CA2596421A1 - Process for making and use of anionic clay materials - Google Patents
Process for making and use of anionic clay materials Download PDFInfo
- Publication number
- CA2596421A1 CA2596421A1 CA002596421A CA2596421A CA2596421A1 CA 2596421 A1 CA2596421 A1 CA 2596421A1 CA 002596421 A CA002596421 A CA 002596421A CA 2596421 A CA2596421 A CA 2596421A CA 2596421 A1 CA2596421 A1 CA 2596421A1
- Authority
- CA
- Canada
- Prior art keywords
- compound
- hydrotalcite
- anionic clay
- relatively hard
- relatively
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- Catalysts (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
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.
Claims (11)
1. A process for making a relatively hard, anionic clay compound, said process comprising:
(1) converting a relatively soft anionic clay compound into a form suitable for catalysis, chemical species sorbtion, SO x sorbing, anion exchanging, or a combination thereof;
(2) heat treating the relatively soft, anionic clay compound to create a heat treated, non-anionic clay compound;
and (3) hydrating the heat treated, non-anionic clay compound to obtain relatively hard, anionic clay compound.
(1) converting a relatively soft anionic clay compound into a form suitable for catalysis, chemical species sorbtion, SO x sorbing, anion exchanging, or a combination thereof;
(2) heat treating the relatively soft, anionic clay compound to create a heat treated, non-anionic clay compound;
and (3) hydrating the heat treated, non-anionic clay compound to obtain relatively hard, anionic clay compound.
2. The process of claim 1, wherein the heat treating of the relatively soft anionic clay compound is carried out at a temperature between about 300°C and 850°C.
3. The process of claim 1, wherein the relatively hard, anionic clay compound is subjected to a second heat treatment to form a "collapsed" anionic clay compound.
4. The process of claim 1, wherein relatively hard, anionic clay is subjected to a second heat treatment at a temperature between about 300°C and about 850°C.
5. The process of any one of claims 1 to 4, wherein the relatively hard, anionic clay compound is impregnated with a solution containing a metallic oxidant, the metal oxidant being cerium, vanadium, platinum, palladium, rhodium, iridium, molybdenum, tungsten, copper, chromium nickel, manganese, cobalt, iron, ytterbium, uranium, or a combination thereof.
6. A process for making a relatively hard, hydrotalcite-like compound, said process comprising:
(1) converting a relatively soft, hydrotalcite-like compound into a form suitable for end uses of catalysis, SO x absorbing or anion exchanging;
(2) heat treating the relatively soft, hydrotalcite-like compound to obtain a heat treated, non-hydrotalcite-like compound; and (3) hydrating the heat treated non-hydrotalcite-like compound to obtain a relatively hard, hydrotalcite-like compound.
(1) converting a relatively soft, hydrotalcite-like compound into a form suitable for end uses of catalysis, SO x absorbing or anion exchanging;
(2) heat treating the relatively soft, hydrotalcite-like compound to obtain a heat treated, non-hydrotalcite-like compound; and (3) hydrating the heat treated non-hydrotalcite-like compound to obtain a relatively hard, hydrotalcite-like compound.
7. The process of claim 6, wherein the relatively hard, hydrotalcite-like compound is subjected to a second heat treatment to form another "collapsed" hydrotalcite-forming compound.
8. The process of claim 6, wherein the heat treating of the relatively soft, hydrotalcite-like compound is carried out at a temperature between about 300°C and about 850°C.
9. The process of claim 6, wherein the relatively soft, hydrotalcite-like compound is converted into a desirable physical form prior to being heat treated and hydrated.
10. The process of any one of claims 6 to 9, wherein the relatively soft, hydrotalcite-like compound is Alcoa's HTC-30®
hydrotalcite product.
hydrotalcite product.
11. The process of any one of claims 6 to 9, wherein the relatively hard, hydrotalcite-like compound is impregnated with a solution containing a metallic oxidant, the metallic oxidant beign cerium, vanadium, platinum, palladium, rhodium, iridium, molybdenum, tungsten, copper, chromium nickel, manganese, cobalt, iron, ytterbium, uranium, or a combination thereof.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/955,017 US6028023A (en) | 1997-10-20 | 1997-10-20 | Process for making, and use of, anionic clay materials |
| US955,017 | 1997-10-20 | ||
| CA002308748A CA2308748C (en) | 1997-10-20 | 1998-09-15 | Process for making and use of anionic clay materials |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002308748A Division CA2308748C (en) | 1997-10-20 | 1998-09-15 | Process for making and use of anionic clay materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2596421A1 true CA2596421A1 (en) | 1999-04-29 |
| CA2596421C CA2596421C (en) | 2012-08-07 |
Family
ID=38621164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2596421A Expired - Lifetime CA2596421C (en) | 1997-10-20 | 1998-09-15 | Process for making and use of anionic clay materials |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2596421C (en) |
-
1998
- 1998-09-15 CA CA2596421A patent/CA2596421C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2596421C (en) | 2012-08-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20180917 |