Process for making, and use of, anionic clay materials
AssigneeBulldog Technologies U.S.A., Inc.
InventorAlbert A. Vierheilig
Life of this patent
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Abstract
Anionic clay compounds such as hydrotalcite-like compounds can be made by a process wherein a non-hydrotalcite-like compound (or a hydrotalcite-like compound) are heat treated and then hydrated to form hydrotalcite-like compounds having properties (e.g., increased hardness and/or density) that differ from those of hydrotalcite-like compounds made by prior art methods wherein non-hydrotalcite-like compounds (or hydrotalcite-like compounds) are not similarly heat treated and hydrated to form such hydrotalcite-like compounds.
Claims18
A process for making an anionic clay compound, said process comprising:
- (1) preparing a reaction mixture comprising a divalent metal-containing compound and a trivalent metal-containing compound under conditions such that a product obtained from the reaction mixture is a non-anionic clay compound;
- (2) heat treating the non-anionic clay compound to create a heat treated, non-anionic clay compound;
- and
- (3) hydrating the heat treated, non-anionic clay compound to obtain an anionic clay compound.
A process for making an anionic clay compound-based SO.sub.x sorbent, said process comprising:
- (1) preparing a reaction mixture comprising a divalent metal-containing compound, a trivalent metal-containing compound, a cerium-containing compound and a vanadium-containing compound under conditions such that a product obtained from the reaction mixture is a non-anionic clay compound/cerium-containing compound/vanadium-containing compound mixture;
- (2) converting the non-anionic clay compound/cerium-containing compound/vanadium-containing compound mixture into a microspheroidal form suitable for use as a SO.sub.x sorbent;
- (3) heat treating the non-anionic clay compound/cerium-containing compound/vanadium-containing compound mixture at 300.degree. C. to 850.degree. C. to obtain a collapsed, heat treated, non-anionic clay compound/cerium containing compound/vanadium containing compound mixture;
- (4) hydrating the collapsed, heat treated, non-anionic clay compound/cerium-containing compound/vanadium-containing compound mixture to obtain an anionic clay compound/cerium-containing compound/vanadium-containing compound material suitable for use as a SO.sub.x sorbent.
A process for making a hydrotalcite-like compound, said process comprising:
- (1) preparing a reaction mixture comprising an aluminum-containing compound and a magnesium-containing compound under conditions such that a product obtained from the reaction mixture is a non-hydrotalcite-like compound;
- (2) heat treating the non-hydrotalcite-like compound to create a heat treated, non-hydrotalcite-like compound;
- and
- (3) hydrating the heat treated, non-hydrotalcite-like compound to obtain a hydrotalcite-like compound.
A process for making a hydrotalcite-like compound-based SO.sub.x sorbent, said process comprising:
- (1) preparing a reaction mixture comprising an aluminum-containing compound, a magnesium-containing compound, a cerium-containing compound and a vanadium-containing compound under conditions such that a product obtained from the reaction mixture is a non-hydrotalcite-like compound/ceria-containing compound/vanadium-containing compound mixture;
- (2) converting the non-hydrotalcite-like compound/ceria-containing compound/vanadium-containing compound mixture into a microspheroidal form suitable for use as a SO.sub.x sorbent;
- (3) heat treating the non-hydrotalcite-like compound/cerium-containing compound/vanadium-containing compound mixture at 300.degree. C. to 850.degree. C. to obtain a collapsed heat treated, non-hydrotalcite-like compound/cerium-containing compound/vanadium-containing compound mixture;
- (4) hydrating the collapsed heat treated, non-hydrotalcite-like compound/ceria-containing compound/vanadium-containing compound mixture to obtain a hydrotalcite-like compound/cerium-containing compound/vanadium-containing compound material suitable for use as a SO.sub.x sorbent.
Dependencies are inferred from the claim text.