プロパンからアクロレインまたはアクリル酸あるいはそれらの混合物を連続的に製造する工程を安定した方式で実施するための方法

Japanese Patent JP2009514829

A

Stable continuous process for the preparation of acrolein and/or acrylic acid from propane comprises heterogeneously catalyzed dehydrogenation of a propane to obtain a product gas mixture A; optionally introducing the mixture A into a first separation zone to obtain product gas mixture A1; introducing mixture A or A1 into a zone B, where in an oxidation reactor, the propylene is oxidized with molecular oxygen to form e.g. acrolein and/or acrylic acid as end product and product gas mixture B; and determining the molecular oxygen content of the product gas mixture B. Stable continuous process for the preparation of acrolein and/or acrylic acid from propane comprises heterogeneously catalyzed dehydrogenation of a propane in the presence of a molecular oxygen to obtain a product gas mixture A containing propane and propylene, in a first reaction zone A; optionally introducing the product gas mixture A into a first separation zone, to separate a partial quantity or more of the components (which are contained in the mixture and different from propane and propylene) to obtain a remaining product gas mixture A1 containing propane and propylene; introducing product gas mixture A or A1 into a second reaction zone B for feeding at least an oxidation reactor, where in at least an oxidation reactor the propylene contained in the gas mixture A or A1 is subjected to a selectively heterogeneously catalyzed partial gas-phase oxidation with molecular oxygen to form acrolein and/or acrylic acid as end product, non-converted propane, excess molecular oxygen and optionally gas mixture B containing non-converted propylene; separating the end product and subsequently recycling the residue gas containing propane, molecular oxygen, non-converted propylene, at least partially non-converted propane, molecular oxygen and optionally non-converted propylene as molecular oxygen containing cycle gas 1 by cycle gas method, into the reaction zone A; continuously supplying fresh propane into at least one of the zones such as reaction zone A, separation zone A, reaction zone B and separating zone B, where the supply of the fresh propane takes place at a rate, which exhibits a stationary value in the stable operating condition of the process; and determining the molecular oxygen content of the product gas mixture B and comparing with the given stationary target content of the molecular oxygen in the product gas mixture B for stable operating condition of the process; where, if the content of the molecular oxygen at any point of time in the product gas mixture B is larger than the stationary target content, the supply rate of the fresh propane supplied at this time is larger than its stationary value and if the content of the molecular oxygen at any point of time in the product gas mixture B is smaller than the stationary target content, the supply rate of the fresh propane supplied at this time is smaller than its stationary value.

WO/1992/004116	THE METHOD FOR FABRICATION OF CATALYSTS WITH ACID-BASE AND REDOX PROPERTIES, CONSISTING OF HETEROPOLYANIONS MOLECULARLY DISPERSED IN POLYMER MATRICES
JPS5820943	[Title of the Invention] A process of unsaturated aldehyde

Martin Dieterle
Getz-Peter Schindler
Catalina Crunner

JP2008538337A

April 09, 2009

October 26, 2006

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BASF SE

C07C45/35; C07C47/22; C07C51/25; C07C57/055; C07B61/00

JP2002523387A	2002-07-30
JP2002523389A	2002-07-30
JP2004503516A	2004-02-05
JPS58189130A	1983-11-04
JP2004525172A	2004-08-19
JPS59163340A	1984-09-14
JP2005526761A	2005-09-08
JP2009511539A	2009-03-19
JP2006522063A	2006-09-28
JP2006500429A	2006-01-05

Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Hiroshi Sugimoto
Kimihiro Hoshi
Hiroyasu Ninomiya
Einzel Felix-Reinhard

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