Recycling plant recovering paraffins and microcrystalline wax from contaminated mixed waste polyolefin plastics

The process recovers paraffins and microcrystalline wax from mixed waste plastic, which consists predominately of polyolefins. The feed is melted down and pre-cracked at 350-390 deg C. Melt is partially recycled. Cracking is completed at 390-430 deg C with partial melt recycle and destructive distil...

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Bibliographische Detailangaben
Hauptverfasser:	SALZMANN, JOACHIM.-OEK., 06667 BORAU, DE, GEBAUER, MANFRED.NAT., 06124 HALLE, DE
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT COMPOSITIONS BASED THEREON CRACKING HYDROCARBON OILS FUELS GENERAL PROCESSES OF COMPOUNDING GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS LUBRICANTS METALLURGY MINERAL WAXES ORGANIC MACROMOLECULAR COMPOUNDS PEAT PETROLEUM, GAS OR COKE INDUSTRIES PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS REFORMING OF NAPHTHA TECHNICAL GASES CONTAINING CARBON MONOXIDE TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	The process recovers paraffins and microcrystalline wax from mixed waste plastic, which consists predominately of polyolefins. The feed is melted down and pre-cracked at 350-390 deg C. Melt is partially recycled. Cracking is completed at 390-430 deg C with partial melt recycle and destructive distillation. The novel feature is that batches of the plastic fractions are plasticised, homogenised and forced into the melt of the pre-cracker directly, using a screw piston injector (4) in one or more heated cylindrical tube(s) (3).