Wacker Chemie Ag

Benno Krueger

Gerald Fleischmann

Hermann Petersen

Stefan Neumann

Wolfgang Doering

The invention relates to a process for preparing chloroacetaldehyde acetals of monohydric, dihydric or higher-functionality aliphatic alcohols, in which the chloroacetaldehyde acetal is obtained from an aqueous chloroacetaldehyde solution in the presence of the alcohol to be acetalized and an acid catalyst by azeotropic removal of water with the aid of a solvent, wherein the solvent is a halogenated solvent.

Process for preparing chloroacetaldehyde acetals

The invention relates to a safely handleable and transportable composition including an alpha-cyclodextrin-chlorine dioxide complex and an inert substance, and also a method for production thereof.

Composition comprising an alpha-cyclodextrin-chlorine dioxide complex and  an inert substance, and also method for production thereof

A process for preparing hydroxytyrosol, wherein a compound where X is CHOH or CHOM (M=Li, Na, K, Mg, Ca), Rand Rare identical or different and are C1-C8 alkyl radical, benzyl radical, alkyl- or halogen-substituted benzyl radical or arylalkyl radical, where Rand Rcan also be linked via to give a ring, R, R, Rand Rare identical or different and are hydrogen or C1-C6 alkyl radical, aryl radical, alkyl-substituted aryl radical, where Rand Rcan also be linked via &#x2014;(CH)&#x2014;, &#x2014;(CH)&#x2014; or &#x2014;(CH)&#x2014; to give a ring, is reacted with an aluminum compound AlRRR(2), where R, Rand Rare identical or different and are H or C1-C8 alkyl radical, and then an aqueous solution of a hydroxycarboxylic acid is added to form a clear homogeneous acidic solution with a pH&#x3c;3, and hydroxytyrosol is extracted therefrom.

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Burgkirchen, Germany

Benno Krueger