Budapesti Muszaki Egyetem

Csepel Muvek Hiradastechnikai Gepgyara

Gyorgy Palmai

Karoly Szasz

Ferenc Szommer

Gabor Patonay

Zsofia Vajta

Karoly Olah

Gabor Klopp

Jozsef Suto

Imre Szebenyi

Gabor Winkler

Miklos Machacs

The invention is regeneration and recirculation of nitrogen oxides in the exhaust gas of a nitric acid plant without using any material current and heat energy other than that generated in the process of producing nitric acid. Nitrogen oxide is recovered by at least two adsorbers each containing an acid resistant zeolite molecular sieve and operating in an alternate heat cycle; adsorption occurring at 20-40 degrees C. and regeneration at 300-350 degrees C. The hot gas exiting from the oxidation unit used in the production of nitric acid is used to regenerate the adsorbers and the nitrogen oxides set free during the said regeneration are introduced into the main feed stream of the nitric acid plant. In the final stage of the regeneration the adsorbers are cooled by rinsing them with exhaust gas or air at a temperature of 20-40 degrees C.

Process for the recirculation of nitrogen oxides

A gas producing electrolytic cell for portable devices comprising a vessel, an electrolyte, a cap, a gas space, channel labyrinths, a separating wall and contacts. The channel labyrinths eliminate the outflow of the electrolyte from the cell in its overturned position, tender the return of electrolyte to the vessel, to the original level possible. The contacts can be inundated by the electrolyte and in this way an outer electric circuit can be closed for cutting out the stream of electrolyse and for signalizating the overturned position of the cell.

Gas producing electrolytic cell for portable devices

Growing community of inventors

Budapest, Hungary

Gyorgy Palmai