GB/T 13291-2008Butadiene for industrial use-specification (English PDF)

Foreword

This Standard replaces GB 13291-1991, Butadiene for industrial use -

Specification.

The main differences between this Standard and GB 13291-1991 are as follows.

-- Change it from a mandatory standard to a recommended standard;

-- Change the 1,3-butadiene indicator of the top grade from ">=99.3%" to

">=99.5%"; change the 1,3-butadiene indicator of the first grade from

">=98.0%" to ">=99.3%";

-- Change the total alkyne indicator of the top grade from "<=50 mg/kg" to "<=20

mg/kg"; change the total alkyne indicator of the first grade from "<=100

mg/kg" to "<=50 mg/kg";

-- Change the indicator of water of the first grade from "<=500 mg/kg" to "<=20

mg/kg";

-- Change the butadiene peroxide indicator of the top grade from "<=10 mg/kg"

to "<=5 mg/kg";

-- Change the polymerization inhibitor TBC indicator from "(50 ~ 150) mg/kg"

to "negotiated between the supplier and the buyer";

-- Change the gas-phase oxygen content indicator of the top grade from

"<=0.3%" to "<=0.2%";

-- Add quality indicators of qualified products;

-- Add notes to describe the appearance determination methods, and the

arbitration methods of 1,3-butadiene content and gas-phase oxygen

content;

-- Modify relevant contents of the normative references;

-- Revise the inspection rules; add relevant contents such as inspection

classification and limit value judgment;

-- Revise the storage and safety requirements.

This Standard was put forward by Sinopec Group.

This Standard shall be under the jurisdiction of Subcommittee on

Petrochemistry of National Standardization Technical Committee of Chemical

(SAC/TC 63/SC 4).

Butadiene for industrial use - Specification

1 Scope

This Standard specifies the requirements, test methods, inspection rules,

packaging, marking, transportation, storage and safety requirements of

butadiene for industrial use.

This Standard applies to the butadiene that is produced by extractive distillation,

of which dimethylformamide, acetonitrile, or N-methylpyrrolidone is used as the

solvent.

Structural formula. CH2 = CH-CH = CH2

Relative molecular mass. 54.0 (according to the international relative atomic

mass in 2005)

2 Normative references

The terms in the following documents become the terms of this Standard by

reference to this Standard. For dated references, all subsequent amendments

(not including errata content) or revisions do not apply to this standard. However,

parties to agreements that are based on this Standard are encouraged to study

whether the latest versions of these documents can be used. For undated

references, the latest edition applies to this Standard.

GB/T 1250, Representation and determination of limit values

GB/T 3723, Sampling of chemical products for industrial use - Safety in

sampling (GB/T 3723-1999, idt ISO 3165.1976)

GB/T 6015, Butadiene for industrial use - Determination of trace dimer - Gas

chromatographic method

GB/T 6017, Butadiene for industrial use - Determination of purity and

hydrocarbon impurities - Gas chromatographic method

GB/T 6020, Butadiene for industrial use - Determination of tert-butyl-catechol

(TBC)

GB/T 6022, Butadiene for industrial use - Determination of oxygen in

gaseous phase above liquid butadiene

GB/T 6023, Butadiene for industrial use - Determination of trace water -

Coulometric Karl Fischer method

according to this Standard. The acceptance period is determined by the supplier

and the buyer through consultation.

5 Packaging, transportation and storage