Product Overview

n-Butene 99.50%, also known as 1-Butene or Butylene, is a linear, gaseous mono-olefin with a carbon-carbon double bond. This product specification guarantees a minimum purity of 99.50% n-butene, making it a high-grade feedstock for demanding polymerization and chemical synthesis processes. As a key intermediate in the petrochemical value chain, high-purity n-butene is primarily used to manufacture polyethylene copolymers and other important chemicals. Its controlled molecular structure and high reactivity make this specific grade of n-butene essential for producing polymers with enhanced properties and precise compositions.

Basic Information

CAS No.	106-98-9
UN No.	UN1012 (Butylene)
Molecular Formula	C₄H₈ (CH₂=CH-CH₂-CH₃)
Hazard Classification	2.1 (Flammable gas)

Key Attributes & Parameters

Purity	Minimum 99.50% n-butene by weight (typically 99.50% - 99.80% range).
Key Impurities	Isobutene (<0.15%), trans-2-butene & cis-2-butene (combined <0.35%), butane (<0.1%).
Physical State	Colorless, flammable gas; typically stored and shipped as a liquefied gas under pressure.
Boiling Point	-6.3 °C (20.7 °F) at atmospheric pressure.
Vapor Density	Heavier than air (~1.94 relative to air).

Features & Advantages

High-Purity Linear Monomer

The guaranteed minimum 99.50% n-butene content ensures a highly consistent and reliable comonomer for copolymer production, leading to predictable polymer performance.

Enhanced Polymer Properties

When used as a comonomer in LLDPE (Linear Low-Density Polyethylene) production, it introduces controlled short-chain branching, improving the film's toughness, flexibility, and tear strength.

Critical Chemical Intermediate

Serves as a primary raw material for producing butene-1 oxide, valeraldehyde, and other derivatives used in solvents, plasticizers, and specialty chemicals.

Precision Feedstock

Its specific grade makes it suitable for high-selectivity chemical processes where isomer purity significantly impacts catalyst performance and product quality.

Functional Characteristics

This high-purity n-butene primarily functions as a comonomer in Ziegler-Natta or metallocene-catalyzed copolymerization with ethylene to produce LLDPE. During polymerization, the butene molecules are incorporated into the polymer chain, creating controlled branches that lower density and modify crystallinity. Its chemical reactivity also allows it to undergo reactions such as hydration to produce secondary butanol, oxidation, and oligomerization. The product is supplied as a liquefied gas under pressure in cylinders, tube trailers, or via pipeline.

Primary Application Fields

Polymer Production (Primary Use)

Essential comonomer for manufacturing LLDPE resins used in flexible films (packaging, agricultural, stretch), injection molding, and rotomolding.

Chemical Synthesis

Feedstock for producing butene-1 oxide (used in surfactants, lubricant additives), valeraldehyde (for solvents, plasticizer alcohols), and linear oligomers (for synthetic lubricants, surfactants).

Polymer Modification

Used to modify properties of polypropylene (impact copolymer) and other polymers.

Fuel & Refining

Component in alkylation (to produce high-octane gasoline) and as a blendstock, though higher purity grades are typically dedicated to chemical use.

Customer Collaboration Case

A leading producer of premium cast-stretch film for industrial pallet wrapping was struggling with film consistency. Variations in the comonomer feed were causing fluctuations in the tensile strength and cling performance of their LLDPE. They required an exceptionally consistent, high-purity n-butene supply to act as the primary comonomer. We partnered with them, supplying our 99.50% minimum n-butene grade via a dedicated pipeline connection with real-time composition monitoring. The consistent, high-purity feed allowed their catalyst system to operate at peak efficiency, producing LLDPE resin with a perfectly uniform short-chain branching distribution. This resulted in a 40% reduction in film property variability, a 15% increase in ultimate elongation, and significantly improved load-holding performance. The reliable supply of our high-purity n-butene became a cornerstone of their quality control, enabling them to secure long-term contracts with major logistics companies and dominate the high-performance stretch film market segment.

FAQ

Q: How can one become a long-term partner of your company? What are the advantages of long-term cooperation?

A: The process of becoming a long-term partner: Initial communication of requirements → Sample testing and verification → Signing of framework cooperation agreement → Batch order cooperation → Establishment of exclusive service team. Long-term cooperation advantages: 1. Price discounts: Enjoy a stepped-down pricing model, reducing procurement costs; 2. Priority guarantee: Prior allocation of production capacity, shipping space, and raw materials, shortening delivery cycle; 3. Customization benefits: Priority access to customized products and technical services; 4. Risk sharing: Jointly addressing market fluctuations, policy changes, etc.; 5. One-stop service: Covering all processes from compliance, logistics, documents, to after-sales, hassle-free and efficient.

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