GB/T 2285-2018 in English
VALIDCoding xylene
- Issued on:2018-05-14
- Implemented on:2018-12-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$68.00
《GB/T 2285-2018焦化二甲苯》由TC469（全国煤化工标准化技术委员会）归口，TC469SC3（全国煤化工标准化技术委员会炼焦化学分会）执行，主管部门为国家标准化管理委员会。
Introduction
Overview of GB/T 2285-2018 Coking Xylene
GB/T 2285-2018 Coking Xylene is a national standard of the People's Republic of China, applicable to coking xylene obtained from crude benzene/light benzene recovered from coke oven gas through hydrogenation, distillation and other processes. The standard clearly stipulates technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, quality certificates and safety precautions.
Background of Standard Formulation and Analysis of Technological Evolution
The revision of the GB/T 2285 series of standards reflects the technological progress of my country's coking industry and the improvement of product quality requirements. Compared with the 1993 edition, the main technical changes in the new version of the standard are as follows:
- The scope of application has been modified, and the content of hydrogenation process has been added
- Normative references have been updated
- Technical indicators such as appearance and color have been refined
- Test methods and inspection rules have been optimized
- A new chapter on safety precautions has been added
Technical requirements for coking xylene
According to GB/T 2285-2018 standard, the technical indicators of coking xylene are divided into three categories: 3°C xylene, 5°C xylene and 10°C xylene. Specific indicators are as follows:
| Indicator name | Indicator | ||
|---|---|---|---|
| 3°℃ Xylene | 5°℃ Xylene | 10°℃ Xylene | |
| Appearance | Transparent liquid, no visible impurities | ||
| Color (platinum-cobalt) no darker than | 20# | ||
| Density (20℃)/(g/cm³) | 0.857~0.866 | 0.856~0.866 | 0.840~0.870 |
| Initial distillation point (atmospheric pressure 101325Pa)/°C is not less than | 137.5 | 136.5 | 135.0 |
| Final distillation point (atmospheric pressure 101325Pa)/°C is not greater than | 140.5 | 141.5 | 145.0 |
| Acid wash colorimetric (according to standard colorimetric solution) is not darker than | 0.6 | 2.0 | 4.0 |
| Moisture | No visible insoluble water at room temperature (18℃～25℃) | ||
| Neutral test | Neutral | ||
Standard Comparison Analysis
The following is the main technical comparison between GB/T 2285—2018 and GB/T 2285—1993:
| Dimension | GB/T 2285—1993 | GB/T 2285—2018 |
|---|---|---|
| Scope of application | Hydrogenation process is not specified | Hydrogenation process content is added |
| Normative references | - | Update and add multiple standards |
| Technical indicators | Color indicators are not included | Color technical indicators are added |
Implementation suggestions
1. Inspection and acceptance:It is recommended that enterprises establish a complete inspection system and conduct inspections in strict accordance with the test methods in the standards. For hydrogenation process products, focus on distillation range and acid washing colorimetric indicators.
2. Packaging and storage:Ensure that the packaging meets the requirements of GB 190, and the height of the xylene water layer in the tank truck or iron drum is strictly controlled. Store in a cool and ventilated place, away from fire and heat sources.
3. Safety management: The company should conduct safety training regularly and equip necessary protective equipment and fire-fighting facilities. Dispose of waste and spillage strictly in accordance with MSDS requirements.
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