METHOD FOR RECOVERING RAW MATERIALS FROM POLYURETHANE PRODUCTS
The invention relates to a method for recovering raw materials from polyurethane products, said method having a chemolysis process. The chemolysis process is characterized in that the polyurethane products are reacted with (i) an aminic chemolysis reagent selected from (a) a primary or secondary org...
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| creator | SCHERF, Sebastian SCHIFFER, Verena HINZMANN, Dirk LUEDTKE, Michelle FRANCISCO CASAL, Maria HAGEN, Torsten |
| description | The invention relates to a method for recovering raw materials from polyurethane products, said method having a chemolysis process. The chemolysis process is characterized in that the polyurethane products are reacted with (i) an aminic chemolysis reagent selected from (a) a primary or secondary organic amine, (b) an amino alcohol with a primary or secondary amino group, or (c) a mixture of (a) and (b) and (ii) water in the presence of (iii) a catalyst at a temperature ranging from 100 °C to 195 °C and at a pressure ranging from 900 mbar (abs) to 2000 mbar (abs), wherein the mass ratio of aminic chemolysis reagent and water to the polyurethane product ranges from 0.5 to 2.5, and the mass of the water ranges from 3.0% to 22% of the mass of the aminic chemolysis reagent. |
| format | Patent |
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| subjects | AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP |
| title | METHOD FOR RECOVERING RAW MATERIALS FROM POLYURETHANE PRODUCTS |
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