Patents by Inventor Shelue Liang
Shelue Liang 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: 20240010597Abstract: A process for the preparation of a color stable C6-12 saturated aliphatic carboxylic acid in which (1) the corresponding aldehyde is oxidized with molecular oxygen to obtain the crude saturated aliphatic carboxylic acid in a liquid mixture, (2) molecular oxygen removed from the crude saturated aliphatic carboxylic acid mixture, and (3) the saturated aliphatic carboxylic acid separated from the molecular oxygen depleted mixture by distillation as a color stable product.Type: ApplicationFiled: August 9, 2021Publication date: January 11, 2024Inventors: Jessica Nadine HAMANN, Joaquim Henrique TELES, Peter Georg OHLEMUELLER, Friedemann GAITZSCH, Shelue LIANG, Stefan RITTINGER, Frauke THRUN, Richard DEHN
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Publication number: 20230391542Abstract: A container and a process for the degradation stable storage and transport of a liquid comprising a saturated aliphatic C6-12 carboxylic acid in which the liquid is covered with an oxygen free or at least heavily oxygen depleted inert gas phase atmosphere above the liquid.Type: ApplicationFiled: October 12, 2021Publication date: December 7, 2023Inventors: Joaquim Henrique TELES, Jessica Nadine HAMANN, Shelue LIANG, Stefan RITTINGER
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Publication number: 20230047974Abstract: A process for the preparation of a saturated aliphatic carboxylic acid with 3 to 5 carbon atoms by oxidation of the corresponding aldehyde with oxygen in which (a) the corresponding aldehyde is converted with oxygen at a temperature of 40 to 150° C. and an oxygen partial pressure of 0.001 to 1 MPa to obtain a mixture containing the saturated aliphatic carboxylic acid and ?2 mol-% of the corresponding aldehyde with respect to the saturated aliphatic carboxylic acid, (b) the mixture obtained in step (a) is thermally treated in the liquid phase at a temperature of 80 to 250° C. and a pressure of 0.1 to 2 MPa abs for 0.25 to 100 hours, and (c) the mixture obtained in step (b) is distilled in a distillation apparatus to obtain a distillate containing ?90 wt.-% of the saturated aliphatic carboxylic acid and having an active oxygen content of 0 to 25 wt.-ppm based on the distillate.Type: ApplicationFiled: December 29, 2020Publication date: February 16, 2023Inventors: Joaquim Henrique TELES, Jessica Nadine HAMANN, Jonathan Thomas LEFEBVRE, Wolf-Steffen WEISSKER, Shelue LIANG
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Patent number: 7405327Abstract: Process for the continuous preparation of an amine by reaction of a primary or secondary alcohol, aldehyde and/or ketone with hydrogen and a nitrogen compound selected from the group consisting of ammonia, primary and secondary amines at a temperature in the range from 60 to 300° C.Type: GrantFiled: May 4, 2005Date of Patent: July 29, 2008Assignee: BASF AktiengesellschaftInventors: Frank Haese, Arnd Bottcher, Bernd Stein, Wolfgang Reif, Johann-Peter Melder, Karl-Heinz Roβ, Heinz Rutter, Shelue Liang, Stefan Rittinger
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Publication number: 20070232833Abstract: Process for the continuous preparation of an amine by reaction of a primary or secondary alcohol, aldehyde and/or ketone with hydrogen and a nitrogen compound selected from the group consisting of ammonia, primary and secondary amines at a temperature in the range from 60 to 300° C in the presence of a copper-containing catalyst, wherein the catalytically active composition of the catalyst prior to reduction with hydrogen comprises from 20 to 85% by weight of aluminum oxide (Al2O3), zirconium dioxide (ZrO2), titanium dioxide (TiO2) and/or silicon dioxide (SiO2), from 1 to 70% by weight of oxygen-containing compounds of copper, calculated as CuO, from 0 to 50% by weight of oxygen-containing compounds of magnesium, calculated as MgO, oxygen-containing compounds of chromium, calculated as Cr2O3, oxygen-containing compounds of zinc, calculated as ZnO, oxygen-containing compounds of barium, calculated as BaO, and/or oxygen-containing compounds of calcium, calculated as CaO, and less than 30% by weight of oxygen-Type: ApplicationFiled: May 4, 2005Publication date: October 4, 2007Applicant: BASF AktiengesellschaftInventors: Frank Haese, Arnd Bottcher, Bernd Stein, Wolfgang Reif, Johann-Peter Melder, Karl-Heinz Ross, Heinz Rutter, Shelue Liang, Stefan Rittinger
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Patent number: 7084312Abstract: A process for the hydrogenation of an organic compound containing at least one carbonyl group comprises bringing the organic compound in the presence of hydrogen into contact with a shaped body which can be produced by a process in which (i) an oxidic material comprising copper oxide, zinc oxide and aluminum oxide is made available, (ii) pulverulent metallic copper or pulverulent cement or a mixture thereof is added to the oxidic material, and (iii) the mixture resulting from (ii) is shaped to form a shaped body.Type: GrantFiled: August 22, 2000Date of Patent: August 1, 2006Assignee: BASF AktiengesellschaftInventors: Sylvia Huber, Michael Jolyon Sprague, Boris Breitscheidel, Joachim Wulff-Döring, Michael Hesse, Rolf Pinkos, Shelue Liang, Otto Kumberger, Marc Walter
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Patent number: 6828464Abstract: The present invention provides a process for preparing 2-cyclopentenones of the general formula: where R1 to R4 are each hydrogen atoms or are alkyl or alkenyl radicals having from 1 to 12 carbon atoms, cycloalkyl or cycloalkenyl radicals having from 5 to 7 carbon atoms, aralkylene or aryl radicals, by converting hexenedioic acids and/or their esters of the general formulae where R1 to R4 are each as defined above and R5 and R6 are each hydrogen atoms or are alkyl radicals having from 1 to 12 carbon atoms, cycloalkyl radicals having 5 or 6 carbon atoms, aralkyl or aryl radicals, at temperatures of from 150 to 450° C., over solid, oxidic catalysts, wherein the catalysts on an oxidic support material comprise from 0.01 to 5% by weight of at least one alkali metal oxide.Type: GrantFiled: November 24, 2003Date of Patent: December 7, 2004Assignee: BASF AktiengesellschaftInventors: Shelue Liang, Rolf-Hartmuth Fischer, Sylvia Huber-Dirr, Andrea Haunert
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Publication number: 20040102655Abstract: The present invention provides a process for preparing 2-cyclopentenones of the general formula: 1Type: ApplicationFiled: November 24, 2003Publication date: May 27, 2004Inventors: Shelue Liang, Rolf-Hartmuth Fischer, Sylvia Huber-Dirr, Andrea Haunert
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Patent number: 6689914Abstract: The preparation of amines of the formula (I): R1R2CH—N R3R4 (I) in which R1, R2, R3 and R4, independently of one another, are hydrogen, straight-chain or branched C1-C12-alkyl, C3-C12-cycloalkyl, C6-C10-aryl or C7-C11-aralkyl, takes place by catalytic, reductive amination of mixtures comprising carbonyl compounds of the formula (II) and/or alcohols of the formula (III) R1—C(═O)—R2 (II) R1—CH(OH)—R2 (III) which also comprise at least 50 ppm, based on the mixtures, of halogen, with nitrogen compounds of the formula (IV): H N R3 R4 (IV) with the abovementioned meanings for R1 to R4, in the presence of Co- and/or Ni-containing catalysts, which comprises carrying out the reductive amination additionally in the presence of solid acidic cocatalysts.Type: GrantFiled: September 5, 2002Date of Patent: February 10, 2004Assignee: BASF AktiengesellschaftInventors: Martin Schäfer, Arnd Böttcher, Andreas Kramer, Arthur Höhn, Shelue Liang, Frank Funke
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Patent number: 6576795Abstract: Optically active amines of the formula I where R1 and R2 are different and R1, R2, R3 are alkyl, cycloalkyl, arylalkyl, aryl, heteroaryl and heterocyclic radicals and R3 may also be hydrogen (H), with the radicals being able to bear substituents selected from the group consisting of alkyl, cycloalkyl, alkoxy, aryloxy, amino, alkylamino and dialkylamino, are racemized by reacting the optically active amine I in the presence of hydrogen and a hydrogenation or dehydrogenation catalyst at elevated temperature, wherein the catalyst comprises the active components copper and zinc oxide and a support material.Type: GrantFiled: October 1, 2002Date of Patent: June 10, 2003Assignee: BASF AktiengesellschaftInventors: Frank Funke, Shelue Liang, Andreas Kramer, Rainer Stürmer, Arthur Höhn
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Publication number: 20030097021Abstract: The preparation of amines of the formula (I)Type: ApplicationFiled: September 5, 2002Publication date: May 22, 2003Inventors: Martin Schafer, Arnd Bottcher, Andreas Kramer, Arthur Hohn, Shelue Liang, Frank Funke
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Patent number: 6548704Abstract: Optically active amines of the formula I where R1 and R2 are different and R1, R2, R3 are alkyl, cycloalkyl, arylalkyl, aryl, heteroaryl and heterocyclic radicals and R3 may also be hydrogen (H), with the radicals being able to bear substituents selected from the group consisting of alkyl, cycloalkyl, alkoxy, aryloxy, amino, alkylamino and dialkylamino, are racemized by reacting the optically active amine I in the presence of hydrogen and a hydrogenation or dehydrogenation catalyst at elevated temperature, wherein the catalyst comprises the active components copper and zinc oxide and a support material.Type: GrantFiled: December 12, 2001Date of Patent: April 15, 2003Assignee: BASF AktiengesellschaftInventors: Frank Funke, Shelue Liang, Andreas Kramer, Rainer Stürmer, Arthur Höhn
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Patent number: 6462236Abstract: Amines of the formula (I) R1R2CH—NR3R4 (I) where R1, R2, R3 and R4 are each, independently of one another, hydrogen, straight-chain or branched C1-C12-alkyl, C3-C12-cycloalkyl, C6-C10-aryl or C7-C11-aralkyl, where at least one of the radicals R1 and R2 is aryl or aralkyl whose aromatic unit is substituted by at least one halogen, are prepared by catalytic, hydrogenative amination of carbonyl compounds of the formula (II) or alcohols of the formula (III) R1—C(═O)—R2 (II) R1—CH(OH)—R2 (III) by means of nitrogen compounds of the formula (IV) HNR3R4 (IV) where R1 to R4 are as defined above, in the presence of Co- and/or Ni-containing catalysts, in the additional presence of solid acid cocatalysts and in the absence of organic sulfur compounds.Type: GrantFiled: October 24, 2001Date of Patent: October 8, 2002Assignee: BASF AktiengesellschaftInventors: Shelue Liang, Frank Funke, Arthur Höhn
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Publication number: 20020120166Abstract: Optically active amines of the formula I 1Type: ApplicationFiled: December 12, 2001Publication date: August 29, 2002Inventors: Frank Funke, Shelue Liang, Andreas Kramer, Rainer Sturmer, Arthur Hohn
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Patent number: 6429339Abstract: A process for preparing cyclopentanone by reacting adipic esters of the formula R1OOC—(CH2)4—COOR2 I where R1 and R2 are each alkyl having from 1 to 12 carbon atoms, cycloalkyl having 5 or 6 carbon atoms, aralkyl or aryl and R2 may additionally be hydrogen, in the presence of oxidic catalysts comprises reacting adipic esters of the formula I having less than 5% by weight of by-products other than adipic esters in the gas phase in the presence of water, a carrier gas and a) from 0.01 to 10% by weight of at least one metal oxide selected from the first or second main group of the periodic table or from the group of the rare earth metals on titanium dioxide or zirconium dioxide as catalyst support, or b) from 0.01 to 50% by weight of at least one metal oxide selected from the second main group of the periodic table on zink oxide as catalyst support.Type: GrantFiled: November 15, 2000Date of Patent: August 6, 2002Assignee: BASF AktiengesellschaftInventors: Shelue Liang, Rolf Fischer, Frank Stein, Joachim Wulff-Döring
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Publication number: 20020082455Abstract: Amines of the formula (I)Type: ApplicationFiled: October 24, 2001Publication date: June 27, 2002Inventors: Shelue Liang, Frank Funke, Arthur Hohn
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Patent number: 6407294Abstract: A process for producing 1,6-hexanediol by hydrogenation of adipic esters and/or 6-hydroxycaproic esters in the gas phase at elevated temperature and elevated pressure in the presence of chromium-free catalysts comprises hydrogenating a) over a catalyst comprising copper, manganese and aluminum as essential constituents or over Raney copper, b) at a temperature of from 150 to 230° C. and a pressure of from 10 to 70 bar, c) at a molar ratio of hydrogen to ester to be hydrogenated within the range from 150:1 to 300:1, and d) at a catalyst space velocity of from 0.01 to 0.3 kg of C6 ester per liter of catalyst per hour.Type: GrantFiled: April 20, 2000Date of Patent: June 18, 2002Assignee: BASF AktiengesellschaftInventors: Boris Breitscheidel, Rolf Pinkos, Frank Stein, Shelue Liang, Rolf Hartmuth Fischer
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Patent number: 6387224Abstract: A process for the separation by distillation of a mixture of 1,4-butanediol and at least one 4-hydroxybutyraldehyde, its cyclic hemiacetal and its cyclic full acetals with at least one further alcohol by carrying out the distillation in the presence of an alkaline compound. The mixture to be separated preferably contains a cyclic full acetal of 4-hydroxybutyraldehyde with a further alcohol which has a lower boiling point than butanediol and also the further alcohol in free form. The process is particularly suitable for the separation by distillation of mixtures formed in the hydrogenation of maleic acid derivatives.Type: GrantFiled: August 29, 2000Date of Patent: May 14, 2002Assignee: BASF AktiengesellschaftInventors: Rolf Pinkos, Rolf Fischer, Shelue Liang
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Patent number: 6384154Abstract: A process for preparing halogen-free, reactive polyisobutene having a terminal double bond content of more than 60 mol % and an average molecular weight Mn of 800-3000 dalton by cationic polymerization in the liquid phase of isobutene over an acidic, essentially halogen-free heterogeneous catalyst, where a) a hydrocarbon mixture of essentially C4-hydrocarbons comprising isobutene in an amount of from 10 to 80% by weight is used as the starting material and b) polymerization is carried out continuously at from −30 to 0° C. with average starting material residence times of one hour or less, where the temperature and the residence time are selected such that the isobutene conversion is less than 60% and, after separation from the resulting polyisobutene, the isobutene is either enriched in the partially converted hydrocarbon mixture and returned to the polymerization or passed to another isobutene reaction coupled with the polymerization.Type: GrantFiled: January 31, 2001Date of Patent: May 7, 2002Assignee: BASF AktiengesellschaftInventors: Christoph Sigwart, Thomas Narbeshuber, Eugen Gehrer, Rolf Fischer, Ulrich Steinbrenner, Shelue Liang
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Patent number: 6316659Abstract: A process for preparing cyclopentanone and cyclopentene-1-carboxylic acid or an ester thereof of the formula I where R is hydrogen or an aliphatic radical having 1-6 carbon atoms or a cycloaliphatic, araliphatic or aromatic radical having 6-12 carbon atoms comprises heating a compound of the formula II X—(CH2)4—COOR II where X is formyl or hydroxymethyl and R is defined as above, and/or a compound which is converted into a compound of the formula II by reaction with water or alcohols ROH under the reaction conditions to from 200 to 450° C. in the gas or liquid phase in the presence of a heterogeneous oxidic catalyst.Type: GrantFiled: March 7, 2000Date of Patent: November 13, 2001Assignee: BASF AktiengesellschaftInventors: Rolf Fischer, Shelue Liang, Rolf Pinkos, Frank Stein