This standard specifies the technical requirements, test methods, packaging, marking, transportation, storage and other requirements for petroleum mixed xylene. This standard applies to petroleum mixed xylene produced by light refining and separation of reformed oil obtained from the catalytic reforming process or light tar obtained from the ethylene cracking process. This product is used as chemical raw material and solvent. GB 3407-1990 Petroleum mixed xylene GB3407-1990 standard download and decompression password: www.bzxz.net

National Standard of the People’s Republic of China
Petroleum xylene mixed The first-grade product of toluene adopts the international standard ISO5280-1979 "Industrial Xylene - Specifications". Subject content and scope of application
This standard specifies the technical requirements, test methods, packaging, marking, transportation, storage and other requirements for petroleum mixed xylene. This standard applies to petroleum mixed xylene obtained by refining and separating the reformed oil obtained from the catalytic reforming process or the light tar obtained from the ethylene cracking process.
This product is used as chemical raw material and solvent.
2 cited standards
GB511
Determination of mechanical impurities in petroleum products and additives (gravimetric method) GB1816
GB2012
GB2013
GB3143
GB3146
GB3209
Method for determination of reaction of benzene products
Aromatic hydrocarbon pickling test method
Determination of density of benzene products
Liquid Chemical product color determination method (Hazen unit - one platinum - diamond color number) benzene product distillation range determination method
benzene product evaporation residue determination method Www.bzxZ.net
petroleum and liquid petroleum product sampling method (manual Method) GB4756
Industrial aromatic hydrocarbon copper sheet corrosion test method
GB11138
ZBE30005
ZBE31002
Petroleum product packaging, storage, transportation and delivery acceptance rules for aromatic hydrocarbons Qualitative test method for mercaptans in light petroleum products (Ph.D. test method) Determination of trace sulfur in light petroleum products (nickel reduction method) SY2505
Determination of total sulfur content in light petroleum products (electricity method) SY2506
3 Technical requirements and test methods
3.13°C mixed xylene and 5°C mixed xylene are divided into superior products and first-class products according to quality. 3.2 The quality indicators and test methods of petroleum mixed xylene are shown in the table below. Approved by the State Bureau of Technical Supervision on 1990-12-30 and implemented on 1991-10-01
Appearance
Item
Project
Variety
Quality level||tt ||Color (Hazen unit
Density (20°C), kg/m
Distillation range,
Initial boiling point
Final boiling point
Total Distillation range
Pickling colorimetry
Total sulfur content, mg/kg
Platinum-diamond color number) is not deeper than
and is not lower than ||tt| |Not higher than
Not greater than
Not greater than
Evaporation residue, mg/100mL
Copper sheet corrosion
PhD test
Neutral test
not greater than
GB3407-90
quality index
3℃ mixed xylene
superior product
first grade Product
5℃ mixed xylene
Excellent product
Transparent liquid, no insoluble water and mechanical impurities 20
862~868
860~870
137.5
141.5
3
860~870
137
143
5
one Grade
The color of the acid layer is not dark. The color of the acid layer is not dark. The color of the acid layer is not dark. Dilute to 1000mL. Dilute to 1000mL. Dilute to 1000mL. Dilute to 1000mL. Dilute acid contains 0.5g. Acid contains 0.78 acid. Containing 0.58 acid in 0.7g test method
Visual inspection
GB3143
GB2013
GB3146
GB2012
Standard for potassium dichromate Standard solution of potassium dichromateStandard solution of potassium dichromateStandard solution of potassium dichromate
quasi-solution
pass
quasi-solution
3
5
No corrosion
Pass
Neutral
Note: 1) Visual inspection at 20±3℃. When there is a dispute about mechanical impurities, use the GB511 method to measure them and it should be none. 2) The SY2505 method is allowed to be used for determination. In case of dispute, the SY2506 method shall prevail. 4 Packaging, marking, transportation, storage
Packaging, marking, storage, transportation and delivery acceptance shall be carried out in accordance with ZBE30005. 5 Sampling
Sampling shall be carried out in accordance with GB4756, and 2L shall be taken for inspection and sample retention. Additional notes:
This standard is proposed by China Petrochemical Corporation. This standard is under the technical jurisdiction of the Petrochemical Science Research Institute. This standard is drafted by the Petrochemical Science Research Institute. The main drafter of this standard is Xu Rongling.
quasi-solution
SY2506n)
GB3209
GB11138
ZBE31002
GB1816
3C mixed xylene in this standard The first-class product is formulated with reference to the Japanese Industrial Standard JISK2435-1985 "Xylene". The superior products of 3C and 5℃ mixed xylene are formulated with reference to the Class A products in the Soviet national standard rOCT9410-78 (valid in 1990) "Xylene" and the first-class products in the British standard BS458-1977 "Xylene".
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