Use of caustic and surfactant as a cleaner for recycled plastic

Details Use of caustic and surfactant as a cleaner for recycled plastic Use of caustic and surfactant as a cleaner for recycled plastic

1992-08-26

1994-07-19

Dean, Richard O.

Cleaning and liquid contact with solids

Processes

Hollow work, internal surface treatment

134 221, 134 2211, 134 2213, 134 2214, 134 2217, 134 251, 134 254, 134 29, 134 40, 252DIG1, B08B 304, B08B 308, C11D 712, C11D 166

Patent

active

053305817

ABSTRACT:
A method for cleaning plastic objects, especially for recycling, whereby liquid surfactant and liquid caustic are added as separate feed streams to water to create a cleaning solution. The concentrations of surfactant and caustic in the cleaning solution are periodically monitored so that the feed rates can be adjusted as necessary to maintain the optimum concentrations of each component.

REFERENCES:
patent: 4434069 (1984-02-01), Fairchild
patent: 4508635 (1985-04-01), Clarke
patent: 4624803 (1986-11-01), Balzer et al.
patent: 5055139 (1991-10-01), Personette

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