Method of corrosion prevention

Details Method of corrosion prevention Method of corrosion prevention

2010-08-03

2011-11-15

Monaharan, Virginia (Department: 1771)

Distillation: apparatus

Apparatus

Elements

C106S014120, C106S014210, C159SDIG015, C159SDIG020, C159SDIG021, C203S007000, C203S051000, C203S086000, C252S389200, C568S913000, C034S427000

Reexamination Certificate

active

08057642

ABSTRACT:
This invention relates to a process for reducing the corrosion rate of iron-containing vessels within an ethylene glycol distillation system. The inventive process includes the addition of an additive component of sodium nitrite and sodium hypophosphite into such iron-containing vessels, to thereby react with iron of the inside walls and form a protective coating thereon. This process reduces the corrosion rate in iron-containing vessels of the apparatus, and reduces the catalytic effects of iron corrosion products within the system. Thus, not only is the on-stream time of the vessels extended, but also product quality is improved by reducing the aldehyde content of the final ethylene glycol product.

REFERENCES:
patent: 4623399 (1986-11-01), Frenier
patent: 5294371 (1994-03-01), Clubley et al.
patent: 5753316 (1998-05-01), Brent et al.
patent: 5788857 (1998-08-01), Yang et al.
patent: 6066232 (2000-05-01), Mohr et al.
patent: 6133489 (2000-10-01), Mohr et al.
patent: 6770222 (2004-08-01), Ukita et al.
patent: 2006-36449 (2006-02-01), None

Affiliated with

Also associated with

Rating

Method of corrosion prevention does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of corrosion prevention, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of corrosion prevention will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4285954