초록 ▼

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

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 being continuously conveyed to an outlet port of the extruder having a given diameter and the reacted cellulose is discharged from the extruder while the elevated temperature and pressure in the reaction zone is maintained. The elevated pressure is maintained by forming a dynamic seal zone at the upstream end of the reaction and continuously discharging the reacted material downstream of the outlet port at a predetermined volume rate of flow to maintain the pressure by passing the discharge through an orifice pipe having a smaller diameter than the given diameter of the outlet port.

대표청구항 ▼

In an apparatus for the acid hydrolysis of waste cellulose to glucose of the type having extruding means comprising a housing having means defining a cellulose inlet port receptive of waste cellulose, means defining a steam inlet port and means associated therewith for introducing steam into the cel

In an apparatus for the acid hydrolysis of waste cellulose to glucose of the type having extruding means comprising a housing having means defining a cellulose inlet port receptive of waste cellulose, means defining a steam inlet port and means associated therewith for introducing steam into the cellulose, means defining an outlet port, and a reaction zone between the cellulose inlet port and the outlet port, and twin screws for continuously conveying the waste cellulose through the reaction zone towards the outlet port, means for continuously feeding the waste cellulose to the cellulose inlet port and means for maintaining an elevated temperature and pressure within the reaction zone during discharge, the improvement wherein the maintaining means maintains an elevated pressure of 135 psi to 1000 psi and solely comprises means forming a dynamic seal in the twin screws at the upstream end of the reaction zone and a continuously open discharge orifice pipe downstream of the outlet port configured to permit a predetermined volume of flow necessary to maintain the elevated pressure.