Process for decoating a washcoat catalyst substrate

Details Process for decoating a washcoat catalyst substrate Process for decoating a washcoat catalyst substrate

2005-08-16

2005-08-16

Barr, Michael (Department: 1746)

Cleaning and liquid contact with solids

Processes

Including application of electrical radiant or wave energy...

C134S028000, C134S029000, C502S022000, C502S025000, C502S027000, C502S028000

Reexamination Certificate

active

06929701

ABSTRACT:
The invention relates to a process for decoating a used washcoat carrier substrate to produce a clean, inert carrier or substrate. In a preferred embodiment, a process according to the invention includes treating a washcoat catalyst substrate in an aqueous solution including an emulsifier. The substrate is also subject to ultrasonic treatment, while treating the substrate in an aqueous solution preferably including a dispersant. The substrate is ultimately rinsed, for example in deionized water. During treatment with the emulsifier, the solution can be agitated, for example by air injection. Likewise, during the ultrasonic treatment the solution can be agitated mechanically. Optional embodiments include the addition of an alkali to the emulsifier solution; rinsing between steps, for example with DI water; treatment with acid to remove sodium before final rinsing, final rinsing in a cascade system, and drying.

REFERENCES:
patent: 4210628 (1980-07-01), Ninomiya et al.
patent: 4548911 (1985-10-01), D'Aniello et al.
patent: 4572903 (1986-02-01), Hino et al.
patent: 4729975 (1988-03-01), Kobayashi
patent: 4992614 (1991-02-01), Rodewald
patent: 5308810 (1994-05-01), Voss et al.
patent: 5689798 (1997-11-01), Oeste
patent: 5741748 (1998-04-01), Allen et al.
patent: 5817701 (1998-10-01), Leviness et al.
patent: 5844005 (1998-12-01), Bauman et al.
patent: 5877107 (1999-03-01), Zahn et al.
patent: 5882422 (1999-03-01), Obayashi et al.
patent: 6025292 (2000-02-01), Obayashi et al.
patent: 6232254 (2001-05-01), Schneider et al.
patent: 6241826 (2001-06-01), Dittmer et al.
patent: 6395665 (2002-05-01), Nojima et al.
patent: 38 16 600 (1989-11-01), None
patent: 0 136 966 (1989-01-01), None
patent: 0 353 467 (1990-02-01), None
patent: 0 499 351 (1992-08-01), None
patent: 0 824 973 (1998-02-01), None
patent: 2.123.917 (1972-09-01), None

Affiliated with

Also associated with

Rating

Process for decoating a washcoat catalyst substrate 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 decoating a washcoat catalyst substrate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for decoating a washcoat catalyst substrate will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3518317