Patent ID: 7097715
Filing Date: 2006-08-29
Classification: B08B,C11D,D06F,D06L

Abstract:
1. A process for cleaning a substrate selected from the group consisting of a textile, a flexible structure, a precision structure, a delicate structure, and a porous structure, comprising: placing the substrate in a perforated cleaning drum within a pressurizable cleaning vessel; adding organic solvent to the cleaning vessel; cleaning the substrate in the perforated cleaning drum with the organic solvent and in absence of pressurized fluid solvent; removing at least a portion of the organic solvent from the cleaning vessel; and thereafter removing a remaining portion of the organic solvent from the substrate using at least one pressurized fluid solvent, wherein: (a) the organic solvent is of the structural formula: wherein x, y, and z each is zero or one; at least one of x, y, and z is one; R″ is benzyl, phenyl, partially or fully fluorinated benzyl or phenyl, C R R′ is O, S, carbonyl or ester; and (b) when the pressurized fluid solvent is liquid carbon dioxide, the liquid carbon dioxide is at a subcritical condition.