Tetrapropylene
Zouping Jinxing Chemical Co., Ltd. is one of the leading manufacturers and suppliers of tetrapropylene in China. If you're going to wholesale bulk tetrapropylene made in China, welcome to get free sample from our factory. All customized products are with high quality and low price.
Industrial source
Propylene undergoes oligomerization in a fixed-bed reactor using SPA (solid phosphoric acid) or ZSM-5/zeolite catalysts at 200–240°C and moderate pressure, yielding a mixed C9 (trimer) + C12 (tetramer) + C15 oligomer stream; the C12 narrow fraction-propylene tetramer-is subsequently isolated via vacuum fractionation. This process is often integrated with a nonene (propylene trimer) unit, with the tetramer serving as a byproduct or co-product of the trimerization unit.
Primary Uses
Tert-dodecyl mercaptan (TDM): Produced via the reaction of propylene tetramer with H₂S (catalyzed by acid clay or resin); serves as a key chain transfer agent/molecular weight regulator for SBR, ABS, and nitrile rubber polymerization-currently its most valuable application.
Dodecylphenol (DDP): Used to produce dodecylphenol polyoxyethylene ether (a non-ionic surfactant) and serves as a raw material for Antioxidant 264.
T746 Rust Inhibitor: Produced by the addition reaction with maleic anhydride to form dodecenyl succinic anhydride; used as a rust inhibitor in lubricants.
Branched-chain alkylbenzene (BAB): Tetrapropylene is used in industrial and metal cleaning agents (as a substitute for non-food-grade LAS).
Others: Tert-dodecylamine; isotridecyl alcohol/neotridecanoic acid (via oxo synthesis followed by hydrogenation); tetracosene (for further dimerization); alkyldiphenylether disulfonate (specialty surfactant for latex and textiles).
Safety, Storage, and Transportation
The acute toxicity of tetrapropylene is low to moderate (oral LD₅₀ in rats > 5 g/kg).; however, prolonged skin contact causes defatting and cracking, and it is significantly irritating to the eyes. GHS classifications: H315, H319, H304 (risk of aspiration pneumonia).
Flammable; flash point >70°C, yet still classified as a combustible liquid. Incompatible with strong oxidizers and peroxide initiators (due to reactivity of the olefinic bond).
Storage and transport: Store under nitrogen blanket or in full tanks, protected from light; add trace amounts of polymerization inhibitor (to prevent slight gelation during prolonged exposure to heat). Regulated as a Class 3 flammable liquid (Packing Group III).
FAQ
Q: Is it the same thing as "linear 1-dodecene"?
A: No, they are not the same. Tetrapropylene (PT) is a mixture of branched C12 olefins derived from propylene tetramerization; it biodegrades slowly and is used to produce branched ABS. 1-Dodecene (CAS 112-41-4) is a linear alpha-olefin derived from ethylene oligomerization; it is used to produce linear LAS (the mainstream choice for modern laundry detergents, as it is easily biodegradable). The two cannot be arbitrarily interchanged in an alkylbenzene production unit-branched products offer good low-temperature fluidity but are difficult to biodegrade, whereas linear products exhibit the opposite characteristics.
Q: Toxicity and Safety
A: It is a flammable liquid of low toxicity, but the following should be noted: It is irritating to the eyes, skin, and respiratory tract; prolonged contact causes skin defatting and cracking (R66), and aspiration following ingestion can cause pneumonia (R65); It is not a primary substance on lists of known carcinogens, but it carries a high risk of static electricity accumulation (non-polar liquid); GHS classification: H226 (flammable), H315/H319 (skin/eye irritation), H336 (dizziness/drowsiness), H412 (long-term aquatic hazard); In China, it is regulated as a flammable liquid (UN 2850 or 3295, Packing Group III).
Q: Handling and Storage
A: Ensure explosion-proof ventilation, maintain low flow velocity, and use grounding for static electricity prevention; PPE: Chemical-resistant gloves (nitrile/neoprene), safety goggles, and half-face respirator (for hydrocarbon vapors); Store in a sealed, cool, well-ventilated, explosion-proof warehouse; keep away from strong oxidizers (e.g., nitric acid, peroxides); For spills, collect using sand/soil or absorbent pads; do not flush with water (to prevent spreading); dispose of as oily hazardous waste through a qualified facility.
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