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EP0155824A2
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Method for preparing hydrocarbon catalytic cracking catalyst compositions
Assignee: JGC Catalysts and Chemicals Ltd
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Filing: 1985-03-14
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Granted: —
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Expires: 2005-03-14
Abstract
Abstract A catalyst composition suitable for catalytic cracking of a heavy hydrocarbon oil containing large amounts of metal contaminants is prepared by the steps of spray-drying an aqueous slurry containing a flash calcined alumina obtained by contacting an aluminum hydroxide prepared Bayer's process with a hot air of 350-700°C for 5 seconds or less, clay being predominantly composed of silica and alumina, a precursor of a siliceous inorganic oxide and a crystalline aluminosilicate; washing this particle until the alkali metal content therein is reduced to 1.0wt% or less as oxide; and thereafter incorporating a rare earth component in the particle.
Inventors
- 👤 Goro Sato
- 👤 Masamitsu Ogata
- 👤 Takanori Ida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 16:34
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/0009; B01J37/0027; B01J37/0045; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/084; B01J29/085; B01J29/088; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; B01J2229/00; B01J2229/30; B01J2229/42
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
93 words
A method for preparing hydrocarbon cracking catalyst compositions which comprises forming a fine spherical particle by spray- drying an aqueous slurry containing a flash calcined alumina obtained by contacting an aluminum hydroxide prepared by Bayer's process with a hot air of 350-700°C for 5 seconds or less, clay being predominantly composed of silica and alumina, a precursor of a siliceous inorganic oxide and a crystalline aluminosilicate; washing this particle until the alkali metal content therein is reduced to 1.0wt% or less as oxide; and thereafter introducing a rare earth component in the particle.
Claim 2
Independent Claim
93 words
A method for preparing hydrocarbon cracking catalyst compositions which comprises forming a fine spherical particle by spray- drying an aqueous slurry containing a flash calcined alumina obtained by contacting an aluminum hydroxide prepared by Bayer's process with a hot air of 350-700°C for 5 seconds or less, clay being predominantly composed of silica and alumina, a precursor of a siliceous inorganic oxide and a crystalline aluminosilicate; washing this particle until the alkali metal content therein is reduced to 1.0wt% or less as oxide; and thereafter introducing a rare earth component in the particle.
Claim 3
Dependent Claim
30 words
A method according to Claim 1 wherein the amount of said rare earth component introduced in the dealkalized fine spherical particle is 0.03-5wt% of the final catalyst composition as oxide.
Claim 4
Dependent Claim
32 words
A method according to Claim 1 wherein said precursor of a siliceous inorganic oxide is selected from the group consisting of a silicic acid solution, silica hydrosol, silica hydrogel and sodium silicate.
Claim 5
Dependent Claim
18 words
A method according to Claim 1 wherein said clay is at least one member of kaolin and bentonite.
Claim 6
Dependent Claim
26 words
A method according to Claim 1 wherein said crystalline aluminosilicate is at least one member of hydrogen exchanged, ammonium exchanged and rare earth exchanged crystalline aluminosilicates.
Claim 7
Dependent Claim
44 words
A method according to Claim 1 which prepares catalyst compositions containing 10-30% of the flash calcined alumina, 30-50% of the clay, 5-50% of the silica derived from the precursor and 3-40% of the crystalline aluminosilicate based on the weight of the final catalyst composition.
Claim 8
Dependent Claim
37 words
A method according to Claim 1 wherein the spray-dried particle is dipped in an impregnating liquid comprising an aqueous solution of chloride or sulfate of the rare earth metal for incorporating the rare earth metal component therein.
References Cited (Backward Citations)
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