Tributyl Phosphate[2]
Overview
Tributyl Phosphate (TBP) is a colorless to pale yellow liquid with a mild odor. It is an organophosphorus compound primarily used as a solvent, extractant, and plasticizer. TBP is notable for its high boiling point, low volatility, and chemical stability, making it suitable for demanding industrial applications. First synthesized in the early 20th century, TBP gained prominence in the mid-20th century for its role in nuclear fuel processing, particularly in the PUREX (Plutonium-Uranium Redox Extraction) process. Its ability to selectively extract uranium and plutonium from spent nuclear fuel has made it indispensable in the nuclear industry.
Physical and Chemical Properties
Tributyl Phosphate exhibits a density of approximately 0.976-0.981 g/cm³ at 20°C and a boiling point of 289°C, though it tends to decompose at high temperatures. It is soluble in most organic solvents, including alcohols, ethers, and hydrocarbons, but only slightly soluble in water. TBP is chemically stable under normal conditions but can hydrolyze slowly in the presence of strong acids or bases. Its low volatility and high flash point (approximately 146°C) contribute to its safety profile in industrial settings. However, it is hygroscopic and may absorb moisture from the air over time.
Main Applications
TBP is widely used as a solvent and extractant in the nuclear industry, particularly in the PUREX process for reprocessing spent nuclear fuel. It selectively extracts uranium and plutonium from fission products, enabling their recovery and reuse. Beyond nuclear applications, TBP serves as a plasticizer in polymers, a solvent for cellulose esters, and an extractant for rare earth metals and other valuable metals in hydrometallurgy. It also finds use in the production of antifoaming agents, flame retardants, and specialty chemicals.
Safety and Storage
Tributyl Phosphate is classified as an irritant and can cause skin, eye, and respiratory tract irritation upon exposure. Proper personal protective equipment (PPE), including gloves, goggles, and respirators, should be used when handling TBP. Storage recommendations include keeping TBP in tightly sealed containers in a cool, dry, and well-ventilated area, away from heat sources and open flames. Incompatible materials include strong oxidizers and acids. Spills should be contained and cleaned up promptly using absorbent materials.
B2B Procurement Guide
When procuring Tributyl Phosphate, B2B buyers should prioritize suppliers with certifications such as ISO 9001 or nuclear-grade compliance, depending on the intended application. Key specifications to verify include purity (typically 98-99.5%), water content, and acidity. Bulk purchases (e.g., drums or tanker loads) often offer cost advantages, but buyers should ensure proper storage facilities are available. Logistics considerations include compliance with transportation regulations for hazardous chemicals, particularly for international shipments.
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