Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With decortication or mechanical preparation of textile fibers
Patent
1988-05-27
1989-12-26
Chin, Peter
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With decortication or mechanical preparation of textile fibers
162 90, 162 98, 162 99, 162148, 162149, D21B 114
Patent
active
048895911
ABSTRACT:
The present process produces a long fiber suitable for making various paper products. The long fiber is derived from Crotalaria juncea. The processing consists of a particular technique for preparing the fiber for digestion and a particular digestion sequence. In the preparation of the fiber for digestion it is dried to less than about 30 percent moisture, moist depithed, washed and wet depithed. The fiber is then processed at a high caustic concentration using a sequence of digestion-pressure reduction-digestion. Optionally there can be a third stage of digestion with a pressure reduction prior to the digestion. After digestion has been completed the fiber is refined and sent to blowdown. The fiber is then screened, washed and bleached. The resulting long fiber will product a high quality paper or is admixed with short fibers and various paper products can be made.
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patent: 4347101 (1982-08-01), Villavicencio
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1123 Misra, N.D. Chemical Pulp from Sunn Hemp Stalks; Indian Pulp Paper 18, No. 3: 211-214, (Sep. 1963); AB1PC34:1168.
1124 Misra, N. D. A Continuous Elutriation--Method for Pulping Bagasse Tappi, 46, No. 2: 146-9A, (Feb. 1963); ABIPC 33:1456.
Fiber Crops; James M. Dempsey, Univ. of Florida Press 1975--Chapter 9, Sunn Hemp.
Gomez-Estevez Camilo
Villavicencio Eduardo J.
Chin Peter
McGreal Michael J.
Process Evaluation and Development Corporation
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