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:
Jun. 04, 1996
Filed:
Nov. 05, 1993
M Linda Lin, Naperville, IL (US);
Nalco Fuel Tech, Naperville, IL (US);
Abstract
A method for removing carbonyl sulfide from fluids, particularly gases, involves contacting them with alkaline aqueous solutions containing peroxide and hindered amine. The sulfur products so formed can then be separated from the fluid. In one embodiment, gas containing carbonyl sulfide is cycled through a wet scrubber containing a solution of hydrogen peroxide and methyldiethanolamine, triethylamine, dimethylmonoethanolamine, diethylmonoethanolamine, triethanolamine, 2-amino-2-meth-yl-1-propanol, and/or 1,8-p-menthanediaminemethyldiethanolamine at a pH of about 9 to 11, e.g., about 10. Methyldiethanolamine is preferred in one embodiment. A dispersant such as a water-soluble polymer having a molecular weight of about 500 to 100,000 may optionally be employed in the solution. Abatement of greater than 90% of the carbonyl sulfide is achieved in preferred embodiments.