Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1976-08-31
1978-03-21
Garvin, Patrick P.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
526226, B01J 2714
Patent
active
040803112
ABSTRACT:
Thermally stable composite precipitates containing aluminum phosphate and alumina and having a surface area of from about 100 to about 200 m.sup.2 /g together with an average pore radius of from 75 to 150 A are defined. These materials are prepared by neutralizing an aqueous solution of aluminum cations and PO.sub.4 anions at a controlled pH of between 7 and 10.0, and wherein the neutralizing medium is either ammonia or certain defined amine based materials such as ammonium hydroxide, ammonium carbonate or urea. There is a stoichiometric excess of aluminum to phosphorus over that required to form AlPO.sub.4. Due to their thermal stability these alumina-aluminum phosphates are particularly useful as catalyst supports for various reactions, including polymerization of ethylene.
REFERENCES:
patent: 2301913 (1942-11-01), Ueltman
patent: 2349827 (1944-05-01), Mattox
patent: 2365623 (1944-12-01), Bremner et al.
patent: 3271299 (1966-09-01), Kearby
patent: 3320331 (1967-05-01), Gaspar
patent: 3342750 (1967-09-01), Kearby
patent: 3904550 (1975-09-01), Pine
patent: 3969273 (1976-07-01), Brown et al.
Garvin Patrick P.
Gulf Research & Development Company
Wright William G.
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