Patents by Inventor Friedrich Bittner
Friedrich Bittner 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: 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: 5080881Abstract: Methods for the preparation of lower sodium polysulfides such as sodium disulfide from higher sodium polysulfides and sodium. To this end, either molten sodium polysulfide placed in a receiver is reacted with sodium in a stoichiometric ratio corresponding to the desired product under vigorous agitation and under protective gas or the higher polysulfide and the sodium are dosed into a polysulfide melt in a receiver under the same conditions either alternatively or simultaneously. In all instances, the dosing of the sodium is set so that the reaction mixture remains capable of being agitated and the agitation is continued until the desired product composition has been achieved.Type: GrantFiled: September 11, 1989Date of Patent: January 14, 1992Assignee: Degussa AktiengesellschaftInventors: Friedrich Bittner, Walter Hinrichs, Herbert Hovestadt, deceased, Ludwig Lange, Erich Splett
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Patent number: 5075098Abstract: A method of preparing sodium monosulfide by means of reacting a sodium polysulfide with sodium under protective gas, the sodium polysulfide is placed in a first stage in a finely distributed, solid state in a receiver, preheated to temperatures of 100.degree.-150.degree. C., liquid sodium is gradually added in the required amount to the material in the receiver under intensive mixing, whereby the temperature of the reaction mixture is maintained at 120.degree.-250.degree. C. and in a second stage the formed initial product is allowed to continue to react, or postreact under continuation of the mixing at 250.degree.-480.degree. C., until a Na.sub.2 S content of at least 95% by weight has been attained.Type: GrantFiled: April 19, 1990Date of Patent: December 24, 1991Assignee: Degussa AktiengesellschaftInventors: Friedrich Bittner, Walter Hinrichs, Lutz Hippe, Ludwig Lange, Erich Splett
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Patent number: 5039505Abstract: A method of preparing sodium monosulfide by means of reacting sodium and sulfur under protective gas, wherein sodium monosulfide is placed in a first stage in a receiver in a finely distributed, solid state, the initial material is preheated to 120.degree.-150.degree. C. and sulfur and sodium are alternately added in the required amount ratio under intensive mixing, whereby the temperature of the reation mixture is maintained at 120.degree.-250.degree. C., and in a second stage the formed initial product is allowed to continue to react or postreact under continuation of the mixing at 250.degree.-480.degree. C., until a Na.sub.2 S content of at least 95% by weight has been attained.Type: GrantFiled: April 19, 1990Date of Patent: August 13, 1991Assignee: Degussa AktiengesellschaftInventors: Friedrich Bittner, Walter Hinrichs, Lutz Hippe, Ludwig Lange, Erich Splett
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Patent number: 5039506Abstract: In a method of preparing sodium monosulfide by means of reacting sodium and sulfur under protective gas, the entire sodium determined for reaction is placed in a receiver in a first stage, preheated to temperatures of 100.degree.-150.degree. C., sulfur is gradually added in the required amount of the material in the receiver under intensive mixing, whereby the temperature of the reaction mixture is maintained at 120.degree.-250.degree. C., and in a second stage the formed initial product is allowed to react under continuation of the mixing at 250.degree.-480.degree. C., until a Na.sub.2 S content of at least 95% by weight has been attained.Type: GrantFiled: April 19, 1990Date of Patent: August 13, 1991Assignee: Degussa AktiengesellschaftInventors: Friedrich Bittner, Walter Hinrichs, Lutz Hippe, Ludwig Lange, Erich Splett
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Patent number: 5039643Abstract: A method for the production of catalytically active coatings on shaped articles of aluminum oxide for the production of hydrogen cyanide according to the BMA method. A suspension is used for the coating which suspension contains at least one platinum metal and aluminum in finely divided elementary form in a carrier liquid. According to especially preferred embodiments, the suspension additionally contains glass frits or organic silicon compounds. After the moistening of the shaped article and evaporation of the carrier liquid, the catalyst is formed during heating to 1000.degree. to 1350.degree. C. in the presence of nitrogen and/or ammonia.Essential advantages of the method over the previously known method of coating with solutions of Pt and Al compounds are: the application of different coating thicknesses are possible in a single coating stage, the previously-necessary hydrogenation stage after each impregnation is eliminated and the health risk is reduced.Type: GrantFiled: July 10, 1990Date of Patent: August 13, 1991Assignee: Degussa AktiengesellschaftInventors: Christian Hecht, Peter Panster, Friedrich Bittner, Petra Look-Herber
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Patent number: 4640832Abstract: There is described a process for the production of pure sodium polysulfides directly from the elements sodium and sulfur. For this purpose, the sodium and the sulfur under a protective gas and in a stoichiometrical ratio corresponding to the desired polysulfide are alternatingly dosed into a previously present melt of a polysulfide with vigorous stirring, the dosing being in portions such that upon introduction of the sodium the reaction mixture remains in the condition of a stirrable suspension and upon introduction of the sulfur this is completely reacted to a polysulfide of the desired or higher sulfur content.Type: GrantFiled: September 4, 1985Date of Patent: February 3, 1987Assignee: Degussa AktiengesellschaftInventors: Friedrich Bittner, Walter Hinrichs, Herbert Hovestadt, Ludwig Lange, Erich Splett
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Patent number: 4629617Abstract: The method for the preparation of hydrogen sulfide from its respective elements wherein sulfur and hydrogen are reacted in a diffusion flame in a temperature range of 650.degree. to 1300.degree. C.Type: GrantFiled: August 13, 1985Date of Patent: December 16, 1986Assignee: Degussa AGInventors: Karl Voigt, Reinhold Reck, Friedrich Bittner, Peter Kleinschmit
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Patent number: 4413021Abstract: There is provided an apparatus for bringing into contact liquids at least one of which is viscous, the apparatus consisting essentially of a tubular container, a first nozzle from introducing a liquid in the upper portion of the container, at least one other nozzle lower than the first nozzle for introducing a different liquid, the tubular container being closeable at the tap thereof and downward from said other nozzle being constricted breast shaped to form a discharge opening, said other nozzles are preferably of polished steel, said other nozzles consist essentially of at least one tangential spray means arranged in at least one row, said other nozzles being slightly above said constriction and being directed in the direction of the upper closeable device or said first nozzle and wherein the discharge opening can discharge into another container which is permanently or detachably connected to the tubular container, said further container can be provided with means for establishing reduced pressure or superType: GrantFiled: August 17, 1982Date of Patent: November 1, 1983Inventors: Klaus Hentschel, Friedrich Bittner, Gerd Schreyer, Georg Franz
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Patent number: 4391987Abstract: Aqueous sodium methioninate solutions having a low content of sodium carbonate can be recovered from the crude hydrolysis mixture resulting from the saponification of 5-(.beta.-methylmercaptoethyl)hydantoin with 1.1 to 6 equivalents of sodium hydroxide and/or sodium carbonate by cooling the crude hydrolysis mixture to a temperature below 10.degree. C., separating off the precipitated sodium carbonate and concentrating the sodium methioninate solution remaining to 40 to 65 weight percent.Type: GrantFiled: February 10, 1982Date of Patent: July 5, 1983Assignee: Degussa AktiengesellschaftInventors: Manfred Spindler, Herbert Tanner, Friedhelm Geiger, Friedrich Bittner, Jurgen Martens
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Patent number: 4391988Abstract: Aqueous sodium methioninate solutions having a low content of sodium carbonate can be recovered from the crude hydrolysis mixture resulting from the saponification of 5-(.beta.-methylmercaptoethyl)-hydantoin with 1.1 to 6 equivalents of sodium hydroxide and/or sodium carbonate by distilling off the water from the crude hydrolysis mixture until the sodium methioninate content is 40 to 65 weight percent, and after cooling to at most room temperature separating off the precipitated sodium carbonate.Type: GrantFiled: February 10, 1982Date of Patent: July 5, 1983Assignee: Degussa AktiengesellschaftInventors: Manfred Spindler, Herbert Tanner, Friedhelm Geiger, Friedrich Bittner, Jurgen Martens
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Patent number: 4377344Abstract: There is provided an apparatus for bringing into contact liquids at least one of which is viscous, the apparatus consisting essentially of a tubular container, a first nozzle from introducing a liquid in the upper portion of the container, at least one other nozzle lower than the first nozzle for introducing a different liquid, the tubular container being closeable at the tap thereof and downward from said other nozzle being constricted breast shaped to form a discharge opening, said other nozzles are preferably of polished steel, said other nozzles consist essentially of at least one tangential spray means arranged in at least one row, said other nozzles being slightly above said constriction and being directed in the direction of the upper closeable device or said first nozzle and wherein the discharge opening can discharge into another container which is permanently or detachably connected to the tubular container, said further container can be provided with means for establishing reduced pressure or superType: GrantFiled: November 15, 1979Date of Patent: March 22, 1983Assignee: Degussa AGInventors: Klaus Hentschel, Friedrich Bittner, Gerd Schreyer, Georg Franz
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Patent number: 4328010Abstract: To obtain a cyanogen chloride which is practically free from water and preferably also free from hydrogen cyanide, hydrogen chloride and organic compounds, the crude cyanogen chloride is fractionally distilled. The return is led in countercurrent flow to the crude gas, thereby takes up the impurities and is further evaporated in the lower portion of the column, respectively in a special apparatus, by a liquid whose temperature is higher than the boiling temperature of cyanogen chloride. Thereby this liquid also takes up the impurities. The purification action is aided by a wash for the crude cyanogen chloride connected in series before it enters the fractionating column. It is very advantageous to combine the process with a plant for the production of cyanogen chloride.Type: GrantFiled: July 31, 1980Date of Patent: May 4, 1982Assignee: Degussa AktiengesellschaftInventors: Friedrich Bittner, Werner Heimberger, Kurt Henkel, Norbert Kriebitzsch, Martin Petzold, Kurt Puschner
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Patent number: 4320104Abstract: By introducing the reaction gas mixture of hydrocarbons and ammonia at increased velocity through an inlet tube with one or more openings in a customary reaction tube in the hydrocyanic acid-methane-ammonia (BMA) process the yield of HCN is increased considerably.Type: GrantFiled: September 3, 1980Date of Patent: March 16, 1982Assignee: Degussa AktiengesellschaftInventors: Friedrich Bittner, Carl Voigt, Peter Kleinschmit
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Patent number: 4281123Abstract: Three substituents are introduced into cyanuric acid in the presence of an acid binding agent by working in a manner permitting high mixing and therefore high reaction velocities and permitting high throughputs in small tubular containers by introducing liquid cyanuric chloride through a nozzle in the upper portion of the mixing apparatus in countercurrent flow to upwardly flowing reactants (and acid binding agent) introduced from at least one lower nozzle above a breast shaped constriction in the lower, open portion of the apparatus. The process can be carried out at normal, reduced or elevated pressure.Type: GrantFiled: November 16, 1979Date of Patent: July 28, 1981Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals RoesslerInventors: Klaus Hentschel, Friedrich Bittner
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Patent number: 4275203Abstract: Chloro-amino-s-triazines are produced by the known reaction of cyanuric chloride with an amine or .alpha.-aminonitrile in the presence of an acid binding agent in an improved manner by working at high mixing velocities and thus at high reaction speed and thereby obtaining high throughputs in small tubular containers by introducing liquid cyanuric chloride through a nozzle in the upper portion of the mixing apparatus in countercurrent flow to upwardly flowing reactants (plus acid binding agent) introduced from at least one lower nozzle about a breast shaped constriction in the lower, open portion of the apparatus. The process can be carried out at normal, reduced or elevated pressure.Type: GrantFiled: November 16, 1979Date of Patent: June 23, 1981Assignee: Deutsche Gold und Silber Scheideanstalt vormals RoesslerInventors: Klaus Hentschel, Friedrich Bittner
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Patent number: 4271297Abstract: Suspension or solutions of cyanuric chloride in water containing organic solvents are prepared at high mixing velocities and low temperatures with resulting low degree of hydrolysis by introducing liquid cyanuric chloride through a nozzle in the upper portion of the mixing apparatus in countercurrent flow to upwardly flowing solvent introduced from at least one lower nozzle above a breast shaped constriction in the lower, open portion of the apparatus. In this way the chamber walls are always covered with an unbroken layer of liquid. The process can be carried out at normal, reduced or elevated pressure. At reduced pressure by evaporation of the solvent there is simultaneously a cooling of the system.Type: GrantFiled: November 16, 1979Date of Patent: June 2, 1981Assignee: Deutsche Gold-und Silber-Scheideanstalt vormals RoesslerInventors: Klaus Hentschel, Friedrich Bittner, Gerd Schreyer
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Patent number: 4271298Abstract: Suspension or solutions of cyanuric chloride in water are prepared at high mixing velocities and low temperatures with resulting low degree of hydrolysis by introducing liquid cyanuric chloride through a nozzle in the upper portion of the mixing apparatus in countercurrent flow to upwardly flowing water introduced from at least one lower nozzle above a breast shaped constriction in the lower, open portion of the apparatus. In this way the chamber walls are always covered with an unbroken layer of liquid. The process can be carried out at normal, reduced or elevated pressure. At reduced pressure by evaporation of the water there is simultaneously a cooling of the system.Type: GrantFiled: November 16, 1979Date of Patent: June 2, 1981Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals RoesslerInventors: Klaus Hentschel, Friedrich Bittner, Gerd Sohreyer
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Patent number: 4271299Abstract: 2-Alkoxy-4,6-dichloro-s-triazines are produced by the known reaction of cyanuric chloride with an alcohol in the presence of an acid binding agent in an improved manner by working at high mixing velocities and thus at high reaction speed and thereby obtaining high throughputs in small tubular containers by introducing liquid cyanuric chloride through a nozzle in the upper portion of the mixing apparatus in countercurrent flow to upwardly flowing reactants (plus acid binding agent) introduced from at least one lower nozzle above a breast shaped constriction in the lower, open portion of the apparatus. The process can be carried out at normal, reduced or elevated pressure.Type: GrantFiled: November 15, 1979Date of Patent: June 2, 1981Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals RoesslerInventors: Klaus Hentschel, Friedrich Bittner
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Patent number: 4269979Abstract: Finely divided suspensions of cyanuric chloride in organic solvents which are practically water free are prepared at high mixing velocities and low temperatures by introducing liquid cyanuric chloride through a nozzle in the upper portion of the mixing apparatus in countercurrent flow to upwardly flowing solvent introduced from at least one lower nozzle above a breast shaped constriction in the lower open portion of the apparatus. In this way the chamber walls are always covered with an unbroken layer of liquid. The process can be carried out at normal, reduced or elevated pressure. At reduced pressure by evaporation of the solvent there is simultaneously a cooling of the system.Type: GrantFiled: November 16, 1979Date of Patent: May 26, 1981Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals RoesslerInventors: Klaus Hentschel, Friedrich Bittner, Gerd Schreyer