Process for the production of ethanol
CA 1252057 A · Owner: Alfa-Laval Ab · Inventors: Granstedt, Jurgen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the production of ethanol by continuous fermentation in a fermentor with continuous stillage recirculation to the fermentor the fermentation liquid, continuously being withdrawn from the fermentor is first strained in a straining step for separation of coarse solid particles. Then the fermentation liquid is separated in a yeast separation step from which a, yeast stream is recirculated to the fermentor and a yeast-free stream is fed to a primary distillation step. From the bottom stream from the distillation step a portion is recirculated to the fermentor and another portion is subjected to final stripping in a secondary distillation step. By installing a further centrifugal separation …
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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 April 4, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 4, 2006.
- 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.