Synthesis of monoethers of sugar comprising a long alkyl chain and uses thereof as a surfactant
First Claim
1. A process for obtaining a mixture of C4-C8 alkyl monoether of saccharide and/or of saccharide derivative and of C9-C18 alkyl monoether of saccharide and/or of saccharide derivative, said saccharide derivative being a glycosylated and/or hydrogenated and/or dehydrated saccharide, said process comprising:
- a) a first step of acetalization or trans-acetalization of a saccharide, of saccharide derivative or of mixtures thereof with a C4-C8 aliphatic aldehyde or the acetal thereof,b) a second consecutive or simultaneous step of acetalization or trans-acetalization of the product obtained in a), of the saccharide, of the saccharide derivative or of mixtures thereof, with a C9 to C 18 aliphatic aldehyde or the acetal thereof,c) a step of catalytic hydrogenolysis of the acetals of saccharide and/or of saccharide derivative obtained in b), andd) a step of recovery of a mixture of C4-C8 alkyl monoether of saccharide and/or of saccharide derivative and of C9-C18 alkyl monoether of saccharide and/or of saccharide derivative.
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Abstract
A process for obtaining a mixture of C4-C8 and C9-C18 alkyl monoether of saccharide, comprising: a) a first step of acetalization or trans-acetalization of a saccharide or of a mixture of saccharides with a C4-C8 aliphatic aldehyde or the acetal thereof, b) a second consecutive or simultaneous step of acetalization or trans-acetalization of the product obtained in a) of the saccharide or mixture of saccharides with a C9-C18 aliphatic aldehyde or the acetal thereof, c) a step of catalytic hydrogenolysis of the saccharide acetals obtained, and d) a step of recovery of a mixture of C4-C8 and C9-C18 alkyl saccharide monoethers. The invention further relates to a mixture of C4-C8 and C9-C18 alkyl saccharide monoethers and the use thereof as a surfactant.
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Citations
20 Claims
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1. A process for obtaining a mixture of C4-C8 alkyl monoether of saccharide and/or of saccharide derivative and of C9-C18 alkyl monoether of saccharide and/or of saccharide derivative, said saccharide derivative being a glycosylated and/or hydrogenated and/or dehydrated saccharide, said process comprising:
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a) a first step of acetalization or trans-acetalization of a saccharide, of saccharide derivative or of mixtures thereof with a C4-C8 aliphatic aldehyde or the acetal thereof, b) a second consecutive or simultaneous step of acetalization or trans-acetalization of the product obtained in a), of the saccharide, of the saccharide derivative or of mixtures thereof, with a C9 to C 18 aliphatic aldehyde or the acetal thereof, c) a step of catalytic hydrogenolysis of the acetals of saccharide and/or of saccharide derivative obtained in b), and d) a step of recovery of a mixture of C4-C8 alkyl monoether of saccharide and/or of saccharide derivative and of C9-C18 alkyl monoether of saccharide and/or of saccharide derivative. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 15)
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- 12. A composition comprising a mixture of positional isomers of C4-C8 alkyl monoether of saccharide or of saccharide derivative and of positional isomers of C9-C18 alkyl monoether of saccharide or of saccharide derivative, in which the saccharide derivative is a glycosylated and/or hydrogenated and/or dehydrated saccharide, and the saccharide is a hexose.
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17. A method for reducing the surface tension of a liquid, said method comprising:
contacting a liquid with; a composition comprising a mixture of C4-C8 alkyl monoether of saccharide and/or of saccharide derivative and of C9-C18 alkyl monoether of saccharide and/or of saccharide derivative, or a composition comprising a mixture of positional isomers of C4-C8 alkyl monoether of saccharide or of saccharide derivative and of positional isomers of C9-C18 alkyl monoether of saccharide or of saccharide derivative, in which the saccharide derivative is a glycosylated and/or hydrogenated and/or dehydrated saccharide, and the saccharide is a hexose, or a mixture of C4-C8 alkyl monoether of saccharide and/or of saccharide derivative and of C9-C18 alkyl monoether of saccharide and/or of saccharide derivative, said saccharide derivative being a glycosylated and/or hydrogenated and/or dehydrated saccharide, obtained by a process comprising; a) a first step of acetalization or trans-acetalization of a saccharide, of saccharide derivative or of mixtures thereof with a C4-C8 aliphatic aldehyde or the acetal thereof, b) a second consecutive or simultaneous step of acetalization or trans-acetalization of the product obtained in a), of the saccharide, of the saccharide derivative or of mixtures thereof, with a C9 to C 18 aliphatic aldehyde or the acetal thereof, c) a step of catalytic hydrogenolysis of the acetals of saccharide and/or of saccharide derivative obtained in b), and d) a step of recovery of the mixture of C4-C8 alkyl monoether of saccharide and/or of saccharide derivative and of C9-C18 alkyl monoether of saccharide and/or of saccharide derivative. - View Dependent Claims (18, 19)
Specification