Manufacture of Portland cement using spent claus catalyst
AssigneeSaudi Arabian Oil Company
InventorMansour A. Al-Shafei
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Abstract
Spent Claus catalyst having a high alumina content is used as an ingredient in the manufacture of Portland cements in place of all or a portion of a conventional source of alumina. The spent Claus catalyst is preferably of a small particle size and can be ground to the desired fineness before mixing with the other ingredients that are heated in a conventional kiln to produce the cement composition. Finely ground spent Claus catalyst can also be used as an additive at levels of 0.1% to 2% by weight to increase the thickening time of shallow casing cement slurries.
Claims10
A Portland cement produced in a heated kiln from a composition comprising an alumina-containing spent Claus catalyst that is added during formation of the Portland cement clinker.
A Portland cement composition formed in a kiln by heating a mixture comprising limestone, sand and spent Claus catalyst that is added during formation of the Portland cement clinker.
A method of manufacturing a Portland cement comprising:
- a. adding to a kiln a mixture of ingredients that include limestone, sand and an alumina-containing spent Claus catalyst containing alumina;
- b. heating the kiln to a temperature of up to 1500° and mixing the ingredients to form clinkers;
- c. grinding the clinkers to form a fine powder that is Portland cement.
Dependencies are inferred from the claim text.