Process for the preparation of diglycerol and/or polyglycerol

US5243086A · kind A · utility

Assignee

• Deutsche Solvay-Werke GmbH · DE

Inventors

• Gerald Jakobson · Rheinberg, DE
• Werner Siemanowski · Rheinberg, DE
• Helmut Dillenburg · Rheinberg, DE

Key dates

• Filing date: Sep 25, 1992
• Grant date: Sep 7, 1993
• Expiry date: Sep 25, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C43/135
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of a composition containing diglycerol, in which process at least a stoichiometric amount of isopropylideneglycerol is reacted with .alpha.-monochlorohydrin in the presence of at least one alkaline compound at sufficient temperatures to yield an intermediate product composition containing monoisopropylidenediglycerol and a salt. Most of the salt and water formed is removed from the intermediate product composition, and any unreacted isopropylideneglycerol is removed by distillation. The remaining intermediate product composition containing monoisopropylidenediglycerol is subsequently reacted with water in the presence of at least one acidic catalyst at sufficient temperatures to yield a product composition containing diglycerol and acetone and substantially no cyclic glycerols.