Patents by Inventor Elke Schweers
Elke Schweers 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: 20150354132Abstract: Described herein are low-emission sheet materials, comprising at least one base layer and a (meth)acrylate-based coating arranged thereon, wherein the sheet material has a TVOC (total volatile organic compounds) value of ?50 ?g/m2.h, measured according to ISO 16000-10 by means of a field and laboratory emission cell (FLEC). Also described herein, are methods for making and using wear layers and sheet materials comprising same, obtained by irradiation at a wavelength from 10 nm to 200 nm or by irradiation wing a source of high-energy photons in combination with a UV radiator.Type: ApplicationFiled: January 17, 2014Publication date: December 10, 2015Inventors: ELKE SCHWEERS, JENS EHLERS, OLIVER REICHEL, REINER MEHNERT, JOSHUA J. LENSBOUER, DONG TIAN
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Patent number: 6653487Abstract: A process for preparing trioxane by converting methanol to formaldehyde by dehydrogenation at a temperature of 300 to 1000° C., in the presence of a catalyst, wherein the catalyst is generated physically separately from the reactor and at a temperature above the dehydrogenation temperature, and trimerizing the formaldehyde prepared in this way to give trioxane. Also described is a process for preparing polyoxymethylene and polyoxymethylene copolymers from the formaldehyde.Type: GrantFiled: June 21, 2002Date of Patent: November 25, 2003Assignee: Ticona GmbHInventors: Elke Schweers, Rolf Schulz, Thomas Kaiser, Uwe Dingerdissen
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Patent number: 6585176Abstract: The invention relates to a process for the comminution of bulk materials comprising synthetic polymers which do not have an elastomeric behavior by mechanical, thermal or electromagnetic loading of the bulk materials, which comprises treating the bulk materials, before and/or during the loading, with oxidants which have a redox potential of greater than 1.5 V or subjecting them to corona, UV or plasma treatment without complete oxidation of the synthetic polymer taking place.Type: GrantFiled: March 8, 2001Date of Patent: July 1, 2003Assignee: Siemens Axiva GmbH & Co. KGInventors: Olaf Mientkewitz, Elke Schweers, Ulrich Bauer, Helmut Gursky, Hubert Müller, Raimo Drögemeier
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Publication number: 20030065228Abstract: In a process for preparing formaldehyde from methanol by dehydrogenation in a reactor in the presence of a catalyst at a temperature in the range from 300 to 1000° C., the catalyst is generated spatially separately from the reactor and at a temperature above the dehydrogenation temperature.Type: ApplicationFiled: June 21, 2002Publication date: April 3, 2003Inventors: Elke Schweers, Rolf Schulz, Thomas Kaiser, Uwe Dingerdissen
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Publication number: 20020193639Abstract: A process and an apparatus for the post-purification in particular of pyrolysis gases for preparing pure formaldehyde, hemiformal being pyrolyzed in an evaporator, the resulting formaldehyde vapor being passed through a condensed liquid component collected in the bottom area of the evaporator, the condensed liquid component being passed out as a falling film situated on the inner wall through a cooled outlet tube disposed in the bottom area of the evaporator and the formaldehyde vapor being passed through the cooled outlet tube in cocurrent and the liquid component and the formaldehyde being taken off separately at the outlet tube end remote from the evaporator.Type: ApplicationFiled: April 30, 2002Publication date: December 19, 2002Applicant: Ticona GmbHInventors: Werner Sievers, Elke Schweers, Michael Rosenberg
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Patent number: 6472566Abstract: An apparatus for preparing formaldehyde from methanol by dehydrogenation in a reactor in the presence of a catalyst at a temperature in the range from 300 to 1000° C., a carrier gas stream which has a temperature above the dehydrogenation temperature is fed to the reactor.Type: GrantFiled: March 1, 2002Date of Patent: October 29, 2002Assignee: Ticona GmbHInventors: Elke Schweers, Thomas Kaiser, Michael Haubs, Michael Rosenberg
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Publication number: 20020133029Abstract: In a process for preparing formaldehyde from methanol by dehydrogenation in a reactor in the presence of a catalyst at a temperature in the range from 300 to 1000° C., a carrier gas stream which has a temperature above the dehydrogenation temperature is fed to the reactor.Type: ApplicationFiled: March 1, 2002Publication date: September 19, 2002Applicant: Ticona GmbH, a corporation of GermanyInventors: Elke Schweers, Thomas Kaiser, Michael Haubs, Michael Rosenberg
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Patent number: 6448448Abstract: The invention relates to a method for producing formaldehyde from methanol by non-oxidative dehydrogenation, in a reactor, in the presence of a catalyst at a temperature between 300 and 1000° C. Said method is characterized in that the generation of the catalyst takes place spatially separate from the reactor and at a temperature greater than the dehydrogenation.Type: GrantFiled: February 22, 2000Date of Patent: September 10, 2002Assignee: Ticona GmbHInventors: Elke Schweers, Rolf Schulz, Thomas Kaiser, Uwe Dingerdissen
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Patent number: 6433194Abstract: Process for the removal of trioxane from a liquid mixture comprising trioxane, formaldehyde, alcohol, hemiformals formed from the form-aldehyde and the alcohol, usual secondary components arising in the preparation of trioxane, and, in addition or as an alternative to the alcohol and the hemiformals, water, in which the trioxane is transferred into the gas phase by vaporization or evaporation and subsequently converted into a liquid state by condensation and obtained as condensate or converted into a solid state by desublimation and obtained as desublimate. Through the process, an increase in the concentration of the trioxane by 2.5 times or more is achieved.Type: GrantFiled: May 24, 2001Date of Patent: August 13, 2002Assignee: Ticona GmbHInventors: Elke Schweers, Albert Reichl, Stefan Heffels
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Patent number: 6414196Abstract: A process for the post-purification in particular of pyrolysis gases for preparing pure formaldehyde, hemiformal being pyrolyzed in an evaporator, the resulting formaldehyde vapor being passed through a condensed liquid component collected in the bottom area of the evaporator, the condensed liquid component being passed out as a falling film situated on the inner wall through a cooled outlet tube disposed in the bottom area of the evaporator and the formaldehyde vapor being passed through the cooled outlet tube in cocurrent and the liquid component and the formaldehyde being taken off separately at the outlet tube end remote from the evaporator.Type: GrantFiled: May 25, 2000Date of Patent: July 2, 2002Assignee: Ticona GmbHInventors: Werner Sievers, Elke Schweers, Michael Rosenberg
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Patent number: 6388102Abstract: Processes for making trioxane, polyoxymethylene and polyoxymethylene copolymers from formaldehyde, made by the dehydrogenation of methanol in the presence of a catalytic active species set free from a sodium compound, at a temperature in the range of 300° C. to 1000° C., wherein a carrier gas stream which has a temperature above the dehydrogenation temperature is fed to the reactor.Type: GrantFiled: July 9, 2001Date of Patent: May 14, 2002Assignee: Ticona GmbHInventors: Elke Schweers, Thomas Kaiser, Michael Haubs, Michael Rosenberg
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Patent number: 6362305Abstract: In a process for preparing formaldehyde from methanol by dehydrogenation in a reactor in the presence of a catalyst at a temperature in the range from 300 to 1000° C., a circulating gas stream comprising by-products of the dehydrogenation is passed through the reactor.Type: GrantFiled: February 28, 2000Date of Patent: March 26, 2002Assignee: Ticona GmbHInventors: Elke Schweers, Thomas Kaiser, Christine Meister, Michael Rosenberg, Rolf Schulz
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Patent number: 6339175Abstract: In a process for preparing formaldehyde from methanol by dehydrogenation in a reactor in the presence of a catalyst at a temperature in the range from 300 to 1000° C., a carrier gas stream which has a temperature above the dehydrogenation temperature is fed to the reactor.Type: GrantFiled: February 22, 2000Date of Patent: January 15, 2002Assignee: Ticona GmbHInventors: Elke Schweers, Thomas Kaiser, Michael Haubs, Michael Rosenberg
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Publication number: 20010053865Abstract: In a process for preparing formaldehyde from methanol by dehydrogenation in a reactor in the presence of a catalyst at a temperature in the range from 300 to 1000° C., a carrier gas stream which has a temperature above the dehydrogenation temperature is fed to the reactor.Type: ApplicationFiled: July 9, 2001Publication date: December 20, 2001Applicant: Ticona GmbH, corporation of GermanyInventors: Elke Schweers, Thomas Kaiser, Michael Haubs, Michael Rosenberg
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Patent number: 6313323Abstract: A process for the gas-phase trimerization of formaldehyde to give trioxane using solid phosphoric acid catalysts. Particularly suitable catalysts for this process are SPA catalysts (solid phosphorous acid), for example “silicon phosphates”. The main advantage of this catalyst system is its simple and inexpensive production and ready availability and also, in particular, its improved long-term stability compared to the few previously described catalysts which are mostly based on supported heteropolyacids.Type: GrantFiled: May 4, 2000Date of Patent: November 6, 2001Assignee: Ticona GmbHInventors: Harald Werner, Elke Schweers, Frank Olschewski, Gerhard Geiss, Elfriede Hufsky, Helmut Tränkler, Heinz Alexander
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Publication number: 20010022327Abstract: The invention relates to a process for the comminution of bulk materials comprising synthetic polymers which do not have an elastomeric behavior by mechanical, thermal or electromagnetic loading of the bulk materials, which comprises treating the bulk materials, before and/or during the loading, with oxidants which have a redox potential of greater than 1.5 V or subjecting them to corona, UV or plasma treatment without complete oxidation of the synthetic polymer taking place.Type: ApplicationFiled: March 8, 2001Publication date: September 20, 2001Inventors: Olaf Mientkewitz, Elke Schweers, Ulrich Bauer, Helmut Gursky, Hubert Muller, Raimo Drogemeier
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Patent number: 6232507Abstract: Process for the nonoxidative preparation of formaldehyde from methanol The invention relates to a process for preparing formaldehyde from methanol by dehydrogenation in a reactor at temperatures in the range from 300 to 1000° C. in the presence of a catalyst which is introduced into the reactor with the aid of a carrier gas to give a product gas mixture, wherein the formaldehyde is separated from the product gas mixture and at least part of the remaining product gas mixture is recirculated to the reactor in a circulating gas stream and the carrier gas used is a carbon-free gas or gas mixture.Type: GrantFiled: September 26, 2000Date of Patent: May 15, 2001Assignee: Ticona GmbHInventors: Thomas Kaiser, Elke Schweers, Christine Meister
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Patent number: 6229053Abstract: Abstract A process for purifying formaldehyde in which the formaldehyde is scrubbed with alcohol in an absorption unit and in the course of this reacted virtually completely to form the hemiformal and is simultaneously separated off from gaseous impurities in a first purification step. In a desorption unit, the residual impurities are then converted into a gaseous state and separated off from the liquid hemiformal, whereupon the purified hemiformal is thermally cleaved into alcohol and formaldehyde in a pyrolysis unit. The formaldehyde thus prepared is suitable, for example, for preparing oligomers, polymers, dyestuffs and fertilizers, as well as for the treatment of seeds.Type: GrantFiled: May 25, 2000Date of Patent: May 8, 2001Assignee: Ticona GmbHInventors: Werner Sievers, Elke Schweers, Christine Meister
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Patent number: 6121467Abstract: The invention relates to a method for separating a gaseous mixture comprising formaldehyde and trioxane, wherein at least some of the formaldehyde and the trioxane are dissolved from the mixture in a alcohol-containing liquid and the trioxane is crystallized from the solution thus obtained and is separated.Type: GrantFiled: July 23, 1999Date of Patent: September 19, 2000Assignee: Ticona GmbHInventors: Hagen Kniep, Christine Meister, Elke Schweers, Ioannis Nicolaou, Dirk Scheid