Patent ID: 6395699
Filing Date: 2002-05-28
Classification: C11D

Abstract:
A method for removing from an article, grease, oil, or flux, attached on said article comprising:i) contacting said article with the solvent composition comprising: (a) 61 to 67 wt. % dichloropentafluoropropane; (b) 27 to 32 wt. % of trans-1,2-dichloroethylene; and (c) 6 to 7 wt. % methanol, wherein said dichloropentafluoropropane consists of 40 to 75 wt. % of 3,3-dichloro-1,1,1,2,2-pentafluoropropane and from 25 to 60 wt. % of 1,3-dichloro-1,1,2,2,3- pentafluoropropane, ii) evaporating and isolating a solvent composition resulting from the contacting of step i) to obtain a solvent composition comprising: (a) 61 to 67 wt. % dichloropentafluoropropane; (b) 27 to 32 wt. % of trans-1,2-dichloroethylene; and (c) 6 to 7 wt. % methanol, wherein said dichloropentafluoropropane consists of 40 to 75 wt. % of 3,3-dichloro-1,1,1,2,2-pentafluoropropane and from 25 to 60 wt. % of 1,3-dichloro- 1,1,2,2,3-pentafluoropropane.