Back to results
US 11,298,681 B2Granted
Urea-impregnated zeolite sorbents and method for making the same
Assignee3M Innovative Properties Company
InventorsHimanshu Jasuja, Michael S. Wendland, Michael W. Kobe
Life of this patent
Estimating the term…
Abstract
A sorbent suitable for sorbing aldehydes includes acidified zeolite impregnated with a urea-based compound, the acidified zeolite having a pore opening of 5 Å or greater and a molar ratio of silicate to aluminate of at least 1.1:1. The sorbent may be prepared by impregnating acidified zeolite with a solution of a urea-based compound, where the acidified zeolite includes proton counterions. The sorbent may be supported on a filter support to provide an air filter.
Claims15
A sorbent comprising:
- acidified zeolite impregnated with a urea-based compound, the acidified zeolite having a pore opening of 5 Å or greater and a molar ratio of SiO2 to Al2O3 of at least 1.1:1.
A method for making a sorbent, the method comprising:
- impregnating acidified zeolite with a solution of a urea-based compound, the acidified zeolite comprising proton counterions and having a pore opening of 5 Å or greater and a molar ratio of SiO2 to Al2O3 of at least 1.1:1.
Dependencies are inferred from the claim text.