Fogger, reactor using same and method for preparation of oxime
A sprayer and reactor technology, applied in chemical instruments and methods, chemical/physical/physical-chemical nozzle reactors, oxime preparation, etc., can solve problems such as not following the target, and achieve the effect of inhibiting direct contact and inhibiting decomposition
Active Publication Date: 2011-09-14
SUMITOMO CHEM CO LTD
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- Abstract
- Description
- Claims
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AI Technical Summary
Problems solved by technology
When this reaction is carried out, there is a case in which when hydrogen peroxide is supplied into the reactor from a nebulizer, catalyst particles enter the nebulizer before supplying hydrogen peroxide, when the flow rate fluctuates, etc., so that the hydrogen peroxide is accelerated. Decomposition, reactions do not proceed as intended
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0058] Put the catalyst in the transparent vinyl chloride pipe, let water flow in, and find the minimum flow rate required for the catalyst to discharge.
[0059] As a catalyst, use a maximum particle size of 150 μm or less, an average particle size of 38 μm, and a density of 2.2 g / cm 3 titanium silicate catalyst.
[0060] Place the catalyst at a position 400mm away from the other end of the pipe (length 600mm) closed at one end, and supply water from the other end through a flow meter so that the water flows from the position 500mm away from the other end (about 100mm away from the catalyst). The hole of 2mmΦ in the lower part flows out.
[0061] Change the pipe diameter and flow rate of water. The results are shown in Table 1.
[0062] By setting the flow velocity to 0.12 m / sec or more, the catalyst can be easily discharged.
[0063] Table 1
[0064]
[0065] ○: The catalyst can be easily discharged.
[0066] x: Catalyst discharge was insufficient.
[0067] Example...
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Abstract
The present invention provides a sprayer making it difficult for katalyst granules to enter therein and it easy for katalyst granule to discharge even if the katalyst granule enters therein when the sprayer is used in a reaction wherein the katalyst katalyst granule is used for mixing and suspending, a reactor using the sprayer, and a method for preparation of oximes. The sprayer in accordance with the present invention is characterized in that the pipe diameter decreases basically continuously or gradually along the frontend part direction; the sprayer is preferably used in a reactor for mixing and suspending katalyst granules, wherein at least one part of the reaction raw materials fed by the sprayer reacts; the sprayer is especially preferably used for fabricating oximes by the reaction of ketones, ammines and hydrogen peroxides.
Description
technical field [0001] The present invention relates to a nebulizer, a reactor using the nebulizer, and a method for producing an oxime. Specifically, the present invention relates to a nebulizer suitable for use in a reaction in which catalyst particles are suspended, a reactor using the nebulizer, and a method for producing an oxime. Background technique [0002] Catalyst particles are sometimes suspended in a tank reactor or the like, and the reaction raw materials are supplied from a sprayer or the like to perform the reaction. At this time, catalyst particles may enter the nebulizer from the supply hole of the nebulizer. Depending on the condition of the reaction raw material, it may decompose and deteriorate due to direct contact with the catalyst, and the reaction may not proceed as intended. [0003] For example, there are known methods for producing oximes from ketones using hydrogen peroxide and ammonia in the presence of a titanium silicate catalyst (for example...
Claims
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IPC IPC(8): B01J8/08B01J19/26C07C249/08C07C251/44
Inventor 张毅小林由典川濑伸一
Owner SUMITOMO CHEM CO LTD