PRODUCTION OF MONOMERIC CLEAVAGE PRODUCTS BY THERMAL DECOMPOSITION OF POLYMERS

PRODUCTION OF MONOMERIC CLEAVAGE PRODUCTS BY THERMAL DECOMPOSITION OF POLYMERS

1,181,001. Depolymerization. DEUTSCHE GOLD-UND SILBER-SCHEIDEAN STALT. 26 Jan., 1967 [5 Feb., 1966], No. 3920/67. Heading C2C. Monomers are prepared from finely-ground polymers (particle size not more than 6 mm. derived from monomers with a conjugatable bond system, by subjecting them to airseparati...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: SVEN-PETER MANNSFELD, KLAUS-JURGEN PAULSEN, ERICH BUCHHOLZ
Format: Patent
Sprache:eng
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:1,181,001. Depolymerization. DEUTSCHE GOLD-UND SILBER-SCHEIDEAN STALT. 26 Jan., 1967 [5 Feb., 1966], No. 3920/67. Heading C2C. Monomers are prepared from finely-ground polymers (particle size not more than 6 mm. derived from monomers with a conjugatable bond system, by subjecting them to airseparation and pyrolysis at a temperature at least 100‹ C., and preferably between 300‹ and 500‹ C. above the depolymerization temperature polybutadiene, polystyrenes, polyformaldehyde and polymethyl methacrylate are mentioned and an example describes the treatment of polymethyl methacrylate in an apparatus comprising a cleavage tube, stabilizer, cooling and purification systems.