Patents by Inventor Herbert Riegel
Herbert Riegel 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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Publication number: 20120306163Abstract: The invention relates to a seal for the connecting region (2) between a housing connection piece (3) of a flowmeter (4) and a pipe end or pipe bushing (5), the seal (1) having a first sealing component (6) made from soft material, the seal (1) comprising additionally at least one second sealing component (7) made from a material which is harder than that of the first sealing component (6).Type: ApplicationFiled: May 23, 2012Publication date: December 6, 2012Applicant: HYDROMETER GMBHInventors: Christoph GRONAUER, Herbert RIEGEL
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Patent number: 5722629Abstract: A mounting for an external rear-view mirror of a commercial vehicle comprises a tubular arm, which is supported on a metal bracket to be joined to the commercial vehicle for pivoting about a pivot axis and for snap-in locking in various pivoting positions. The end, close to the vehicle, of the arm is inserted directly as a pivoting pin in a pivot bearing opening of the bracket, a bearing bush being placed in between for the formation of a plastics-metal bearing combination, and the bearing bush having an annular projection, which is provided with locking teeth meshing with mating teeth on the bearing bush.Type: GrantFiled: August 3, 1995Date of Patent: March 3, 1998Assignee: Mekra Rangau Plastics GmbH & Co. KGInventors: Heinrich Lang, Wolfgang Seiboth, Herbert Riegel
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Patent number: 4940687Abstract: Dienes and/or acetylene impurities in an olefin feed; in particular a propylene feed, may be selectively hydrogenated in a single stage by use of a catalyst of palladium supported on alumina which is substantially crystalline alpha alumina, wherein the average pore radius is 200-2000 .ANG., with at least 80% of the pores having a pore radius within the range of 100 to 3000 .ANG.. The surface acidity of the catalyst is generally from 0.002 to 0.05 millimole of pyridine absorbed per gram of catalyst. The active palladium surface area is from 20 to 200 m.sup.2 /g. The palladium is in the form of crystallines having an average size of at least 25 .ANG..Type: GrantFiled: August 5, 1988Date of Patent: July 10, 1990Assignees: Beijing Research Institute of Chemical Industry, Lummus Crest, Inc.Inventors: Xin X. Liu, Bing Y. Zhao, Herbert Riegel, Jo-Lung Chien
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Patent number: 4762956Abstract: Dienes and/or acetylene impurities in an olefin feed; in particular a propylene feed, may be selectively hydrogenated in a single stage by use of a catalyst of palladium supported on alumina which is substantially crystalline alpha alumina, wherein the average pore radius is 200-2000 .ANG., with a least 80% of the pores having a pore radius within the range of 100 to 3000 .ANG.. The surface acidity of the catalyst is generally from 0.002 to 0.05 millimole of pyridine absorbed per gram of catalyst. The active palladium surface area is from 20 to 200 m.sup.2 /g. The palladium is in the form of crystallines having an average size of at least 25 .ANG..Type: GrantFiled: April 30, 1986Date of Patent: August 9, 1988Assignee: Beijing Research Institute of Chemical Industry He Ping LiInventors: Xin X. Liu, Bing Y. Zhao, Herbert Riegel, Jo-Lung Chien
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Patent number: 4558167Abstract: Hydrogen chloride is recovered from a mixture with propylene by extractive distillation with an inert extraction solvent to minimize reaction between hydrogen chloride and propylene during such distillation. The temperature and pressure conditions are coordinated with the extraction solvent and amount thereof to prevent the presence of hydrogen chloride in a liquid state. The process is particularly suitable for recovering hydrogen chloride in the production of allyl chloride by thermal chlorination of propylene.Type: GrantFiled: August 1, 1983Date of Patent: December 10, 1985Assignee: The Lummus CompanyInventors: Herbert Riegel, Chiung-Yuan Huang, Vincent A. Strangio
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Patent number: 4351819Abstract: In an integrated process for oxychlorination and combustion of chlorinated hydrocarbons, chlorinated hydrocarbon is burned to recover chlorine values essentially as hydrogen chloride. Hydrogen chloride is recovered from the effluent from the combustion by absorption with aqueous hydrogen chloride. Hydrogen chloride recovered by the absorption is subsequently recovered and employed in an oxychlorination reaction. A gas containing hydrogen chloride, water vapor and some oxygen recovered from the oxychlorination is cooled to condense aqueous hydrogen chloride which is employed in the absorption for recovering hydrogen chloride. The remaining gas is employed in the combustion of chlorinated hydrocarbons.Type: GrantFiled: January 26, 1981Date of Patent: September 28, 1982Assignee: The Lummus CompanyInventors: Herbert Riegel, Chiung-Yuan Huang
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Patent number: 4346069Abstract: In an integrated process for oxychlorination and combustion of chlorinated hydrocarbons, chlorinated hydrocarbons is burned to recover chlorine values essentially as hydrogen chloride. Combustion effluent and off-gas from an oxychlorination reaction are simultaneously treated to recover anhydrous hydrogen chloride for use in the oxychlorination reaction. In accordance with one embodiment, off-gas from the oxychlorination is employed in the combustion, prior to hydrogen chloride recovery in order to utilize any oxygen values therein. The process has particular applicability to an oxychlorination reaction of the type wherein a molten salt containing the higher and lower valent chlorides of a multivalent metal is contacted with hydrogen chloride and oxygen to recover hydrogen chloride by enriching the higher valent metal chloride content of the molten salt.Type: GrantFiled: January 26, 1981Date of Patent: August 24, 1982Assignee: The Lummus CompanyInventors: Herbert Riegel, Chiung-Yuan Huang
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Patent number: 4346047Abstract: A molten salt containing the higher and lower valent chlorides, such as mixture of cuprous and cupric chloride, is contacted with oxygen and hydrogen chloride to enrich the salt in the higher valent metal chloride. The salt enriched in the higher valent metal chloride is contacted with carbon monoxide to both strip gaseous chlorine from the salt and produce phosgene by reaction with carbon monoxide and thereby recover essentially all chlorine values added to the salt. The reaction can be effected to provide stoichiometric quantities of carbon monoxide and chlorine in the effluent for producing additional phosgene.Type: GrantFiled: October 2, 1978Date of Patent: August 24, 1982Assignee: The Lummus CompanyInventor: Herbert Riegel
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Patent number: 4329525Abstract: A compound is chlorinated with chlorine to produce chlorinated product and hydrogen chloride byproduct. Recovered hydrogen chloride byproduct is contacted with oxygen and a molten salt mixture containing the higher and lower valent chlorides of a multivalent metal, such as cuprous and cupric chloride, to effect recovery of the hydrogen chloride by enriching the molten salt content of the higher valent chloride. The molten salt, enriched in higher valent chloride, is then dechlorinated by use of a stripping gas, preferably hydrogen chloride, to produce a gaseous effluent containing stripped chlorine and the stripping gas, which is then recycled to the chlorination step. The presence of stripping gas, as a diluent, improves the chlorination operation.Type: GrantFiled: February 21, 1978Date of Patent: May 11, 1982Assignee: The Lummus CompanyInventors: Herbert Riegel, Vincent Strangio, Morgan C. Sze
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Patent number: 4231969Abstract: Hexachlorocyclopentadiene is produced by the use of a molten salt mixture of cuprous and cupric chloride, with the reaction effluent including the product, chlorine, hydrogen chloride, unreacted feed and organic byproduct, as well as entrained molten salt. The effluent is cooled at a temperature and pressure to effect condensation of organics, with the salt being present in the condensate. The salt is then separated from the organics for re-use in the process. Hydrogen chloride and chlorine present in the effluent are also recovered for re-use in the process.Type: GrantFiled: February 21, 1978Date of Patent: November 4, 1980Assignee: The Lummus CompanyInventor: Herbert Riegel
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Patent number: 4207268Abstract: Methane is oxychlorinated to one or more chlorinated methanes, without net production of carbon tetrachloride, by contacting methane and chlorine and/or hydrogen chloride with a molten mixture of cuprous chloride, cupric chloride, and copper oxychloride, in the presence of an amount of carbon tetrachloride which inhibits net production thereof.Type: GrantFiled: March 30, 1978Date of Patent: June 10, 1980Assignee: The Lummus CompanyInventors: Morgan C. Sze, Herbert Riegel, Harvey D. Schindler
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Patent number: 4119705Abstract: Hydrogen chloride and oxygen are contacted with a molten mixture of cuprous and cupric chloride in a oxidation reaction zone to enrich the cupric chloride content of the melt, and the melt introduced into a dechlorination zone wherein gaseous chlorine is removed from the melt. The oxidation reactor is operated at a pressure higher than the dechlorination reactor, and molten salt circulation rates are controlled in a manner such that the cupric chloride content and temperature of the salt introduced into the dechlorination reaction zone are higher than the cupric chloride concentration and temperature of the melt introduced into the oxidation reactor.Type: GrantFiled: April 6, 1977Date of Patent: October 10, 1978Assignee: The Lummus CompanyInventors: Herbert Riegel, Vincent A. Strangio
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Patent number: 4107222Abstract: Methane is oxychlorinated to one or more chlorinated methanes, without net production of carbon tetrachloride, by contacting methane and chlorine and/or hydrogen chloride with a molten mixture of cuprous chloride, cupric chloride, and copper oxychloride, in the presence of an amount of carbon tetrachloride which inhibits net production thereof.Type: GrantFiled: November 11, 1975Date of Patent: August 15, 1978Assignee: The Lummus CompanyInventors: Morgan C. Sze, Herbert Riegel, Harvey D. Schindler
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Patent number: 4045504Abstract: Process for coupling an alkane to either an alkane, alkene, aliphatic carboxylic acid, or aromatic hydrocarbon by effecting contacting thereof and a melt containing a multivalent metal halide in both its higher and lower valance state. In accordance with a preferred embodiment, the contacting is effected in the presence of an oxygen containing gas or the melt is previously contacted with an oxygen containing gas to produce the corresponding oxyhalide of the metal, whereby the reaction may be effected on a continuous basis.Type: GrantFiled: March 29, 1976Date of Patent: August 30, 1977Assignee: The Lummus CompanyInventors: Maurice E. Brooks, Herbert Riegel, Harvey D. Schindler, Morgan C. Sze
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Patent number: 4036897Abstract: Hexachlorocyclopentadiene is produced by contacting pentane, pentene, cyclopentane or cyclopentene or chlorinated derivatives thereof with a molten salt mixture of cuprous and cupric chloride. Cyclopentadiene can also be employed as an initial feed, in which case the cyclopentadiene is initially chlorinated to effect saturation thereof, followed by contacting of the chloro substituted cyclopentane with a molten salt mixture of cuprous and cupric chloride to produce hexachlorocyclopentadiene.Type: GrantFiled: August 4, 1976Date of Patent: July 19, 1977Assignee: The Lummus CompanyInventors: Vincent A. Strangio, Herbert Riegel, Morgan C. Sze
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Patent number: 3980723Abstract: In the production of chlorinated hydrocarbons, a gas stream, containing hydrocarbon and carbon monoxide and/or nitrogen, as inerts, is separated from the effluent, and contacted with chlorinated hydrocarbon, as an absorption liquid, to absorb unreacted hydrocarbon. The absorbed hydrocarbon is stripped from the solution and recycled to the chlorinated hydrocarbon production. The process is particularly applicable to the production of chlorinated methanes and vinyl chloride.Type: GrantFiled: December 23, 1974Date of Patent: September 14, 1976Assignee: The Lummus CompanyInventor: Herbert Riegel
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Patent number: 3968050Abstract: In the oxidation of a molten salt, such as copper chlorides with the simultaneous recovery of chlorine values, as chlorine and/or hydrogen chloride, oxygen is introduced into a lower bed and chlorine values are introduced into an upper bed for contact with downwardly flowing melt. By reversing the point of introduction of chlorine values and oxygen, the overall bed contact area required is increased.Type: GrantFiled: March 12, 1974Date of Patent: July 6, 1976Assignee: The Lummus CompanyInventor: Herbert Riegel
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Patent number: 3965202Abstract: All or a portion of chlorinated hydrocarbons convertible to trichloroethylene and/or perchloroethylene by chlorination, dehydrochlorination or dehydrogenation and optionally also dechloroination are recovered from a C.sub.2 chlorinated hydrocarbon waste stream and contacted with a molten mixture of, for example, cuprous chloride, cupric chloride and copper oxychloride and hydrogen chloride and/or chlorine, to produce an effluent which contains as reaction product trichloroethylene and/or perchloroethylene. Chlorinated components in the waste stream not contacted with the molten mixture can be burned and the chlorine values used to enrich the chlorine content of the melt.Type: GrantFiled: June 20, 1973Date of Patent: June 22, 1976Assignee: The Lummus CompanyInventors: Herbert Riegel, Morgan C. Sze, Harvey D. Schindler
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Patent number: 3947489Abstract: Process for coupling an alkane to either an alkane, alkene, aliphatic carboxylic acid, or aromatic hydrocarbon by effecting contacting thereof and a melt containing a multivalent metal halide in both its higher and lower valence state. In accordance with a preferred embodiment, the contacting is effected in the presence of an oxygen containing gas or the melt is previously contacted with an oxygen containing gas to produce the corresponding oxyhalide of the metal, whereby the reaction may be effected on a continuous basis.Type: GrantFiled: October 23, 1968Date of Patent: March 30, 1976Assignee: The Lummus CompanyInventors: Maurice E. Brooks, Herbert Riegel, Harvey D. Schindler, Morgan C. Sze
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Patent number: 3937744Abstract: Process for producing vinyl chloride from ethane by contacting, in a first reactor, ethane and chlorine and/or hydrogen chloride, as fresh feed, and as recycle, hydrogen chloride, ethyl chloride, ethylene and unconverted ethane with a molten mixture, including cuprous chloride, cupric chloride and copper oxychloride, to produce a reaction effluent including vinyl chloride, dichloroethane, primarily 1,2-dichloroethane, and the aforementioned recycle components. The vinyl chloride is recovered as product, the recycle components are recovered and recycled to the first reactor, and the 1,2-dichloroethane is recovered and recycled to the first reactor or contacted in a second reactor with a molten mixture including cuprous and cupric chloride to dehydrochlorinate the 1,2-dichloroethane to vinyl chloride.Type: GrantFiled: June 15, 1971Date of Patent: February 10, 1976Assignee: The Lummus CompanyInventor: Herbert Riegel