Hydroquinone and mu-amine compositions

Patent 4289645 Issued on September 15, 1981. Estimated Expiration Date:

July 14, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

2580923

3551349

3552969

3764548

3843547

Composition for accelerating oxygen removal comprised of a mixture of aqueous hydrazine and an aryl amine compound
Patent #: 3983048
Issued on: 09/28/1976
Inventor: Schiessl , et al.

Triethylene tetramine stabilization of cobalt catalyzed sulfite solutions and use thereof in controlling oxygen corrosion in boiler water systems
Patent #: 4019859
Issued on: 04/26/1977
Inventor: Lavin , et al.

High contrast continuous tone developer and process of use
Patent #: 4172728
Issued on: 10/30/1979
Inventor: Sincius , et al.

Methoxypropylamine and hydrazine steam condensate corrosion inhibitor compositions and methods Patent #: 4192844
Issued on: 03/11/1980
Inventor: Trace , et al.

Inventor

Muccitelli, John A.

Assignee

Betz Laboratories, Inc.

Application

No. 06/168989 filed on 07/14/1980

US Classes:

252/178, Deoxidant or free-metal containing252/188.1, REDUCTIVE BLEACHANT, DEOXIDANT, REDUCTANT, OR GENERATIVE252/188.28, Deoxidant or oxygen scavenging252/390, Amine, amide, azo, or nitrogen-base radical containing422/13, Aqueous alkali environment (i.e., pH greater than or equal to 8.4)422/16Using organic nitrogen compound other than ammonium salt

Examiners

Primary: Albrecht, Dennis L.

Attorney, Agent or Firm

International Classes

C02F 1/20 (20060101)
C23F 11/10 (20060101)

Abstract

An improved oxygen scavenger for aqueous mediums is disclosed which comprises hydrazine-free solution of hydroquinone and mu-amine. Representative examples of mu-amines include: aminomethylpropanol, triethylenetetramine, diisopropanolamine, secbutylamine, monoisopropanolamine, ethylenediamine, dimethylaminopropylamine, monoethanolamine, dimethyl(iso)propanolamine, methoxypropylamine, and diethylaminoethanol.