Refrigeration – Processes – Fractionally solidifying a constituent and separating the same
Patent
1980-08-22
1982-01-12
Bernstein, Hiram
Refrigeration
Processes
Fractionally solidifying a constituent and separating the same
62544, 422251, B01D 902
Patent
active
043098789
ABSTRACT:
An apparatus and process for purifying and separating a crystalline compound from its impurities in a slurry containing same, said process comprising introducing said slurry under pressure into a cylindrical pressurized filter-washer having a substantially constant inside diameter which is substantially free of protrusions, said filter-washer having a filter means with a screen contiguous with an internal surface of the cylinder, said screen having a smooth surface sufficient to provide minimum friction so as to allow a moving bed of crystals to move past it and withdraw a filtrate without blinding, filtering the crystals, withdrawing the filtrate, and moving the crystal bed past the filter screen, applying a controlled restraining force on the crystal bed so as to prevent relaxation and channeling and over-compacting of said bed by means of a compression and harvest means substantially contiguous with said inside diameter and located between said filter means and an exit means, said compression and harvest means comprising a rotatable plate with cutting edges for removing crystals from said bed and perforations for receiving crystals to be passed through said plate to a melting zone, rotating said plate to pass crystals through said perforations, melting the harvested crystals in said melting zone and withdrawing a portion of said melted crystals as purified product from said exit means located in said melting zone, passing the blance of said melted crystals in a countercurrent manner through the perforations in said compression and harvest means and through the moving crystal bed between said compression and harvest means and said filter means, thereby effecting purification by displacing the liquid medium and impurities from the interstices between the crystals.
REFERENCES:
patent: 2731456 (1956-01-01), Weedman
patent: 2770533 (1956-11-01), Kahmann et al.
patent: 2846292 (1958-08-01), Harper
patent: 3073131 (1963-01-01), Ashley
patent: 3290891 (1966-12-01), Lano et al.
patent: 3872009 (1975-03-01), Thijssen
patent: 4099947 (1978-07-01), Ganiaris
Bernstein Hiram
Koppers Company Inc.
MacKay Donald M.
LandOfFree
Process and apparatus for separating and purifying a crystalline 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 and apparatus for separating and purifying a crystalline, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and apparatus for separating and purifying a crystalline will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1536064