Patent ID: 7097715

Claim:
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 j H 2j+1 , or C j H a F b wherein j is an integer between one and (13−3(x+y+z)), inclusive, a and b each is independently an integer between zero and 2j+1, inclusive, and a+b=2j+1; R 1-12 are independently C m H n F p or C d H e F g where m is an integer between zero and two, inclusive, n and p are integers between zero and five, inclusive and n+p=2m+1, d is an integer between zero and two, inclusive, e and g are integers between zero and five, inclusive, and e+g=2d+1; and 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.