DE1795029

DE1795029

1,181,772. Recovering formaldehyde. SOC. ITALIANA RESINE S.p.A. 26 July, 1968 [1 Aug., 1967], No. 35910/68. Heading C2C. [Also in Division C3] The vapours obtained in the stabilization of polyoxymethylenes by degradative reaction with anhydrides in an appropriate solvent are rectified in a fractiona...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ANESS, GIORGIO, ACKERMANN, JACOB, FERRE, FRANCO
Format: Patent
Sprache:eng
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC CHEMISTRY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Zusammenfassung:1,181,772. Recovering formaldehyde. SOC. ITALIANA RESINE S.p.A. 26 July, 1968 [1 Aug., 1967], No. 35910/68. Heading C2C. [Also in Division C3] The vapours obtained in the stabilization of polyoxymethylenes by degradative reaction with anhydrides in an appropriate solvent are rectified in a fractionation column, the anhydride-solvent mixture being obtained at the base and the solvent-formaldehyde mixture being obtained at the top. The latter mixture may then be treated, e.g. with water or cyclohexanol to extract the formaldehyde as formalin or cyclohexanolhemimethylal. A suitable solvent is toluene.