Process for the preparation of saccharose-hydroxy alkyl ethers
AssigneeBayer Aktiengesellschaft
InventorsDieter Maassen, Roland Nast, Heinrich Bormann, Helmut Piechota, Karl-Josef Kraft
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Abstract
A process for the preparation of saccharose polyethers which makes saccharose polyethers with a high functionality easily available. This is accomplished by subjecting mixtures of saccharose, a small quantity of water, a small quantity of a low molecular weight polyol, monoamine or polyamine or any combination of these to an alkoxylation reaction the reaction being carried out in suspension in aromatic hydrocarbon solvents and in the presence of alkali metal hydroxide catalysts.
Claims8
In a process for the preparation of saccharose-hydroxyalkyl ethers by the alkoxylation of saccharose with alkylene oxides selected from the group consisting of ethylene oxide, propylene oxide and 1,2-butylene oxide at a temperature of 85.degree. to 130.degree.C and a pressure of 1.3 to 5.0 atmospheres the improvement comprising reacting the alkylene oxides with a mixture containing
- a. 100 parts by weight of saccharose,
- b. 2-5 parts by weight of water,
- c. 3-15 parts by weight of a low molecular weight higher valent alcohol, momoamine, or polyamine or any mixture of these wherein the alcohol, monoamine, or polyamine is water soluble, has a melting point below 100.degree.C and a molecular weight of between 60 and 250,
- d. 40-150 parts by weight of an aromatic hydrocarbon solvent, and
- e. 1-5 parts by weight of an alkali metal hydroxide, wherein said mixture is initially prepared at temperatures of between 20.degree. and 100.degree.C.
Dependencies are inferred from the claim text.