Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With regeneration – reclamation – reuse – recycling or...
Patent
1975-04-11
1977-03-08
Bashore, S. Leon
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With regeneration, reclamation, reuse, recycling or...
162 33, D21C 1104, D21C 1112
Patent
active
040111296
ABSTRACT:
A method of increasing the chemical recovery capacity of a Kraft Recovery Furnace by injecting solid pellets of sodium sulphate and sodium carbonate directly onto the char bed in the reducing zone of the furnace while maintaining the temperature and reducing atmosphere in this zone thereby to form a smelt containing sodium sulphide and sodium carbonate from the injected pellets. These pellets may be produced from a further quantity of balck liquor in an auxiliarly incinerator such as a fluid bed combustion unit. This invention permits increasing the recovery capacity of a furnace without necessitating the construction of a new Recovery Furnace.
REFERENCES:
patent: 1808773 (1931-06-01), Grondova
patent: 2574193 (1951-11-01), Savell
patent: 3309262 (1967-03-01), Copeland et al.
patent: 3366535 (1968-01-01), Cann
patent: 3523864 (1970-08-01), Osterman et al.
patent: 3578396 (1971-05-01), Priestley
patent: 3635790 (1972-01-01), Heath
patent: 3862909 (1975-01-01), Copeland
"Elimination of Sulfite Mill Wastes by Fluid Bed Treatment," Copeland et al., American Paper Industry, Mar. 1967.
"Kraft Overload Relief System," Copeland Process Corporation, Prior to 1969.
"New Fluidized Bed System Produces Salcake From Spent NSSC Liquor" Paper Trade Journal p. 43, July 26, 1965.
Bashore S. Leon
Domtar Limited
Kratz Peter F.
Rowley C. A.
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