Separation process for carpets

Details Separation process for carpets Separation process for carpets

2006-12-26

2006-12-26

Matecki, Kathy (Department: 3654)

Classifying, separating, and assorting solids

Fluid suspension

Liquid

C209S003000, C209S173000, C241S020000, C241S021000, C241S024120, C241S024170, C521S040000, C521S049800

Reexamination Certificate

active

07152742

ABSTRACT:
Comminuted carpet pieces are fed to a first stirred tank together with an aqueous solution containing separating salt, to form a first suspension, which is fed to a first mechanical separating stage. A first high-solids phase, a second high-solids phase containing polymer fiber material, and a liquid phase are obtained therefrom. The second high-solids phase is mixed with a water-containing separation solution in a stirred tank, to give a second suspension, which is fed to a second mechanical separating stage. A third high-solids phase, a polymer fiber material-rich phase and a liquid phase are withdrawn therefrom. An acid which is stronger than H2CO3is introduced into the stirred tank together with the water-containing separation solution, and the pH of the liquid in the stirred tank is adjusted to 2–6.

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