Process for the separation of carpet materials

Details Process for the separation of carpet materials Process for the separation of carpet materials

1994-12-15

1997-02-04

Rosenbaum, Mark

Solid material comminution or disintegration

Processes

With application of fluid or lubricant material

241 21, 241 2417, 241 2418, B02C 1912

Patent

active

055989802

ABSTRACT:
Process for separating preshredded carpet materials into as many as three main components of different densities which comprises finely comminuting the carpet materials in the liquid phase. The density of the liquid phase is adjusted to a level between two adjacent densities of the components. Separation of one component from the other components and from the liquid phase in the suspension is effected in a double-cone full-jacketed screw centrifuge. The process is repeated if there are two materials of different densities in the other components fraction. The process is useful for recovering nylon, polyester, or polypropylene from carpet scraps which nylon or polyester can be depolymerized to reusable monomers and which polypropylene can be reprocessed into pellets, non-wovens or fibers.

REFERENCES:
patent: 5169870 (1992-12-01), Corbin et al.
patent: 5197678 (1993-03-01), Trezek et al.
patent: 5230473 (1993-07-01), Hagguist et al.
patent: 5236603 (1993-08-01), Sampson
patent: 5320450 (1994-06-01), Smith
Centrifugal System Provides for Waste Separation, European Plastics News, 5-93, vol. 20.

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