Accession Number:

AD0662815

Title:

A Method for Obtaining Nitric Acid

Descriptive Note:

Technical Report

Corporate Author:

Foreign Technology Division Air Force Systems Command Andrews AFB United States

Report Date:

1967-07-21

Pagination or Media Count:

7.0

Abstract:

The invention concerns the industrial production of nitric acid of increased concentration. By using the method, it is possible to increase the concentration of acid to 70-74 without using additional nitric oxides, resulting in conversion of a maximum amount of the oxide of nitrous gases to acid. In this method the process of acid formation under conditions of condensation of water vapors takes place in a refrigerator-condenser at a pressure of 5 atm. Unreacted nitric oxides are absorbed by nitric acid at temperatures no higher than -5 deg C in absorption column, with subsequent bleaching. The obtained 58-62- nitric acid is strengthened to 70-74 in the absorption part of the bleaching column at a temperature of 25-45 deg C by concentrated gases in the lower part of the bleaching column.

Subject Categories:

  • Industrial Chemistry and Chemical Processing

Distribution Statement:

APPROVED FOR PUBLIC RELEASE