C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/574.7
C07C 47/04 (2006.01) C07C 45/78 (2006.01)
Patent
CA 1093099
ABSTRACT OF THE DISCLOSURE Raw gaseous formaldehyde is purified by passing it through a first series of superimposed fluidized beds of solid adsorbent, maintained at 80° - 140°C, while continuously circulating solid adsorbent from each bed to the underlying bed and discharging from the lowermost bed the spent adsor- bent, delivering the latter to the uppermost bed of a second series of superimposed fluidized beds of solid adsorbent, passing through the latter a stream of inert gas to strip the adsorbed formaldehyde at 130°-150°C, while continuously circulating said spent adsorbent from each bed to the underlying bed and discharging from the lowermost bed the adsorbent thus treated, delivering the latter to the uppermost bed of a third series of fluidized beds of solid adsorbent, and passing through the latter a stream of inert gas to regenerate the adsorbent at 145°- 250°C, while continuously circulating the adsorbent from each bed to the underlying bed, discharging the regenerated adsorbent from the lowermost bed and recycling said rege- nerated adsorbent to the uppermost bed of the first series.
300857
Colombo Paolo
Radici Pierino
Macrae & Co.
Societa' Italiana Resine S.i.r. S.p.a.
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