Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Nitrogen or nitrogenous component
Patent
1986-03-10
1987-11-24
Heller, Gregory A.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Nitrogen or nitrogenous component
423239, 423242, 423243, 423244, C01B 2100, C01B 1700, B01J 800
Patent
active
047088540
ABSTRACT:
The present invention relates to a cyclic continuous process and compositon for the removal of NO and SO.sub.2 from a variety of fluid streams. A fluid stream containing NO and SO.sub.2 is contacted with an aqueous solutin of water-soluble organic polymeric chelate containing a polyvalent metal, e.g., Fe (II). The NO is catalytically absorbed and in the presence of SO.sub.2, the imidodisulfonate is formed. Optionally, a reducing agent, such as sodium hydrogen sulfide, is added to maintain the polyvalent metal in the reduced state. The process next includes removal of the imidodisulfonate formed. The separation of water and low molecular weight materials and products, e.g. molecular weight below 500, usually occurs by ultrafiltration or dialysis, with recycle and re-use of the polyvalent metal chelate.
REFERENCES:
patent: 3932585 (1976-01-01), Moriguchi et al.
patent: 3974090 (1976-08-01), Mitchell
patent: 3984522 (1976-10-01), Saito et al.
patent: 3991161 (1976-11-01), Saitoh et al.
patent: 3992508 (1976-11-01), Saitoh et al.
patent: 4044101 (1977-08-01), Hisamatsu et al.
patent: 4055623 (1977-10-01), Saitoh et al.
patent: 4079118 (1978-03-01), Gorai
patent: 4081509 (1978-03-01), Hishinuma et al.
patent: 4087372 (1978-05-01), Saitoh et al.
patent: 4091074 (1978-05-01), Gorai et al.
patent: 4113837 (1978-09-01), Kendall et al.
patent: 4126529 (1978-11-01), DeBerry
patent: 4347227 (1982-08-01), Haas et al.
patent: 4386058 (1983-05-01), Hass
patent: 4423158 (1983-12-01), Porath
patent: 4448899 (1984-05-01), Haas et al.
patent: 4518745 (1985-05-01), Engelhardt et al.
G. Grillot et al., "The Condensation of Diethylamine and Formaldehyde with Phenol, o-, m-, p-Cresols", JACS, vol. 67, pp. 1968-1969 (1945).
P. R. Klinkowski, "Ultrafiltration", Kirk-Othmer: Encyclopedia of Chemical Technology, vol. 23, pp. 439-461 (1983).
E. F. Leonard, "Dialysis", Kirk-Othmer--Encyclopedia of Chemical Technology, vol. 7, pp. 564-579 (1979).
Heller Gregory A.
The Dow Chemical Company
LandOfFree
Process for the removal of NO from fluid streams using a water-s 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 the removal of NO from fluid streams using a water-s, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the removal of NO from fluid streams using a water-s will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2423421