Abrégé

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).

Classes IPC  ?

• B08B 3/08 - Nettoyage impliquant le contact avec un liquide le liquide ayant un effet chimique ou dissolvant
• B08B 3/04 - Nettoyage impliquant le contact avec un liquide
• C11D 7/26 - Composés organiques contenant de l'oxygène
• C11D 7/50 - Solvants
• B29B 17/00 - Récupération de matières plastiques ou d'autres constituants des déchets contenant des matières plastiques

Abrégé

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).

Classes IPC  ?

• C11D 3/20 - Composés organiques contenant de l'oxygène
• C11D 7/26 - Composés organiques contenant de l'oxygène
• B29B 17/02 - Séparation de matières plastiques des autres matières
• B09C 1/02 - Extraction au moyen de liquides, p. ex. lavage, lixiviation
• B09C 1/08 - Régénération de sols pollués par des procédés chimiques
• C11B 13/04 - Obtention de graisses, huiles ou acides gras à partir de résidus des produits adsorbants usés
• B01J 20/12 - Argiles d'origine naturelle ou terres décolorantes
• B01J 20/34 - Régénération ou réactivation
• B01J 20/10 - Compositions absorbantes ou adsorbantes solides ou compositions facilitant la filtrationAbsorbants ou adsorbants pour la chromatographieProcédés pour leur préparation, régénération ou réactivation contenant une substance inorganique contenant de la silice ou un silicate
• C11D 11/00 - Méthodes particulières pour la préparation de compositions contenant des mélanges de détergents

Abrégé

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.

Classes IPC  ?

• B29B 17/00 - Récupération de matières plastiques ou d'autres constituants des déchets contenant des matières plastiques