Back to results
US 7,678,182 B2Granted
Material and process for the filtration of nitric acid and NO2 from streams of air
AssigneeGuild Associates, Inc.
InventorsWilliam B. Feaver, Joseph A. Rossin
Life of this patent
Estimating the term…
Abstract
A material for filtering NO2 and nitric acid vapors from air over a wide range of humidities and temperatures including a porous hydrophobic substrate and an amine is provided.
Claims22
A material for filtering NO2 and nitric acid vapors from air over wide range of humidities and temperatures, comprising:
- a porous hydrophobic substrate comprising predominantly of an acidified form of a zeolite from the pentacil family;
- and
- an amine.
A material for filtering NO2 and nitric acid vapors from air over wide range of humidities and temperatures, comprising:
- a porous hydrophobic substrate;
- and
- an amine comprising at least one R—NHCH3 functional group.
A material for filtering NO2 and nitric acid vapors from air over wide range of humidities and temperatures, comprising:
- a porous hydrophobic substrate;
- and
- an amine comprising an amine salt.
Dependencies are inferred from the claim text.