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US 5,295,582 AGranted
Recycling post consumer plastic products
AssigneeNovacor Chemicals (International) S.A.
InventorErvin R. Dan
Life of this patent
Estimating the term…
Abstract
The present invention relates to the cleaning of recyclable plastic. More particularly the recyclable plastic is treated at a frequency from 20 to 60 KHz, optionally in the presence of an antiseptic agent and in the absence of a surfactant. This treatment cleans waste, and particularly waste containing protein, such as medical or food waste so it is suitable for recycling.
Claims39
A process for removing at least one contaminant from one or more rigid plastic wastes comprising:
- i) submersing at least a portion of said rigid plastic waste in a liquid at atmospheric pressure and a temperature from 0.degree. to 35.degree. C., which liquid contains from 0 to 1 weight % of one or more cleaning agents;
- ii) subjecting said liquid to a transducer to generate waves through said liquid at a frequency from 20 to 60 KHz for a time sufficient to remove said at least one contaminant from said rigid plastic waste;
- iii) separating said rigid plastic waste from said liquid;
- and
- iv) recycling said liquid.
2 more elements
Dependencies are inferred from the claim text.