1-Butene
n-Butene
Chinese Alias: 1-Butene, Butene-1
English Name: 1-Butene
CAS No.: 106-98-9
PHYSICAL PROPERTIES
| Item | Value |
|---|---|
| Molecular Formula | C₄H₈ |
| Molecular Weight | 56.11 |
| Boiling Point, ℃ | -6.3 |
| Critical Temperature, ℃ | 146.4 |
| Critical Pressure, MPa | 4.02 |
| Flash Point, ℃ | -80 |
| Auto-ignition Temperature, ℃ | 385 |
I. Application Fields
1-Butene is an important basic chemical raw material, mainly used in the following fields:
1. Polymer Production (Core Application)
·Polyethylene Comonomer: Copolymerized with ethylene to produce High-Density Polyethylene (HDPE) and Linear Low-Density Polyethylene (LLDPE). This is the most important application of 1-butene. In the polyolefin sector, LLDPE is the largest consumption area, accounting for 81.5% of total consumption in 2024.
·Poly-1-butene (PB-1) Pipes: Used in pipes, films, and other applications, with the market size continuing to grow.
2. Chemical Intermediates
·Butadiene Production: Used to produce 1,3-butadiene, which is further used in the production of synthetic rubber.
Sec-butanol (SBA) and Methyl Ethyl Ketone (MEK): Synthesized through hydration reactions.
·Other Derivatives: Can be used to produce valeraldehyde, n-butanol, lubricant additives, methyl methacrylate (monomer for plexiglass), etc.
3. Other Uses
·Used as a standard gas and for preparing special standard gas mixtures.
·Used in the production of isoprene, synthetic rubber, etc.
II. Demand Structure Changes and Opportunities
Pressure on Traditional Sectors: LLDPE remains the largest consumption area, but under the trend toward high-end applications, the substitution of 1-butene by 1-hexene and 1-octene is accelerating.
Emerging Growth Drivers: Demand for fine chemicals such as poly-1-butene (PB-1) pipes and butanone (MEK) is growing at a rate exceeding 8%.
High-End Transformation: With the development of high-end materials such as Polyolefin Elastomers (POE), the demand for high-purity 1-butene is expected to grow.
III. Main Challenges
Structural Oversupply: Domestic 1-butene is experiencing a structural oversupply, mainly due to the homogenization of comonomer plastic grades.
Raw Material Price Fluctuations: Fluctuations in ethylene prices affect production costs.
Environmental Pressure: Integrated refining and chemical projects need to be equipped with carbon capture technologies. It is estimated that carbon emission intensity will decrease by 15%–20% by 2030 compared to 2026.
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