Stabilized chelating agents for removing hydrogen sulfide
CA 1295986 C · Owner: The Dow Chemical Company · Inventors: Bedell, Stephen A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Soluble chemical compounds having a high affinity for hydroxyl radicals are effective stabilizers for chelating agents used in the hydrogen sulfide removal process. The stabilizers include water-soluble aromatic compounds, bromide ions iodide, ions, cyanides, nitrites, amino acids sugars, ascorbates, alcohols, polyols, aliphatic aldehydes soluble organic compounds having unsaturated carboncarbon bonds, dimethyl sulfoxide, organic disulfides alkyl amines, and formates. The aromatic compounds have the additional benefit of combining with hydroxyl radicals to form chelating agents.
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 18, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 18, 2009.
- 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.