Product Overview

Liquefied Propylene is a colorless, flammable, and versatile olefin gas, serving as the second most important petrochemical feedstock globally after ethylene. This unsaturated hydrocarbon, with its reactive carbon-carbon double bond, is a fundamental building block for a vast array of consumer and industrial products. A significant portion of global propylene supply is derived as a co-product from steam crackers and fluid catalytic cracking (FCC) units in refineries. The availability, purity, and reliable supply of propylene are critical to manufacturing numerous plastics, fibers, and chemical intermediates that define modern life.

Basic Information

CAS No.	115-07-1
UN No.	UN1077 (Propylene)
Molecular Formula	C₃H₆
Hazard Classification	2.1 (Flammable gas)

Key Attributes & Parameters

Purity	Available in different grades
Physical State	Colorless gas at ambient conditions; easily liquefied under moderate pressure.liquefied propylene.
Boiling Point	-47.6 °C (-53.7 °F)
Vapor Density	Heavier than air (1.45 relative to air).
Critical Properties	Critical temperature

Features & Advantages

ssential Feedstock for Major Polymers

Propylene is the direct monomer for polypropylene (PP), one of the most versatile and widely used thermoplastics.

Versatile Intermediate for Key Chemicals

It is the primary precursor for acrylonitrile (for acrylic fibers, ABS), propylene oxide (for polyurethanes, propylene glycol), cumene (for phenol/acetone, leading to polycarbonates and epoxies), and oxo-alcohols (for plasticizers).

High Reactivity

Its alkene functionality allows for diverse reactions including polymerization, oxidation, alkylation, and hydroformylation, enabling a broad downstream product slate.

Multiple Production Pathways

Sourced from traditional refining/cracking and increasingly from on-purpose technologies (e.g., propane dehydrogenation - PDH), enhancing supply flexibility.

Functional Characteristics

The primary function of propylene is to serve as a reactive monomer and chemical intermediate. Its carbon-carbon double bond allows it to undergo chain-growth addition polymerization to form isotactic, syndiotactic, or atactic polypropylene. In chemical synthesis, it reacts in processes like ammoxidation (to acrylonitrile), chlorohydrination or hydroperoxidation (to propylene oxide), Friedel-Crafts alkylation (with benzene to form cumene), and hydroformylation (with syngas to form butyraldehyde). It is stored and transported as a liquefied gas under pressure in spheres, bullets, or via dedicated pipelines.

Primary Application Fields

Polymer Production

The largest application is the production of polypropylene (PP) for packaging, automotive components, textiles (non-wovens), and consumer goods.

Acrylonitrile (ACN)

Used to make acrylic fibers, ABS/SAN resins, and nitrile rubber.

Propylene Oxide (PO)

A key intermediate for polyether polyols (in polyurethane foams) and propylene glycol (in unsaturated polyester resins, antifreeze, food/pharmaceutical applications).

Cumene/Phenol

Cumene is cracked to produce phenol and acetone, essential for polycarbonates, epoxies, and nylon.

Oxo-Alcohols

Butyraldehyde from hydroformylation is converted to 2-ethylhexanol and butanol for plasticizers and solvents.

Other Uses

As a fuel gas (e.g., in the Polyfuel process), a refrigerant (R1270), and in the production of isopropyl alcohol.

Customer Collaboration Case

A major polypropylene (PP) compounder specializing in high-performance automotive materials needed to secure a stable, long-term supply of polymer-grade propylene to support a new production line for glass-filled PP compounds. Their challenge was ensuring feedstock consistency to meet stringent automotive industry specifications for mechanical strength and thermal stability. We entered into a multi-year supply agreement, providing a dedicated pipeline stream of our highest purity polymer-grade propylene. Our integrated logistics and real-time quality monitoring ensured the delivered propylene consistently exceeded purity specs, particularly for low levels of catalyst poisons like sulfur and oxygen. This reliable, high-quality propylene feedstock enabled the customer to optimize their polymerization catalysts, achieve exceptional batch-to-batch consistency in their PP resin, and successfully qualify their new compound with several Tier-1 automotive suppliers. This partnership solidified their position as a key material provider in the automotive sector and demonstrated the critical link between upstream propylene quality and downstream performance plastics.

FAQ

Q: What are the differences in the processing of export tax rebates for chemical products under different payment methods?

A: For T/T payment: Tax rebates can be processed based on the export customs declaration form, commercial invoice, and bank remittance receipt. The process is simple and the tax rebate cycle is approximately 1-2 months. For L/C payment: In addition to the above documents, a copy of the letter of credit and negotiation documents are also required. The tax rebate review is more stringent and the cycle is approximately 2-3 months. For D/P payment: Collection documents and remittance receipts need to be provided. Due to the higher risk of remittance, the tax rebate review cycle is longer (approximately 3-4 months). Our finance team is familiar with the tax rebate requirements for different payment methods and can assist customers in efficiently handling tax rebates.

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