Henkel Kommanditgesellschaft Auf Aktien

Staley Continental, Inc.

Patrick M McCurry

Carl E Pickens

Robert S McDaniel, Jr

Paul R Glor

Rolland W Short

Hunter L Kickle

John F Rasche

Prasad S Ravi

William Kozak

David J Skogberg

A process for preparing glycosides from a source of saccharide moiety and an alcohol in the presence of a hydrophobic acid catalyst is provided. An example of such a catalyst is dinonylnaphthalenemonosulfonic acid. The use of such catalysts provides a number of process advantages, which includes the reduced production of polar by-products. Preferred glycosides produced by the process are higher alkyl glycosides useful as surfactants.

Process for production of glycosides

Undesired hydrophilic materials are readily removed from long chain hydrophobic alcohols, from long chain hydrophobic alcohol/glycoside surfactant mixtures and from solutions of glycoside surfactants in water immiscible solvents resulting from dissolving the glycoside surfactants in said solvents or mixing aqueous mixtures of glycoside surfactants with said solvents, by contacting the hydrophilic material containing hydrophobic composition with water in an amount, and for a time period sufficient, to extract at least a portion of the hydrophilic material from the hydrophobic composition and to form a separate aqueous phase and by separating the resulting aqueous phase from the hydrophobic composition. The process is particularly useful when employed in the context of a glycoside surfactant manufacturing process to remove polysaccharide by-products from a crude unreacted hydrophobic alcohol/glycoside surfactant reaction product mixture at a stage prior to the separation of the hydrophobic alcohol from the glycoside surfactant.

Removal of water miscible materials from glycoside mixtures

Glycoside products having a propensity to discolor (i.e., darken) under aqueous alkaline conditions are stabilized against discoloration under such conditions by treatment with from about 0.01 to about 2 weight percent (glycoside product dry weight basis) of a borohydride material such as sodium borohydride, potassium borohydride, lithium borohydride, etc.

Color stabilization method for glycoside products

A process for preparing alkylglycosides by reacting an 8 to 20 carbon atom monohydric alcohol with a monosaccharide in the presence of an acid catalyst, while under partial vacuum, followed by neutralizing the reactant product with an alkaline metal hydroxide in an amount about equal on a molar basis to the amount of catalyst, and removal of the residual unreacted alcohol.

Process for preparation of alkylglycosides

The invention is a process for preparing a glycoside product by reacting an alcohol having 4 to 30 carbon atoms with a saccharide or oligosaccharide in the presence of an acid catalyst wherein an undissolved phase comprising the saccharide or oligosaccharide is present in the reaction mixture during the process.

Process for the direct production of glysoside product in the presence

The catalytic hydrogenation of a glycoside composition to reduce the color of the composition is disclosed.

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Decatur, IL, United States of America

Patrick M McCurry