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US 4,545,797 AGranted
Process for manufacturing porous slag
AssigneeTexaco Inc.
InventorAzza A. Elattar
Life of this patent
Estimating the term…
Abstract
Inert slag is calcined and treated with aqueous base or acid to yield product characterized by high surface area.
Claims6
A process for treating an inert glassy slag having a low surface area which comprises
- treating an inert glassy slag having a low surface area in a one-step operation in the presence of (i) base having a pK.sub.b of about 2-6 or (ii) acid having a pK.sub.a of about <1-5 thereby forming a treated slag of increased surface area;
- and
- recovering said treated slag of increased surface area.
A process for treating an inert glassy slag having a low surface area which comprises
- treating an inert glassy slag having a low surface area at 20.degree. C.-80.degree. C. for 15-60 minutes in aqueous medium in a one-step operation in the presence of (i) base having a pK.sub.b of about 2-6 or (ii) acid having a pK.sub.a of about <1-5 thereby forming a treated slag of increased surface area;
- and
- recovering said treated slag of increased surface area.
A process for treating an inert oxide slag having a substantial carbon content which comprises
- calcining said slag at 500.degree. C.-600.degree. C. for 1-3 hours in an oxidizing atmosphere thereby forming an oxidized slag:
- treating said oxidized slag at 20.degree. C.-80.degree. C. for 15-60 minutes in an aqueous medium in a one-step operation in the presence of (i) base having a pK.sub.b of about 2-6 or (ii) acid having a pK.sub.a of about <1-5 thereby forming a treated oxidized slag;
- and
- recovering said treated oxidized slag.
1 more element
A treated glassy slag of increased surface area prepared by the process which comprises
- treating said inert glassy slag having a low surface area in a one-step operation in the presence of (i) base having a pK.sub.b of about 2-6 or (ii) acid having a pK.sub.a of about 1-5 thereby forming a treated slag of increased surface area;
- and
- recovering said treated slag of increased surface area.
Dependencies are inferred from the claim text.