Claims
- 1. A composition comprising discrete particles of a rare-earth compound selected from the group consisting of a rare-earth oxide, oxychloride and mixtures thereof dispersed in an acid reacted metakaolin matrix.
- 2. The composition of claim 1 which contains up to about 10 weight percent alumina binder.
- 3. The composition of claim 1 wherein the acid reacted metakaolin has the mole composition 0.8 to 1.0 Al.sub.2 O.sub.3.2 SiO.sub.2 and a surface area of above 150 m.sup.2 /g.
- 4. The composition of claim 1 wherein the rare-earth component comprises at least about 40 weight percent lanthanum/neodynium expressed as La.sub.2 O.sub.3 /Nd.sub.2 O.sub.3.
- 5. The composition of claim 1 which contains up to 10 weight percent alkaline earth metal oxide.
- 6. The composition of claim 1 which contains up to 50 weight percent zeolite/molecular sieve.
- 7. The composition of claim 1 having a particle size of 10 to 150 microns.
- 8. A catalytic cracking catalyst composition comprising a zeolite-containing cracking catalyst admixed with the composition of claim 1.
- 9. A method for preparing a particulate rare-earth-containing catalyst/additive composition which comprises:
- (a) preparing a slurry of rare-earth oxalate and acid reacted metakaolin;
- (b) spray drying the mixture; and
- (c) calcining the spray dried mixture at a temperature of 425.degree. to 870.degree. C.
- 10. The method of claim 9 wherein the slurry contains up to 10 weight percent alumina sol.
- 11. The method of claim 10 wherein the slurry is spray dried to obtain particles in the size range of about 10 to 150 microns, and an attrition index of 0 to 30 DI.
- 12. The method of claim 10 wherein the alumina sol is obtained by reacting acid reacted metakaolin slurry with aluminum metal powder.
- 13. The method of claim 10 wherein the alumina sol has the formula
- Al.sub.2+.mu. (OH).sub.3.mu. Cl.sub.6 wherein .mu.=about 4 to 12.
- 14. The composition of claim 5 wherein the alkaline earth metal oxide is magnesium oxide.
- 15. The method of claim 9 wherein the slurry includes an alkaline earth metal oxide.
- 16. The method of claim 15 wherein the alkaline earth metal oxide is magnesium oxide.
- 17. The method of claim 16 wherein the magnesium oxide is combined with a slurry of the rare-earth oxalate before mixing with a slurry of the acid reacted meta-kaolin.
- 18. The method of claim 9 wherein a zeolite/molecular sieve is included in said slurry.
Parent Case Info
This application is a continuation-in-part of U.S. Ser. No. 877,568, filed May 1, 1992, and now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (2)
Number |
Date |
Country |
0074581 |
Mar 1983 |
EPX |
2140791 |
Dec 1984 |
GBX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
877568 |
May 1992 |
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