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Machine translation
1. (WO1981000397) NITRIC ACID RECONSTITUTION
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/000397    International Application No.:    PCT/US1980/000554
Publication Date: 19.02.1981 International Filing Date: 09.05.1980
IPC:
C01B 21/40 (2006.01)
Applicants:
Inventors:
Priority Data:
61298 27.07.1979 US
Title (EN) NITRIC ACID RECONSTITUTION
(FR) RECONSTITUTION DE L"ACIDE NITRIQUE
Abstract: front page image
(EN)Process for the reconstitution of NOX gases to nitric acid comprising the steps of 1. contacting the NOX gases in countercurrent relationship in one or more packed columns with cooled 50 to 60 percent nitric acid to remove as nitric acid a major portion of the originally introduced NOX values and provide an acid solution leaving the column having a temperature below about 180 F; 2. compressing the residual gases from step 1 to from about 2 to about 6 atmospheres absolute; and 3. contacting the compressed gases from step 2 with from about 50 to about 60 percent nitric acid in packed absorption column in counter-current relationship to remove substantially all of the remaining NOX values from the gas stream.
(FR)Un procede de reconstitution de gaz NOX en acide nitrique comprend les etapes suivantes: 1) les gaz sont mis au contact, a contre-courant, dans une ou plusieurs colonnes remplies de 50 a 60% d"acide nitrique refroidi pour extraire sous forme d"acide nitrique la plus grande partie des valeurs NOX introduites initialement et obtenir une solution acide sortant de la colonne ayant une temperature inferieure a 180 F environ; 2) les gaz residuels provenant de l"etape (1) sont comprimes entre 2 et 6 atmospheres absolus environ; et 3) les gaz comprimes de l"etape 2 sont mis en contact avec 50 a 60% environ d"acide nitrique dans une colonne d"absorption a contre-courant pour extraire sensiblement toutes les valeurs NOX restantes provenant du courant gazeux.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)