Patents by Inventor Gerd Schreyer
Gerd Schreyer 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: 4434148Abstract: The residual gases obtained in the production of cyanuric chloride having a pressure of 1-5 bar (absolute) preferably 1-4 bar, are worked up by leading them into the lower portion of a column, reacted in the column with at least the equivalent amount of hydrogen cyanide to form cyanogen chloride and led in countercurrent flow to the water charged to the upper portion of the column whereupon the aqueous solution of cyanogen chloride formed is withdrawn from the lower portion of the column and preferably is returned into the production portion of the plant for recovery of the cyanogen chloride while the purified waste gas of the column leaves in the upper portion of the column.Type: GrantFiled: October 3, 1979Date of Patent: February 28, 1984Assignee: Degussa AktiengesellschaftInventors: Gerhard Bach, Friedhelm Geiger, Werner Heimberger, Gerd Schreyer, Horst Hillenbrand
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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: 4387081Abstract: In order to be independent of the situation in regard to methane and natural gas and at the same time to obtain a heating gas there is employed in the hydrocyanic acid-methane-ammonia process (the BMA process) in place of methane an alkanol or alkanediol having 2-4 carbon atoms, preferably ethyl alcohol, and this is reacted with ammonia in a C:N ratio of 0.8:1 to 2:1. Optionally additional hydrogen can be present.Type: GrantFiled: September 21, 1981Date of Patent: June 7, 1983Assignee: Degussa AGInventors: Carl Voigt, Peter Kleinschmit, Gerd Schreyer, Gerhard Sperka
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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: 4341709Abstract: A process for the preparation of .epsilon.-caprolactone comprising:(a) reacting cyclohexanone with a solution of perpropionic acid in an organic solvent at a molar ratio of cyclohexanone;perpropionic acid of about 1.1-5:1 at a temperature of about 10.degree. to 80.degree. C. to form a reaction mixture consisting essentially of .epsilon.-caprolactone, propionic acid and organic solvent,(b) distilling the reaction mixture from (a) in a first distillation unit to obtain a distillate comprising the organic solvent and a distillation residue,(c) introducing the distillation residue from (b) at a point into a second distillation unit to obtain a distillate comprising propionic acid and unreacted cyclohexanone, removing from the second distillation unit, separately from one another and at a point below the point of introduction into the second distillation unit, .epsilon.Type: GrantFiled: May 15, 1980Date of Patent: July 27, 1982Assignee: Bayer AktiengesellschaftInventors: Willi Hofen, Herbert Klenk, Gerd Schreyer, Otto Weiberg, Helmut Waldmann, Hermann Seifert, Karl-Hermann Reissinger, Wolfgang Swodenk
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Patent number: 4314064Abstract: Nicotinamide is prepared from nicotinonitrile by hydrolysis at 120.degree. to 200.degree. C. employing alkali hydroxide.Type: GrantFiled: September 29, 1980Date of Patent: February 2, 1982Assignee: Detusche Gold- und Silber-Scheindeanstalt vormals RoesslerInventors: Helmut Beschke, Heinz Friedrich, Klaus-Peter Muller, Gerd Schreyer
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Patent number: 4303621Abstract: Methionine and potassium are recovered from the recycling solution of the potassium carbonate-methionine process by concentrating the mother liquor after the methionine precipitation and with cooling carbonating the mother liquor.Type: GrantFiled: August 1, 1978Date of Patent: December 1, 1981Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals RoesslerInventors: Theodor Lussling, Klaus-Peter Muller, Gerd Schreyer, Ferdinand Theissen
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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: 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
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Patent number: 4239696Abstract: Alkylsulfonic acids are prepared by oxidation of an alkyl mercaptan or dialkyl disulfide with hydrogen peroxide in an alkylsulfonic acid in the absence of percarboxylic acids and preferably employing 1 to 35 mole % of alkylsulfonic acid based on the alkyl mercaptan or dialkyl disulfide employed.Type: GrantFiled: February 4, 1976Date of Patent: December 16, 1980Inventors: Gerd Schreyer, Friedhelm Geiger, Jorg Hensel
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Patent number: 4237299Abstract: Pyridine and 3-methylpyridine prepared by the catalytic reaction of acrolein or a mixture of acetaldehyde and acrolein with ammonia is recovered from the gas mixture formed by cooling the gas mixture and working up the condensate separated in the cooling. The gaseous mixture is first cooled to a temperature between 40.degree. and about 80.degree. C. and then cooled to a temperature between about 10.degree. and below 40.degree. C.Type: GrantFiled: December 6, 1976Date of Patent: December 2, 1980Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals RoesslerInventors: Helmut Beschke, Franz-Ludwig Dahm, Heinz Friedrich, Gerd Schreyer
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Patent number: 4228084Abstract: Glycidyl methacrylate is produced by transesterifying methyl methacrylate with glycidol in the presence of a polymerization inhibitor and a transesterification catalyst in which the catalyst is a salt of formula MeX where Me is an alkali metal ion and X is a cyanide, cyanate or thiocyanate ion.Type: GrantFiled: June 3, 1976Date of Patent: October 14, 1980Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals RoesslerInventors: Rolf Ackermann, Heinz Kolb, Gerhard Morlock, Gerd Schreyer
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Patent number: 4197161Abstract: Catalysts used in the epoxidation or hydroxylation of water soluble olefinic compound with hydrogenperoxide are recovered by separating the catalyst as a distillation residue, the distillation residue is introduced into an inert material which is in whirling movement, e.g., as a fluidized bed, the organic compounds contained in the distillation residue are burned with oxygen or oxygen containing gases whereupon the catalyst compound separated on the inert whirling material together with the portion of the catalyst compound which accumulates in the solids separator connected at the outlet of the reactor is dissolved in water and the solution obtained again used for epoxidation or hydroxylation.Type: GrantFiled: September 30, 1975Date of Patent: April 8, 1980Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals RoesslerInventors: Heinz Friedrich, Wolfgang Heim, Axel Kleemann, Heinz Kolb, Gerd Schreyer
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Patent number: 4171445Abstract: Pyridine and 3-methyl pyridine are prepared by reacting acrolein with ammonia in the gas phase on a catalyst in a fluidized bed. The acrolein and ammonia are introduced separately in gaseous form into the reactor.Type: GrantFiled: October 15, 1975Date of Patent: October 16, 1979Assignee: Deutsche Gold- und Siber-Scheideanstalt vormals RoesslerInventors: Helmut Beschke, Heinz Friedrich, Gerd Schreyer
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Patent number: 4159925Abstract: Process for isolating propylene glycol diacarboxylates in the preparation of propylene oxide by reaction of propylene with a solution of percarboxylic acid in an organic solvent, the boiling point of which is lower than that of the carboxylic acid which corresponds to the percarboxylic acid used as the epoxidizing agent, and higher than that of propylene oxide, separation, by distillation, of the reaction mixture which essentially contains propylene oxide, the carboxylic acid corresponding to the percarboxylic acid used as the epoxidizing agent and one or more of the by-products propyleneglycol, propylene glycol monocarboxylate and propylene glycol dicarboxylate as well as propylene and the organic solvent, into a fraction containing propylene oxide and propylene and a fraction containing the carboxylic acid, the by-products mentioned and the organic solvent and further separation of the fractions into the individual components by distillation.Type: GrantFiled: December 9, 1977Date of Patent: July 3, 1979Assignees: Bayer Aktiengesellschaft, Deutsche Gold- und Silber-Scheideanstalt vormals RoesslerInventors: Gerd Schreyer, Rolf Wirthwein, Karl-Hermann Reissinger, Jorg Krekel
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Patent number: 4150241Abstract: Pure racemic acid (dl-tartaric acid) and meso tartaric acid are produced by reaction of an alkali maleate with aqueous hydrogen peroxide in the presence of an alkali tungstate in a process wherein the molar ratio of hydrogen peroxide to maleic acid is greater than 1:1 and the alkali salt of cis-epoxysuccinic acid formed together with the alkali tungstate, in a given case after destroying the excess hydrogen peroxide, are converted to free cis-epoxysuccinic acid and free tungstic acid by leading them over a strongly acidic cation exchanger, whereupon the hydrolysis of the free cis-epoxysuccinic acid to racemic acid and meso-tartaric acid can take place either in the presence of or the absence of the free tungstic acid, whereby the tungstic acid in the case of catalyst free hydrolysis before, and in the case of catalyst containing hydrolysis after this hydrolysis is removed with an anion exchanger and the racemic acid is then in known manner crystallized out of the tungstic acid free hydrolysis mixture by lowerType: GrantFiled: February 9, 1976Date of Patent: April 17, 1979Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals RoesslerInventors: Gunter Prescher, Gerd Schreyer
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Patent number: 4139536Abstract: Nicotinamide is recovered from the reaction mixture resulting from the hydrolysis of nicotinonitrile at elevated temperature by converting the nicotinamide into a melt while removing the solvent.Type: GrantFiled: April 12, 1976Date of Patent: February 13, 1979Assignee: Deutsche Gold- Und Silber-Scheideanstalt vormals RoesslerInventors: Helmut Beschke, Heinz Friedrich, Klaus-Peter Muller, Gerd Schreyer
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Patent number: 4137242Abstract: Process for continuous production of propylene oxide (FIG. 1) from propylene and aqueous hydrogen peroxide. The aqueous hydrogen peroxide is first reacted with propionic acid in the presence of acid catalyst to form perpropionic acid (1). The perpropionic acid is taken up by extraction in benzene (5, 18) and following drying of the benzene solution (21), the perpropionic acid in the solution is reacted with propylene (24) for oxidation of the propylene to propylene oxide and conversion of the perpropionic acid back to propionic acid. The reaction mixture is worked up to separate propylene oxide, propionic acid and benzene (30, 32, 37, 39), and the latter two are recycled. In the benzene extraction (5, 18), an aqueous raffinate (7) is formed containing hydrogen peroxide and acid catalyst.Type: GrantFiled: April 28, 1976Date of Patent: January 30, 1979Assignees: Bayer Aktiengesellschaft, Deutsche Gold- und Silber-Scheideanstalt Vormals RoesslerInventors: Gunter Prescher, Gerd Schreyer, Otto Weiberg, Rolf Wirthwein, Helmut Waldmann, Hermann Seifert, Wulf Schwerdtel, Wolfgang Swodenk
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Patent number: RE30945Abstract: Process for continuous production of propylene oxide (FIG. 1) from propylene and aqueous hydrogen peroxide. The aqueous hydrogen peroxide is first reacted with propionic acid in the presence of acid catalyst to form perpropionic acid (1). The perpropionic acid is taken up by extraction in benzene (5, 12), and following drying of the benzene solution (16), the perpropionic acid in the solution is reacted with propylene (18) for oxidation of the propylene to propylene oxide and conversion of the perpropionic acid back to propionic acid. The reaction mixture is worked up to separate propylene oxide, propionic acid and benzene (25, 27, 31, 33), and the latter two are recycled. In the benzene extraction (5, 12), an aqueous raffinate (7) is formed containing hydrogen peroxide and acid catalyst. Water is removed from the aqueous raffinate (8) and the concentrate is recycled to the propionic acid reactor. Make-up hydrogen peroxide can be added to the aqueous raffinate before the removal of water.Type: GrantFiled: February 14, 1980Date of Patent: May 25, 1982Assignees: Bayer AG, Deutsche Gold-und Silver Scheideanstalt Vormals RoesslerInventors: Guter Prescher, Gerd Schreyer, Otto Weiberg, Rolf Wirthwein, Helmut Waldmann, Hermann Seifert, Wulf Schwerdtel, Wolf Swodenk
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Patent number: RE31381Abstract: Process for continuous production of propylene oxide (FIG. 1) from propylene and aqueous hydrogen peroxide. The aqueous hydrogen peroxide is first reacted with propionic acid in the presence of acid catalyst to form perpropionic acid (1). The perpropionic acid is taken up by extraction in benzene (5, 18) and following drying of the benzene solution (21), the perpropionic acid in the solution is reacted with propylene (24) for oxidation of the propylene to propylene oxide and conversion of the perpropionic acid back to propionic acid. The reaction mixture is worked up to separate propylene oxide, propionic acid and benzene (30, 32, 37, 39), and the latter two are recycled. In the benzene extraction (5, 18), an aqueous raffinate (7) is formed containing hydrogen peroxide and acid catalyst.Type: GrantFiled: February 14, 1980Date of Patent: September 13, 1983Assignees: Bayer Aktiengesellschaft, Deutsche Gold-und Silber-ScheideanstaltInventors: Gunter Prescher, Gerd Schreyer, Otto Weiberg, Rolf Wirthwein, Helmut Waldmann, Hermann Seifert, Wulf Schwerdtel, Wolf Swodenk