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These features can improve both the efficiency and lifetime of the sieve. 3A molecular sieves are the necessary desiccant in petroleum and chemical industries for refining oil, polymerization, and chemical gas-liquid depth drying. 3A molecular sieves are used to dry a range of materials, such as ethanol, air, refrigerants, natural gas and ...
Tetrahydrofuran (THF), or oxolane, is an organic compound with the formula (CH 2) 4 O. The compound is classified as heterocyclic compound, specifically a cyclic ether. It is a colorless, water-miscible organic liquid with low viscosity. It is mainly used as a precursor to polymers. [8] Being polar and having a wide liquid range, THF is a ...
Liquid properties Std enthalpy change of formation, Δ f H o liquid? kJ/mol Standard molar entropy, S o liquid: 203.8 J/(mol K) Enthalpy of combustion, Δ c H o: −2501.2 kJ/mol Heat capacity, c p [2] 107.4 J/(mol K) at −108.39 °C 123.9 J/(mol K) at 25°C Gas properties Std enthalpy change of formation, Δ f H o gas: −184.2 kJ/mol ...
2-Methyltetrahydrofuran (2-MeTHF) is an organic compound with the molecular formula C 5 H 10 O. It is a highly flammable, mobile liquid. It is mainly used as a replacement for Tetrahydrofuran (THF) in specialized applications for its better performance, such as to obtain higher reaction temperatures, or easier separations (as, unlike THF, it is not miscible with water).
As a solvent, hexafluoro-2-propanol is polar and exhibits strong hydrogen bonding properties. Testament to the strength of its hydrogen-bonding tendency is the fact that its 1:1 complex with THF distills near 100 °C.
Molecular sieves are far more effective than most common methods for drying solvents and are safer and require no special equipment for handling. [1] Column solvent purification devices (generally referred to as Grubb's columns) recently became available, reducing the hazards (water reactive substances, heat) from the classical dehydrating methods.
Spray drying is a method of forming a dry powder from a liquid or slurry by rapidly drying with a hot gas. This is the preferred method of drying of many thermally-sensitive materials such as foods and pharmaceuticals , [ 1 ] or materials which may require extremely consistent, fine particle size.
Anhydrous sodium carbonate can be used as an "in bottle" drying agent for anhydrous THF, as it is not sufficiently nucleophilic to react. To be any use, the sodium carbonate has to be freshñly dried: actually, it's not that common these days, as most people who want really dry THF distill it directly from sodium benzophenone ketyl, but I think ...