Process for the acid hydrolysis of waste cellulose to glucose

Details Process for the acid hydrolysis of waste cellulose to glucose Process for the acid hydrolysis of waste cellulose to glucose

1980-03-18

1982-02-23

Marcus, Michael S.

Sugar, starch, and carbohydrates

Processes

Carbohydrate manufacture and refining

127 1, 127 28, C13K 106, B01J 303

Patent

active

043167489

ABSTRACT:
A process and apparatus for the acid hydrolysis of waste cellulose to glucose of the type wherein waste cellulose is continuously fed into an inlet port of a twin screw extruder, water is continuously fed into reaction zone in the extruder downstream of the inlet port, the cellulose is continuously reacted with water in the presence of an acid catalyst at elevated temperature and pressure in the reaction zone while continuously conveying same to an outlet port of the extruder and the reacted cellulose is discharged from the extruder the elevated temperature and pressure in the reaction zone is maintained, has the elevated pressure is maintained by forming a dynamic seal zone at the upstream end of the reaction zone by providing an unthreaded and radially recessed discontinuity in the screws.

REFERENCES:
patent: 3382536 (1968-05-01), Fritsch et al.
patent: 3917507 (1975-11-01), Skidmore
patent: 4088528 (1978-05-01), Berger et al.
patent: 4201596 (1980-05-01), Church et al.
patent: 4214947 (1980-07-01), Berger

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