Abstract

The invention relates to a non-corrosive process for cleaning a recyclable material comprising the following steps: (a) providing a contaminated recyclable material; (b) treating the contaminated recyclable material at a temperature in the range of from 45-30° C. with a solution that contains one or more polyols to remove contaminants from the contaminated recyclable material, wherein the one or more polyols is (are) present in an amount of at least 15 wt. %, based on the total weight of the solution, thereby forming a liquid 10 mixture which comprises one or more polyols, contaminants removed from the recyclable material, and treated recyclable material; (c) separating at a temperature in the range 10-55° C. at least part of the recyclable material as obtained in step (b) from the liquid mixture as obtained in step (b); (d) allowing at least part of the remaining liquid mixture as obtained in step (c) to phase-1 separate into a polyol phase and a phase which contains contaminants removed from the contaminated recyclable material; (e) recovering the polyol phase as obtained in step (d); (f) recovering the phase which contains contaminants removed from the recyclable material as obtained in step (d); and 20 (g) recovering the separated recyclable material as obtained in step (c).

IPC Classes  ?

• B08B 3/08 - Cleaning involving contact with liquid the liquid having chemical or dissolving effect
• B08B 3/04 - Cleaning involving contact with liquid
• C11D 7/26 - Organic compounds containing oxygen
• C11D 7/50 - Solvents
• B29B 17/00 - Recovery of plastics or other constituents of waste material containing plastics

Abstract

The invention relates to a non-corrosive process for cleaning a recyclable material comprising the following steps: (a) providing a contaminated recyclable material; (b) treating the contaminated recyclable material at a temperature in the range of from 45- 30 °C with a solution that contains one or more polyolsto remove contaminants from the contaminated recyclable material, wherein the one or more polyols is (are) present in an amount of at least 15 wt.%, based on the total weight of thesolution, thereby forming a liquid 10 mixture which comprises one or more polyols, contaminants removed from the recyclable material, and treated recyclable material; (c) separating at a temperature in the range 10-55 °C at least part of the recyclable material as obtained in step (b) from the liquid mixture as obtained in step (b); (d) allowing at least part of the remaining liquid mixture as obtained in step (c) to phase-1 separate into a polyol phase and a phase which contains contaminants removed from the contaminated recyclable material; (e) recovering the polyol phase as obtained in step (d); (f) recovering the phase which contains contaminants removed from the recyclable material as obtained in step (d); and20 (g) recovering the separated recyclable material as obtained in step (c).

IPC Classes  ?

• C11D 3/20 - Organic compounds containing oxygen
• C11D 7/26 - Organic compounds containing oxygen
• B29B 17/02 - Separating plastics from other materials
• B09C 1/02 - Extraction using liquids, e.g. washing, leaching
• B09C 1/08 - Reclamation of contaminated soil chemically
• C11B 13/04 - Recovery of fats, fatty oils or fatty acids from waste materials from spent adsorption materials
• B01J 20/12 - Naturally occurring clays or bleaching earth
• B01J 20/34 - Regenerating or reactivating
• B01J 20/10 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
• C11D 11/00 - Special methods for preparing compositions containing mixtures of detergents

Abstract

Process for cleaning recyclable plastic material comprising the following steps: ∙ (a) providing a contaminated recyclable non-styrene based plastic material; ∙ (b) contacting the contaminated recyclable plastic material at a temperature in the range of from 5-35 °C with a liquid mixture which comprises a water phase and a separate solvent phase to remove contaminants from the contaminated recyclable plastic material, whereby the solvent phase comprises a fatty acid ester and is present in the form of droplets which are at least partly distributed in the water phase, and wherein the water phase is present in an amount of more than 50 wt. %, based on total weight of the liquid mixture; ∙ (c) separating at least part of recyclable plastic material as obtained in step (b) from the liquid mixture as obtained in step (b) which contains contaminants removed from the contaminated recyclable plastic material; ∙ (d) allowing at least part of the liquid mixture as obtained in step (c) to phase-separate into a water phase and a solvent phase which contains contaminants removed from the contaminated recyclable plastic material; and ∙ (e) recycling at least part of the water phase as obtained in step (d) to step (b). Use of an aqueous emulsion of fatty acid ester containing more than 50 wt.% of water to remove contaminants from a recyclable non-styrene based plastic material.

IPC Classes  ?

• B29B 17/00 - Recovery of plastics or other constituents of waste material containing plastics