Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With regeneration – reclamation – reuse – recycling or...
Patent
1984-02-22
1986-12-09
Doll, John
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With regeneration, reclamation, reuse, recycling or...
162 47, 423432, 423640, 423DIG3, C01F 524
Patent
active
046278885
ABSTRACT:
The present invention seeks to provide a method in which the soda lye obtained as a result of cellulose cooking process and unslaked lime are used for producing white liquor which can be re-used in the cooking process. In this method, the heat released by the slaking of lime with soda lye is recovered by a high pressure slaking process wherein the heat is transferred, either to the steam separating from the lye, which steam is then led to the desired application, or to some other medium to be heated. The present invention is characterized in that the soda lye to be causticized is divided into two parts, one of which is used for the slaking of lime by adding to it all the unslaked lime needed for the causticizing process, and that, following slaking, the two volumes are brought together for the actual causticizing reaction involving the total amount of lye needed. The present invention provides the advantage that the amount of lye needed is smaller, and so the temperature can be increased.
REFERENCES:
patent: 1862176 (1932-06-01), Church et al.
patent: 2552183 (1951-05-01), Knight
patent: 2888324 (1959-05-01), Allen
patent: 2902346 (1959-09-01), Volk
patent: 2979380 (1961-04-01), Miller
patent: 3194638 (1965-07-01), Neuville
patent: 3531370 (1970-09-01), Gould
patent: 3677703 (1972-07-01), Minnick
patent: 4159922 (1979-07-01), Cosper
patent: 4302281 (1981-11-01), Ryham
patent: 4451443 (1984-05-01), Libby
Doll John
Enso-Gutzeit Oy
Langel Wayne A.
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