Method for odor control

• US 6,743,421 B2
• Filed: 01/31/2002
• Issued: 06/01/2004
• Est. Priority Date: 01/31/2002
• Status: Expired due to Fees

• Current Assignee: GE Betz, Inc. (General Electric Co. (Italy))
• Original Assignee: GE Betz, Inc. (General Electric Co. (Italy))
• Inventors: Vasconcellos, Stephen R., Robbins, Terry L.
• Primary Examiner(s): Dodson, Shelley A.
• Application Number:
  US10/061,463
• Publication Number:
  US 20030143182A1
• Time in Patent Office: 852 Days
• Field of Search: 424/76.1, 424/76.2, 424/76.21
• US Class Current: 424/76.1
• CPC Class Codes: B01D 53/1493 Selection of liquid materials for use as absorbents
• CPC Class Codes: B01D 53/34 Chemical or biological purification of waste gases

Abstract

The present invention relates to a method of removing organic acid an/or organic amines odors from aqueous systems by treating the aqueous system or the atmosphere adjacent to the aqueous system with a solution of a substantially sulfonate free, anionic kraft pine lignin.

Claims

1. A method of deodorizing a odoriferous aqueous system containing odor causing organic acids and/or amine comprising adding to said system a substantially sulfonate free, anionic kraft pine lignin in an amount sufficient to deodorize said aqueous system.

2. The method of claim 1 wherein said substantially sulfonate free, anionic kraft pine lignin is added to said aqueous system as an aqueous solution.

3. The method of claim 2 wherein said aqueous solution has a substantially sulfonate free, anionic kraft pine lignin concentration of from about 0.1% to about 30%.

4. The method of claim 3 wherein said substantially sulfonate free, anionic kraft pine lignin aqueous solution is added to said aqueous system in a concentration from about 10 ppm to about 500 ppm.

5. The method of claim 2 wherein said substantially sulfonate free, anionic kraft pine lignin aqueous solution has a pH from about pH 8 to about pH 11.

6. The method of claim 1 wherein said substantially sulfonate free, anionic kraft pine lignin is a sodium salt of substantially sulfonate free, anionic kraft pine lignin.

7. The method of claim 1 wherein said substantially sulfonate free, anionic kraft pine lignin has a molecular weight of from about 25,000 to 75,000.

8. A method of deodorizing the odoriferous atmosphere of an aqueous system comprising spraying into said atmosphere an aqueous solution of a substantially sulfonate free, anionic kraft pine lignin.

9. The method of claim 8 wherein said aqueous solution has a substantially sulfonate free, anionic kraft pine lignin concentration of from about 0.1% to about 10%.

10. The method of claim 8 wherein said substantially sulfonate free, anionic kraft pine lignin solution has a pH of from about pH 8 to about pH 11.

11. The method of claim 8 wherein said substantially sulfonate free, anionic kraft pine lignin is a sodium salt of substantially sulfonate free, anionic kraft pine lignin.

12. The method of claim 8 wherein said substantially sulfonate free, anionic kraft pine lignin has a molecular weight of about 25,000 to about 75,000.