Process for dye removal

Details Process for dye removal Process for dye removal

1996-09-20

1998-05-12

McCarthy, Neil

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210727, 210734, 210917, C02F 156, C02F 170

Patent

active

057500355

ABSTRACT:
A process for dye removal from effluent is disclosed which includes treating the effluent with a reducing agent, adjusting the pH to a selected value in the range of 2-7, treating the effluent with a particular charge neutralization mixture, adjusting the pH a second time and subjecting the mixture to a flocculating process with selected chemicals.

REFERENCES:
patent: 4783265 (1988-11-01), Timmons
patent: 4975203 (1990-12-01), Cook et al.
patent: 5360551 (1994-11-01), Weber
patent: 5611934 (1997-03-01), Shepperd, III et al.
M. Kolb et al, Melliand Testilber 1988, 69 (4), E155.286-7: "The Decolorization of Textile Waste Water by Dithionite".
A. Reife Book Pap. --Int. Conf. Exhib. AATCC 1990, 201-4: "Waste Treatment of Soluble Azo Acid, Direct and Reactive Dyes Using a Sodium Hydrosulfite Reduction Pretreatment Followed by Carbon Adsorption".
D. L. Michelson et al, "Chemical Pretreatment of Concentrated Reactive Dye Discharges Prio9r to Biodegradation", presented at Amer. Chem. Soc. Erg. Techn. for Hazardous Waste Management, Oct. 3, 1991, printed in Emerging Technologies in Hazardous Waste Management III, (Amer. Chem. Soc. 1993).
D. Kupfer, German Offenlegenschrift 2323600, Nov. 21, 1974, Chem. Abstr. 1975, 82: 89847v.
M. Sarvwartari, Senshoku Kenkyu 1980, 24 (4) : 142, Chem. Abstr. 1981, 95: 224973u (Japanese--English Abstract).
R. Tanaka et al, Senj Kako 1976, 28(1) : 14-19, Chem. Abstr. 1976, 85: 112355f (Japanese--English Abstract).
Kirk Othmer, (3rd edition, vol. 2 (1978)), at pages 244ff.
Standard Methods of Water and Wastewater Analysis (18th edition) (edited by A. E. Greenberg, L.S. Clesceri and A.D. Eaton) (American Publich Health Associate, 1992), Color Method 2120 A, pp. 2-1--2-2, Color Method 2120 E, pp. 2-7--2-8 and Procedure 2540 F. from Section 3: "Settleable Solids", p. 2-57.
M. M. Cook et al, "Preprint Extended Abstract", presented before the Division of Environ. Chem. Amer. Chem. Soc., Apr. 5-10, 1992.
K. Vinodgopal et al, Langmuir 1994, 10, "A Photocatalytic Approach for the Reductive Decolorization of Textile Azo Dyes in Colloidal Semiconductor Suspensions", Amer. Chem. Soc. 1994, pp. 1767-1771.
Kirk Othmer, (3rd edition, vol. 24 (1984)) at pages 295ff.
Trade Literature--MetaFloc 137 cationic polyquaternary amine in water May, 1993.

Affiliated with

Also associated with

Rating

Process for dye removal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for dye removal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for dye removal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-976399