Patents by Inventor Birgit Bertsch-Frank
Birgit Bertsch-Frank has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7332139Abstract: Reactions between at least two fluid reactants are performed in a reactor comprising wall elements (1), slot-shaped reaction spaces (3) and cavities (5) for conducting a fluid heat-carrier through. Depending on the process and throughput, a modular structural design is chosen wherein an arbitrary number of wall elements (1) are assembled to a right-parallelepipedal block (24), the reaction spaces (3) are formed between lateral surfaces (2) of right-parallelepipedal wall elements (1), the reactants are introduced into the reaction spaces (3) from edge regions of one side of the block (24) and are conducted through the reaction spaces (3) in parallel flows and the fluid heat-carrier is conducted through the tubular cavities (5) extending in the interior of the wall elements (1).Type: GrantFiled: August 22, 2001Date of Patent: February 19, 2008Assignee: Degussa AGInventors: Rüdiger Schütte, Torsten Balduf, Catrin Becker, Ina Hemme, Birgit Bertsch-Frank, Werner Wildner, Jürgen Rollmann, Georg Markowz
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Patent number: 7041267Abstract: The invention relates to a process for the production, by fluid-bed spray granulation, of granular sodium percarbonate having a low TAM value. According to the invention, in the fluid-bed spray granulation, an Mg compound in a quantity of 50 to 2,000 ppm, in particular 100 to 1,000 ppm, or/and a complexing agent from among the hydroxycarboxylic acids, aminocarboxylic acids, aminophosphonic acids and phosphonocarboxylic acids, hydroxyphosphonic acids and their alkali metal salts, ammonium salts or Mg salts, in a quantity of 50 to 2,000 ppm, in particular 200 to 1,000 ppm, are added as stabilisers to the soda solution and/or H2O2 solution. Preferably a combination of an Mg compound in a quantity of 100 to 1,000 ppm Mg2+ and waterglass in a quantity of 0.1 to 1 wt. %, in particular 0.1 to 0.5 wt. %, is used, and in this case granules having a TAM value of about or below 6 ?W/g and simultaneously a short dissolving time, are obtainable.Type: GrantFiled: September 25, 2001Date of Patent: May 9, 2006Assignee: Degussa AGInventors: Harald Jakob, Birgit Bertsch-Frank
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Patent number: 6387346Abstract: A process for the direct synthesis of hydrogen peroxide from hydrogen and oxygen is carried out in the presence of a noble metal catalyst. The selectivity for H2 and/or the maximum H2O2 concentration can be increased by using a catalyst of palladium or at least two metals selected from Group VIII and Group I of the Periodic Table of Elements, which catalyst has been produced by spray pyrolysis or flame pyrolysis.Type: GrantFiled: March 20, 2000Date of Patent: May 14, 2002Assignee: Degussa-Huls AGInventors: Birgit Bertsch-Frank, Ina Hemme, Lukas Von Hoppel, Stipan Katusic, Jürgen Rollmann
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Publication number: 20020041843Abstract: The invention relates to a process for the production, by fluid-bed spray granulation, of granular sodium percarbonate having a low TAM value. According to the invention, in the fluid-bed spray granulation, an Mg compound in a quantity of 50 to 2,000 ppm, in particular 100 to 1,000 ppm, or/and a complexing agent from among the hydroxycarboxylic acids, aminocarboxylic acids, aminophosphonic acids and phosphonocarboxylic acids, hydroxyphosphonic acids and their alkali metal salts, ammonium salts or Mg salts, in a quantity of 50 to 2,000 ppm, in particular 200 to 1,000 ppm, are added as stabilisers to the soda solution and/or H2O2 solution. Preferably a combination of an Mg compound in a quantity of 100 to 1,000 ppm Mg2+ and waterglass in a quantity of 0.1 to 1 wt.%, in particular 0.1 to 0.5 wt.%, is used, and in this case granules having a TAM value of about or below 6 &mgr;W/g and simultaneously a short dissolving time, are obtainable.Type: ApplicationFiled: September 25, 2001Publication date: April 11, 2002Inventors: Harald Jakob, Birgit Bertsch-Frank
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Publication number: 20020028164Abstract: Reactions between at least two fluid reactants are performed in a reactor comprising wall elements (1), slot-shaped reaction spaces (3) and cavities (5) for conducting a fluid heatcarrier through. Depending on the process and throughput, a modular structural design is chosen wherein an arbitrary number of wall elements (1) are assembled to a right-parallelepipedal block (24), the reaction spaces (3) are formed between lateral surfaces (2) of right-parallelepipedal wall elements (1), the reactants are introduced into the reaction spaces (3) from edge regions of one side of the block (24) and are conducted through the reaction spaces (3) in parallel flows and the fluid heat-carrier is conducted through the tubular cavities (5) extending in the interior of the wall elements (1).Type: ApplicationFiled: August 22, 2001Publication date: March 7, 2002Inventors: Rudiger Schutte, Torsten Balduf, Catrin Becker, Ina Hemme, Birgit Bertsch-Frank, Werner Wildner, Jurgen Rollmann, Georg Markowz
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Publication number: 20010024634Abstract: The invention is relative to a method of producing hydrogen peroxide by direct synthesis in which hydrogen and oxygen are reacted in the presence of a heterogeneous, carrier-free or carrier-bound catalyst containing at least one noble metal in the presence or absence of a solvent and to a catalyst for carrying out the method.Type: ApplicationFiled: February 26, 2001Publication date: September 27, 2001Inventors: Birgit Bertsch-Frank, Ina Hemme, Jurgen Rollmann, Stipan Katusic, Torsten Balduf, Catrin D. Becker, Werner Wildner, Rudiger Schutte
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Patent number: 6290775Abstract: The invention relates to a fluidized bed reactor for the continuous production of fluidized bed granules. The reactor is characterized by a discharge device designed as a siphon pipe or siphon weir. The fluidized bed reactor permits a trouble-free continuous operation of the fluidized bed stage and of a connected, continuous subsequent stage. A preferred fluidized bed reactor comprises two chambers that are in communication via the discharge device according to the invention.Type: GrantFiled: February 25, 1999Date of Patent: September 18, 2001Assignee: Degussa AGInventors: Rainer Kohlen, Lothar Kaiser, Alexander Ruhs, Birgit Bertsch-Frank
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Patent number: 6239095Abstract: A process for the preparation of coated peroxygen compounds, in particular sodium percarbonate, by fluidized bed coating. By using a fluidized bed reactor with a radial inflow base, the passage openings of which allow the fluidized bed gas to emerge in the region of the opening at an angle of less than 35°, measured with respect to the horizontal, in the form of directed part streams, and in which are arranged spray nozzles, the pulse of which points in the same direction as the pulse of the fluidizing gas, it is possible to obtain products with an increased active oxygen stability. A circular reactor, the inflow base of which has lamellae overlapping like turbine blades and nozzles aligned in the direction of rotation of the fluidized bed is preferred.Type: GrantFiled: July 6, 1999Date of Patent: May 29, 2001Assignee: Degussa-Huls AktiengesellschaftInventors: Birgit Bertsch-Frank, Martin Bewersdorf, Lothar Kaiser, Rainer Kohlen, Ralph Overdick, Michael Scheibe
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Patent number: 6117409Abstract: An aqueous solution of hydrogen peroxide is produced by direct synthesis from hydrogen and oxygen in the presence of a heterogeneous catalyst. According to the invention, a gas mixture comprising H.sub.2 and O.sub.2, essentially saturated or supersaturated with water (=containing fog) is fed into a reactor containing the catalyst. The volume ratio of the gas mixture fed in (standard liters per hour) to liquid removed (liters per hour) is adjusted to a value equal to or greater than 15,000, especially 20,000 to 50,000, and the gas mixture leaving the reactor is recycled after replenishment with H.sub.2, O.sub.2, and H.sub.2 O vapor. Solutions with high H.sub.2 O.sub.2 concentration can be obtained according to the invention without additional concentration.Type: GrantFiled: April 12, 1999Date of Patent: September 12, 2000Assignee: Degussa-Huls AktiengesellschaftInventors: Birgit Bertsch-Frank, Torsten Balduf, Catrin Becker-Balfanz, Ina Hemme, Jurgen Rollmann, Rudiger Schutte, Werner Wildner
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Patent number: 5902682Abstract: Coated sodium percarbonate particles contain, in the coating, sodium carbonate and also one or more magnesium compounds, preferably magnesium sulfate, optionally in a partially hydrated form, in a single layer or in separate layers in the coating. Preferred coated sodium percarbonate particles contain two layers. Particles are prepared by spraying aqueous solutions containing the coating components onto sodium percarbonate in a fluidized bed with simultaneous evaporation of the water. The particles are suitable for use in detergents, bleaches and cleansing agents.Type: GrantFiled: January 16, 1996Date of Patent: May 11, 1999Assignee: Degussa AktiengesellschaftInventors: Birgit Bertsch-Frank, Martin Bewersdorf, Claas-Juergen Klasen, Thomas Lieser, Klaus Mueller, Juergen Rollmann
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Patent number: 5714201Abstract: A process for reducing dissolution time in the production of sodium percarbonate particles containing an alkali metal silicate as stabilizer by fluidized bed spray granulation and/or by coating sodium percarbonate particles with a coating containing an alkali metal silicate, wherein a solution containing alkali metal silicate is sprayed during production and/or coating which contains alkali metal silicate having a modulus in the range from less than 3 to greater than 1. Sodium percarbonate produced by fluidized bed spray granulation is distinguished by elevated Oa stability and short dissolution times and may thus readily be used in detergents and cleaning products containing silicate builders.Type: GrantFiled: September 13, 1996Date of Patent: February 3, 1998Assignee: Degussa AktiengesellschaftInventors: Martin Bewersdorf, Birgit Bertsch-Frank, Wolfgang Lortz
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Patent number: 5658873Abstract: Sodium percarbonate is often used in the form of coated particles to increase its storage stability in detergents.Sodium percarbonate particles coated in accordance with the invention have a coating containing reaction products from the reaction of a dialkali metal tetraborate or alkali metal pentaborate with aqueous hydrogen peroxide. Preferred coating components are: perborax with the formula Na.sub.2 B.sub.4 O.sub.7 .multidot.H.sub.2 O.sub.2, where n =2 or 4.The coated sodium percarbonate particles are produced by coating the percarbonate particles using a solution containing the reaction products mentioned above.Detergent, bleaching and cleaning compositions containing sodium percarbonate particles coated in accordance with the invention are distinguished by very high stability in storage.Type: GrantFiled: October 2, 1995Date of Patent: August 19, 1997Assignee: Degussa AktiengesellschaftInventors: Birgit Bertsch-Frank, Claas-Juergen Klasen, Thomas Lieser, Klaus Mueller, Martin Bewersdorf
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Patent number: 5632965Abstract: The invention relates to a method for increasing the storage stability of sodium percarbonate (2 Na.sub.2 CO.sub.3.3 H.sub.2 O.sub.2) by coating with a sodium perborate.According to the present invention wet sodium percarbonate salt, obtained by reacting sodium carbonate with hydrogen peroxide in aqueous phase and separating the salt from the aqueous phase, is treated with a solution or suspension containing sodium perborate in a solid-liquid separator by a kind of displacement wash. In contrast to previously known methods, according to the present invention a greater storage stability is attained with smaller quantities of perborate coating.Type: GrantFiled: September 28, 1995Date of Patent: May 27, 1997Assignee: Degussa AktiengesellschaftInventors: Claas-Juergen Klasen, Birgit Bertsch-Frank, Thomas Lieser, Peter Schubert, Klaus Mueller
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Patent number: 5560896Abstract: Sodium percarbonate is produced by means of fluidized bed granulation. The process includes spraying an aqueous sodium carbonate solution and a hydrogen peroxide solution onto nuclei in a fluidized bed and evaporating the water. In the process of the invention, it is not necessary to use a phosphorus-containing crystallization inhibitor in order to avoid cloggings and incrustations in and on the nozzle. This is accomplished by spraying the solutions through separate channels in a single ternary atomizer nozzle, to provide external mixing of the solutions with respect to the nozzle.Type: GrantFiled: June 1, 1995Date of Patent: October 1, 1996Assignee: Degussa AktiengesellschaftInventors: Martin Bewersdorf, Claas-Jurgen Klasen, Petra Look-Herber, Birgit Bertsch-Frank, Thomas Lieser, Klaus Muller
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Patent number: 5395602Abstract: The invention relates to sodium perborate hydrate granulates and a method for producing sodium perborate hydrate granulates with an available oxygen content of 14 to 18% by weight, especially 15 to 16% by weight; an abrasion index according to ISO test 5937 of not more than 10%; with a rate of dissolution of below 1.5 minutes, preferably below 1.0 minutes (for 1 gram of the granulate in 500 cm.sup.3 water, at 15.degree. C.); and with a bulk weight in the range of 0.6 to 1.2 kg/dm.sup.3. The sodium perborate hydrate granulate can be produced by compacting spray-dried, essentially amorphous sodium perborate hydrate starting material which exhibits a bulk weight below that of the granulate product, and a particle size of 90% less than 100 micrometers. The hydrate starting material is further characterized in that it loses 0.2 to 2.0% of its weight when stored at 60.degree. C. and 100 Pa for 30 minutes. The starting material is compacted between rollers at a contact pressure of 5.times.10 to 2.times.10.sup.Type: GrantFiled: December 18, 1990Date of Patent: March 7, 1995Assignee: Degussa AktiengesellschaftInventors: Joerg Herzig, Wolfgang Zikofsky, Birgit Bertsch-Frank, Thomas Lieser
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Patent number: 5250280Abstract: Previously known peroxymonosulfate solutions exhibit an unsatisfactory storage stability and/or can only be used with technical limitations. According to the invention, storage-stable, aqueous sodium peroxymonosulfate solutions can be prepared with a content of 5% to 50% by weight NaHSO.sub.5 in an economic manner by means of the partial neutralization of a solution containing sulfuric acid and Caro's acid if a such a solution containing H.sub.2 SO.sub.4 and H.sub.2 SO.sub.5 is added which contains less than 3 parts by weight hydrogen peroxide per 100 parts by weight Caro's acid and the partial neutralization is carried out up to an equivalent proportion of total SO.sub.3 to sodium ions in a range of 1 to 1 up to 1 to 1.3 and if the solution is diluted or concentrated as required.Type: GrantFiled: June 28, 1991Date of Patent: October 5, 1993Assignee: Degussa AktiengesellschaftInventors: Birgit Bertsch-Frank, Axel Duker, Friedrich Bittner, Gert Rossler
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Patent number: 5094827Abstract: The spray drying of a solution containing hydrogen peroxide and sodium metaborate to obtain primary particles which are immediately conveyed after leaving the drying zone to a granulating device and are then granulated in the presence of free and/or perborate water of crystallization. The granulated materials are dried, if necessary. The generally amorphous primary particles are converted into granulated materials with at least partially crystalline structure and significantly improved shelf life. The work is performed with advantage in a spray dryer with integrated fluid bed or in a compressing granulating device. The method is suitable for preparing perborate granulated materials with an active oxygen content of over 10% by weight, especially perborate monohydrate granular materials with 14 to 16% by weight active oxygen. A rapidly dissolving product is produced with an acceptable apparent weight for ease in packaging.Type: GrantFiled: August 20, 1990Date of Patent: March 10, 1992Assignee: Degussa AktiengesellschaftInventors: Birgit Bertsch-Frank, Klaus Mueller, Thomas Lieser
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Patent number: 4968500Abstract: The spray drying of a solution containing hydrogen peroxide and sodium metaborate to obtain primary particles which are immediately conveyed after leaving the drying zone to a granulating device and are then granulated in the presence of free and/or perborate water of crystallization. The granulated materials are dried, if necessary. The generally amorphous primary particles are converted into granulated materials with at least partially crystalline structure and significantly improved shelf life. The work is performed with advantage in a spray dryer with integrated fluid bed or in a compressing granulating device. The method is suitable for preparing perborate granulated materials with over 10% by wt., especially perborate monohydrate granular materials with 14-16% by wt. active oxygen.Type: GrantFiled: May 17, 1989Date of Patent: November 6, 1990Assignee: Degussa AktiengesellschaftInventors: Birgit Bertsch-Frank, Klaus Mueller, Thomas Lieser