Clean room wipes for neutralizing caustic chemicals
AssigneeEKC Technology, Inc.
InventorsDanny L. Wallis, Robert J. Small
Life of this patent
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Abstract
Clean room wipe products, methods of preparing them, and methods of using them are described. The clean room wipes are intended for use in cleaning up alkaline contaminants in clean room environments. The wipes contain impregnated acidic solutions, e.g., solutions of organic acids and optionally solvents, which are intended to reduce or eliminate the possibility of spontaneous combustion of the contaminated wipes, that is, when the wipes are used to contain spills of alkaline products such as hydroxylamine-based products and other caustic based formulations.
Claims52
An acid-impregnated wipe comprising:
- an absorbent substrate selected from the group consisting of knitted, woven, and nonwoven fabrics and is adapted for use in removing alkaline contaminants from a clean room environment;
- an organic acid;
- and
- an organic acid crystallization inhibitor,
- wherein the organic acid and organic acid crystallization inhibitor form a liquid at room conditions and wherein the acid-impregnated wipe has an absorbent capacity.
An acid-impregnated wipe comprising:
- an absorbent wipe selected from the group consisting of knitted, woven, and nonwoven fabrics, wherein the absorbent substrate has a first absorbent capacity;
- a first organic acid;
- a first solvent;
- and
- an organic acid crystallization inhibitor, wherein said acid-impregnated wipe has a remaining absorbent capacity which is less than the first absorbent capacity, the wipe is adapted for use in removing alkaline contaminant composition from a clean room environment, and wherein the organic acid, solvent, and the crystallization inhibitor form a liquid composition at room conditions.
An acid-impregnated clean room wipe comprising:
- means to absorb a liquid caustic, said means to absorb a liquid caustic being adapted for use in a clean room environment and having a first absorbent capacity;
- means to neutralize an absorbed caustic liquid composition, said means to neutralize an absorbed caustic being absorbed in the means to absorb a liquid caustic;
- and
- means to inhibit crystallization of the means to neutralize an absorbed caustic liquid composition, wherein said clean room wipe containing said means to neutralize an absorbed caustic liquid composition and said means to inhibit crystallization has a remaining absorbent capacity which is less than the first absorbent capacity and is adapted to absorb and at least partially neutralize the absorbed caustic liquid composition, and wherein the means to neutralize an absorbed caustic liquid composition and the means to inhibit crystallization of the means to neutralize an absorbed caustic liquid composition form a liquid composition at room conditions.
An acid-impregnated wipe comprising:
- an absorbent wipe with low metals content and having particle emission during use being acceptable for use in a clean room and is adapted for use in removing an alkaline contaminant composition from a clean room environment, wherein the wipe has an absorbent capacity;
- a neutralizing composition absorbed in the wipe, the neutralizing composition being a liquid having at least one organic acid and a solvent such that the normality of the organic acid in the neutralizing composition is between about 3.1 and 9.2, and wherein the neutralizing composition is present in an amount between about 10 percent to about 80 percent of the absorbent capacity of the wipe such that the acid-impregnated wipe is operable to absorb the alkaline contaminant composition.
Dependencies are inferred from the claim text.