Process and an apparatus for the preparation of sulfuric acid
CA 1205614 A · Owner: Haldor Topsýe A/S · Inventors: Schoubye, Peter C.S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
For the preparation of sulfuric acid a 240-330°C hot gas steam containing SO3 and H2SO4-vapour in a total amount of up to 10% b.v. and up to 50% b v. of steam the ratio steam/SO3 being at least 1:1 is, passed upwards through a bundle of exteriorly cooled vertical, acid resistant tubes in a heat exchange tower for condensing sulfuric acid. The tubes are cooled with air introduced through an inlet opening in the upper part of the tower and discharged through one or more exit openings in the lower half of the tower. By regulating cooling air velocities and levels from the bottom of the tower of discharging the cooling air the cooling is regulated so as to determine the discharge temperature …
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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 June 10, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 10, 2003.
- 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.