Patents by Inventor Katrin Baumann
Katrin Baumann 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: 9790304Abstract: The present invention relates to a process for producing water-absorbent polymer particles by polymerizing droplets of a monomer solution comprising less than 0.3% by weight of persulfate and at least 0.05% by weight of azo initiator and thermal aftertreatment of the formed polymer particles at less than 100° C. in a fluidized bed for 60 to 300 minutes.Type: GrantFiled: November 11, 2013Date of Patent: October 17, 2017Assignee: BASF SEInventors: Thomas Daniel, Norbert Herfert, Stephan Bauer, Katrin Baumann, Birgit Reinhard, Jürgen Freiberg, Rudolf Schliwa
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Publication number: 20160272745Abstract: The present invention relates to a process for producing water-absorbent polymer particles by polymerizing droplets of a monomer solution comprising less than 0.3% by weight of persulfate and at least 0.05% by weight of azo initiator and thermal aftertreatment of the formed polymer particles at less than 100° C. in a fluidized bed for 60 to 300 minutes.Type: ApplicationFiled: November 11, 2013Publication date: September 22, 2016Inventors: Thomas Daniel, Norbert Herfert, Stephan Bauer, Katrin Baumann, Birgit Reinhard, Jürgen Freiberg, Rudolf Schliwa
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Publication number: 20150299404Abstract: The present invention relates to a process for producing surface-postcrosslinked water-absorbent polymer particles by coating of water-absorbent polymer particles having a content of residual monomers in the range from 0.03 to 15% by weight with at least one surface-postcrosslinker and thermal surface-postcrosslinking at temperatures in the range from 100 to 180° C.Type: ApplicationFiled: November 7, 2013Publication date: October 22, 2015Inventors: Thomas Daniel, Norbert Herfert, Stephan Bauer, Katrin Baumann, Birgit Reinhard, Jürgen Freiberg, Christophe Bauduin, Katarzyna Dobrosielska-Oura, Michael A. Mitchell
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Patent number: 8440852Abstract: The invention relates to a process for preparing tetraethylenepentamine (TEPA) by hydrogenation of diethylenetriaminediacetonitrile (DETDN) over a catalyst. If appropriate, DETDN can also be present as a constituent of an amino nitrile mixture which additionally comprises diethylenetriaminemonoacetonitrile (DETMN).Type: GrantFiled: February 27, 2008Date of Patent: May 14, 2013Assignee: BASF SEInventors: Kirsten Dahmen, Alfred Oftring, Randolf Hugo, Thilo Hahn, Katrin Baumann, Johann-Peter Melder
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Patent number: 8299249Abstract: The invention relates to a process for preparing triethylenetetramine (TETA), which, comprises the following steps: a) reaction of ethylenediamine (EDA) with formaldehyde and hydrocyanic acid (HCN) in a molar ratio of EDA to formaldehyde to HCN of from 1:1.5:1.5 to 1:2:2 to give ethylenediaminediacetonitrile (EDDN), b) hydrogenation of the EDDN obtained in step a) in the presence of a catalyst and a solvent.Type: GrantFiled: February 28, 2008Date of Patent: October 30, 2012Assignee: BASF SEInventors: Kirsten Dahmen, Alfred Oftring, Katrin Baumann, Randolf Hugo, Thilo Hahn, Johann-Peter Melder
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Patent number: 8153845Abstract: The invention relates to a process for preparing an amino nitrile mixture comprising aminoacetonitrile (AAN) and from 5 to 70% by weight of iminodiacetonitrile (IDAN), which comprises heating crude AAN which is largely free of formaldehyde cyanohydrin (FACH-free) at a temperature of from 50 to 150° C.Type: GrantFiled: February 28, 2008Date of Patent: April 10, 2012Assignee: BASF SEInventors: Alfred Oftring, Kirsten Dahmen, Thilo Hahn, Randolf Hugo, Katrin Baumann, Johann-Peter Melder
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Patent number: 7960590Abstract: The invention relates to a process for preparing an ethylene amine mixture, which comprises the following steps: a) crude AAN which is largely free of formaldehyde cyanohydrin (largely FACH-free) is heated at a temperature of from 50 to 150° C. to give an amino nitrile mixture comprising aminoacetonitrile (AAN) and from 5 to 70% by weight of iminodiacetonitrile (DAN), b) hydrogenation of the amino nitrile mixture obtained in step a) in the presence of a catalyst. Ethylenediamine (EDA) and/or diethylenetriamine (DETA) and also, if appropriate, further ethylene amines can be isolated from the ethylene amine mixtures obtained.Type: GrantFiled: February 28, 2008Date of Patent: June 14, 2011Assignee: BASF SEInventors: Kirsten Dahmen, Alfred Oftring, Randolf Hugo, Thilo Hahn, Katrin Baumann, Johann-Peter Melder
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Patent number: 7960591Abstract: The invention relates to a process for preparing triethylenetetramine (TETA), which comprises hydrogenating ethylenediaminediacetonitrile (EDDN) in the presence of a catalyst and a solvent.Type: GrantFiled: February 27, 2008Date of Patent: June 14, 2011Assignee: BASF SEInventors: Kirsten Dahmen, Alfred Oftring, Randolf Hugo, Katrin Baumann, Thilo Hahn, Johann-Peter Melder
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Patent number: 7915454Abstract: The invention relates to a process for preparing ethylenediamine by hydrogenation of aminoacetonitrile over a catalyst, wherein the hydrogenation is carried out in a solution comprising aminoacetonitrile, water in a proportion of from 0 to 60% by weight and a solvent and the aminoacetonitrile comprised in the solution is fed into the reaction vessel at a rate which is not greater than the rate at which the aminoacetonitrile reacts with hydrogen in the hydrogenation.Type: GrantFiled: February 28, 2008Date of Patent: March 29, 2011Assignee: BASF SEInventors: Alfred Oftring, Kirsten Dahmen, Randolf Hugo, Thilo Hahn, Katrin Baumann, Johann-Peter Melder
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Patent number: 7880036Abstract: The invention relates to a process for preparing an ethylene amine mixture, which comprises hydrogenating an amino nitrile mixture comprising at least two ?-amino nitriles in an amount of at least 5% by weight in each case in the presence of a catalyst and, if appropriate, a solvent.Type: GrantFiled: February 27, 2008Date of Patent: February 1, 2011Assignee: BASF SEInventors: Kirsten Dahmen, Alfred Oftring, Katrin Baumann, Randolf Hugo, Thilo Hahn, Johann-Peter Melder
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Patent number: 7880035Abstract: The invention relates to a process for preparing an ethylene amine mixture, which comprises hydrogenating an amino nitrile mixture comprising at least 30% by weight of aminoacetonitrile (AAN) and at least 5% by weight of iminodiacetonitrile (IDAN) in the presence of a catalyst. Ethylenediamine (EDA) and/or diethylenetriamine (DETA) and, if appropriate, further ethylene amines can be isolated from the ethylene amine mixtures obtained.Type: GrantFiled: February 28, 2008Date of Patent: February 1, 2011Assignee: BASF SEInventors: Alfred Oftring, Kirsten Dahmen, Thilo Hahn, Randolf Hugo, Katrin Baumann, Johann-Peter Melder
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Publication number: 20100121064Abstract: The invention relates to a process for preparing triethylenetetramine (TETA), which, comprises the following steps: a) reaction of ethylenediamine (EDA) with formaldehyde and hydrocyanic acid (HCN) in a molar ratio of EDA to formaldehyde to HCN of from 1:1.5:1.5 to 1:2:2 to give ethylenediaminediacetonitrile (EDDN), b) hydrogenation of the EDDN obtained in step a) in the presence of a catalyst and a solvent.Type: ApplicationFiled: February 28, 2008Publication date: May 13, 2010Applicant: BASF SEInventors: Kirsten Dahmen, Alfred Oftring, Katrin Baumann, Randolf Hugo, Thilo Hahn, Johann-Peter Melder
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Publication number: 20100099872Abstract: The invention relates to a process for preparing an ethylene amine mixture, which comprises hydrogenating an amino nitrile mixture comprising at least two ?-amino nitriles in an amount of at least 5% by weight in each case in the presence of a catalyst and, if appropriate, a solvent.Type: ApplicationFiled: February 27, 2008Publication date: April 22, 2010Applicant: BASF SEInventors: Kirsten Dahmen, Alfred Oftring, Katrin Baumann, Randolf Hugo, Thilo Hahn, Johann-Peter Melder
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Publication number: 20100094057Abstract: The invention relates to a process for preparing ethylenediamine by hydrogenation of aminoacetonitrile over a catalyst, wherein the hydrogenation is carried out in a solution comprising aminoacetonitrile, water in a proportion of from 0 to 60% by weight and a solvent and the aminoacetonitrile comprised in the solution is fed into the reaction vessel at a rate which is not greater than the rate at which the aminoacetonitrile reacts with hydrogen in the hydrogenation.Type: ApplicationFiled: February 28, 2008Publication date: April 15, 2010Applicant: BASF SEInventors: Alfred Oftring, Kirsten Dahmen, Randolf Hugo, Thilo Hahn, Katrin Baumann, Johann-Peter Melder
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Patent number: 7674934Abstract: A process for preparing N-alkenyl compounds by reacting the corresponding NH compounds with alkynes in the liquid phase in the presence of a catalyst, wherein the reaction is carried out in the presence of at least one stabilizer, and the use of stabilizers for increasing the selectivity in a process for preparing N-alkenyl compounds by reacting the corresponding NH compounds with alkynes in the liquid phase in the presence of a catalyst.Type: GrantFiled: August 4, 2005Date of Patent: March 9, 2010Assignee: BASF AktiengesellschaftInventors: Frank Hoefer, Alexandra Brand, Arnd Boettcher, Katrin Baumann, Regina Vogelsang
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Publication number: 20100056828Abstract: The invention relates to a process for preparing an ethylene amine mixture, which comprises hydrogenating an amino nitrile mixture comprising at least 30% by weight of aminoacetonitrile (AAN) and at least 5% by weight of iminodiacetonitrile (IDAN) in the presence of a catalyst. Ethylenediamine (EDA) and/or diethylenetriamine (DETA) and, if appropriate, further ethylene amines can be isolated from the ethylene amine mixtures obtained.Type: ApplicationFiled: February 28, 2008Publication date: March 4, 2010Applicant: BASF SEInventors: Alfred Oftring, Kirsten Dahmen, Thilo Hahn, Randolf Hugo, Katrin Baumann, Johann-Peter Melder
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Publication number: 20100029991Abstract: The invention relates to a process for preparing triethylenetetramine (TETA), which comprises hydrogenating ethylenediaminediacetonitrile (EDDN) in the presence of a catalyst and a solvent.Type: ApplicationFiled: February 27, 2008Publication date: February 4, 2010Applicant: BASF SEInventors: Kirsten Dahmen, Alfred Oftring, Randolf Hugo, Katrin Baumann, Thilo Hahn, Johann-Peter Melder
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Publication number: 20100029976Abstract: The invention relates to a process for preparing tetraethylenepentamine (TEPA) by hydrogenation of diethylenetriaminediacetonitrile (DETDN) over a catalyst. If appropriate, DETDN can also be present as a constituent of an amino nitrile mixture which additionally comprises diethylenetriaminemonoacetonitrile (DETMN).Type: ApplicationFiled: February 27, 2008Publication date: February 4, 2010Applicant: BASF SEInventors: Kirsten Dahmen, Alfred Oftring, Randolf Hugo, Thilo Hahn, Katrin Baumann, Johann-Peter Melder
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Publication number: 20100016625Abstract: The invention relates to a process for preparing an amino nitrile mixture comprising aminoacetonitrile (AAN) and from 5 to 70% by weight of iminodiacetonitrile (IDAN), which comprises heating crude AAN which is largely free of formaldehyde cyanohydrin (FACH-free) at a temperature of from 50 to 150° C.Type: ApplicationFiled: February 28, 2008Publication date: January 21, 2010Applicant: BASF SEInventors: Alfred Oftring, Kirsten Dahmen, Thilo Hahn, Randolf Hugo, Katrin Baumann, Johann-Peter Melder
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Publication number: 20080312432Abstract: A process for preparing N-alkenyl compounds by reacting the corresponding NH compounds with alkynes in the liquid phase in the presence of a catalyst, wherein the reaction is carried out in the presence of at least one stabilizer, and the use of stabilizers for increasing the selectivity in a process for preparing N-alkenyl compounds by reacting the corresponding NH compounds with alkynes in the liquid phase in the presence of a catalyst.Type: ApplicationFiled: August 4, 2005Publication date: December 18, 2008Applicant: BASF AktiengesellschaftInventors: Frank Hofer, Alexandra Brand, Arnd Bottcher, Katrin Baumann, Regina Vogelsang