METHODS FOR THE ON-SITE PRODUCTION OF CHLORAMINE AND USES THEREOF

• US 20120021062A1
• Filed: 09/30/2011
• Published: 01/26/2012
• Est. Priority Date: 12/29/2006
• Status: Active Grant

• Current Assignee: Ecolab USA Incorporated (Ecolab, Inc.)
• Original Assignee: Nalco Company LLC (Ecolab, Inc.)
• Inventors: Gupta, Amit, Elliott, Randall, Rice, Laura E., Lu, Yu-Mei, Tu, Wen Li
• Granted Patent: US 9,388,044 B2
• Time in Patent Office: Days
• US Class Current: 424/600
• CPC Class Codes: C01B 21/091 Chloramine, i.e. NH2Cl or dichloramine, i.e. NHCl2
• CPC Class Codes: C02F 1/50 by addition or application of a germicide or by oligodynamic treatment C02F1/4606, C02F1/467, C02F1/76 take precedence
• CPC Class Codes: C02F 1/766 by means of halogens other than chlorine or of halogenated compounds containing halogen other than chlorine
• CPC Class Codes: C02F 2209/06 pH
• CPC Class Codes: C02F 2209/29 Chlorine compounds
• CPC Class Codes: C02F 2303/04 Disinfection
• CPC Class Codes: C02F 2303/20 Prevention of biofouling
• CPC Class Codes: Y02W 10/37 using solar energy

Abstract

A method of producing stable disinfectant for use as a biocidal composition. The method comprises: A) providing reagents, B) asynchronously feeding the at least two of the reagents into a wide space, and C) allowing all the reagents to conic into contact and mix with each other. The reagents comprise: a) an amine source of disinfectant in concentrated form, b) an oxidizing halogen compound in concentrated form, and c) a diluent. The use of asynchronous feeding and a wide space results in a dynamic biocide regimen. This regimen results in a changing environment that infestations have difficulty adapting to. This method also imparts superior results due to the avoidance of channeling effects which would otherwise weaken the effects of the biocide.

Claims

1. A method of producing stable disinfectant for use as a biocidal composition, the method comprising:

providing reagents, the reagents comprising;

a) an amine source of disinfectant in concentrated form,

b) an oxidizing halogen compound in concentrated form, and

c) a diluent

asynchronously feeding the at least two of the reagents into a wide space, and allowing all three of the reagents to come into contact and mix with each other.

2. The method of claim 1 wherein the amine source is chloramine.

3. The method of claim 1 wherein the diluent comprises enough caustic to reduce the pH of the combination of reagents to no more than 12.5.

4. The method of claim 1 wherein the concentration of the disinfectant in concentrated form is in the range from 5%-80% and after it is mixed with the diluent it drops to 0.01%-5%.

5. The method of claim 1 wherein the concentration of the oxidizing halogen compound in concentrated form is within the range of 3%-18% and after it is mixed with the diluent it drops to 0.01%-3%.

6. The method of claim 1 wherein the molar ratio of chloramine to oxidizing halogen is within the range of 0.1:

1 to 10;

1.

7. The method of claim 1 wherein the oxidizing halogen is a chlorine source.

8. The method of claim 1 wherein the oxidizing halogen is sodium hypochlorite.

9. The method of claim 1 wherein the disinfectant is produced according to a batch process.

10. The method of claim 1 wherein the disinfectant is produced according to a continuous dose process.

11. The method of claim 1 wherein the disinfectant is produced according to a slug dose process.