1-hexene
I. Basic Information
1.1 Overview
1-Hexene (English name: 1-Hexene, aliases: Butyl ethylene, n-Butyl ethylene, Hexene-1) is an important linear α-olefin, i.e., an olefin with the double bond at the end of the molecular chain. Due to the high reactivity conferred by its terminal double bond, 1-Hexene has become an indispensable basic raw material in the chemical industry.
1.2 Physicochemical Properties
| Parameter | Value/Description |
|---|---|
| Chemical Formula | C₆H₁₂ / CH₂=CH(CH₂)₃CH₃ |
| Molecular Weight | 84.16 g/mol |
| CAS Number | 592-41-6 |
| Appearance | Colorless transparent liquid with a characteristic petroleum-like odor |
| Melting Point | -140℃ ~ -139.9℃ |
| Boiling Point | 62.8℃ ~ 64.5℃ |
| Density | Approx. 0.67~0.69 g/cm³ (20℃, lighter than water) |
| Flash Point | -26℃ (closed cup) ~ -9.4℃ (open cup), classified as a low flash point flammable liquid |
| Explosion Limits | 1.2% ~ 6.9% (by volume) |
| Vapor Pressure | 18.7 kPa (20℃) |
| Vapor Density | 2.9 (air = 1), heavier than air |
| Solubility | Insoluble in water (0.005 g/100ml at 20℃), readily soluble in organic solvents such as ethanol, diethyl ether, benzene |
Ⅱ. Core Attributes & Positioning
Alpha-olefins (LAO), C6 higher olefins, comonomer, polymer-grade 1-Hexene (≥99%), core restricted raw material, key raw material for high-end polyolefins
Ⅲ. Domestic Technological Breakthroughs (Hot Topics 2025-2026)
Ethylene trimerization process (chromium-based catalyst), Fischer-Tropsch synthetic oil separation, coal-based alpha-olefin separation technology, extractive distillation / catalytic distillation, independent intellectual property rights, break overseas monopoly 10,000-ton unit of Ningxia Coal Industry (successfully commissioned in Jan 2026), 100,000-ton LAO project of Wanhua Chemical, 50,000-ton 1-Hexene project of Guangxi Petrochemical, technologies of Yanshan Petrochemical & Daqing Petrochemical
Ⅳ. Downstream Application Highlights
Comonomer for LLDPE/HDPE, metallocene polyethylene (mPE), POE (Polyolefin Elastomer), PAO (high-performance lubricant base oil) High-grade films, pipes & cable materials, raw material for photovoltaic encapsulation film, floor heating pipe & automobile modified materials, fine chemical intermediates
Ⅴ. Market & Industrial Trends
Import substitution, concentrated capacity release (2025-2026), participation of central enterprises & private refining enterprises, coal-chemical & petrochemical industry coordination, industrial chain integration Market size over 250 million RMB (2026), strong demand for high-purity products, export to the Middle East.
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