JP2002233768A5 - - Google Patents
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- JP2002233768A5 JP2002233768A5 JP2001029320A JP2001029320A JP2002233768A5 JP 2002233768 A5 JP2002233768 A5 JP 2002233768A5 JP 2001029320 A JP2001029320 A JP 2001029320A JP 2001029320 A JP2001029320 A JP 2001029320A JP 2002233768 A5 JP2002233768 A5 JP 2002233768A5
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- particle size
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- fine particles
- size distribution
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Description
流動層反応器に用いる触媒の粒径分布に関する従来技術は、おおよそ4種類に分類できる。第1の方法は触媒の全粒径範囲を規定するもので、例えば、特公昭50−24941号公報においては、アンチモンを含有するアンモ酸化または酸化触媒の粒子の大きさが1ないし500μmであることが望ましいと記述されている。しかし、この方法は概略の目安を与えるに過ぎず、これだけでは十分な効果が得られない。第2の方法は全粒径範囲を細分して各々の区分における粒子含有率を規定するもので、例えば特公昭60−13746号公報においては350μmを超える大きな粒子を含む触媒の粒径範囲を8つの区分に分けて各々の区分内の粒子量を特定の比率にすることが提案されている。このような方法は厳密であるが、粒径分布を調整するための労力、コストが大きく実用的には極めて大きな問題がある。 The prior art relating to the particle size distribution of the catalyst used in the fluidized bed reactor can be roughly classified into four types. The first method defines the entire particle size range of the catalyst, for example, in JP-B-50-24941, the magnitude of the ammoxidation or particles of the oxidation catalyst containing antimony is at 500 [mu] m from 1 Is stated to be desirable. However, this method provides only a rough guide, and does not provide a sufficient effect. The second method is to subdivide the entire particle size range and define the particle content in each section. For example, Japanese Patent Publication No. 60-13746 discloses that the particle size range of a catalyst containing large particles exceeding 350 μm is reduced to 8 %. It has been proposed to divide into two sections and make the amount of particles in each section a specific ratio. Although such a method is strict, it requires a large amount of labor and cost for adjusting the particle size distribution, and has a very large problem in practical use.
第4の方法は極めて微細な粒子を少量含有させるもので、例えば、特開9−187641号公報には無水マレイン酸等の製造に際して、粒径が10μm以下の微粒子を反応器内の粒子に対し、運転期間中、1日当たりに平均して10ppm以上添加することが開示されている。しかし、10μm以下の微粒子は付着生が強いため大型反応器においては反応器全体に均一に分散させ、かつ一定の割合に維持することは容易ではなく、実際の運転操作に適用するには非常に困難を伴う。以上の如く、粒径分布に関する従来技術は何れも効果が不十分であったり、実際の操作に困難を伴い、多大の労力を要するなど満足のいく技術の確立には至っていない状況にある。
The fourth method is to contain a very small amount of extremely fine particles. For example, Japanese Patent Application Laid-Open No. 9-187641 discloses a method for producing maleic anhydride or the like, in which fine particles having a particle size of 10 μm or less are added to particles in a reactor. On the other hand, it is disclosed that an average of 10 ppm or more is added per day during the operation. However, since fine particles of 10 μm or less have a strong adherence, it is not easy to uniformly disperse them in the entire reactor and maintain a constant ratio in a large reactor. With difficulty. As described above, any of the conventional techniques relating to the particle size distribution are inadequate in effect, or have difficulties in actual operation, and require a great deal of labor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001029320A JP5106720B2 (en) | 2001-02-06 | 2001-02-06 | Ammoxidation catalyst and method for producing nitrile compound using the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001029320A JP5106720B2 (en) | 2001-02-06 | 2001-02-06 | Ammoxidation catalyst and method for producing nitrile compound using the same |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2002233768A JP2002233768A (en) | 2002-08-20 |
JP2002233768A5 true JP2002233768A5 (en) | 2008-03-13 |
JP5106720B2 JP5106720B2 (en) | 2012-12-26 |
Family
ID=18893682
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2001029320A Expired - Fee Related JP5106720B2 (en) | 2001-02-06 | 2001-02-06 | Ammoxidation catalyst and method for producing nitrile compound using the same |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP5106720B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4762554B2 (en) * | 2005-01-06 | 2011-08-31 | ダイヤニトリックス株式会社 | Method for producing acrylonitrile |
EP2226121B1 (en) * | 2007-12-26 | 2015-08-26 | Asahi Kasei Chemicals Corporation | Process for producing oxide catalyst |
JP5378041B2 (en) * | 2009-04-07 | 2013-12-25 | 三菱レイヨン株式会社 | Method for producing composite oxide catalyst for acrylonitrile synthesis |
JP2020200274A (en) * | 2019-06-11 | 2020-12-17 | 旭化成株式会社 | Method for producing acrylonitrile |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52140490A (en) * | 1976-05-19 | 1977-11-24 | Nitto Chem Ind Co Ltd | Production of fluid catalyst containing antimony oxide |
JPS57130546A (en) * | 1981-02-05 | 1982-08-13 | Mitsui Toatsu Chem Inc | Catalyst for fluidized layer |
JP3982852B2 (en) * | 1995-06-30 | 2007-09-26 | 三菱レイヨン株式会社 | Fluidized bed process |
JP3744078B2 (en) * | 1995-11-08 | 2006-02-08 | 三菱化学株式会社 | Operation method of fluidized bed reactor |
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2001
- 2001-02-06 JP JP2001029320A patent/JP5106720B2/en not_active Expired - Fee Related
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