GB/T 17602-2018Commercial hexanes (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB 17602-1998, Commercial hexanes. Compared with GB 17602-1998, apart from editorial changes, the main technical changes are as follows:

- the standard has been changed from mandatory to recommended;

- a product classification has been added (see Clause 3 and Table 1);

- a requirement for n-hexane content has been added (see Table 1);

- the requirements for sulfur content, bromine index and benzene content have been tightened (see Table 1);

- the distillation range limits and test method have been modified (see Clause 2 and Table 1);

- a test method for benzene content has been added (see Clause 2 and Table 1);

- inspection rules and safety content have been added (see Clause 5 and Clause 7).

This standard was proposed by and is under the jurisdiction of the National Technical Committee on Petroleum Products and Lubricants of Standardization Administration of China (SAC/TC 280).

Drafting organisations of this standard: Research Institute of Petroleum Processing of China Petroleum & Chemical Corporation (SINOPEC), Nanjing Zhongshang Huatian Petrochemical Co., Ltd., and SINOPEC Jinling Company.

Main drafters of this standard: Long Huali, Zhang Wenliang, Luan Guohong.

The previous editions of the standard replaced by this standard are:

- GB 17602-1998.

Warning

WARNING - If appropriate precautions are not taken, the products covered by this standard may present hazards during production, storage, transportation and use. This standard does not purport to address all safety problems associated with the product. It is the responsibility of the user to take appropriate safety and health measures and to ensure compliance with the conditions stipulated by the relevant national laws and regulations.

1 Scope

This standard specifies the product classification, requirements and test methods, inspection rules, marking, packaging, transportation, storage and safety of commercial hexanes produced by refining petroleum fractions.

This standard is applicable to commercial hexanes used as hexane solvent in chemical synthesis processes (such as the polymerisation of polypropylene, polybutene and ethylene-propylene rubber), in the preparation of adhesives, coatings and inks, and in various extraction processes.

This standard is not applicable to hexane used for the extraction of edible vegetable oils and proteins.

2 Normative references

The following 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 190 Packing symbol of dangerous goods

GB/T 1884 Crude petroleum and liquid petroleum products - Laboratory determination of density - Hydrometer method

GB/T 1885 Petroleum measurement tables

GB/T 3143 Method of colour determination for liquid chemical products (Hazen unit - platinum-cobalt scale)

GB/T 3555 Standard test method for Saybolt colour of petroleum products (Saybolt chromometer method)

GB/T 4756 Method for manual sampling of petroleum liquids

GB/T 6536 Standard test method for distillation of petroleum products at atmospheric pressure

GB/T 11134 Standard test method for kauri-butanol value of hydrocarbon solvents

GB/T 11136 Determination of bromine index of petroleum hydrocarbons (potentiometric titration method)

GB/T 12688.9 Test method of styrene for industrial use - Part 9: Determination of trace benzene - Gas chromatography

GB 13690 General rules for classification and hazard communication of chemicals

GB/T 16483 Safety data sheet for chemical products - Content and order of sections

GB/T 17474 Test method for benzene content in hydrocarbon solvents (gas chromatography)

GB 30000.7-2013 Rules for classification and labelling of chemicals - Part 7: Flammable liquids

SH/T 0164 Rules for packaging, storage, transportation and delivery acceptance of petroleum products

SH/T 0253 Determination of total sulfur in light petroleum products (coulometric method)

SH/T 0604 Crude petroleum and petroleum products - Determination of density - Oscillating U-tube method

SH/T 0630 Determination of bromine number and bromine index of petroleum products (coulometric method)

SH/T 0689 Standard test method for determination of total sulfur in light hydrocarbons, motor fuels and oils (ultraviolet fluorescence method)

SH/T 0714 Standard test method for determination of individual components in naphtha (capillary gas chromatography)

ASTM D1078 Standard Test Method for Distillation Range of Volatile Organic Liquids

ASTM D1296 Standard Test Method for Odor of Volatile Solvents and Diluents

3 Product classification

The products covered by this standard are divided into two grades according to n-hexane content: No. 80 and No. 60.

4 Requirements and test methods

The technical requirements and test methods of the product shall comply with Table 1.

Table 1 - Requirements and test methods for commercial hexanes (quality indicators for No. 80 / No. 60; test method):

n-Hexane content (mass fraction), %, not less than: 80 / 60; SH/T 0714.

Distillation range: initial boiling point, °C, not lower than: 65; dry point, °C, not higher than: 71 (both grades); ASTM D1078 (a).

Density (20 °C), kg/m3: 655 to 680 (both grades); GB/T 1884 and GB/T 1885 (b).

Kauri-butanol value (c): by agreement; GB/T 11134.

Benzene content (mass fraction), %, not more than: 0.001 / 0.01; GB/T 12688.9 (d).

Odour: no residual odour (both grades); ASTM D1296.

Colour (either of the following): Saybolt colour number, not less than: +28, GB/T 3555; platinum-cobalt colour number, not more than: 10, GB/T 3143 (both grades).

Bromine index, mg/100 g, not more than: 20 / 50; SH/T 0630 (e).

Non-volatile matter content, mg/100 mL, not more than: 1.0 (both grades); Annex A.

Sulfur content, mg/kg, not more than: 1 / 5; SH/T 0253 (f).

Note a: GB/T 6536 may also be used; in case of dispute, ASTM D1078 shall be the referee method.

Note b: SH/T 0604 may also be used; in case of dispute, GB/T 1884 and GB/T 1885 shall be the referee methods.

Note c: whether this item is tested, and its limit, shall be agreed between supplier and purchaser.

Note d: the GB/T 17474 method may also be used; in case of dispute, GB/T 12688.9 shall be the referee method.

Note e: GB/T 11136 may also be used; in case of dispute, SH/T 0630 shall be the referee method.

Note f: the SH/T 0689 method may also be used; in case of dispute, SH/T 0253 shall be the referee method.

5 Inspection rules

6 Marking, packaging, transportation and storage

Marking, packaging, transportation and storage of the product shall be carried out in accordance with the relevant provisions of SH/T 0164, GB 13690 and GB 190. Products conforming to this standard shall be handled with dedicated containers, pipelines, pumps and means of transport during packaging, transportation and storage.

7 Safety

According to the national Implementation Guide to the Catalogue of Hazardous Chemicals (2015 edition) (trial), hexane is a flammable toxic liquid, and inhalation of large amounts has a narcotic effect. The product shall be stored sealed in a cool place, with strict attention to fire hazards. The hazard warnings for the product are given in Annex D of GB 30000.7-2013.

Information and guidance on specific hazards are given in the safety data sheet prepared by the supplier in accordance with GB/T 16483.

Annex A (normative) Determination of non-volatile matter in commercial hexanes