Method for preparing fluid bed catalyst in use for ammoxidation reaction of olefin

A fluidized bed catalyst and oxidation reaction technology, which is applied in the preparation of hydrocarbon ammoxidation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problem of catalyst activity reduction in the later stage and reactor production capacity Reduce and reduce active sites and other problems, and achieve the effects of improved wear resistance, long service life and excellent catalytic performance

Inactive Publication Date: 2005-03-30
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, for supported catalysts, although the carrier itself has no catalytic activity, the physical properties of the carrier have a great influence on the catalytic performance of the catalyst. Especially for supported fluidized bed catalysts, the wear resistance of the carrier directly affects the catalytic performance of the catalyst. service life
[0003] In the prior art, it has been proposed that adding sodium to the catalyst can improve the wear resistance of the catalyst, but it is generally believed that the introduction of sodium will cause the catalyst to be poisoned in the later stage

Method used

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  • Method for preparing fluid bed catalyst in use for ammoxidation reaction of olefin
  • Method for preparing fluid bed catalyst in use for ammoxidation reaction of olefin
  • Method for preparing fluid bed catalyst in use for ammoxidation reaction of olefin

Examples

Experimental program
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Example Embodiment

[0037] [Example 1]

[0038] Combine 425.4 g (NH 4 ) 6 Mo 7 O 24 ·4H 2 O was added to 325 g of warm water at 70°C, stirred to dissolve it, and then 11.6 g of solid silica with a particle size of 5-20 nanometers was added. After the slurry was uniform, 1401 g of 40wt% Silica sol, made of material A.

[0039] Add 178.3 grams of Fe(NO 3 ) 3 ·9H 2 O was added to 170 grams of 70℃ hot water, stirred to dissolve and then added 129.0 grams of Bi(NO 3 ) 3 ·5H 2 O, 62.4 g Ce(NO 3 ) 3 ·NH 2 O, 105.7 g Mg(NO 3 ) 3 ·6H 2 O, 312.8 grams of Ni(NO 3 ) 3 ·6H 2 O and 18.1 grams of Co(NO 3 ) 3 ·6H 2 After O is stirred and dissolved, material B is made.

[0040] Add 1.5 g of KNO to 20 g of water 3 , 1.7 grams of LiNO 3 And 2.4 grams of CsNO 3 After dissolving, add it to material B to form material C.

[0041] Material C was added dropwise to material A under rapid stirring. The obtained material was aged at 70°C for 3 hours, and then spray-dried into particles. The obtained particles were calcined in ...

Example

[0042] [Examples 2~10]

[0043] Change the starting material and the amount of the active component, change the content of the carrier silica in the total catalyst and the amount of solid silica in the carrier, and the rest are the same as in Example 1. The catalyst product is evaluated using the above-mentioned investigation and evaluation conditions.

Example Embodiment

[0049] Example 2 Mo 11.2 Bi 0.45 Fe 2 Ni 5.2 Mg 2 La 0.3 Rb 0.06 K 0.09 W 0.46 V 0.3 P 0.04 O x

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Abstract

A fluidized-bed catalyt for the ammoxidation reaction of olefin is composed of the carrie consisting of nano-SiO2 and silica sol, and the active component Mo(12-g)BiaFe6NicXdYeZfOgOx, where X is chosen from Mg, Co and Ca; Y is chosen from La, Ce and Sm; Z is chosen from Li, K and Rb, and Q is chosen from B, W and P.

Description

technical field [0001] The invention relates to a preparation method of a fluidized bed catalyst for olefin ammoxidation reaction. The active component of the catalyst contains multiple metal oxides such as molybdenum, bismuth and iron, and uses silicon dioxide as a carrier. Background technique [0002] α or β unsaturated nitriles can be prepared from olefins through ammoxidation, and the most typical industrial acrylonitrile or methacrylonitrile is prepared from propylene or isobutylene through ammoxidation. This type of ammoxidation reaction is usually carried out in a fluidized bed reactor, and the catalysts used are mostly supported catalysts, the most mature and widely used of which are molybdenum-bismuth-iron catalysts, which use silica as a carrier and support The active component contains molybdenum, bismuth, iron and other metal oxides, as introduced in Chinese patents ZL91100078.X and ZL97106771.6. Since the birth of this type of catalyst, people have paid more a...

Claims

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Application Information

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IPC IPC(8): B01J23/88B01J23/889B01J27/18C07C253/24
Inventor 黄新汉姜家乐严胜宏杨斌
Owner CHINA PETROLEUM & CHEM CORP
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