METHOD FOR SEPARING POLYETHYLENE AND POLYPROPYLENE

• Main Authors: HOLLSTEIN,AXEL,DE, NEITZEL,ULRICH,DE, KLEINE-KLEFFMANN,ULRICH,DE, STAHL,INGO,DE, GEISLER,IRING,DE
• Format: Patent
• Language: English
• Published: 28.12.1993
• Edition: 5
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; DISPOSAL OF SOLID WASTE; GENERAL PROCESSES OF COMPOUNDING; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROMSOLID MATERIALS OR FLUIDS; MAKING GRANULES OR PREFORMS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECLAMATION OF CONTAMINED SOIL SOIL; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS; SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

PCT No. PCT/EP92/01614 Sec. 371 Date Apr. 9, 1993 Sec. 102(e) Date Apr. 9, 1993 PCT Filed Jul. 4, 1992 PCT Pub. No. WO93/03852 PCT Pub. Date Mar. 4, 1993.Plastic mixtures, in particular those of a similar density such as polyethylene and polypropylene, are separated electrostatically, whereby prior to charging, the mixture is subjected to a surface treatment.