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US 5,314,580 AGranted
Process for the removal of ink, resin, and adhesive residues from paper, textile fabrics and solid surfaces
AssigneeMauvin Material & Chemical Processing Limited
InventorVenanzio Di Tullio
Life of this patent
Estimating the term…
Abstract
A process for the preparation and use of a cleaning solution with both foaming and non foaming properties which can be used to de ink paper or clean surfaces which have been soiled either by the pulping of virgin or secondary recycled fiber or natural usage.
Claims9
A method of de-inking or cleaning paper and of recycling a liquid composition comprising:
- ______________________________________ Alkyl phenol polyethoxylate 0-10% Sodium silicate 1-2.5% Sodium hydroxide up to 2.5% Alkyl or dialkyl glycol or 10-40% diglycol ether and/or propyl glycol ether Alkyl acetate 0-10% Hydrogen peroxide or sodium 0-3% or calcium hypochlorite Triethylamine and/or 0-10% diethylmethylamine and/or dimethylpyridine and/or methyl pyridine and/or methyl piperidine Water to 100% ______________________________________
- having a lower critical solution temperature between 0.degree. C. and 100.degree. C. which method comprises:
- a) treating a pulp slurry of the paper with the liquid composition when in a single phase to remove ink from the paper slurry and the liquid composition;
- b) separating cleaned paper slurry from the liquid composition;
- c) heating the liquid composition resulting from step (a) to above its lower critical solution temperature to give an aqueous phase and an organic phase;
- d) separating and purifying at least one of the aqueous phase and the organic phase for reuse.
3 more elements
Dependencies are inferred from the claim text.