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Solvent purification sulfolane

Polymerization Solvent. Sulfolane can be used alone or in combination with a cosolvent as a polymerization solvent for polyureas, polysulfones, polysUoxanes, polyether polyols, polybenzimidazoles, polyphenylene ethers, poly(l,4-benzamide) (poly(imino-l,4-phenylenecarbonyl)), sUylated poly(amides), poly(arylene ether ketones), polythioamides, and poly(vinylnaphthalene/fumaronitrile) initiated by laser (134—144). Advantages of using sulfolane as a polymerization solvent include increased polymerization rate, ease of polymer purification, better solubilizing characteristics, and improved thermal stabUity. The increased polymerization rate has been attributed not only to an increase in the reaction temperature because of the higher boiling point of sulfolane, but also to a decrease in the activation energy of polymerization as a result of the contribution from the sulfonic group of the solvent. [Pg.70]

Lagowski, J. J., Ed., The Chemistry of Non-Aqueous Solvents, Academic, New York. This series contains detailed accounts of the purification, properties, and handling of some major solvents Vol. 2(1967), hydrogen halides, amides, and ammonia Vol. 3(1970), sulfur dioxide and acetic acid Vol. 4 (1976), tetramethylurea, cyclic carbonates, and sulfolane Vol. 5A (1978), tri-fluoroacetic acid, hafosuffuric acids, interhalogens, inorganic halides and oxyhalides. [Pg.54]

UOP/Shell BTX, purification Reformate, pyrolysis gasoline Shell Sulfolane process liquid extraction and/or extractive distillation with sulfolane solvent 123 1998... [Pg.127]

J. F. Coetzee (ed.) Recommended Methods for the Purification of Solvents and Tests for Impurities, Pergamon Press, Oxford, 1982. (Acetonitrile, Sulfolane, Propylene carbonate. Dimethyl sulfoxide, V,7V-Dimethylformamide, Hexamethylphosphoric tiiamide. Pyridine, 1,2-Diaminoethane, N-Methylacetamide, and V-Methylpropionamide). [Pg.475]

Because of the difficulty of isolating this very air- and moisture-sensitive complex, for synthesis the crude product is best used directly. The solvent is removed using vacuum distillation, and the oily residue is dissolved in either the neat ligand or a sulfolane or acetone solution of the ligand. The products are much less sensitive to oxidation, which facilitates the purification procedure. [Pg.303]

Sulfolane is used as a polymerization solvent for the production of polysulfones, polysiloxanes, polyphenylene ethers, and other polymers. Sulfolane is said to increase the reaction rates, afford easier polymer purification, and improved thermal stability. Sulfolane is a solvent for dissolving a variety of polymers for use in the fiber-spinning process. Cellulose and cellulose ester polymers can be plasticized with sulfolane to give improved flexibility and other physical property improvements [12,13]. Other application areas that have used sulfolane include electronic and electrical, textile-dye uses, curing of polysulfide sealant, and as a catalyst in certain synthetic reactions. [Pg.287]


See other pages where Solvent purification sulfolane is mentioned: [Pg.215]    [Pg.421]    [Pg.355]    [Pg.690]    [Pg.355]    [Pg.629]    [Pg.1712]    [Pg.17]    [Pg.491]    [Pg.433]    [Pg.26]    [Pg.1706]    [Pg.690]    [Pg.4144]    [Pg.485]    [Pg.485]    [Pg.5703]    [Pg.122]   
See also in sourсe #XX -- [ Pg.299 ]




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