coal tar pitch specimens
GB/T 6005, Test sieves - Metal wire cloth perforated metal plate and
electroformed sheet - Nominal sizes of openings
GB/T 8170, Rules of rounding off for numerical values & expression and
judgement of limiting values
4.2.3 Acetone: analytical reagent.
4.2.4 Diatomite: analytical reagent, fineness is 40 meshes ~ 60 meshes. Place
diatomite in G4 glass sand-core filter crucible. Use laboratory water to wash
and filter. Place in drying oven. Dry to constant weight (2h~2.5h). Put it in dryer
to cool to room temperature for use.
5 Sampling and preparation of sample
5.1 Sample’s sampling is in accordance with GB/T 1999 and GB/T 2000.
5.2 Sample preparation is in accordance with GB/T 2291. After drying, use
mortar to grind into granules that pass through SSω500/315μm sieve.
5.3 For soft pitch sample: Melt sample first. Stir well. Ensure melting
temperature does not exceed 150°C. Melting time does not exceed 10min.
6 Test steps
6.1 Accurately weigh sample volume of which quinoline-insoluble content in
sample meets 75mg~150mg (to the nearest of 0.0002g). Place coal tar and
pitch samples in clean and dry 100mL beakers. Place modified pitch sample in
centrifugal test tube. Add 25mL of quinoline. Use glass rod to stir well.
6.2 Soak above beaker or centrifugal test tube that contains sample together
with hard glass washing bottle that contains quinoline into (75±5)°C constant
temperature water bath. Stir sample from time to time. Take it out after 30min
for suction-filtration.
6.3 Use hot quinoline to wash clean glass rod that is used to stir. Place washing
solution into beaker or centrifugal test tube that contains sample.
6.4 Place centrifugal test tube that contains modified pitch sample in centrifuge.
Perform centrifugation at a speed of 4000r/min for 20min. Take it out for suction-
filtration.
6.5 Install filter device. Add 2g~3g of dry diatomite into clean filter that is dried
to constant weight. Weigh all, to the nearest of 0.0001g.
6.6 Use a small amount of quinoline to wet diatomite in filter specified in 6.5.
Slowly pour dissolved sample into filter. Perform suction-filtration at the same
time.
6.7 Use 30mL of hot quinoline to wash beaker or centrifugal test tube in several
times, so as to make all residues transfer into filter. Then use 50mL of hot
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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