Process and plant for production of carbon monoxide and hydrogen
CA 2262182 A1 · Owner: L'Air Liquide Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'Etude Et L'Exploitation Des Procedes Georges Claude · Inventors: Gallarda, Jean; Wegrzyn, Franck
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the process of the invention, carbon monoxide is produced by partial condensation in a heat exchanger (310) from a condensed fraction (322) recovered at the base of a separator pot (320). Impure hydrogen (321) is produced at the head of pot (320) and purified by washing with nitrogen in a column (350). An ammonia synthesis mixture is produced from the hydrogen flow (353) collected at the head of the said column. Carbon monoxide is furthermore produced from a fraction (351) collected at the base of the nitrogen-washing column (350). All the columns and the exchanger are in a single cold box (400).
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
- Filed February 18, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 18, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 18, 2021.
- 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.