Basf Aktiengesellschaft

Basf Se Corporation

Dietmar Weller

Manfred Stroezel

Hagen Jaedicke

Heinz Etzrodt

Carsten Oost

Gerd Kaibel

Udo Rheude

Bernhard Bockstiegel

Klaus Reimer

Thomas Krug

Luise Spiske

Lothar Laupichler

Andreas Habich

Ulrich H&ouml;rcher

York Hartleben

Ulrich Horcher

A process is described for producing adsorbates suitable for human or animal nutrition and also cosmetics applications in which a component (A) to be adsorbed is applied to a carrier (C) using at least one stabilizer (B), the mean particle size of the carrier (C) being at least 80 &#x3bc;m, with the proviso that, if the component (A) to be adsorbed is vitamin E, the mixture of (A) and (B) has an HLB value less than 7, and also with the proviso that if the component (A) to be adsorbed is an oil-soluble vitamin and the stabilizer (B) is a glyceride, the freezing point of the mixture of (A) and (B) is below or equal to 80&#xb0; C. A description is also given of the use of the adsorbates which are thus obtainable.

Adsorbates containing active substances

Process for the continuous preparation of unsaturated ketones of the formula I

Continuous preparation of unsaturated ketones

Process for preparing unsaturated ketones

Process for preparing higher unsaturated ketones

Process for the continuous preparation of &agr;- and/or &bgr;-ionone or homologous compounds using concentrated sulfuric acid at temperatures from 20 to 90&deg; C., in the presence of organic solvents or diluents with cooling and by subsequent termination of the reaction by hydrolysis of the reaction mixture with water or dilute sulfuric acid, wherein both the cyclization of pseudoionones and the subsequent hydrolysis of the reaction mixture are carried out in a virtually adiabatic reaction in one or more reaction mixing pump(s) which are connected in series and each of which consists essentially of a rotationally symmetrical mixing chamber formed from a peripheral wall and two end walls and of a mixing rotor made of material inert to sulfuric acid and with rotational drive, where the mixing chamber has at least one inlet opening for each component and one outlet opening for the reaction mixture, and annular channels in fluid connection to one another in the end walls, and wherein the heat of the two reactions is in each case partly or wholly removed with the aid of a downstream heat exchanger.

Process for preparing ionones

A process for preparing .gamma.,.delta.-unsaturated ketones of the general formula I ##STR1## by reacting an allyl alcohol of the general formula II ##STR2## in which R.sup.1 is H or a hydrocarbon radical having 1 to 20 carbon atoms, with diketene or an alkyl acetoacetate of the general formula III ##STR3## in which R.sup.2 is alkyl having 1 to 4 carbon atoms in an unmodified or modified Carroll reaction in the presence of an aluminum catalyst, wherein aluminum compounds which are stable liquids at room temperature, or a mixture of such aluminum compounds, which comprise at least one radical formed from an alkyl acetoacetate and 1 or 2 alkoxy radicals, or else comprise exclusively radicals formed from alkyl acetoacetates, which are esterified with sec-butanol or isobutanol, or else are esterified with at least two different alcohols, are used as aluminum catalyst. Also claimed are the novel mixtures of aluminum compounds which comprise radicals which are formed exclusively from alkyl acetoacetates and are esterified with at least two different alkanols, and the batchwise and continuous preparation of the liquid aluminum catalysts.

Preparation of .gamma.,.delta.-unsaturated ketones by the Carroll

A process for preparing .gamma.,.delta.-unsaturated ketones by

Preparation of .gamma., .delta.-unsaturated ketones by the carroll

Growing community of inventors

Ludwigshafen, Germany

Dietmar Weller