Spill control composition and use thereof

• US 4,174,292 A
• Filed: 03/20/1978
• Issued: 11/13/1979
• Est. Priority Date: 03/20/1978
• Status: Expired due to Term

• Current Assignee: Mallinckrodt Baker Incorporated (Avantor, Inc.)
• Original Assignee: J T Baker Chemical Company
• Inventors: Michelotti, Francis W., Seidenberger, James W.
• Primary Examiner(s): Padgett, Benjamin R.
• Assistant Examiner(s): Gluck, Irwin
• Application Number:
  US05/888,230
• Time in Patent Office: 603 Days
• Field of Search: 252/189, 252/192, 252/259.5, 252/88, 252/426, 252/438, 252/443, 34/DIG. 1, 210/59, 210/DIG. 1
• US Class Current: 510/100
• CPC Class Codes: C11D 3/30 Amines; Substituted amines ; Quaternized amines
• CPC Class Codes: C11D 3/3723 Polyamines or polyalkyleneimines
• CPC Class Codes: C11D 3/40 Dyes ; Pigments

Abstract

A spill of acid is controlled and cleaned up by being neutralized by a low metal ion fluid neutralizer composition formed of a non-volatile organic amine compound, a foam-forming surfactant and a pH indicator dye and which can additionally contain water, a dissolved gas and color tinting agents. Such a neutralizer composition is especially useful in the electronics manufacturing industry and in clean rooms where the presence of metal ions would be deleterious.

Claims

1. A composition useful for the control and cleanup of mineral acid spills comprising:

about 55 to 99% by weight of a non-volatile organic amine component selected from the group consisting of a water soluble polyethylineimine polymer or an alkanolamine;

from about 0 to 45% by weight water, from about 0.01 to 2% by weight pH indicator changing color in the range pH 4.0 to 10.0, from about 0 to 10% by weight dissolved gas, from about 0.2 to 3% by weight of a surfactant which is foam-forming under acidic or neutral conditions and from about 0 to 1% by weight of a color tinting agent.

2. The composition of claim 1 wherein the composition contains less than about 0.08% by weight of deleterious metal or metal ion contaminants.

3. The composition of claim 2 wherein the amine component is a polyethyleneimine polymer, the surfactant is a sodium salt of an ethoxylated and sulfated lauryl alcohol, the dissolved gas is carbon dioxide and the pH indicator is bromothymol blue.

4. The composition of claim 3 having the following components and in the specified amounts:

space="preserve" listing-type="tabular">______________________________________ Component amount - % by weight ______________________________________ polyethyleneimine polymer 55.30 sodium salt of an ethoxylated and sulfated lauryl alcohol 0.20 carbon dioxide 4.68 bromothymol blue, Na.sup.+ 0.02 water 39.80 ______________________________________

5. A method for the control and cleanup of spilled mineral acid comprising contacting said spilled mineral acid with a composition of claim 1 and disposing of the resulting slurry after the change in color of the pH indicator in the slurry evidences that the slurry has reached an essentially safe pH condition.

6. A method for the control and cleanup of spilled mineral acid comprising contacting said spilled mineral acid with a composition of claim 4 and disposing of the resulting slurry after the change in color of the pH indicator evidences that the slurry has reached an essentially safe pH condition.