Plastic separation method

Details Plastic separation method Plastic separation method

1997-02-21

1999-09-07

Reifsnyder, David A.

Liquid purification or separation

Processes

Separating

210781, 210788, 210805, 210806, 209 4, 209 16, 209153, 209725, 241 20, B01D 2126

Patent

active

059482761

ABSTRACT:
The present invention pertains to the separation of mixtures of plastics, contaminated with, among other things, mineral heavy materials such as e.g. sand or metal refuse. Separation occurs according to density in a separating liquid in the centrifugal field of the rotating suspension. The present invention provides the connection of a hydrocyclone before a separating centrifuge. The mineral heavy materials are separated in advance in the hydrocyclone and the plastic mixture is further separated in the centrifuge. Wear on components of the separating centrifuge caused by these heavy materials can be avoided, and in some applications a second separating stage at a higher separation density can be eliminated.

REFERENCES:
patent: 5342281 (1994-08-01), Unkelbach et al.
patent: 5390860 (1995-02-01), Ali et al.
patent: 5518616 (1996-05-01), Previero

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