Method and composition for utilizing lime-urea hydrates to simultaneously reduce NO_x and SO_x in combustion effluents

Patent 4731233 Issued on March 15, 1988. Estimated Expiration Date:

January 9, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

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Inventors

Application

No. 06/817319 filed on 01/09/1986

US Classes:

423/239.1, Utilizing solid sorbent, catalyst, or reactant423/242.7, Amine423/243.08Alkali or alkali earth compound reactant

Examiners

Primary: Heller, Gregory A.
Assistant: Freeman, Lori S.

Attorney, Agent or Firm

Rowland; Bertram I.

International Class

B01D 53/60 (20060101)

Abstract

Methods and compositions are provided for simultaneous reduction of NOx and SOx in combustion effluents and process gas streams, employing a sorbent material of calcium or dolomitic lime hydrated with aqueous carboxamides, optionally with carbinol reductants, in amounts sufficient to reduce the NOx and SOx concentrations from the effluents. The sorbent material may be introduced as dry powders or wet hydrates in effluent streams at temperatures ranging from 400° to 2400° F.