EP0291201A2
Expired / Lapsed
EP
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Process for the production of spherical particles
Assignee: BP PLC
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Filing: 1988-04-28
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Granted: —
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Expires: 2008-04-28
Abstract
Abstract A method for making spherical particles, which comprises: (a) kneading powdered raw material, preferably a refractory inorganic material, liquid and wax to form a dough/agglomerated granules, (b) separating, preferably by sieving, the dough/agglomerated granules to a predetermined size fraction without extruding, and (c) spheridising the granules in a heated rotating bowl. The method is particularly useful of the production of catalysts from refractory inorganic materials.
Inventors
- 👤 Dilip Dave
- 👤 Andrew Holt
- 👤 Timothy Kevin Mcniff
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 09:43
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/14; B01J2/28; B01J21/00; B01J21/02; B01J21/04; B01J35/00; B01J35/50; B01J35/51; B01J37/00; B01J37/0009
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
43 words
A method for making spherical particles, which comprises: (a) kneading powdered raw material, liquid and wax to form a dough/agglomerated granules, (b) separating the dough/agglomerated granules to a predetermined size fraction without extruding, and (c) spheridising the granules in a heated rotating bowl.
Claim 2
Independent Claim
43 words
A method for making spherical particles, which comprises: (a) kneading powdered raw material, liquid and wax to form a dough/agglomerated granules, (b) separating the dough/agglomerated granules to a predetermined size fraction without extruding, and (c) spheridising the granules in a heated rotating bowl.
Claim 3
Dependent Claim
17 words
A method as claimed in claim 1, in which the raw material is a refractory inorganic material.
Claim 4
Dependent Claim
14 words
A method as claimed in claim 2, in which the raw material is alumina.
Claim 5
Independent Claim
21 words
A method as claimed in any one of claims 1 to 3, in which step (b) is carried out by sieving.
Claim 6
Independent Claim
38 words
A method as claimed in any one of claims 1 to 4, in which the liquid is water, a dilute mineral and/or organic acid, a solution of an alkali or alkaline earth compound, a surfactant or a binder.
Claim 7
Independent Claim
29 words
A method as claimed in any one of claims 1 to 5, in which the amount of liquid used in step (a) is 5 to 65% v/w on powder.
Claim 8
Independent Claim
27 words
A method as claimed in any one of claims 1 to 6, in which the amount of wax used in step (a) is 2 to 10% w/w.
Claim 9
Independent Claim
27 words
A method as claimed in any one of claims 1 to 7, in which the spheridiser bowl is heated to a temperature of from 25 to 100°C.
References Cited (Backward Citations)
No citation records indexed.
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