Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – With means applying electromagnetic wave energy or...
Reexamination Certificate
2007-01-23
2008-09-02
Griffin, Walter D. (Department: 1797)
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
With means applying electromagnetic wave energy or...
C422S168000, C422S170000, C422S187000, C422S186220, C422S224000, C422S232000, C422S234000, C423S155000, C423S210000, C423S242100
Reexamination Certificate
active
07419643
ABSTRACT:
The present invention provides methods and apparatus for treating flue gas containing sulfur dioxide using a scrubber, and more particularly relates to recovering gypsum and magnesium hydroxide products from the scrubber blowdown. The gypsum and magnesium hydroxide products are created using two separate precipitation reactions. Gypsum is crystallized when magnesium sulfate reacts with calcium chloride. Magnesium hydroxide is precipitated when magnesium chloride from the gypsum crystallization process reacts with calcium hydroxide. The process produces a high quality gypsum with a controllable pH and particle size distribution, as well as high quality magnesium hydroxide.
REFERENCES:
patent: 4867961 (1989-09-01), Palmer
patent: 4874591 (1989-10-01), Jeney
patent: 5084225 (1992-01-01), Ishigaki et al.
patent: 5270026 (1993-12-01), College et al.
patent: 5614158 (1997-03-01), College
patent: 5676915 (1997-10-01), Iiyama et al.
patent: 6214313 (2001-04-01), Berisko et al.
patent: 6572832 (2003-06-01), Smith
patent: 1222524 (1989-09-01), None
Allegheny Energy, Inc.
Eckert Seamans Cherin & Mellott , LLC
Griffin Walter D.
Seifu Lessanework T
Silverman Arnold B.
LandOfFree
Methods and apparatus for recovering gypsum and magnesium... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods and apparatus for recovering gypsum and magnesium..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus for recovering gypsum and magnesium... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3980932