Patent Number: 8,795,620

Title: Systems and methods for recovering nitric acid from pickling solutions

Abstract: An embodiment of a method for recovering nitric acid from acid pickling solution includes introducing a treating material comprising at least one chemical into a pickling solution comprising free nitric acid. The treating material reacts with at least a portion of the free nitric acid in the pickling solution and produces NO.sub.x. A gas stream comprising at least a portion of the NO.sub.x is contacted with ozone, thereby forming oxidation products including nitrogen sesquioxide and nitrogen pentoxide. At least a portion of the nitrogen sesquioxide and nitrogen pentoxide is contacted with water, thereby forming nitric acid, and at least a portion of the nitric acid is collected.

Inventors: Moore; James A. (Beaver, PA)

Assignee: ATI Properties, Inc.

International Classification: C01B 21/40 (20060101); C23G 1/02 (20060101); B01D 53/56 (20060101)

Expiration Date: 8/05/12018