Patents Assigned to RWE-DEA Aktiengesellschaft fur Mineraloel und Chemie
-
Patent number: 6887398Abstract: Compositions containing aluminum trisalkylacetoacetate compounds and glycol ether and to a method for the production and use thereof, particularly as printing ink additives.Type: GrantFiled: September 25, 1998Date of Patent: May 3, 2005Assignee: RWE-DEA Aktiengesellschaft fur Mineraloel und ChemieInventors: Peter Finmans, Christina Diblitz
-
Patent number: 6380439Abstract: A single-stage method for producing &agr;-hydroxy ethers by oxidizing olefinic substrates with organic hydroperoxides and opening the resultant oxirane ring by means of monovalent or polyvalent alcohols wherein a molybdenum compound in combination with a compound selected from the group consisting of boron trifluoride, aluminum oxides, 1,8-diazabicyclo-[5.4.0]-undec-7-ene or 1,4-diazabicyclo-[2.2.2]-octane, and mixtures thereof is used as a catalyst system.Type: GrantFiled: January 25, 2000Date of Patent: April 30, 2002Assignee: RWE-DEA Aktiengesellschaft fur Mineraloel und ChemieInventors: Mark RĂ¼sch gen. Klaas, Siegfried Warwel, Hans-Martin Zillmann, Klaus Kwetkat
-
Patent number: 6180764Abstract: A process for producing high-purity hydrotalcites by reacting alcohols or alcohol mixtures with at least one or more divalent metal(s) and at least one or more trivalent metal(s) and hydrolysing the resultant alcoholate mixture with water. The corresponding metal oxides can be produced by calcination.Type: GrantFiled: April 30, 1999Date of Patent: January 30, 2001Assignee: RWE-DEA Aktiengesellschaft fur Mineraloel und ChemieInventors: Klaus Noweck, Klaus Diblitz, Jan Sohiefler, Andrea Brasch
-
Patent number: 6069261Abstract: A process carried out in a reaction column for the chemical reaction of substances the reaction of which is affected by an unfavorable equilibrium position of the main reaction or a preceding equilibrium, wherein during the reaction one or more substances to be separated are continuously removed from the reaction mixture by one or more auxiliaries.Type: GrantFiled: May 4, 1998Date of Patent: May 30, 2000Assignee: RWE-DEA Aktiengesellschaft fur Mineraloel und ChemieInventors: Ulrich Hoffmann, Ulrich Kunz
-
Patent number: 6030599Abstract: A process for producing alumina hydrates having a boehmite structure is provided. These alumina hydrates are dispersible in water. The boehmite or pseudoboehmite in colloids having a pH value of between 3 and 7 is present in a nanocrystalline form (<4 nm) whereby an exceptionally high translucence is imparted to the colloid.Type: GrantFiled: May 3, 1996Date of Patent: February 29, 2000Assignee: RWE-DEA Aktiengesellschaft fur Mineraloel und ChemieInventors: Klaus Noweck, Jurgen Schimanski, Arnold Meyer
-
Patent number: 5883272Abstract: Rhenium oxide catalysts carried on aluminium silicates, if required with added boric oxide, tungsten oxide, molybdenum oxide or vanadium oxide for the metathesis of olefins and functionalised olefins, in particular of carboxylic acid esters, are provided, whereby the carrier material was hydrothermally treated.Type: GrantFiled: June 20, 1997Date of Patent: March 16, 1999Assignee: RWE-DEA Aktiengesellschaft fur Mineraloel und ChemieInventors: Klaus Noweck, Andreas Hoffmann
-
Patent number: 5859269Abstract: A process for the continuous production of monocarboxylic acids from the corresponding alcohols by alkali fusion wherein the oxidation is continuously accomplished in an extrusion reactor without addition of diluents and the alkali salts of the monocarboxylic acids are discharged from the reactor as a solid product and are directly neutralised with mineral acids. High-purity monocarboxylic acids are obtained after phase separation.Type: GrantFiled: June 14, 1996Date of Patent: January 12, 1999Assignee: RWE-DEA Aktiengesellschaft fur Mineraloel und ChemieInventors: Albert Thomas Herrmann, Arnold Meyer, Erich Scherf, Clemens Schroder, Ansgar Reichenauer, Ernst Tonsen
-
Patent number: 5830833Abstract: Lubricants for refrigeration equipment operating with fluorocarbons as refrigerants are produced by esterification of at least one neopolyol type polyhydric alcohol with an acid component comprising 60 to 80 mol percent n-pentanoic acid, from about 40 to about 10 mol percent of at least one straight chain C.sub.6 to C.sub.10 monocarboxylic acid and from about 0 to about 30 mol percent C.sub.6 to C.sub.10 branched chain monocarboxylic acid. The resulting esters are suitable for use without lubricating oil additives.Type: GrantFiled: April 10, 1995Date of Patent: November 3, 1998Assignee: RWE-DEA Aktiengesellschaft fur Mineraloel und Chemie and Texaco Deutschland GmbHInventors: Hans Dieter Grasshoff, Vladislav Synek, Harald Kohnz
-
Patent number: 5808158Abstract: A process for producing primary amines which comprises reacting primary alcohols branched in position 2 with ammonia in the presence of a metal catalyst/co-catalyst.Type: GrantFiled: May 9, 1996Date of Patent: September 15, 1998Assignee: RWE-DEA Aktiengesellschaft fur Mineraloel und ChemieInventors: Martin Conrads, Albert Thomas Hermann, Erich Scherf, Arwed Wagner
-
Patent number: 5800731Abstract: Homogeneous, electro-viscous fluids are provided which contain aluminum soaps based on products obtained by reacting one or more mono- or polycarboxylic acid(s) or the anhydrides or semi-esters thereof with reactive aluminum compounds, such as aluminum alcoholates. The aforesaid fluids manifest high electro-rheological effect and are completely homogeneous, and do not require a dispersant.Type: GrantFiled: June 11, 1996Date of Patent: September 1, 1998Assignee: RWE-DEA Aktiengesellschaft fur Mineraloel und ChemieInventors: Dietrich Pirck, Hans-Dieter Grasshoff, Harald Kohnz, Peter Finmans, Tobias Carstensen, Dieter Jakubik, Wilfried Weber, Dieter Winkler
-
Patent number: 5681916Abstract: Urea-modified, highly reactive phenolic resins useful as center-layer bonding agents in the manufacture of particleboard are provided by condensing phenol and formaldehyde until shortly before gelation takes place such that, after addition of urea, relatively low-alkaline, urea-modified phenolic resins are obtained which my optionally be stored and to which, shortly before processing them into glues for center-layer particles, alkali is added in sufficient quantities to ensure rapid cross-linking of the phenolic resin.Type: GrantFiled: June 29, 1995Date of Patent: October 28, 1997Assignee: RWE-DEA Aktiengesellschaft fur Mineraloel und ChemieInventors: Adolf Buschfeld, Matthias Lattekamp, Manfred Gramse, Hans-Jurgen Krezmin
-
Patent number: 5474714Abstract: The present invention relates to hydraulic fluids which are particularly intended for shock absorption and level controlling applications in vehicles. Hydraulic fluids are provided which substantially consist of esterification products of monosaturated fatty acids and 2-alkyl-1-alkanols. The claimed fluids comply with the requirements made on industrial hydraulic media and are particularly outstanding by their good biodegradability.Type: GrantFiled: July 22, 1994Date of Patent: December 12, 1995Assignee: RWE-DEA Aktiengesellschaft fur Mineraloel und ChemieInventors: Dietrich Pirck, Hans-Dieter Grasshoff
-
Patent number: 5011886Abstract: The inventive concept is to condense the phenol formaldehyde resins to a higher molecular weight than usual so far. Subsequent addition of urea thereto reduces viscosity to normal levels and increases solid content.The added urea does not take part in condensation reaction but partly reacts in the alkaline medium with formaldehyde to methylol urea (in a so called equilibrium reaction), which is formaldehyde donor for the phenol formaldehyde crosslinking reaction during the pressing of the particle board.The present invention relates to a process for producing modified phenolic resin bonding agents, characterized by preparing as known per se phenol-formaldehyde resins with a viscosity of more than 300 mPa.s (at 20.degree. C.Type: GrantFiled: February 26, 1990Date of Patent: April 30, 1991Assignee: Rwe-Dea Aktiengesellschaft fur Mineraloel und ChemieInventors: Adolf Buschfeld, Matthias Lattekamp, Gerd Ripkens, Hans Schittek