Apparatus for chemical conversion of materials

Details Apparatus for chemical conversion of materials Apparatus for chemical conversion of materials

1981-05-18

1982-12-14

Marcus, Michael S.

Sugar, starch, and carbohydrates

Apparatus

Hydrolyzing

127 28, 366 88, 366 90, 422137, B01J 304, B01J 400

Patent

active

043636713

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: 2048286 (1936-07-01), Pease
patent: 3085623 (1963-04-01), Ginaren
patent: 3801432 (1974-04-01), Free
patent: 3963558 (1976-06-01), Skidmore
patent: 3998688 (1976-12-01), Fischer et al.
patent: 4000032 (1976-12-01), Bergstrom et al.
patent: 4136251 (1979-01-01), Bice
patent: 4214947 (1980-07-01), Berger

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