Patents by Inventor Edwin Ritzer
Edwin Ritzer 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).
-
Patent number: 9102613Abstract: A method is described for the production of sorbic anhydride, in which alkali metal or alkaline earth metal salts of sorbic acid are reacted with phosgene in an inert organic solvent. In addition, use thereof as a preservative in foods, in particular drinks, is described.Type: GrantFiled: October 27, 2011Date of Patent: August 11, 2015Assignee: LANXESS DEUTSCHLAND GMBHInventors: Ralf Krahwinkel, Robert Markert, Edwin Ritzer, Erasmus Vogl
-
Publication number: 20140087039Abstract: A method is described for the production of sorbic anhydride, in which alkali metal or alkaline earth metal salts of sorbic acid are reacted with phosgene in an inert organic solvent. In addition, use thereof as a preservative in foods, in particular drinks, is described.Type: ApplicationFiled: October 27, 2011Publication date: March 27, 2014Applicant: LANXESS Deutschland GmbHInventors: Ralf Krahwinkel, Robert Markert, Edwin Ritzer, Erasmus Vogl
-
Publication number: 20130129732Abstract: Method for producing microbially stabilized foods characterized in that a food containing a dialkyl dicarbonate is treated by means of electroporation.Type: ApplicationFiled: August 26, 2010Publication date: May 23, 2013Applicant: LANXESS Deutschland GmbHInventors: Rebecca Lässker, Edwin Ritzer
-
Patent number: 8440719Abstract: Carboxylic anhydrides are highly suitable as additive for industrial materials, cosmetics, pharmaceutics and foodstuffs, in particular beverages, for protecting them against attack and/or destruction by microorganisms.Type: GrantFiled: May 25, 2012Date of Patent: May 14, 2013Assignee: LANXESS Deutschland GmbHInventors: Johannes Kaulen, Erasmus Vogl, Edwin Ritzer, Manfred Hoffmann
-
Publication number: 20120232154Abstract: Carboxylic anhydrides are highly suitable as additive for industrial materials, cosmetics, pharmaceutics and foodstuffs, in particular beverages, for protecting them against attack and/or destruction by microorganisms.Type: ApplicationFiled: May 25, 2012Publication date: September 13, 2012Applicant: LANXESS DEUTSCHLAND GMBHInventors: Johannes KAULEN, Erasmus VOGL, Edwin RITZER, Manfred HOFFMANN
-
Patent number: 8207224Abstract: Carboxylic anhydrides are highly suitable as additive for industrial materials, cosmetics, pharmaceutics and foodstuffs, in particular beverages, for protecting them against attack and/or destruction by microorganisms.Type: GrantFiled: July 18, 2007Date of Patent: June 26, 2012Assignee: LANXESS Deutchland GmbHInventors: Johannes Kaulen, Erasmus Vogl, Edwin Ritzer, Manfred Hoffmann
-
Publication number: 20100021599Abstract: A mixture of dimethyl dicarbonate and at least one organic acid of the series of dicarboxylic and tricarboxylic acids and salts thereof is advantageously suitable for sterilization and preservation of drinks.Type: ApplicationFiled: April 11, 2007Publication date: January 28, 2010Applicant: LANXESS DEUTSCHLAND GMBHInventors: Martin Kugler, Edwin Ritzer, Manfred Hoffmann
-
Publication number: 20090264532Abstract: Carboxylic anhydrides are highly suitable as additive for industrial materials, cosmetics, pharmaceutics and foodstuffs, in particular beverages, for protecting them against attack and/or destruction by microorganisms.Type: ApplicationFiled: July 18, 2007Publication date: October 22, 2009Applicant: LANXESS DEUTSCHLAND GMBHInventors: Johannes Kaulen, Erasmus Vogl, Edwin Ritzer, Manfred Hoffmann
-
Patent number: 6350893Abstract: Dibenzyl carbonates are prepared by reacting a dialkyl carbonate with a benzyl alcohol in the presence of a basic catalyst and removing the highly volatile components and the catalyst from the reaction mixture. This process permits the preparation of benzyl carbonates in a simple manner, in good yields and without any particular technical safety arrangements.Type: GrantFiled: October 10, 2000Date of Patent: February 26, 2002Assignee: Bayer AktiengesellschaftInventors: Edwin Ritzer, Claus Dreisbach
-
Patent number: 6160160Abstract: The present invention relates to a process for preparing optionally substituted benzyl carbazates of formula (I) ##STR1## wherein each R.sup.1 independently represents C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, di(C.sub.1 -C.sub.4 -alkyl)amino, nitro, halogen, hydroxyl, the group X-R.sup.3, wherein X represents O or S and R.sup.3 represents straight-chain or branched C.sub.1 -C.sub.4 -alkyl, the group COOR.sup.4, wherein R.sup.4 represents C.sub.1 -C.sub.4 -alkyl, the group NR.sup.5 R.sup.6, wherein R.sup.5 and R.sup.6 independently represent C.sub.1 -C.sub.4 -alkyl, or a C.sub.3 -C.sub.6 -cycloalkyl group that is optionally substituted by straight-chain or branched C.sub.1 -C.sub.4 -alkyl groups, andn is an integer from 0 to 5,by reacting a dialkyl carbonate with an optionally substituted benzyl alcohol in the presence of a catalyst, separating off the resulting reaction mixture from the catalyst, and subsequently reacting the separated reaction mixture with hydrazine hydrate.Type: GrantFiled: August 6, 1999Date of Patent: December 12, 2000Assignee: Bayer AktiengesellschaftInventors: Edwin Ritzer, Robert Sollner, Claus Dreisbach, Frank Jelitto
-
Patent number: 5756824Abstract: Alkyl carbazates of the formula R.sup.1 --O--CO--NH--NH.sub.2 (I) are prepared in an advantageous manner by reacting an alkyl carbazate of the formula R.sup.2 --O--CO--NH--NH.sub.2 (II) with alcohols of the formula R.sup.1 --OH (III) in the presence of a catalyst, where the symbols used in the formulae are as defined in the description.Type: GrantFiled: October 21, 1996Date of Patent: May 26, 1998Assignee: Bayer AktiengesellschaftInventors: Heinz Landscheidt, Edwin Ritzer, Alexander Klausener
-
Patent number: 5081288Abstract: Substituted 3,5-dichloro-2,4-difluoro-benzenes of the formula ##STR1## in which R represents nitro, amino (including the corresponding ammonium salts) or isocyanato, which can be prepared from 2,3,4,5-tetrachloro-nitrobenzene by means of the reaction, carried out initially, with alkali metal fluorides at elevated temperature in a polar, aprotic solvent, starting from a crude 2,3,4,5-tetrachloro-nitrobenzene containing 2,3,5,6-tetrachloro-nitrobenzene and/or 2,3,4,6-tetrachloro-nitrobenzene, and substituted 3,5-dichloro-2,4-difluoro-benzene being isolated from the reaction mixture at the nitro stage or, after reduction of the nitro group, at the amino stage or, after reduction and phosgenation of the amino group, at the isocyanate stage.Type: GrantFiled: October 10, 1990Date of Patent: January 14, 1992Assignee: Bayer AktiengesellschaftInventors: Heinz U. Blank, Edwin Ritzer
-
Patent number: 5068428Abstract: Cyclopropanecarboxamide can be prepared by reaction of a cyclopropanecarboxylic ester with NH.sub.3, in which the ester alcohol has 4-8 C atoms and can be straight-chain or branched and which process is carried out in the presence of catalytic amounts of an alkali metal alcoholate of a monohydric C.sub.1-C.sub.8 alcohol at 60.degree.-200.degree. C. in the absence of a hydrocarbon solvent.Type: GrantFiled: September 26, 1990Date of Patent: November 26, 1991Assignee: Bayer AktiengesellschaftInventors: Herbert Diehl, Heinz U. Blank, Edwin Ritzer
-
Patent number: 5032687Abstract: The present process for the preparation of cyclopropylamine by the so-called Hofmann degradation of cyclopropanecarboxamide is characterized in that the cyclopropanecarboxamide is employed in the form of a solution. The new process can be carried out at 5.degree.-35.degree. C. The cyclopropylamine is obtained after introducing the reaction mixture into a concentrated alkali metal hydroxide solution.Type: GrantFiled: October 18, 1989Date of Patent: July 16, 1991Assignee: Kernforschunganlage Julich Gesellschaft mit beschrankter Haftung.Inventors: Herbert Diehl, Heinz U. Blank, Edwin Ritzer
-
Patent number: 4868347Abstract: Substituted fluorobenzenes which are produced in aprotic, polar solvents or in mixtures which contain such solvents can be obtained by extracting the substituted fluorobenzenes from the solvents or solvent mixtures with aliphatic extracting agents and then seaprating the extracting agents from the substituted fluorobenzenes.Type: GrantFiled: December 9, 1987Date of Patent: September 19, 1989Assignee: Bayer AktiengesellschaftInventors: Heinz U. Blank, Edwin Ritzer