NB/SH/T 0407-2013 Test method for water-soluble acids or bases in petroleum waxes

AI-translated method card — human verification pending. This is not an official translation of the standard. Unclear source values remain unverified; check the original standard and product certificate before use.

Card type: Test method

1. Method number / full title / English name / replacement relationship

• Standard number: NB/SH/T 0407—2013
• Chinese title: Test method for water-soluble acids or bases in petroleum waxes
• English title: Standard test mmethod for water soluble acids and alkalis of petroleum wazes (original text as such, suspected source-text extraction noise, requires confirmation against the source standard (source-text extraction))
• Replacement relationship: replaces SH/T 0407—1992 "Test method for water-soluble acids or bases in petroleum waxes"
• Adoption relationship: modified adoption using the redrafting method of Japanese Industrial Standard JIS K 2252—1998 "Reaction test methods for petroleum products"
• Publication/implementation: published on 2013-06-08, implemented on 2013-10-01
• Issuing body: National Energy Administration
• Secretariat: Subcommittee on Petroleum Wax Products of the National Technical Committee for Petroleum Products and Lubricants (SAC/TC280/SC3)
• Drafting organization: Fushun Research Institute of Petroleum and Petrochemicals, China Petroleum & Chemical Corporation
• Drafters: Kang Geping, Zhao Bin
• First publication: year 1992, this is the first revision

2. Scope of application and non-applicability

• This standard specifies the test method for water-soluble acids or bases in petroleum waxes.
• This standard applies to paraffin wax and microcrystalline wax.
• Non-applicable scope: not provided in the available source.

3. Method principle

The sample is mixed with a certain amount of distilled water; paraffin wax is heated to 75℃ or just melted until transparent; microcrystalline wax is heated to above the drop melting point 10℃ or just melted until transparent; sufficient shaking allows water-soluble acids or bases to dissolve in the aqueous phase; after cooling, the aqueous layer solution is separated. Methyl orange and phenolphthalein indicators are added dropwise to two test tubes respectively, and the color change of the aqueous solution is observed to determine whether the sample contains water-soluble acids or bases.

4. Reagents and materials (purity / preparation)

• 4.1 Methyl orange indicator (1 g/L): weigh 0.1 g of methyl orange, dissolve in 70℃ of water, cool, and dilute to 100 mL.
• 4.2 Phenolphthalein indicator (10 g/L): weigh 1.0 g of phenolphthalein, dissolve in ethanol (95%), and dilute to 100 mL with ethanol.
• 4.3 Distilled water: meets the requirements for grade three water in GB/T 6682.
• 4.4 Glass rod.
• 4.5 Qualitative filter paper.

5. Apparatus and equipment

• 5.1 Conical flask: 250 mL.
• 5.2 Test tube: made of colorless glass, diameter 15 mm～20 mm, height 140 mm～150 mm.
• 5.3 Water bath.
• 5.4 Balance.
• 5.5 Graduated cylinder: 500 mL.

6. Recommended operating conditions

• Paraffin wax sample heating temperature: 75℃ or just melted until transparent.
• Microcrystalline wax sample heating temperature: above the drop melting point 10℃ or just melted until transparent.
• Amount of distilled water added: 30 mL.
• Sample weighing amount: 100 g ± 1 g.
• Indicator addition amount: methyl orange 1 drops～2 drops; phenolphthalein 1 drops～2 drops (the original text 6.3 is expressed as "add dropwise 1 drops, add methyl orange indicator", suspected source-text extraction noise, requires confirmation against the source standard (source-text extraction)).

7. Sampling and sample preparation

• Weigh sample 100 g ± 1 g, add 30 mL distilled water.
• Other sampling and sample preparation details: not provided in the available source.

8. Analysis procedure

• 6.2 Heat the conical flask in a water bath and stir with a glass rod until the paraffin wax sample is heated to 75℃ or just melted until transparent, and the microcrystalline wax sample is heated to above the drop melting point 10℃ or just melted until transparent; after cooling, use a glass rod to pierce two holes in the surface of the petroleum wax sample in the conical flask, and filter the aqueous solution under the wax layer with water-moistened filter paper.
• 6.3 Add about 10 mL of the filtered aqueous solution to each of two test tubes; add 1 drops～2 drops of methyl orange indicator to one test tube, and add 1 drops～2 drops of phenolphthalein indicator to the other test tube, and observe the color change of the filtrate.

9. Qualitative and quantitative determination and calculation formula

Judge the test results according to Table 1.

Table 1 Judgment of test results

• The test result for water-soluble acids or bases in petroleum wax is expressed as "contains acid", "contains base", or "none".
• Calculation formula: not provided in the available source.

10. Precision

Not provided in the available source.

11. Report

Not provided in the available source (only Chapter 7 "Expression of test results" is present).

12. Normative references

• GB/T 603 Chemical reagents—Preparation of preparations and products used in test methods (GB/T 603—2002, ISO 6353-1:1982, NEQ)
• GB/T 2539 Determination of melting point of petroleum wax—Cooling curve method (GB/T 2539—2008, ISO 3841:1997, IDT)
• GB/T 6682 Specifications and test methods for water for analytical laboratory use (GB/T 6682—2008, ISO 3696:1987, MOD)
• GB/T 8026 Determination of drop melting point of petroleum wax and petrolatum (GB/T 8026—1987, eqv ISO 6244:1982)

13. Source and verification

This page is an AI translation of the available Chinese method card. Human verification is pending. It is not an official translation of the standard. Check the source standard and product certificate before use.

14. Quick Q&A