Reference

Recovery of aromatic hydrocarbons and a nonaromatic raffinate stream from a hydrocarbon charge stock

Recovery of aromatic hydrocarbons and a nonaromatic raffinate stream from a hydrocarbon charge stock. Asselin, George F. (UOP Inc. , USA). U.S. US 4419226 A 6 Dec 1983, 6 pp. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C07C007-08. NCL: 208325000. APPLICATION: US 80-163446 26 Jun 1980. DOCUMENT TYPE: Patent CA Section: 51 (Fossil Fuels, Derivatives, and Related Products) In sulfolane [126-33-0] extn. of aroms. from a hydrocarbon stock, in which the rich solvent is stripped to remove residual nonaroms. and then stream-stripped before fractionation, the steam condensate is freed of aroms. by treatment with part of the nonarom. raffinate before being used to ext. sulfolane from the remaining raffinate. The raffinate stream is recovered free of aroms. Thus, a low-b.p. fraction of depentanized catalytic reformate was sepd. into a C6H6-PhMe-xylene fraction (e.g., 599.8 mol/h contg. 3 mol H2O/h) and a raffinate of C6-C8 paraffins. The steam-condensate recycle, ready for extn. of sulfolane from the raffinate, contains f100 ppm aroms.

Sulfolane-based electrolytes for secondary lithium batteries

Sulfolane-based electrolytes for secondary lithium batteries. Yen, S. P. S.; Carter, B.; Shen, D.; Somoano, R. (Jet Propuls. Lab., California Inst. Technol., Pasadena, CA 91109, USA). Proc. Power Sources Symp., 30th, 71-3 (English) 1982. CODEN: PSSYAD. ISSN: 0079-4457. DOCUMENT TYPE: Journal CA Section: 52 (Electrochemical, Radiational, and Thermal Energy Technology) Section cross-reference(s): 76 Conductivities of LiAsF6 in sulfolane [126-33-0], 3-methylsulfolane [872-93-5], and 3-methylsulfolane-2-methyltetrahydrofuran mixt. were studied as a function of temp. Results on cycle life of Li/1.3M LiAsF6-3-methylsulfolane/TiS2 batteries are presented. It was possible to cycle the battery at 60° for >352 cycles before its capacity droped to <30% of initial capacity. Sulfolane-based solvents hold promise for achieving improved stability and cycle life at moderate temps.