[특허]Preparation of acrylic acid by heterogeneously catalyzed partial gas phase oxidation of propylene

Preparation of acrylic acid by heterogeneously catalyzed partial gas phase oxidation of propylene 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C07C-051/42
출원번호	US-0131256 (2005-05-18)
등록번호	US-8431743 (2013-04-30)
우선권정보	DE-10 2004 032 129 (2004-07-01); DE-10 2005 009 885 (2005-03-01); DE-10 2005 009 891 (2005-03-01); DE-10 2005 010 111 (2005-03-02); DE-10 2005 013 039 (2005-03-18)
발명자 / 주소	Dieterle, Martin Mueller-Engel, Klaus Joachim Hechler, Claus Hammon, Ulrich Diefenbacher, Armin
출원인 / 주소	BASF Aktiengesellschaft
대리인 / 주소	Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
인용정보	피인용 횟수 : 0 인용 특허 : 34

초록 ▼

The present invention relates to a process for preparing acrylic acid by two-stage heterogeneously catalyzed partial gas phase oxidation of propylene, in which the propylene source used is a preceding propane dehydrogenation and in which the first oxidation stage is operated with restricted propylene conversion, and unconverted propane and propylene present in the product gas mixture of the second partial oxidation stage are recycled substantially into the preceding propane dehydrogenation.

대표청구항 ▼

1. A process for preparing acrylic acid by heterogeneously catalyzed partial gas phase oxidation of propylene, comprising: a) in a first reaction stage, subjecting propane to a heterogeneously catalyzed dehydrogenation in the presence of and/or with exclusion of oxygen to obtain a product gas mixture 1 comprising propane and propylene, andb) optionally, removing and/or converting to other compounds a portion of the constituents, other than propane and propylene, present in the product gas mixture 1formed in the first reaction stage to obtain a product gas mixture 1′ from product gas mixture 1, andc) in a second reaction stage, subjecting product gas mixture 1 and/or product gas mixture 1′, as a constituent of a starting reaction gas mixture (2-a) which comprises molecular oxygen, molecular nitrogen, and propylene, wherein the molar ratio of O2:C3H6 is ≧1 and the molar ratio of N2 : O2 ranges from 3 to 6, to a heterogeneously catalyzed partial gas phase oxidation of propylene present in product gas mixture 1 and/or product gas mixture 1′ to acrolein in a second reaction stage charged with a fixed catalyst bed (2-b) whose catalysts have at least one multimetal oxide comprising the elements Mo, Fe and Bi as an active composition to obtain a product gas mixture (2-c), andd) optionally, lowering the temperature of the product gas mixture (2-c) leaving the second reaction stage by indirect and/or direct cooling and optionally, adding molecular oxygen and/or inert gas to product gas mixture (2-c), and thene) in a third reaction stage, subjecting product gas mixture (2-c), as a starting reaction gas mixture (3-a) which comprises acrolein, molecular oxygen and at least one inert gas and comprises molecular oxygen and acrolein in a molar O2:C3H4O ratio of ≧0.5, to a heterogeneously catalyzed partial gas phase oxidation of acrolein present in starting reaction gas mixture (3-a) to acrylic acid in a third reaction stage charged with a fixed catalyst bed (3-b) whose catalysts have at least one multimetal oxide comprising the elements Mo and V as an active composition to obtain a product gas mixture (3-c), andf) removing acrylic acid in a separating zone A from product gas mixture (3-c) and recycling at least the unconverted propane and propylene present in product gas mixture (3-c) to an extent of in each case at least 90 mol % based on the particular amount present in product gas mixture (3-c) into at least the first of the three reaction stages, wherein the conversion CP of propylene in the second reaction stage, based on a single pass through it, ranges from 90 to 98 mol %, andthe process has at least one separate discharge for constituents other than propane and propene and the content of propane and propene in that discharge is 90 to 98 mol % and Ca ranges from >99 to 99.9 mol %. 32. The process according to claim 4, wherein CP ranges from >90 to 98 mol % and Ca ranges from >99 to 99.9 mol %.

이 특허에 인용된 특허 (34)

Etzkorn William G. (Cross Lanes WV) Harkreader Gordon G. (Charleston WV), Anhydrous diluents for the propylene oxidation reaction to acrolein and acrolein oxidation to acrylic acid.
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Kroker Ruprecht,DEX ; Wiedemann Manfred,DEX, Continuous distillative separation of liquid mixtures which contain (meth) acrylic acid as the main component.
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Otto Machhammer DE; Peter Zehner DE; Filip Deberdt BE, Continuous recovery of (meth)acrylic acid.
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Otto Machhammer DE; Susanne Haupt DE; Volker Schliephake DE; Jurgen Schroder DE, Continuous recovery of (meth)acrylic acid.
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Boroczky, Lilla; Ngai, Agnes Y.; Westermann, Edward F., Control strategy for dynamically encoding multiple streams of video data in parallel for multiplexing onto a constant bit rate channel.
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Khoobiar Sargis (Kinnelon NJ), Conversion of alkanes to unsaturated aldehydes.
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Khoobiar Sargis (Kinnelon NJ), Conversion of isobutane to methacrolein.
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Khoobiar Sargis (Kinnelon NJ), Conversion of isobutane to methacrolein.
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Khoobiar Sargis (Kinnelon NJ), Conversion of isobutane to methacrolein.
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Thiel, Joachim; Schroder, Jurgen; Nestler, Gerhard, Fractional condensation of a product gas mixture containing acrylic acid.
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Dieterle, Martin; Petzoldt, Jochen; M?ller-Engel, Klaus Joachim; Arnold, Heiko, Heterogeneously catalyzed partial gas phase oxidation of propene to acrylic acid.
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Otto Machhammer DE; Andreas Tenten DE; Harald Jachow DE; Susanne Haupt DE; Heiko Arnold DE; Signe Unverricht DE, Method for producing acrolein and/or acrylic acid from propane.
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Otto Machhammer DE; Andreas Tenten DE; Harald Jachow DE; Susanne Haupt DE; Heiko Arnold DE; Signe Unverricht DE, Method for producing acrolein and/or acrylic acid from propane.
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Jurgen Schroder DE; Gerhard Nestler DE; Klaus Joachim Muller-Engel DE, Method for producing acrylic acid.
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Nestler, Gerhard; Schröder, Jürgen; Machhammer, Otto, Method for producing acrylic acid and acrylic acid esters.
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Nestler, Gerhard; Schroder, Jurgen; Bolz, Gerhard, Method for producing acrylic acid and acrylic acids esters.
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Bernd Eck DE; Otto Machhammer DE; Theo Proll DE; Volker Schliephake DE; Joachim Thiel DE; Klaus Brollos DE, Method for producing acrylic acid and methacrylic acid.
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Eck, Bernd; Machhammer, Otto; Proll, Theo; Schliephake, Volker; Muller-Engel, Klaus Joachim, Method for purifying acrylic acid and methacrylic acid.
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Volker Schliephake DE; Ulrich Hammon DE; Wolfgang Pies DE; Ulrich Rauh DE, Method for removing by-products obtained when producing acrylic acid or methacrylic acids.
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Signe Unverricht DE; Heiko Arnold DE; Andreas Tenten DE; Ulrich Hammon DE, Method for the catalytic gas phase oxidation of acrolein into acrylic acid.
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Heiko Arnold DE; Signe Unverricht DE; Ulrich Hammon DE; Hans-Peter Neumann DE; Klaus Harth DE; Andreas Tenten DE, Method for the catalytic gas phase oxidation of propene into acrolein.
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Unverricht, Signe; Arnold, Heiko; Tenten, Andreas; Hammon, Ulrich; Neumann, Hans-Peter; Harth, Klaus, Method for the catalytic gas-phase oxidation of propene to acrylic acid.
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Eck, Bernd; Machhammer, Otto; Proll, Theo; Schliephake, Volker; Thiel, Joachim; Brollos, Klaus, Method for the fractional condensation of a hot gas mixture containing acrylic acid or methacrylic acid and having a high proportion of non-condensable constituents.
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Machhammer, Otto; Schindler, Goetz-Peter; Tenten, Andreas; Harth, Klaus; Zehner, Peter; Müller-Engel, Klaus Joachim; Rosowski, Frank; Borgmeier, Frieder, Method for the production of acrolein or acrylic acid or the mixture thereof from propane.
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Hefner Werner,DEX ; Machhammer Otto,DEX ; Neumann Hans-Peter,DEX ; Tenten Andreas,DEX ; Ruppel Wilhelm,DEX ; Vogel Herbert,DEX, Preparation of acrolein, acrylic acid or a mixture thereof from propane.
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Thiel, Joachim; Hammon, Ulrich; Baumann, Dieter; Heilek, J?rg; Schr?der, J?rgen; M?ller-Engel, Klaus Joachim, Preparation of acrylic acid.
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Sato Takahisa (Himeji JPX) Baba Masao (Himeji JPX) Okane Michito (Himeji JPX), Process for preparing and recovering acrylic acid.
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Herbst Holger (Frankenthal DEX) Nestler Gerhard (Ludwigshafen DEX) Hammon Ulrich (Mannheim DEX), Process for the fractional separation of (meth)acrylic acid from a mixture containing (meth)acrylic acid.
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Jonathan L Brockwell ; Mark A Young ; William G Etzkorn ; Barbara K Warren ; John M Maher, Process for the oxidation of alkanes.
상세보기
Bub,Gunther; Mosler,Jurgen; Maschmeyer,Dietrich; Sabbagh,Andreas; Fornika,Roland; Peuckert,Matthias, Process for the production of acrylic acid.
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Machhammer Otto,DEX ; Dams Albrecht,DEX ; Eck Bernd,DEX ; Proll Theo,DEX, Purification of acrylic acid and methacrylic acid.
상세보기
Dockner Toni,DEX ; Nestler Gerhard,DEX ; Herbst Holger,DEX ; Lermer Helmut,DEX ; Martan Hans,DEX ; Vogel Herbert,DEX ; Exner Herbert,DEX, Purification of crude (meth) acrylic acid.
상세보기
Egly Horst,DEX ; Diehl Volker,DEX ; Jorg Klaus,DEX, Separation of (meth)acrylic acid from the reaction gas mixture formed in the catalytic gas phase oxidation of C.sub.3 /C.
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Willersinn Carl-Heinz (Ludwigshafen DEX), Separation of acrylic acid from the reaction gases from the catalytic oxidation of propylene and/or acrolein.
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Preparation of acrylic acid by heterogeneously catalyzed partial gas phase oxidation of propylene 원문보기

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