Degussa Aktiengesellschaft

Degussa-h{umlaut Over (u)}ls Aktiengesellschaft

Elfriede Sextl

Akos Kiss

Sems Yonsel

Heike Kinz

Peter K Kleinschmit

Eckehart Roland

Stefan Stockhammer

Wiltrud Schafer-Treffenfeldt

Karlheinz Drauz

Mario Scholz

Gunter Knaup

Gerard Richet

Tien Le Quang

Wiltrud Schaffer-Treffenfeldt

Gerhard Zimmer

Wiltrud Schaefer-Treffenfeldt

Disclosed is a method for the purification of exhaust air and/or effluents, which may be exhausted, for example, from auto painting units or furniture lacquering units, involving contacting the air and/or effluents with a molded body. The molded body is made from dealuminated zeolite Y and at least one binder, which may be, for example, bentonites, kaolins, sepiolites or attapulgites, and having a hydrophobic factor of from 1.5 to 6.0, wherein a slurry of the binder in water does not exceed a pH of 10 and wherein the molded body is calcined at 850&deg; to 1100&deg; C. The molded body is produced by a process involving mixing pulverulent dealuminated zeolite Y with at least one binder, optionally with the addition of a lubricant and/or a pore former, and optionally with water or an organic solvent, moulding the resulting mass to form a molded body, and drying and calcining the molded bodies.

Method for the purification of exhaust air and/or effluents by contact with moulded bodies containing dealuminated zeolite Y

The invention relates to a process for removing amino acids and/or aminosulphonic acids from preferably aqueous solutions which contain these as impurities by adsorbing the amino acids on zeolites. Solutions to which the process according to the invention can be applied are produced, for example, from the industrial synthesis of oligopeptides in which the amino acids serving as starting materials are always present in solution, sometimes to a not inconsiderable residual concentration, together with the desired end product.

Process for separating amino acids and aminosulponic acids through

The invention relates to the removal of hydroxymonocarboxylic acids and tricarboxylic acids from aqueous solutions by adsorption on zeolites with a modulus of up to 400.

Process for isolating hydroxymonocarboxylic and tricarboxylic acids

A process for the isolation of L-leucine and L-isoleucine from an aqueous solution containing these amino acids and their separation from each other by contacting the solution with a zeolite under acid conditions.

Process of the isolation of L-leucine and L-isoleucine from aqueous

Aqueous hydrogen peroxide solutions contain variable amounts of carbon compounds following their production by the so-called anthraquinone process. Various methods are known for separating out carbon compounds, including those using organic ion exchangers or macro-porous organic adsorber resins. Described is a process using a solid adsorption agent, which can be regenerated without causing any problems, whereby the carbon content is reduced. The solid adsorption agent is a zeolite from the set of dealuminised H-Y-zeolites with a (SiO.sub.2 /Al.sub.2 O.sub.3) ratio equal to or greater than 20 or H-mordenites with a (SiO.sub.2 /A1.sub.2 O.sub.3) ratio of at least 20.

Process for reducing the carbon content of aqueous hydrogen peroxide

A process for the production of moulded bodies from dealuminated Y-zeolite (SiO.sub.2 /Al.sub.2 O.sub.3 &gt;20) in which the microporous system of the zeolites and its characteristic adsorption properties are preserved and a binder whose slurry in water does not exceed a pH of 10 used in quantities of from 2 to 40%, based on the quantity of zeolite mass put into the process.

Molded bodies containing dealuminated zeolite Y and the process for

A process for the separation of amino acids from aqueous solutions by adsorption on zeolites of different types. It is unnecessary to separate the biomass prior to the treatment.

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Geiselbach, Germany

Elfriede Sextl