Dewatering
CA 1317191 C · Owner: Keeney, Mark · Inventors: Keeney, Mark
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 method of improving the dewatering of alumina trihydrate obtained by the Bayer process. The method comprises treating the alumina trihydrate with the product of mixing an alkaline liquor and a C8 to C20 fatty acid, fatty acid precursor such as an ester or amide, or a fatty acid blend. The product a fatty, acid salt, is an effective dewatering aid. The alumina trihydrate may be washed with a liquor including said product, or the product may be added to a sayer liquor slurry prior to filtration of the alumina trihydrate. The invention also contemplates a dewatering aid consisting of the product of mixing an alkaline liquor with a C8 to C20 fatty acid or fatty acid …
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 May 4, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 4, 2010.
- 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.