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Sulfolane W
Sulfolane W is a grade of sulfolane with 3% water content by weight that lowers the freezing point for easier handling in industrial applications, including extracting benzene, toluene, and xylene from refinery reformate.
Sulfolane W, also referred to as tetramethylene sulfone, is a distinctive grade of sulfolane characterized by its 3% water content by weight. This small addition of water significantly lowers the solvent's freezing point, facilitating more manageable transport and storage, especially for those industrial applications where the utmost purity is not a critical requirement. As a highly dipolar, low-viscosity, aprotic organosulfur solvent, sulfolane effectively dissolves a wide range of polar compounds. Additionally, its low toxicity and minimal skin penetration risks enhance its safety profile in various chemical processes. Notably, sulfolane remains thermally stable at elevated temperatures, ensuring consistent performance in demanding conditions. Sulfolane W is extensively utilized in the BTX extraction process, effectively separating aromatic hydrocarbons, such as benzene, toluene, and xylene, from refinery reformate. It also serves as an efficient foam inhibitor within the process of removing mercaptans and other organic sulfur compounds.
Specifications
Ash: 0.1 max Distillation, 5%: 282 min Distillation, 95%: 288 max Sulfolane, anhydrous: 96.5 min Freezing point: 5.5°C–10°C (41.9°F–50°F) CAS number: 126-33-0 Molecular formula: C4H8O2
Primary Chemistry: Sulfolane, tetrahydrothiophene 1,1-dioxide
Features & Benefits
Dipolar, aprotic organosulfur solvent Low viscosity High stability Water solubility Lower freezing point than 99% sulfolane Easy storage and handling Low toxicity Low skin penetration Remains stable at high temperatures
Problems Solved
The extraction of aromatic hydrocarbons, such as benzene, toluene, and xylene, from refinery reformate can often be hindered by inefficient solvent performance, leading to suboptimal yields and increased operational time. High-purity grades of sulfolane have high freezing points, which can result in frozen solvents and costly and time-consuming reheating processes. Additionally, traditional solvents tend to degrade under high-temperature conditions, causing a decline in their extraction efficiency over time.
Applications
BTX extraction in petroleum refining Foam inhibitor in mercaptan and sulfur removal processes
Chevron Phillips Chemical high-purity sulfolane solvents have promising uses in emerging energy storage solutions like solid-state batteries. Learn why.
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