Patents by Inventor Hans-Jurgen Weyer
Hans-Jurgen Weyer 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: 6554966Abstract: The invention relates to a process for preparing essentially formic acid-free N-alkyl-N′-methylalkyleneureas of the formula with R1=H or CH3, R2=CnH2n+1 with n=1-4 and x=0 or 1, from the corresponding alkyleneureas by reaction with monomeric or polymerized formaldehyde in the presence of formic acid. This entails feeding the mixture, obtained in the reaction, of N-alkyl-N′-methylalkyleneurea and formic acid to the upper region of a distillation column, distilling without further additions and removing essentially formic acid-free N-alkyl-N′-methylalkyleneurea in the lower region of the column.Type: GrantFiled: June 26, 2000Date of Patent: April 29, 2003Assignee: BASF AktiengesellschaftInventors: Andreas Kramer, Johann-Peter Melder, Heinz Rütter, Günter Riewe, Wolfgang Siegel, Hans-Jürgen Weyer
-
Patent number: 6291731Abstract: In a continuous process for preparing propargyl chloride by reacting propargyl alcohol with a chlorinating agent in the presence of a catalyst, the chlorinating agent, propargyl alcohol and from 0.1 to 10 mol % of the catalyst, based on the amount of propargyl alcohol, are continuously metered into a reaction zone and reacted at from 40 to 70° C.Type: GrantFiled: August 29, 2000Date of Patent: September 18, 2001Assignee: BASF AktiengesellschaftInventors: Armin Stamm, Jochem Henkelmann, Hans-Jürgen Weyer
-
Patent number: 6262300Abstract: The present invention provides process for the preparation of chlorocarbonyl chlorides of the formula I R1—CHCl—Y—COCl (I), where R1 is for example hydrogen or C1- to C20-alkyl and Y is for example a saturated or mono- or polyolefinically unsaturated C2-C8-alkylene chain, by reacting lactones with a chlorinating agent in the presence of a urea compound.Type: GrantFiled: April 20, 2000Date of Patent: July 17, 2001Assignee: BASF AktiengesellschaftInventors: Hans-Jürgen Weyer, Armin Stamm, Theodor Weber, Jochem Henkelmann
-
Patent number: 6245954Abstract: The present invention relates to a process for preparing alkyl, alkenyl and alkynyl chlorides from alcohols by reaction with a chlorinating agent in the presence of a catalyst, wherein the catalyst is a urea compound.Type: GrantFiled: November 20, 2000Date of Patent: June 12, 2001Assignee: BASF AktiengesellschaftInventors: Hans-Jürgen Weyer, Armin Stamm, Theodor Weber, Jochem Henkelmann
-
Patent number: 6242639Abstract: A method for preparing neopentyl glycol hydroxypivalate granules by application of a neopentyl glycol hydroxypivalate melt (1) onto a cooling belt (6) on which the melt solidifies, wherein the melt contains at least so 3 wt % of neopentyl glycol hydroxypivalate crystals, based on the total amount of neopenlyl glycol hydroxypivalate.Type: GrantFiled: September 9, 1997Date of Patent: June 5, 2001Assignee: BASF AktiengesellschaftInventors: Hans-Jürgen Weyer, Bernd Eck, Dieter Baumann, Bernhard Maltry
-
Patent number: 6162939Abstract: A catalyst used for preparing thiochloroformates by reacting thiols with phosgene is a cyclic urea or cyclic thiourea which may be in the form of a salt obtainable by reaction with a hydrohalic acid or phosgene.Type: GrantFiled: February 17, 2000Date of Patent: December 19, 2000Assignee: BASF AktiengesellschaftInventors: Hans-Jurgen Weyer, Armin Stamm, Theodor Weber, Jochem Henkelmann
-
Patent number: 6153784Abstract: Halides are removed from halide-containing nitrile mixtures by(a) thermally treating the halide-containing nitrile mixture,(b) subsequently adding a base to the thermally treated nitrile mixture and(c) subsequently separating off the base from the nitrile mixture.Amines are prepared by(A) reacting alkyl halides with metal cyanides in an at least two-phase reaction medium in the presence of halide-containing phase-transfer catalysts to give alkanenitriles,(B) separating off the resulting halide-containing alkanenitrile mixture phase and(C) further treating the halide-containing alkanenitrile mixture phase, as described in the stages(a)-(c) removing halides from halide-containing nitrile mixtures and(d) hydrogenating nitrites obtained in stage (c) to give amines, in the presence of suspended or fixed-bed catalysts.Type: GrantFiled: February 17, 1998Date of Patent: November 28, 2000Assignee: BASF AktiengesellschaftInventors: Heinz-Josef Kneuper, Hans-Jurgen Weyer, Horst Neuhauser, Johann-Peter Melder, Andreas Henne, Karl-Heinz Ross, Rainer Becker
-
Patent number: 5965032Abstract: The process for purifying an .alpha.-, .beta.- or .gamma.-substituted carboxylic acid or a salt or an ester thereof or a mixture of two or more thereof from an aqueous solution which contains an .alpha.-, .beta.- or .gamma.-substituted carboxylic acid or a salt or an ester thereof or a mixture of two or more thereof and at least one polyol or at least one amino alcohol, wherein the solution is treated by electrodialysis.Type: GrantFiled: January 27, 1998Date of Patent: October 12, 1999Assignee: BASF AktiengesellschaftInventors: Markus Frede, Christian Dully, Klaus Ditrich, Johann-Peter Melder, Hans-Jurgen Weyer, Achim Weitze
-
Patent number: 5951829Abstract: A method of separating heteropoly compounds from mixtures of polyethers, polyesters and/or polyether esters, a protic component and heteropoly compounds, wherein the protic component is removed from the mixture and subsequently separating off the heteropoly compound as a separate phase. The polymer phase which remains is preferably brought into further contact with a solid adsorbent that is capable of adsorbing heteropoly compounds.Type: GrantFiled: March 27, 1997Date of Patent: September 14, 1999Assignee: BASF AktiengesellschaftInventors: Hans-Jurgen Weyer, Rolf Fischer, Gerhard Jeschek, Herbert Muller
-
Patent number: 5904814Abstract: A process for removing water and ammonia from benzophenone imine reactor effluents resulting from the catalytic reaction of benzophenones of the formula I ##STR1## where R.sup.1 and R.sup.2, have the meaning stated in the specification and wherein ammonia is distilled off from effluents and wherein water is either distilled off from the effluents over removed non-distillatively.Type: GrantFiled: October 15, 1997Date of Patent: May 18, 1999Assignee: BASF AktiengesellschaftInventors: Guido Voit, Matthias Dernbach, Karl Beck, Martin Holderbaum, Hans-Jurgen Weyer
-
Patent number: 5824769Abstract: A process is described for removing heteropoly compounds from heteropoly compound-contaminated polyethers, polyesters and/or polyether esters, which comprises admixing the polymer or a solution of the same with a compound which contains at least one heteroatom which is selected from the group consisting of central atoms of heteropolyacids, is non-protic and is of a polarity so low that its addition leads to the heteropoly compounds separating out in a separate phase, and separating off the precipitated heteropoly compound phase. The remaining polymer phase is preferably further purified using a solid adsorbent.Type: GrantFiled: August 4, 1997Date of Patent: October 20, 1998Assignee: BASF AktiengesellschaftInventors: Hans-Jurgen Weyer, Rolf Fischer
-
Patent number: 5770747Abstract: A process for the preparation of 1,2-butylene oxide by the catalytic hydrogenation of vinyl oxirane, in which use is made of a palladium catalyst on a support of barium sulfate, zirconium oxide or titanium dioxide or a rhenium-containing supported palladium catalyst.Type: GrantFiled: December 27, 1996Date of Patent: June 23, 1998Assignee: BASF AktiengesellschaftInventors: Peter Lingelbach, Joachim Roser, Christoph Sigwart, Werner Schnurr, Hans-Jurgen Weyer
-
Patent number: 5741888Abstract: A method of removing heteropoly compounds from polyethers, polyesters and/or polyether esters, which are contaminated with heteropoly compounds is described, which comprises adding, to the polymers or a solution thereof, an ether whose polarity is so low that its addition leads to the deposition of the heteropoly compound in a separate phase, and separating off the precipitated heteropoly compound phase. The polymer phase which remains is preferably purified further using a solid adsorbent.Type: GrantFiled: March 27, 1997Date of Patent: April 21, 1998Assignee: BASF AktiengesellschaftInventors: Hans-Jurgen Weyer, Rolf Fischer
-
Patent number: 4349348Abstract: Improved textile materials are produced having white or variously colored designs on a colored substrate on textile materials containing hydrophobic, synthetic fibers by impregnating the materials with dye liquors containing dyeing and padding auxiliaries as well as dyestuffs dischargeable to white, drying or incipiently drying the impregnated materials and then printing a desired pattern onto the materials with a discharge reserve paste containing a discharging agent, and subsequently subjecting the materials to a heat treatment at temperatures from 100.degree. to 230.degree. C., the improvement comprises the dyestuffs dischargeable to white being dyestuffs of the formula ##STR1## wherein n is a number from 1 to 9; and said discharging agent being a base which produces a pH value of at least 8 in a 5% strength aqueous solution.Type: GrantFiled: May 18, 1981Date of Patent: September 14, 1982Assignee: Cassella AktiengesellschaftInventors: Horst Tappe, Horst Kindler, Kurt Roth, Hans-Jurgen Weyer
-
Patent number: 4265629Abstract: In the process for production of resist effects on textile materials of mixed fibers of polyester and cellulose comprising impregnating the materials with a dye liquor containing disperse dyestuffs and reactive dyestuffs which react with the resisting agents, drying or partially drying the padded materials and subsequently printing a resist paste on the material, and heat-treating the materials the improvement comprises the dischargeable disperse dyestuffs being of a class of dyestuffs of which an exemplary species is ##STR1## one of the tautomeric forms of a class of dyestuffs of which an exemplary species is ##STR2## or disperse dyestuffs which are free from groups conferring solubility in water and which contain at least two carboxylic acid ester moieties.Type: GrantFiled: December 19, 1979Date of Patent: May 5, 1981Assignee: Cassella AktiengesellschaftInventors: Joachim Ribka, Horst Tappe, Kurt Roth, Hans-Jurgen Weyer
-
Patent number: 4252530Abstract: White patterns on synthetic fiber textiles or patterns of a different color on a colored background are produced by dyeing the material with a dyestuff dischargeable to white, drying the material, printing the material with a discharge resist paste and heating the treated material to 100.degree.-230.degree. C. wherein the discharge agent is a base which produces a pH of at least 8 in a 5% strength aqueous solution.Type: GrantFiled: August 14, 1979Date of Patent: February 24, 1981Assignee: Cassella AktiengesellschaftInventors: Joachim Ribka, Horst Tappe, Kurt Roth, Hans-Jurgen Weyer