Oxygen/ozone/peracetic aicd delignification and bleaching of cel

Details Oxygen/ozone/peracetic aicd delignification and bleaching of cel Oxygen/ozone/peracetic aicd delignification and bleaching of cel

1993-01-28

1995-02-07

Alvo, Steven

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Gas, vapor or mist contact

162 76, 162 78, D21C 9147, D21C 9153, D21C 916

Patent

active

053873173

ABSTRACT:
A method for delignification and bleaching of cellulosic pulp which comprises reacting a cellulosic pulp with peracetic acid, ozone and oxygen under conditions of acidic pH. The ozone substantially completely reacts with the pulp and, thereafter, the oxygen reacts with the pulp under under an acidic pH.

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Liebergott et al, "0.sub.2, O.sub.3 and Peroxide", Pulping & Bleaching Seminar, New Orleans, La., Nov. 1978.
Medwich V. Byrd, Jr. "Delignification and Bleaching of Chemical Pulps with Ozone:" a Literature Review Tappi Journal, 207-213, Mar. 1992.

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