The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 14, 1979
Filed:
Jan. 30, 1978
Applicant:
Inventor:
Joseph G Selmeczi, Pittsburgh, PA (US);
Assignee:
Dravo Corporation, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423242 ;
Abstract
A method for scrubbing sulfur dioxide from gaseous streams using a calcium salt-containing aqueous liquor having 250-5000 parts per million of magnesium ion to enable fast and efficient return to operation following a period of interruption of the gaseous flow by adjusting the pH of the liquor to a value between 9.8 and 12.0 during said interruption to convert sulfite ion species in the liquor to solid magnesium hydroxide and prevent oxidation thereof, and adding magnesium-containing lime to the liquor after resumption of the scrubbing process when the pH of the inlet liquor has dropped below 9.8 to the previous operational mode.