Process for manufacturing hydrophobic adsorbents
AssigneeInstitut For Energetik Zentralstelle Fur Rationelle Energieanwendung
InventorsReiner Kinder, Johannes Teubel, Herbert Schuster, Christine Fanslau
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Abstract
A composite mass with a major proportion of inorganic material and a minor proportion of organic material, preferably from industrial waste products, is activated by dehydration of its organic constituents whereupon the mass is subjected to a two-phase pyrolytic process. In a first stage, lasting for 2 to 3 hours it is heated to about 600.degree. C. with carbonization of the organic constituents; in a second stage, lasting for 1 to 2 hours, the mass is sintered or consolidated at a temperature between about 900.degree. and 1150.degree. C.
Claims6
A process for manufacturing a hydrophobic adsorbent, comprising the steps of:
- (a) mixing fly ash and an organic constituent selected from the group which consists of bituminous material, rubber, fatty acids and residues thereof, molasses and waste sulfite liquor residue to form a mixture of solid inorganic and organic constituents;
- (b) dehydrating said organic constituents in said mixture by combining zinc chloride with said mass and heating said mass to a temperature of about 600.degree. C. in a nonoxidizing atmosphere and maintaining said temperature for a period of time sufficient to carbonize said organic constituents and transform said mixture into an activated mass;
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- (c) thereafter heating said mass to a higher temperature between substantially 900.degree. C. and 1150.degree. C. and maintaining said mass at said higher temperature for a postcarbonization period sufficient to consolidate said mass.
Dependencies are inferred from the claim text.