Hoechst Aktiengesellschaft

Clariant Corporation

Clariant Produkte (deutschland) Gmbh

Clariant Finance (bvi) Limited

Clariant International Ltd

Clariant Produkte Gmbh

Klaus Raab

Franz-Xaver Scherl

Olaf Wachsen

Andreas Gallas

Dirk Buehring

Peter Klug

Martin Glos

Hans-Matthias Deger

Matthias Beller

Konrad Von Werner

Holger Geissler

Hartmut Fischer

Sandra Bogdanovic

Franz Xaver Scherl

Rudolf Aigner

Gerhard Crass

Horst Robeck

Anton Probst

Sarah Werner

Walter Bender

Stefan Kreuzpointner

Karl Scheitzeneder

Martin Link

Guillermo Maier

Johanna Poschl

Ertan Akgün

Dirk BÜHRING

The invention relates to a method for preparing aqueous solutions of N,N-dimethylglucamine, characterized by first preparing an adduct of N-methylglucamine and formaldehyde in water at temperatures of between 15&#xb0; C. and 40&#xb0; C., and subsequently reacting said adduct to N,N-dimethylglucamine in the presence of a metal catalyst under hydrogen pressure at 20-68&#xb0; C., followed by secondary hydrogenation at 70-120 bar and 70-110&#xb0; C. once hydrogen absorption at 20-68&#xb0; C. is completed.

Catalytic process for preparing N,N-dimethylglucamine from N methylglucamine

The invention provides a process for preparing polyetheramines of the formula (1), R(NRR), in which n is a number from 1 to 20, Rrepresents an organic radical that contains between 2 and 600 oxalkylene groups, and Rand Rare alike or different and represent hydrogen or an organic radical having 1 to 400 carbon atoms, by combining a compound of the formula (2), H(NRR), with a compound of the formula (3), R(OH), in the presence of hydrogen with a metal-containing catalyst whose metal content, based on the dry, reduced catalyst excluding any support material that may be present, is composed either of at least 80% by mass of cobalt or, in the case of Raney catalysts, of at least 80% by mass of metals from the group consisting of cobalt and aluminium, the catalyst containing less than 5% by mass of copper.

Process for preparing polyetheramines

The invention relates to a method for producing amines of formula (1), wherein Ris an organic group containing from 2 to 600 alkoxy groups and Rand Rgroups are similar or different and represent a hydrogen atom or an organic group containing from 1 to 400 carbon atoms. The inventive method consists in bringing a compound of formula (2) into contact a compound of formula (3) in the presence of hydrogen with a metal-containing catalyst, wherein the metal content in cobalt is equal to or greater than 80% by weight.

Polyetheramine production method

The invention provides compounds preparable by the reaction of fluorous silanes (A)R&#x2014;CH&#x2014;CH&#x2014;SiX&#x2003;&#x2003;(A)where with one or more alcohols of the formula (B)R(OH)(NH)&#x2003;&#x2003;(B)where

Fluorosilane condensation products, their preparation and use for surface modification

Method for producing arylpoly(oxalkyl)-benzyldimethyl-ammonium derivatives

Antimicrobial siloxane quat formulations and their preparation and use

The present invention relates to a process for recovering the cobalt carbonyl catalyst used, in which a water-soluble cobalt salt is first prepared by addition of acid and this is subsequently precipitated as cobalt hydroxide. This cobalt hydroxide is then reacted with the N-acyl-.alpha.-amino acid derivative for whose preparation the cobalt carbonyl catalyst is intended, and the resulting cobalt-containing melt is converted into the cobalt carbonyl catalyst in the presence of a mixture of carbon monoxide and hydrogen.

Process for recovering cobalt carbonyl catalysts used in the preparation

Mixtures of perfluorinated alkyl bromides or alkylene dibromides containing perfluorinated iodine compounds are irradiated with electromagnetic radiation in the wavelength range from 230 to 500 nm and brought into contact, either during the irradiation or directly thereafter, with at least one of the following agents: active charcoal, certain finely divided metals, lower aliphatic alcohols, chlorine, bromine, oxygen, hydrogen peroxide, aqueous or alcoholic solutions of alkali metal compounds with certain inorganic anions or lower aliphatic alcohols. After removal of the agent and if appropriate distillation, products which contain less than 0.0005% by weight of iodine compounds and can be employed, for example, in the medical sector can be obtained.

Process for removing impurities from perfluorinated alkyl bromides or

A process for the preparation of substantially fluorinated alkyl bromides from the corresponding iodides is described. At least one anhydrous metal bromide, which can contain certain metals as the cation, is reacted at 80.degree. to 450.degree. C. under atmospheric pressure or the autogenous pressure of the reaction mixture and with good mixing, with the substantially fluorinated alkyl iodide, without the addition of other substances. The new process achieves good yields of substantially fluorinated alkyl bromides and requires no special safety precautions.

Process for preparation of substantially fluorinated alkyl bromides

The invention relates to an azeotrope-type mixture which contains about 3-5% by weight of methanol and about 95-97% by weight of 1,4-dihydroperfluorobutane, and also to a process for cleaning electronic components, in particular soldered conductor boards or printed circuits, with the aid of said mixture.

Novel azeotrope-type solvent mixture of methanol and

A process for the preparation of extensively fluorinated alkyl bromides from the corresponding iodides is described in which, in a dipolar aprotic solvent, a bromide which is present as a salt of an alkali metal, alkaline earth metal, copper or substituted or unsubstituted amonium is reacted with an extensively fluorinated alkyl iodide at 120.degree. to 200.degree. C. The reaction can be carried out at -10.degree. to +120.degree. C., in some cases with improved yields if it is carried out in the presence of an alkali metal salt of at least one hydroxyalkanesulfinic acid having 1 to 5 carbon atoms. The novel process enables uncomplicated apparatuses to be used without particular safety measures and presents no corrosion problems.

Process for the preparation of extensively fluorinated alkyl bromides

Novel polyfluorinated cyclic carbonates of the formula ##STR1## in which R.sub.F is an unbranched or branched perfluoroalkyl radical having 1 to 18 carbon atoms, an unbranched or branched .omega.-hydro- or .omega.-haloperfluoroalkyl radical having 1 to 18 carbon atoms, or a cycloperfluoroalkyl radical having 4 to 6 carbon atoms, are described. They are prepared by reacting a polyfluorinated halohydrin of the formula R.sub.F --CH.sub.2 --CH(Hal)--CH.sub.2 OH, in which R.sub.f has the meaning mentioned and Hal represents a halogen, with carbonate or hydrogen carbonate compounds in the presence of an aprotic solvent. The novel compounds, which are generally solid and crystalline at room temperature, represent, in particular, good waterproofing and oil-proofing agents for textiles.

Polyfluorinated cyclic carbonates

New processes for the preparation of 2-iodo-perfluoro-2-methyl-butane and the corresponding -pentane are described. In one process, perfluoro-2-methyl-2-butene or the corresponding -pentene is reacted in an amount of at least 5 mol with a mixture of 2 mol of iodine and 1 mol of iodine pentafluoride in the presence of more than 1 mol of at least one fluoride of a metal of group I of the periodic table of the elements under the autogenous pressure of the reaction mixture at 170.degree. to 220.degree. C. for 2 to 30 hours. In another process, the same perfluoroolefins are reacted, as the starting substances, with iodine and an alkali metal fluoride in the presence of at least 1 mol of a soluble silver salt per mole of the perfluorinated olefin at 20.degree. to 100.degree. C. for 0.5 to 10 hours. After working up by distillation, the pure iodoperfluoroalkanes are obtained. They are suitable for numerous reactions, but in particular as a packing for lasers.

2-iodo-perfluoro-2-methylalkanes, processes for their preparation and

In a novel process for the preparation of perfluoroalkylalkenols, perfluoroalkylhalohydrins are dehydrohalogenated using specific ionic bases, namely using an alkali metal carbonate, an alkali metal hydrogen carbonate or an alkylammonium hydrogen carbonate, in the presence of aprotic and polar solvents. Using this process, high yields of the intended perfluoroalkylalkenols are achieved and only very small amounts, if any at all, of undesired byproducts, such as partially fluorinated ether alcohols and/or partially fluorinated epoxides, are formed.

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Burgkirchen, Germany

Klaus Raab