Physical solvent for gas sweetening
CA 1233014 A · Owner: National Tank Company · Inventors: Ferrin, Charles R.; Manning, William P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a novel solvent N-2-methoxy-, ethyl-2-pyrrolidone, that can be used in two ways. First in the, pure or undiluted form, it absorbs hydrogen sulfide and other sulfurous gases selectively and simultaneously dries the gas. Second when mixed with an alkanolamine and water it is a supe-, rior absorbent of mercaptans sulfides, and disulfides, and re-, moves acid gases. The chemical structure of N-2-methoxyethyl-2pyrrolidone is shown below. N-Methoxyethyl-2-Pyrrolidone
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted February 23, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 23, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.