EP 0032912 A4 19820111 - NITRIC ACID RECONSTITUTION.
Title (en)
NITRIC ACID RECONSTITUTION.
Title (de)
REKONSTITUTION VON SALPETRSÄURE.
Title (fr)
RECONSTITUTION DE L'ACIDE NITRIQUE.
Publication
Application
Priority
US 6129879 A 19790727
Abstract (en)
[origin: WO8100397A1] Process for the reconstitution of NO<uX>u gases to nitric acid comprising the steps of 1. contacting the NO<uX>u 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 NO<uX>u 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 NO<uX>u values from the gas stream.
IPC 1-7
IPC 8 full level
C01B 21/40 (2006.01); C01B 21/42 (2006.01); C01F 7/24 (2006.01)
CPC (source: EP)
C01B 21/40 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 8100397 A1 19810219; AR 220854 A1 19801128; CA 1154232 A 19830927; EP 0032912 A1 19810805; EP 0032912 A4 19820111; JP S56500929 A 19810709; ZA 804111 B 19810729
DOCDB simple family (application)
US 8000554 W 19800509; AR 28192080 A 19800725; CA 355766 A 19800709; EP 80901345 A 19810224; JP 50165580 A 19800509; ZA 804111 A 19800708