Patent ID: 6905550
Filing Date: 2005-06-14
Classification: C03C,C09D,C11D

Abstract:
1. A method of removing water-insoluble organic material from an norganic surface coated with the water-insoluble organic material in pharmaceutical manufacturing equipment, the method comprising the following steps in sequence: (a) contacting said inorganic surface in pharmaceutical processing equipment with an aqueous solution containing about 4.5 to about 15% by weight of hydrogen peroxide and a hydroxide in an amount so as to obtain a pH of above 7; (b) agitating said aqueous solution onto said surface until said organic material is loosened from the inorganic surface at a temperature of from about 40 to about 100° C., forming organic residue in said aqueous solution; and (c) rinsing away the organic residue; wherein the organic material includes a water insoluble cycloketone.