C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
C01B 13/36 (2006.01) B01J 21/04 (2006.01) B01J 21/16 (2006.01) B01J 23/00 (2006.01) C01F 7/00 (2006.01) C01F 7/16 (2006.01) C01G 9/00 (2006.01)
Patent
CA 2437607
This invention relates to a process for the preparation of anionic clay and boehmite-containing compositions, to anionic clay and boehmite-containing compositions and to catalysts comprising such compositions. These compositions may also contain unreacted trivalent metal source and/or divalent metal source. The process involves subjecting a precursor mixture comprising a divalent metal source and a trivalent metal source to at least two aging steps, wherein at least once between two aging steps an aluminium source is added. An advantage of the invention is that the crystallinity of the boehmite in the composition can be tuned.
La présente invention concerne un procédé de préparation de compositions contenant de l'argile anionique et de la boehmite. Ces compositions peuvent également contenir une source de métal trivalent et/ou une source de métal divalent qui n'a pas réagi. Le procédé consiste à soumettre un mélange précurseur, comprenant une source de métal divalent et une source de métal trivalent, à au moins deux étapes de vieillissement, entre lesquelles on ajoute au moins une fois, une source d'aluminium. Cette invention présente un avantage du fait que la cristallinité de la boehmite présente dans la composition peut être régulée.
Jones William
O'connor Paul
Stamires Dennis
Akzo Nobel N.v.
Albemarle Netherlands B.v.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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