Patents by Inventor Ragavendra Prasad Balegedde Ramachandran
Ragavendra Prasad Balegedde Ramachandran 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: 10647639Abstract: The invention relates to a method for producing butadiene from n-butenes having the steps: A) providing an n-butene-comprising feed gas stream a; B) feeding the n-butene-comprising feed gas stream a and an oxygen-comprising gas into at least one oxidative dehydrogenation zone and oxidatively dehydrogenating n-butenes to butadiene, wherein a product gas stream b comprising butadiene, unreacted n-butenes, steam, oxygen, low-boiling hydrocarbons, high-boiling minor components, optionally carbon oxides and optionally inert gases is obtained; Ca) cooling the product gas stream b by contacting it with a refrigerant and condensing at least a part of the high-boiling minor components; Cb) compressing the remaining product gas stream b in at least one compression step, wherein at least one aqueous condensate stream c1 and a gas stream c2 comprising butadiene, n-butenes, steam, oxygen, low-boiling hydrocarbons, optionally carbon oxides and optionally inert gases is obtained; Da) separating off non-condensable and loType: GrantFiled: January 30, 2017Date of Patent: May 12, 2020Assignees: BASF SE, Linde AGInventors: Jan Pablo Josch, Ragavendra Prasad Balegedde Ramachandran, Ulrike Wenning, Anton Wellenhofer, Christine Toegel, Hendrik Reyneke, Heinz Boelt
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Patent number: 10421700Abstract: The invention relates to a process for producing butadiene from n-butenes which comprises the steps of: A) providing a vaporous n-butenes-comprising input gas stream a1 by evaporating a liquid n-butenes-comprising stream a0; B) introducing the vaporous n-butenes-comprising input gas stream a1 and an at least oxygenous gas into at least one oxidative dehydrogenation zone and oxidatively dehydrogenating n-butenes to butadiene to obtain a product gas stream b comprising butadiene, unconverted n-butenes, steam, oxygen, low-boiling hydrocarbons, high-boiling secondary components, possibly carbon oxides and possibly inert gases, Ca) chilling the product gas stream b by contacting with a cooling medium comprising an organic solvent in at least one chilling zone, the cooling medium being at least partially recycled into the chilling zone, Cb) compressing the chilled product gas stream b which is possibly depleted of high-boiling secondary components in at least one compression stage to obtain at least one aqueous cType: GrantFiled: March 23, 2016Date of Patent: September 24, 2019Assignee: BASF SEInventors: Jan Pablo Josch, Ragavendra Prasad Balegedde Ramachandran, Christian Walsdorff, Regina Benfer, Anton Wellenhofer, Ulrike Wenning, Heinz Boelt, Hendrik Reyneke, Christine Toegel
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Publication number: 20190039971Abstract: The invention relates to a method for producing butadiene from n-butenes having the steps: A) providing an n-butene-comprising feed gas stream a; B) feeding the n-butene-comprising feed gas stream a and an oxygen-comprising gas into at least one oxidative dehydrogenation zone and oxidatively dehydrogenating n-butenes to butadiene, wherein a product gas stream b comprising butadiene, unreacted n-butenes, steam, oxygen, low-boiling hydrocarbons, high-boiling minor components, optionally carbon oxides and optionally inert gases is obtained; Ca) cooling the product gas stream b by contacting it with a refrigerant and condensing at least a part of the high-boiling minor components; Cb) compressing the remaining product gas stream b in at least one compression step, wherein at least one aqueous condensate stream c1 and a gas stream c2 comprising butadiene, n-butenes, steam, oxygen, low-boiling hydrocarbons, optionally carbon oxides and optionally inert gases is obtained; Da) separating off non-condensable and loType: ApplicationFiled: January 30, 2017Publication date: February 7, 2019Inventors: JAN Pablo JOSCH, Ragavendra Prasad BALEGEDDE RAMACHANDRAN, Ulrike WENNING, Anton WELLENHOFER, Christine TOEGEL, Hendrik REYNEKE, Heinz BOELT
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Publication number: 20180354872Abstract: A) provision of a feed gas stream a comprising n-butenes; B) introduction of the feed gas stream a comprising n-butenes and an oxygen-comprising gas into a dehydrogenation reactor and oxidative dehydrogenation of n-butenes to butadiene; C) cooling and compression of the product gas stream b in at least one cooling stage comprising a quenching column and in a compression stage comprising a compressor, with the product gas stream b being brought into contact with at least one circulated coolant; D) separation of incondensable and low-boiling gas constituents as gas stream d2 from the gas stream c2 by absorption of the C4-hydrocarbons in at least one circulated absorption medium; E) separation of the C4 product stream d1 by extractive distillation using a solvent which is selective for butadiene into a stream e1 comprising butadiene and the selective solvent and a stream e2 comprising n-butenes; F) distillation of the stream e1 comprising butadiene and the selective solvent to give a stream f1 consisting essentiType: ApplicationFiled: December 2, 2016Publication date: December 13, 2018Inventors: Jan Pablo JOSCH, Ragavendra Prasad BALEGEDDE RAMACHANDRAN, Philipp GRUENE, Steffan RISSEL, Martin GEMBALA, Ulrike WENNING, Anton WELLENHOFER, Christine TOEGEL, Hendrik REYNEKE
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Patent number: 10144681Abstract: A process for the oxidative dehydrogenation of n-butenes to butadiene is disclosed herein, in which the formation of butadiene peroxides from butadiene in the work-up of the product gas mixture from the oxidative dehydrogenation is effectively prevented.Type: GrantFiled: January 8, 2014Date of Patent: December 4, 2018Assignee: BASF SEInventors: Jan Pablo Josch, Alexander Weck, Sonja Giesa, Steffen Bütehorn, Ragavendra Prasad Balegedde Ramachandran, Regina Benfer, Markus Weber
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Patent number: 9963408Abstract: A process for preparing butadiene from n-butenes, comprising the steps of: absorbing C4 hydrocarbons comprising butadiene and n-butenes, obtained from oxidative dehydrogenation of n-butenes, in an aromatic hydrocarbon solvent as an absorbent and removing uncondensable and low-boiling gas constituents comprising oxygen, low-boiling hydrocarbons, any carbon oxides, aromatic hydrocarbon solvent and any inert gases as gas stream d2, giving an absorbent stream laden with C4 hydrocarbons and the gas stream d2, and then desorbing the C4 hydrocarbons from the laden absorbent stream, giving a C4 product gas stream d1; and at least partly recycling the gas stream d2 as cycle gas stream a2 into the oxidative dehydrogenation zone, wherein the content of aromatic hydrocarbon solvent in the cycle gas stream a2 is limited to less than 1% by volume.Type: GrantFiled: October 27, 2014Date of Patent: May 8, 2018Assignee: BASF SEInventors: Philipp Grüne, Oliver Hammen, Christine Schmitt, Ragavendra Prasad Balegedde Ramachandran, Jan Pablo Josch, Christian Walsdorff
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Publication number: 20180105479Abstract: The invention relates to a process for producing butadiene from n-butenes which comprises the steps of: A) providing a vaporous n-butenes-comprising input gas stream a1 by evaporating a liquid n-butenes-comprising stream a0; B) introducing the vaporous n-butenes-comprising input gas stream a1 and an at least oxygenous gas into at least one oxidative dehydrogenation zone and oxidatively dehydrogenating n-butenes to butadiene to obtain a product gas stream b comprising butadiene, unconverted n-butenes, steam, oxygen, low-boiling hydrocarbons, high-boiling secondary components, possibly carbon oxides and possibly inert gases, Ca) chilling the product gas stream b by contacting with a cooling medium comprising an organic solvent in at least one chilling zone, the cooling medium being at least partially recycled into the chilling zone, Cb) compressing the chilled product gas stream b which is possibly depleted of high-boiling secondary components in at least one compression stage to obtain at least one aqueous cType: ApplicationFiled: March 23, 2016Publication date: April 19, 2018Inventors: Jan Pablo JOSCH, Ragavendra Prasad BALEGEDDE RAMACHANDRAN, Christian Walsdorff, Regina BENFER, Anton WELLENHOFER, Ulrike WENNING, Heinz BOELT, Hendrik REYNEKE, Christine TOEGEL
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Publication number: 20160355450Abstract: A process for preparing butadiene from n-butenes, comprising the steps of A) providing an input gas stream a1 comprising n-butenes; B) feeding the input gas stream a1 comprising n-butenes, an oxygenous gas and an oxygenous cycle gas stream a2 into at least one oxidative dehydrogenation zone and oxidatively dehydrogenating n-butenes to butadiene, giving a product gas stream b comprising butadiene, unconverted n-butenes, steam, oxygen, low-boiling hydrocarbons and high-boiling secondary components, with or without carbon oxides and with or without inert gases; Ca) cooling the product gas stream b and optionally at least partly removing high-boiling secondary components and steam, giving a product gas stream b?, Cb) compressing and cooling the product gas stream b? in at least one compression and cooling stage, giving at least one aqueous condensate stream c1 and one gas stream c2 comprising butadiene, n-butenes, steam, oxygen and low-boiling hydrocarbons, with or without carbon oxides and with or without ineType: ApplicationFiled: October 27, 2014Publication date: December 8, 2016Inventors: Philipp GRÜNE, Oliver HAMMEN, Christine SCHMITT, Ragavendra Prasad BALEGEDDE RAMACHANDRAN, Jan Pablo JOSCH, Christian WALSDORFF
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Publication number: 20160347686Abstract: The invention relates to a process for preparing butadiene from n-butenes having a start-up phase and an operating phase, wherein the process in the operating phase comprises the steps: A) provision of a feed gas stream a1 comprising n-butenes; B) introduction of the feed gas stream a1 comprising n-butenes, of an oxygen-comprising gas stream a2 and of an oxygen-comprising recycle gas stream d2 into at least one oxidative dehydrogenation zone and oxidative dehydrogenation of n-butenes to butadiene, giving a product gas stream b comprising butadiene, unreacted n-butenes, water vapor, oxygen, low-boiling hydrocarbons, high-boiling secondary components, possibly carbon oxides and possibly inert gases; C) cooling and compression of the product gas stream b and condensation of at least part of the high-boiling secondary components, giving at least one aqueous condensate stream c1 and a gas stream c2 comprising butadiene, n-butenes, water vapor, oxygen, low-boiling hydrocarbons, possibly carbon oxides and possiblyType: ApplicationFiled: January 9, 2015Publication date: December 1, 2016Applicant: BASF SEInventors: Philipp GRÜNE, Gauthier Luc Maurice AVERLANT, Ulrich HAMMON, Ragavendra Prasad BALEGEDDE RAMACHANDRAN, Jan Pablo JOSCH, Christian WALSDORFF
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Publication number: 20160152531Abstract: The invention relates to a process for preparing butadiene from n-butenes, comprising the steps of: A) providing an input gas stream a comprising n-butenes; B) feeding the input gas stream a comprising n-butenes and an oxygenous gas into at least one oxidative dehydrogenation zone and oxidatively dehydrogenating n-butenes to butadiene, giving a product gas stream b comprising butadiene, unconverted n-butenes, water vapor, oxygen, low-boiling hydrocarbons and high-boiling secondary components, with or without carbon oxides and with or without inert gases; Ca) cooling the product gas stream b by contacting it with a coolant and condensing at least a portion of the high-boiling secondary components; Cb) compressing the remaining product gas stream b in at least one compression stage, giving at least one aqueous condensate stream c1 and one gas stream c2 comprising butadiene, n-butenes, water vapor, oxygen and low-boiling hydrocarbons, with or without carbon oxides and with or without inert gases; Da) removingType: ApplicationFiled: July 15, 2014Publication date: June 2, 2016Inventors: Christian WALSDORFF, Philipp GRÜNE, Christine SCHMITT, Ragavendra Prasad BALEGEDDE RAMACHANDRAN, Jan Pablo JOSCH
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Publication number: 20160152532Abstract: A process for oxidative dehydrogenation of n-butenes to 1,3-butadiene in a fixed-bed reactor (R), which comprises at least two production steps (i) and at least one regeneration step (ii), and in which in a production step (i), a starting gas mixture (1) comprising the n-butenes is mixed with an oxygen-comprising gas (2) and brought into contact with a heterogeneous, particulate multimetal oxide catalyst comprising molybdenum and at least one further metal as active composition in the fixed-bed reactor (R) and in a regeneration step (ii), the heterogeneous, particulate multimetal oxide catalyst comprising molybdenum and at least one further metal as active composition is regenerated by passing an oxygen-comprising regeneration gas mixture over it and burning off the carbonaceous material deposited on the multimetal oxide catalyst, where a regeneration step (ii) is carried out between two production steps (i) and where a product gas stream (6) which comprises 1,3-butadiene and additionally unreacted n-buType: ApplicationFiled: July 17, 2014Publication date: June 2, 2016Inventors: Philipp GRÜNE, Gauthier Luc Maurice AVERLANT, Ragavendra Prasad BALEGEDDE RAMACHANDRAN, Jan Pablo JOSCH
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Publication number: 20140200380Abstract: The invention relates to a process for preparing butadiene from n-butenes, which comprises the steps: A) provision of a feed gas stream a comprising n-butenes; B) introduction of the feed gas stream a comprising n-butenes and an oxygen-comprising gas into at least one oxidative dehydrogenation zone and oxidative dehydrogenation of n-butenes to butadiene, giving a product gas stream b comprising butadiene, unreacted n-butenes, water vapor, oxygen, low-boiling hydrocarbons, high-boiling secondary components, possibly carbon oxides and possibly inert gases; Ca) cooling of the product gas stream b by contacting with an organic solvent as coolant, Cb) compression of the product gas stream b in at least one compression stage, giving at least one aqueous condensate stream c1 and a gas stream c2 comprising butadiene, n-butenes, water vapor, oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases; D) separation of incondensable and low-boiling gas constituents comprising oxygen, low-boilingType: ApplicationFiled: January 14, 2014Publication date: July 17, 2014Applicant: BASF SEInventors: Jan Pablo Josch, Philipp Grüne, Christian Walsdorff, Oliver Hammen, Ragavendra Prasad Balegedde Ramachandran
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Publication number: 20140200379Abstract: The invention relates to a process for preparing butadiene from n-butenes, which comprises the following steps: A) provision of a feed gas stream a comprising n-butenes; B) introduction of the feed gas stream a comprising n-butenes and an oxygen-comprising gas into at least one dehydrogenation zone and oxidative dehydrogenation of n-butenes to butadiene, giving a product gas stream b comprising butadiene, unreacted n-butenes, water vapor, oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases; C) cooling and compression of the product gas stream b in at least one compression stage, giving at least one condensate stream c1 comprising water and a gas stream c2 comprising butadiene, n-butenes, water vapor, oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases; D) separation of incondensable and low-boiling gas constituents comprising oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases as gas stream d2 from the gas stream c2 bType: ApplicationFiled: January 8, 2014Publication date: July 17, 2014Applicant: BASF SEInventors: Jan Pablo Josch, Alexander Weck, Sonja Giesa, Steffen Büteborn, Ragavendra Prasad Balegedde Ramachandran, Regina Benfer, Markus Weber