Reference

Non-azeotropic blends of 1,1,1,2-tetrafluoroethane, 1,1,1-trifluoroethane and pentafluoroethane and their use as refrigerating fluids

Non-azeotropic blends of 1,1,1,2-tetrafluoroethane, 1,1,1-trifluoroethane and pentafluoroethane and their use as refrigerating fluids. Fauvarque, Pierre; Macaudiere, Sylvie (Elf Atochem S.A., Fr.). Eur. Pat. Appl. EP 738774 A1 23 Oct 1996, 5 pp.Several reagents with their cas registry numbers 354-33-6 and 811-97-2 are used here. DESIGNATED STATES: R: BE, CH, DE, ES, FR, GB, IT, LI, NL. (French). (European Patent Organization). CODEN: EPXXDW. CLASS: ICM: C09K005-04. APPLICATION: EP 1996-400690 29 Mar 1996. PRIORITY: FR 1995-4725 20 Apr 1995. DOCUMENT TYPE: Patent CA Section: 48 (Unit Operations and Processes) Nonazeotropic mixts. contain 1,1,1,2-tetrafluoroethane 55-65, 1,1,1-trifluoroethane 1-27, and pentafluoroethane 10-44 wt.%. The mixts. are used to replace R-100 as a transportation refrigerant. .

Decomposition of chlorofluorocarbons and hydrofluorocarbons in water by ultrasonic irradiation

Decomposition of chlorofluorocarbons and hydrofluorocarbons in water by ultrasonic irradiation. Hirai, K.; Nagata, Y.; Maeda, Y. (College of Engineering, University of Osaka Prefecture, Sakai 593, Japan). Ultrasonics Sonochemistry, 3(3), S205-S207 (English) 1996 Elsevier. CODEN: ULSOER.There are some reagents with their cas registry numbers 76-13-1 and 811-97-2 are used in this study. ISSN: 1350-4177. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) The sonochem. degrdn. of CFC-113 (F2ClC-CCl2F), HCFC-225ca (F3C-CF2-CCl2H), HCFC-225cb (F2ClC-CF2-CClFH) and HFC-134a (F3C-CF2H) in water was investigated. The decompn. rates of CFC-113 increased with increasing the concn. of the CFC and at high concn. the rates far exceeded the rate of OH radical formation by water sonolysis, and OH radicals seemed to have little effect on the decompn. The pyrolysis in the cavitation bubbles was suggested. .