Process for treating chromate waste liquid

Details Process for treating chromate waste liquid Process for treating chromate waste liquid

2005-01-25

2005-01-25

Hruskoci, Peter A. (Department: 1724)

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

C210S639000, C210S666000, C210S667000, C210S687000, C210S725000, C210S727000, C210S734000, C210S912000, C210S913000

Reexamination Certificate

active

06846416

ABSTRACT:
The invention relates to a process for treating a chromate waste liquid containing an organic acid component. This process includes (a) adding a chromium precipitation accelerating agent containing at least one of a calcium component and a magnesium component, to the chromate waste liquid; and (b) adjusting the chromate waste liquid to having a first pH of 9 or higher, thereby precipitating a chromium component from the chromate waste liquid and thereby reducing a concentration of a dissolved chromium component of the chromate waste liquid.

REFERENCES:
patent: 3575853 (1971-04-01), Gaughan et al.
patent: 4260491 (1981-04-01), Cassidy et al.
patent: 4338200 (1982-07-01), Zeijlstra
patent: 4419246 (1983-12-01), Jayawant
patent: 4705639 (1987-11-01), Aldrich
patent: 4802993 (1989-02-01), Katoh
patent: 4846978 (1989-07-01), Leggett et al.
patent: 4971775 (1990-11-01), Hoy et al.
patent: 5114592 (1992-05-01), Schuster et al.
patent: 5160631 (1992-11-01), Frost et al.
patent: 5330658 (1994-07-01), Grant et al.
patent: 5908559 (1999-06-01), Kreisler
patent: 5951869 (1999-09-01), Heskett
patent: 6607651 (2003-08-01), Stiller
patent: 196 38 176 (1998-04-01), None
patent: 0 072 885 (1983-03-01), None
patent: 52-68860 (1977-06-01), None
patent: 53-48086 (1978-05-01), None
patent: 55-18229 (1980-02-01), None
patent: 55-50467 (1980-04-01), None
patent: WO 9316961 (1993-09-01), None
Korean Office Action for Korean Patent Application No. 10-2001-0045821 dated Mar. 18, 2004.
European Search Report for EP 01 11 8162 dated Nov. 16, 2001.

Affiliated with

Also associated with

Rating

Process for treating chromate waste liquid 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 treating chromate waste liquid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for treating chromate waste liquid will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3428671