Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With regeneration – reclamation – reuse – recycling or...
Patent
1976-06-28
1978-03-21
Corbin, Arthur L.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With regeneration, reclamation, reuse, recycling or...
162 65, 162 90, D21C 326
Patent
active
040802485
ABSTRACT:
The pulping of lignocellulosic material in the presence of oxygen gas and an alkaline liquid is improved by carrying out the process in two stages. In the first stage, the alkaline liquid is trickled over the material as the oxygen is passed up through the material. In the second stage, the material is submerged in oxygenated alkaline liquid which flows through the material.
REFERENCES:
patent: 2147618 (1939-02-01), Rawling
patent: 3024158 (1962-03-01), Grangaard et al.
patent: 3764464 (1973-10-01), Samuelson
patent: 3843473 (1974-10-01), Samuelson et al.
patent: 3944463 (1976-03-01), Samuelson et al.
Corbin Arthur L.
Crown Zellerbach Corporation
Horton Corwin R.
Teigland Stanley M.
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