Abstract: The present invention relates to a process for preparing phosphites and their transition metal complexes and also to their use in catalytic processes.
Type:
Grant
Filed:
August 26, 2003
Date of Patent:
January 31, 2006
Assignee:
Bayer Aktiengesellschaft
Inventors:
Ulrich Scholz, Erasmus Vogl, Arne Gerlach, Jorma Hassfeld
Abstract: A process for the preparation of polymeric condensates, wherein the reaction mixture is fed at least once during the condensation reaction through a zone of high energy density which has an energy density of at least 105 J/m3.
Type:
Grant
Filed:
June 9, 2003
Date of Patent:
January 24, 2006
Assignee:
Bayer Aktiengesellschaft
Inventors:
Karlheinrich Meisel, Lars Obendorf, Branislav Boehmer, Bernd Thiele, Armin Spaniol, Dietmar Fuchs, Gerd-Friedrich Renner, Thomas Huebbe
Abstract: The present invention relates to a method of performing concentration determinations of aqueous solutions of polyaspartic acid and/or salts thereof.
Type:
Grant
Filed:
August 24, 2001
Date of Patent:
January 24, 2006
Inventors:
Thomas Klein, Thomas Klausa, Andreas Elschner, Ralf-Johann Moritz, Monika Cordes
Abstract: The invention relates to a novel conditioning agent based on polysuccinimide, its hydrolysates or its partial hydrolysates, for preventing deposits in standing or flowing water systems.
Type:
Grant
Filed:
August 23, 2001
Date of Patent:
January 17, 2006
Assignee:
Bayer Aktiengesellschaft
Inventors:
Hermann Sicius, Thomas Sildatke, Thomas Menzel, Wolfgang Wambach, Winfried Joentgen, Thomas Klausa, Thomas Klein
Abstract: The present invention relates to 5-nitrobenzofurans, to a process for preparing 5-nitrobenzofurans, and to 5-nitro-2,3-dihydrobenzofuran-3-ols, to a process for the preparation thereof and to intermediates.
Abstract: The present invention describes a process for preparing 4-amino-1-naphthol ethers which is characterized in that naphthol ethers are first prepared from 1-naphthols, the former are then converted to the corresponding 4-acetamino-1-naphthol ethers and then the acyl group is cleaved off, and further describes 4-acetamino-1-naphthol ethers obtained thereby.
Abstract: Polyhalogenated cinnamic acids and cinnamic acid derivatives are prepared by reacting diazonium salts accessible from polyhalogenated anilines with acrylic acid or acrylic acid derivatives in the presence of a homogeneous, palladium-containing catalyst at about ?5 to about +100° C. Some of the cinnamic acids and cinnamic acid derivatives obtainable in this way are new. Cinnamic acids and cinnamic acid derivatives which can be prepared according to the invention can be used for the preparation of indanones which are precursors for agro- and pharmaceutical chemicals and for substances having liquid-crystalline properties.
Type:
Grant
Filed:
February 12, 2002
Date of Patent:
October 18, 2005
Assignee:
Bayer Aktiengesellschaft
Inventors:
Walter Lange, Joachim Komoschinski, Markus Eckert, Michael Dockner
Abstract: The present invention is directed to a nitrile polymer vulcanizate having improved hot air aging characteristics. The nitrile polymer vulcanizate may be produced by admixing a composition containing: (i) a nitrile polymer; (ii) a filler; (iii) a metal salt of a secondary amine; (iv) a vulcanization system; and optionally (v) an additive selected from the group consisting of a strong base, a salt of a strong base and a weak acid, a salt of a weak acid, a carbodiimide, a polycarbodiimide and mixtures thereof.
Type:
Grant
Filed:
January 28, 2003
Date of Patent:
September 20, 2005
Assignee:
Bayer Inc.
Inventors:
Frederic Guerin, Judy Hannay, Ezio Campomizzi, Harald Bender
Abstract: The present invention relates to a process for decolorizing sugar juices by means of monodisperse ion exchangers, preferably anion exchangers, and the use of the same for sugar juice decolorization.
Type:
Grant
Filed:
November 9, 2001
Date of Patent:
September 13, 2005
Assignee:
Bayer Aktiengesellschaft
Inventors:
Hans-Karl Soest, Reinhold Klipper, Ulrich Schnegg, Martin Gladysch
Abstract: An optical recording medium having at least a recording layer 11 and a light transmitting layer 13 formed on a substrate 10, in which the recording layer 11 is made of an organic material for absorbing an incident light of wavelength of 360 nm to 460 nm, and inducing physical change or chemical change to vary the refractive index, the light transmitting layer 13 is 10 ?m to 177 ?m in thickness, the relation between absorption coefficient “k” and pyrolysis temperature Tdec of organic material is 950(° C.)<(Tdec (° C.)?20)/k<4100° C.??(1), and the absorption coefficient “k” is k>0.0.
Type:
Grant
Filed:
March 20, 2002
Date of Patent:
August 30, 2005
Assignees:
Sony Corporation, Bayer Aktiengesellschaft
Inventors:
Horst Berneth, Friedrich-Karl Bruder, Wilfried Haese, Rainer Hagen, Karin Hassenrück, Serguei Kostromine, Peter Landenberger, Rafael Oser, Thomas Sommermann, Josef-Walter Stawitz, Thomas Bieringer, Yuichi Sabi, Takashi Iwamura, Mitsuaki Oyamada, Hidetoshi Watanabe, Sakuya Tamada, Masanobu Yamamoto
Abstract: The present invention relates to a process for the preparation of 2-halo-6-nitrobenzoic acids by oxidation of 2-halo-6-nitro-benzyl alcohols, esters, ethers, or mixtures thereof with nitric acid and to the use of this process as a step in the preparation of 2-halo-6-nitrobenzoic acids from 2-halo-6-nitrotoluenes.
Abstract: The present invention relates to a process for preparing stereoisomerically enriched 4-aryl-4-hydroxybutanoic acid derivatives by reducing 4-aryl-4-ketobutanoic acid derivatives in the presence of ruthenium-containing catalysts.
Type:
Grant
Filed:
June 9, 2003
Date of Patent:
July 26, 2005
Assignee:
Bayer Aktiengesellschaft
Inventors:
Hans-Christian Militzer, Boris Bosch, Markus Eckert, Benjamin Meseguer
Abstract: The present invention relates to pyrazolylarylalkines and to their use, to a process for preparing pyrazolylarylalkines and also to intermediates.
Type:
Grant
Filed:
January 5, 2004
Date of Patent:
July 12, 2005
Assignee:
Bayer Chemicals Aktiengesellschaft
Inventors:
Wolfgang Ebenbeck, Florian Rampf, Albrecht Marhold
Abstract: The invention relates to a powdered thickener preparation based on polyurethane, which can be incorporated particularly well into water-based paints and lacquers and into other aqueous systems, and to their use as rheological additives for thickening preferably aqueous systems.
Type:
Grant
Filed:
March 6, 2002
Date of Patent:
July 12, 2005
Assignee:
Borchers GmbH
Inventors:
Peter Manshausen, Frank Sauer, Thomas Steinhoff, Jan Mazanek, Christian Wamprecht, Christel Spinger, Uwe Priesnitz, Peter Happe
Abstract: The invention relates to particulate solids comprising more than 90% by weight of natural or synthetic surface-active compounds for which a) the mean particle size of the particulate solid particles is 10 to 3000 ?m, b) the surface-active compounds are solid at room temperature, and c) the surface-active compounds have a melting point of from 25 to 250° C.
Abstract: The present invention relates to fluorinated benzaldehydes, to a process for preparing them and also to the use of the fluorinated benzaldehydes for preparing active ingredients, especially in medicaments and agrochemicals.
Abstract: The invention relates to novel mixtures of sulfuric esters and specific sulfuric esters that are useful as leveling agents for the dyeing of nitrogenous fiber materials and to a process for their preparation by reacting sulfuryl chloride with specific alcohols.
Abstract: The invention relates to a process for the continuous preparation of oleum of a concentration of 10 to 45% by weight of SO3 and/or sulphuric acid of a concentration of 94 to 100% by weight of H2SO4 by combustion of sulphur with atmospheric oxygen according to the principle of superstoichiometric combustion, cooling the resultant sulphur-dioxide-containing gases to 350° C. to 500° C., catalytic conversion of these cooled gases to give sulphur-trioxide-containing gases in the presence of a vanadium-containing catalyst using single or double contact catalysis, absorption of the sulphur-trioxide-containing gases after cooling, if appropriate removal of liquids from the gases after absorption and energy recovery, with liquid sulphur being injected into the hot combustion gas stream perpendicular to the main direction of flow in the form of a fan using one or more bimodal fan-type nozzles.
Type:
Grant
Filed:
August 29, 2002
Date of Patent:
May 17, 2005
Assignee:
Bayer Aktiengesellschaft
Inventors:
Kurt-Wilhelm Eichenhofer, Klaus-Peter Grabowski, Günter Dräger, Martin Kürten, Martin Schweitzer
Abstract: This invention relates to a process for polymerizing polar substituted norbornenes and/or cycloalkenes, optionally, in the presence of another unsaturated compound. The method is characterized in that the polymerization is carried out in the presence of one or more tungsten carbine complexes.
Type:
Grant
Filed:
March 19, 2001
Date of Patent:
May 10, 2005
Assignee:
Bayer Aktiengesellschaft
Inventors:
Karl-Heinz Alexsander Ostoja Starzewski, Karin Weiss, Martin Olaf Thüring
Abstract: The invention relates to an improved process for preparing 3-acyloxy-2-methylbenzoic acids by heating substituted naphthalenes in the presence of alkali metal hydroxides and subsequently acylating.
Type:
Grant
Filed:
June 10, 2003
Date of Patent:
May 10, 2005
Assignee:
BayerAktiengesellschaft
Inventors:
Johannes Scherer, Horst Behre, Friedrich Müller-Hauck