Cleaning solution
View Patent ↗Disclosed are cleaning solutions. More particularly, non-toxic solutions of base, water, alcohol and detergent, that effectively and surprisingly eliminate contaminating aliphatic acids in aqueous solutions. When present as a foam or even a contaminating film remaining on various parts and surfaces, aliphatic acid contaminants can be present a large and costly problem in manufacturing operations, cleaning tasks, personal hygiene. The need to remove such contaminants arises in a myriad environments and situations, such as during the manufacture of detergents, pharmaceuticals, consumer products, coring and core analysis, manipulation of oils, fuels, fermentation applications, manufacture of emollients, moisturizers, liquors, foods such as seafood, milk, butter and other dairy products, water processing, paper products, tissue culture, reusable clinical equipment, and the like. Presented are cleaning compositions and methods that effectively eliminate and prevent build up of such dangerous and costly contaminants in aqueous solutions.
1. A non-toxic or environmentally benign cleaning solution consisting of: 1% to 10% (w/v) base; 30% to 70% (w/v) a primary or secondary unsubstituted alcohol; 1% to 10% (w/v) n-dodecyl-N,N-dimethylamine-N-oxide; and water, wherein the solution has a pH of between 8 and 10.2.
2. The cleaning solution according to claim 1 , wherein the base is selected from the group consisting of: ammonium bases, alkali metal bases, and mixtures thereof.
3. The cleaning solution according to claim 1 , wherein the base has a species selected from the group consisting of: phosphate, carbonate, bicarbonate, borate, sodium, potassium, ammonium, and mixtures thereof.
4. The cleaning solution according to claim 1 , wherein the alcohol is selected from the group consisting of: isopropyl alcohol, n-propanol, butanol, and isobutanol.
5. The cleaning solution according to claim 1 , wherein the alcohol is isopropyl alcohol and the base is tris.
6. The cleaning solution according to claim 1 , wherein the percent alcohol present in the cleaning solution is between about 30% and 40% (w/v).
7. The cleaning solution according to claim 1 , wherein the percent base present in the cleaning solution is between about 3% and 5% (w/v).
8. A method of eliminating or otherwise removing an aliphatic acid from an aliphatic acid-contaminated solution, which comprises adding the cleaning solution according to claim 1 to the aliphatic acid-contaminated solution.
9. The method according to claim 8 , wherein the base is selected from the group consisting of: ammonium bases, alkali metal bases, and mixtures thereof.
10. The method according to claim 8 , wherein the base has a species selected from the group consisting of: phosphate, carbonate, bicarbonate, borate, sodium, potassium, ammonium, and mixtures thereof.
11. The method according to claim 8 , wherein the alcohol is isopropyl alcohol or n-propanol.
12. The method according to claim 8 , wherein the alcohol is isopropyl alcohol and the base is tris.
13. The method according to claim 8 , wherein the percent alcohol present in the cleaning solution is between about 30% and 40% (w/v).
14. The method according to claim 8 , wherein the percent base present in the cleaning solution is between about 3% and 5% (w/v).
15. A method of eliminating an aliphatic acid contaminant, which comprises: providing a surface or aqueous solution which is contaminated with an aliphatic acid; and contacting the surface with, or adding to the aqueous solution, the cleaning solution according to claim 1 .
16. The method according to claim 15 , which further comprises: providing a second solution; adding an amount of the cleaning solution to the second solution; and contacting the surface with, or adding to the aqueous solution, the second solution.
17. The method according to claim 16 , wherein the amount of the cleaning solution added to the second solution is determined empirically to achieve optimum elimination of the aliphatic contaminant.
18. The method according to claim 15 , wherein the alcohol is isopropyl alcohol or n-propanol.
19. The method according to claim 16 , wherein the alcohol is isopropyl alcohol and the base is tris.
20. The method according to claim 16 , wherein the percent alcohol present in the cleaning solution is between about 30% and 40% (w/v).
21. The method according to claim 16 , wherein the percent base present in the cleaning solution is between about 3% and 5% (w/v).
22. A non-toxic or environmentally benign cleaning composition consisting of: 1% to 4% (w/v) alkali metal base; 30% to 35% (w/v) primary or secondary unsubstituted alcohol of a length between C 1 and C 8 ; 1% to 5% (w/v) n-dodecyl-N,N-dimethylamine-N-oxide; and water.
23. The cleaning composition according to claim 22 , wherein the base is tris and the alcohol is isopropyl alcohol or n-propanol.
24. The cleaning composition according to claim 22 , wherein the composition has a pH of between 8 and 10.2.
25. A non-toxic or environmentally benign cleaning composition consisting of: 1% to 10% (w/v) base; 30% to 70% (w/v) primary or secondary unsubstituted alcohol of a length between C 1 and C 8 ; 1% to 10% (w/v) n-dodecyl-N,N-dimethylamine-N-oxide; water; and at least one of glycerol, a preservative, a perfume and a fragrance.