Processes for the preparation of concentrated nitric acid

Details Processes for the preparation of concentrated nitric acid Processes for the preparation of concentrated nitric acid

1975-12-09

1977-04-19

Peters, G. O.

Chemistry of inorganic compounds

Nitrogen or compound thereof

Oxygen containing

423392, C01B 2140

Patent

active

040188736

ABSTRACT:
Nitric acid having a concentration of at least 98 wt.% is prepared by recovering in liquid state nitrogen peroxide from a gaseous flow containing the same, by absorption in nitric acid, heating of the resulting solution and liquefaction of the gaseous peroxide evolved, followed by a first chemical absorption of a fraction of the liquid peroxide with nitric acid at 70-80% and air and distillation of the resulting concentrated nitric acid. The gaseous products discharged from said first absorption and comprising unreacted peroxide and air are contacted with nitric acid and water in a second chemical absorption stage, thereby to produce the nitric acid used in the first absorption. The remaining fraction of liquid peroxide is delivered to the distillation column, discharged at the top thereof and recycled to the liquefaction stage, while nitric acid is extracted at the bottom of the distillation column and recycled to the second absorption stage.

REFERENCES:
patent: 3634031 (1972-01-01), Hellmer
patent: 3676065 (1972-07-01), Oberste-Berghaus
patent: 3876752 (1975-04-01), Wendel

Affiliated with

Also associated with

Rating

Processes for the preparation of concentrated nitric acid does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Processes for the preparation of concentrated nitric acid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Processes for the preparation of concentrated nitric acid will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-103659