Azeotrope-like compositions and their use

A process for removing contaminants from the surface of a substrate comprising the step of contacting the substrate with one or more of the azeotrope-like compositions including (a) perfluorobutyl ethyl ether, consisting essentially of perfluoro-n-butyl ethyl ether and perfluoroisobutyl ethyl ether and mixtures thereof, and (b) organic solvent,;

• until the contaminants are dissolved, dispersed or displaced in or by the azeotrope-like composition, and removing the azeotrope-like composition containing the dissolved, dispersed or displaced contaminants from the surface of the substrate,
• which composition is selected from the group consisting of:
• wherein the composition is selected from the group consisting of:
• (i) compositions consisting essentially of about 89 to 38 weight percent of the ether and about 11 to 62 weight percent 1-chlorobutane that boil at about 68° to 70° C. at 736 torr;
• (ii) compositions consisting essentially of about 94 to 71 weight percent of the ether and about 6 to 29 weight percent 1,2-dichloropropane that boil at about 73° to 75° C. at 738 torr;
• (iii) compositions consisting essentially of about 76 to 40 weight percent of the ether and about 24 to 60 weight percent 2,2-dichloropropane that boil at about 65° to 67° C. at 731 torr;
• (iv) compositions consisting essentially of about 46 to 4 weight percent of the ether and about 54 to 96 weight percent trans-1,2-dichloroethylene that boil at about 43° to 45° C. at 729 torr;
• (v) compositions consisting essentially of about 95 to 68 weight percent of the ether and about 5 to 32 weight percent 2,3dichloro-1-propene that boil at about 72° to 74° C. at 735 torr;
• and
• (vi) compositions consisting essentially of about 78 to 21 weight percent of the ether and about 22 to 79 weight percent 1-bromopropane that boil at about 62° to 64° C. at 725 torr.
• (vii) compositions consisting essentially of about 94 to 35 weight percent of the ether and about 6 to 65 weight percent methanol that boil at about 52 to 54° C. at 720 torr;
• (viii) compositions consisting essentially of about 94 to 55 weight percent of the ether and about 6 to 45 weight percent ethanol that boil at about 61 to 63° C. at 722 torr.