Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives
Patent
1976-04-29
1978-06-27
Griffin, Ronald W.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carbohydrates or derivatives
106187, 106203, 252364, 536 84, 536 99, 106197R, C08B 1102, C08B 1600
Patent
active
040976661
ABSTRACT:
Natural or modified polysaccharides are dissolved in a solvent system comprising dimethyl sulfoxide and formaldehyde. The solvent system is particularly suitable for dissolving cellulose due to the fact that cellulose is rapidly dissolved under moderate conditions of temperature and pressure. The dissolved polysaccharides are readily recovered from the solvent system by diluting the solvent system with water or a short chain alcohol.
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"The New Cellulose Solvent: Dimethyl Sulfoxide-Paraformaldehyde", Johnson et al., 39th Executive Converence, The Institute of Paper Chemistry, Appleton, Wis. May 8, 1975.
"Dimethyl Sulfoxide-Paraformaldehyde: A Nondegrading Solvent for Cellulose", Johnson et al., Technical Paper Series No. 5, Apr. 1975, (first presented at the eighth Cellulose Conference at Syracuse, New York, May 19-23, 1975).
Johnson Donald C.
Nicholson Myron D.
Griffin Ronald W.
The Institute of Paper Chemistry
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