Patent ID: 6641638
Filing Date: 2003-11-04
Classification: B01D,C01D,C05C

Abstract:
A process for converting vapor streams containing at least one oxide of nitrogen therein to a liquid fertilizer composition comprising the steps of:contacting the vapor stream with water to form an oxy acid(s) of nitrogen mixture from the at least one oxide of nitrogen, exposing the oxy acid(s) of nitrogen mixture to hydrogen peroxide to convert at least some of any oxy acids of nitrogen other than in the nitrate form present to a nitrate ion, sampling the oxy acid(s) of nitrogen mixture with hydrogen peroxide to determine a relative amount of hydrogen peroxide; adding hydrogen peroxide to the oxy acid(s) of nitrogen mixture when sampling determines there is less than a predetermined excess of hydrogen peroxide, and adding a hydroxide solution to the oxy acid(s) of nitrogen mixture to form a nitrate solution.