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GB/T 3711-2008: Method of determination for neutral oils and pyridine bases contents of phenol products
Status: Valid GB/T 3711: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 3711-2008 | English | 209 |
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Method of determination for neutral oils and pyridine bases contents of phenol products
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GB/T 3711-2008
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| GB/T 3711-1983 | English | 359 |
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Method of determination for neutral oils and pyridine bases contents of phenol products
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GB/T 3711-1983
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PDF similar to GB/T 3711-2008
Basic data | Standard ID | GB/T 3711-2008 (GB/T3711-2008) | | Description (Translated English) | Method of determination for neutral oils and pyridine bases contents of phenol products | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G17 | | Classification of International Standard | 71.080.90 | | Word Count Estimation | 9,979 | | Date of Issue | 2008-12-06 | | Date of Implementation | 2009-10-01 | | Older Standard (superseded by this standard) | GB/T 3711-1983 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.19 (Total No.132) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the measurement principle of phenolic products and pyridine bases of neutral oil, instrument, sampling, analysis step, results of calculation and precision. This standard applies to the determination of the resulting phenol fractionation products of coal tar neutral oils and pyridine alkali content. | GB/T 3711-2008: Method of determination for neutral oils and pyridine bases contents of phenol products
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Method of determination for neutral oils and pyridine bases contents of phenol products
ICS 71.080.90
G17
National Standards of People's Republic of China
Replacing GB/T 3711-1983
Phenol products neutral oils and pyridine alkali content
test methods
Posted 2008-12-06
2009-10-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard replaces GB/T 3711-1983 "neutral oils and pyridine phenol products Content Determination Method."
This standard compared with GB/T 3711-1983 The main changes are as follows.
--- Increasing the foreword;
--- Increase the scope, normative references documents, sample chapters;
--- Format is subject to change, the operation of the safety tips on the best method of pre-merger reagents and instruments section, the note on the operation of step
Among step;
--- An increase in the reagent "measurement process, unless otherwise indicated, are in line with national standards or the use of industry standard analytical reagent
And distilled water or equivalent purity "and" zeolite ";
--- The original "adding distilled water to the mark at zero at the ball" to "adding distilled water at 0.5mL mark with the ball to the mark" by
Plus "Before installing the instrument readings, record";
--- S-type receiving device to remove the glass elbow, the receiver position is changed, see Fig means;
--- Increased in accordance with the view of a mounting device, check air tightness;
--- Added "retain all distillate A, for determination of pyridine alkali content";
--- Pyridine base measurement indicator to bromophenol blue;
--- The results of formulas and symbols according to GB/T 20001.4-2001 "Rules for drafting standards - Part 4. Chemical analysis methods" attached
Record A. 14 regulations were rewritten;
--- Will analyze the erros of precision.
The standard proposed by China Iron and Steel Association.
This standard is under the jurisdiction of Metallurgical Industry Information Standards Institute.
This standard was drafted. Angang Steel Company Limited Chemical Plant, Metallurgical Industry Information Standards Institute.
The main drafters of this standard. off Yongyi, Zhang Mingming, Sun Wei, Yu Mei Chun, Ji.
This standard replaces the standards previously issued as follows.
--- GB/T 3711-1983.
Phenol products neutral oils and pyridine alkali content
test methods
Warning. do the test and pay attention to safety during the distillation, explosion-proof.
1 Scope
This standard specifies the measurement principle phenol products neutral oils and pyridine alkali content, instruments, sampling, analytical procedures and the results of calculation of the fine
density.
This standard applies to the determination of coal tar distillation products resulting phenolic neutral oils and pyridine bases content.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 1999 coking oil products sampling methods
Principle 3
Distillation to obtain neutral oils and pyridine bases from the sample in an aqueous alkaline solution. Neutral oil with xylene collected, measured by neutral oil collected
Plus size, is the neutral oil content; distilled water obtained from the distillate in an alkaline aqueous solution of the sample, with a standard solution of hydrochloric acid titration gathered steam
Water fraction pyridine base, with bromophenol blue as indicator, calculated pyridine alkali content.
4 Reagents and Instruments
Determination process, unless otherwise indicated, are in line with national standards or the use of industry standard analytical reagent and distilled water or equivalent purity
Of water.
4.1 Xylene. AR.
4.2 Sodium hydroxide solution. 27% solution.
4.3 hydrochloric acid solution. 0.1mol/L standard solution, 0.5mol/L standard solution or 1mol/L standard solution.
4.4 phenolphthalein indicator. 0.5g phenolphthalein dissolved in 100mL95% (volume fraction) ethanol.
4.5 bromophenol blue indicator. 0.3% solution preparation method of dissolving 0.3g bromophenol blue in 100mL40% ethanol.
4.6 Buret. volume 25mL, 0.1mL with sub-scale.
4.7 Erlenmeyer flask. volume 500mL, graduated.
4.8 pipette. Volume 5mL.
4.9 cylinder. the volume of 100mL.
4.10 gas lamp.
4.11 distillation apparatus. the volume of 1000mL hard glass decanter, glass tube splash ball, bubble tube, a cooling tube, glass receptacle,
500mL conical flask with a volume scale composition, as shown in Figure 1 to 6.
Figure 1 apparatus for distillation assembly drawing
Millimeters
Figure 2 glass bulb splash
Millimeters
Figure 3 bubble tube
Millimeters
Figure 4 condenser
Millimeters
5 glass sink
Millimeters
6 round-bottomed distillation flask
5 samples taken
Performed according to GB/T 1999 regulations.
Step 6 Analysis
6.1 Determination of neutral oil
6.1.1 Prior to testing, the receiver and the Erlenmeyer flask strict cleaning lotion clean, the receiver section with lotion scale foam wash with distilled
Rinse.
6.1.2 In a clean sink, add distilled water to the mark 0.5mL ball at the mark, and then added with a pipette 3mL ~ 4mL
Xylene, xylene careful not to drop the ball on the wall, standing stand before installation instrument readings recorded.
6.1.3 accurately weighed sample evenly 100mL, (if the sample during the distillation of crude phenol foam easily affect distillation, sample volume can be reduced to
50mL; neutral oil or solid matter content greater than 1mL long time, sample volume reduced to 50mL) was poured into 1000mL distillation flask, and the amount of
Barrel sample stream as much as possible, with the same sodium hydroxide solution was added 170mL graduated cylinder, and at the same time shake the bottle, followed by the graduated cylinder add
100mL of distilled water (sample volume is 50mL when analyzed, add 85mL of sodium hydroxide solution, coupled with 185mL distilled water), full roll
Uniform, in order to prevent bumping, add a few slices of various porcelain pieces.
6.1.4 25mL measuring cylinder with a sodium hydroxide solution was poured into 25mL bubble tube.
6.1.5 ensure bubble tube is not blocked, and then open the cooling water, cooling water condenser maintained continuously, heated to distill, distillation, distillation
Put a bottle of asbestos network, about the middle of the circular asbestos 50mm diameter. When the condensate liquid begins to flow, that is, open the lower part of the piston and receiver
Keeping close xylene liquid column height 4mL to gather 200mL distillate within about 30min ~ 40min distillation rate distillation distillate
The inner surface of the fluid flow along the receptacle, during the distillation (or melt condensation ago) does not allow steam to escape from the end of the condenser.
6.1.6 When the solids occurs when distilled liquid close 180mL, closed cooling water to melt the coagulated solids, solids to be full penetration, open
Cooling water, 200 mL of distillate was approaching, the heating was stopped, the condensate is dropped completely. The residue is hot pour, if the residue curing phenomenon, in
Bubble tube upper portion of hot water to melt slowly added, if the bottom caking, dilute sulfuric acid wash to soak.
6.1.7 xylene so receptacle located scale section, standing 15min, accurately read the volume of xylene.
6.1.8 The receiver of an aqueous solution of xylene and move all Erlenmeyer flask and distillate were combined and washed twice with distilled water 20mL
Di receiver, washing liquid incorporated into a conical flask, retain all distillate A, for determination of alkali content of pyridine.
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