Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Including recovery of organic by-product
Patent
1988-01-11
1989-05-02
Chin, Peter
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Including recovery of organic by-product
162 16, 162 50, 162 76, 530507, D21C 1100
Patent
active
048265667
ABSTRACT:
A method of rapidly and efficiently treating ligno-cellulosic material for removal of lignin and other non-carbohydrates as well as non-cellulosic carbohydrates from cellulosic matter. Such material is first impregnated with a liquor which is a reaction product obtained by mixing triethyleneglycol with an arylsulfonic or other organic acid. The impregnated material is then rapidly heated by microwaving or application of rf energy to a temperature between about 119 degrees Centigrade to 130 degrees Centigrade and maintained at that temperature for only two to five minutes to reduce the effects of hydrolysis. Thereafter, conventional filtration and washing techniques are applied to achieve a residue material suitable for further use as a wood pulp or for further hydrolysis for the production of organic chemicals.
REFERENCES:
patent: 3442753 (1969-05-01), Burkart
patent: 3522230 (1970-07-01), Burkart
patent: 4451331 (1984-05-01), Raggam et al.
Brenner Leonard C.
Chin Peter
Le Tourneau College
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