A kind of impregnating device and the method for preparing catalyst

A technology of impregnation device and catalyst, which is applied in chemical instruments and methods, catalyst activation/preparation, catalysts in physical/chemical processes, etc., can solve the problems of affecting the strength of the catalyst, the large amount of carrier materials in the drum, and the difficulty in quickly dissipating the heat of adsorption.

Active Publication Date: 2017-07-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The device still adopts the conventional catalyst carrier feeding and spraying method, and the catalyst carrier is rolled and moved by rotation, so there is still a lot of carrier material in the drum, and a large amount of adsorption heat is difficult to dissipate quickly, so that the impregnation temperature increases, resulting in Disadvantages of poor mechanical strength of the catalyst
[0007] At present, the drum impregnation technology adopts the method of spraying the active metal components onto the catalyst carrier at one time. In this way, due to the small porosity of the microspherical catalyst carrier, a large amount of adsorption heat cannot be dissipated in time, resulting in a relatively high impregnation temperature. High, affecting the strength of the catalyst, especially the anti-wear performance of the catalyst

Method used

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  • A kind of impregnating device and the method for preparing catalyst
  • A kind of impregnating device and the method for preparing catalyst
  • A kind of impregnating device and the method for preparing catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] use figure 1 Impregnation apparatus shown.

[0033] The properties of the alumina carrier used are as follows: the specific surface area is 275m 2 / g, pore volume 0.75mL / g, wear index 0.51%, particle size distribution: 0.3~0.4mm accounts for 3%, 0.4~0.5mm accounts for 90%, 0.5~0.6mm accounts for 7%.

[0034] The prepared Mo-Ni-P impregnation solution is as follows:

[0035] 85.8 g of phosphoric acid H 3 PO 4 (85wt%) was dissolved in 1880 mL of water, then 232.9 g of molybdenum trioxide and 98.3 g of basic nickel carbonate were added, the temperature was raised to 100 °C, stirred and refluxed for 0.5 h, and filtered to obtain Mo-Ni-P aqueous solution.

[0036] Add 1000mL of impregnation solution to the impregnation solution feeding device, make 1 / 3 of the impregnation solution enter the rotating drum through the atomizing pipe, and the rest of the impregnating solution enter the rotating drum through the spray pipe, and 1000g of the catalyst carrier is transported by...

Embodiment 2

[0038] The prepared W-Mo-Ni-P impregnation solution is as follows:

[0039] 85.9 g of phosphoric acid H 3 PO 4 (85wt%) was dissolved in 1880 mL of water, then 116.7 g of molybdenum trioxide and 98.4 g of basic nickel carbonate were added, the temperature was raised to 100 °C and stirred and refluxed for 0.5 h to obtain a clear Mo-Ni-P solution, and then 161.4 g of partial solution was added. Ammonium tungstate, stirring to make ammonium metatungstate completely dissolved, and then filtering to obtain W-Mo-Ni-P aqueous solution.

[0040] Add 1000mL of impregnation solution to the impregnation solution feeding device, make 1 / 3 of the impregnation solution enter the rotating drum through the atomizing pipe, and the rest of the impregnating solution enter the rotating drum through the spray pipe, and take 1000g of the alumina carrier in Example 1 to pass through the catalyst. The carrier feeding device adopts gas conveying and feeding, and the gas flow rate is 2.0m / s. After the ...

Embodiment 3

[0046] This example gives the physicochemical properties of the catalysts prepared in the above examples, see Table 1.

[0047] It can be seen from Table 1 that the catalyst prepared by the method of the present invention has a very low crushing rate and a very concentrated particle size distribution, and the catalyst of 0.4-0.5 mm accounts for more than 88%; at the same time, the catalyst prepared by this method has less wear and tear Index, good anti-wear performance, very suitable for use in fluidized bed devices.

[0048] Table 1 Physicochemical properties of different catalysts

[0049]

[0050] The method for measuring the wear index in the present invention is the method for measuring the wear index of the fluidized microsphere catalyst and the carrier (air jet wear tester method). The larger the wear index value, the worse the anti-wear performance of the catalyst.

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Abstract

The invention discloses an impregnating device and a method for preparing a catalyst. The device includes a horizontal drum, a catalyst carrier feeding device, and an impregnating solution feeding device. The impregnating solution feeding device is provided with a spray pipe extending into the drum, and the spray pipe is provided with a plurality of spray pipes. The catalyst carrier feeding device uses gas to feed the material, and the impregnating solution feeding device is also provided with an atomizing tube extending into the drum, and the atomizing tube is provided with an atomizing nozzle, so that the atomized impregnating solution and After the catalyst carrier transported by the gas contacts each other, it falls on the drum wall. Using the impregnation device to prepare the catalyst can dissipate the adsorption heat of impregnation in a timely manner, reduce the breakage rate of the catalyst, improve the anti-wear performance of the catalyst, and further increase the single batch processing capacity of the device, which can meet the needs of large-scale industrial production. The device is particularly suitable for preparing ebullating bed hydrogenation catalysts.

Description

technical field [0001] The invention relates to an impregnation device and a method for preparing a catalyst by using the impregnation device, in particular to an impregnation device for preparing a microspherical catalyst and a method thereof. Background technique [0002] Impregnation is the most common method for producing solid catalysts. When a carrier with a porous structure is immersed in a solution containing a certain amount of active metal groups, the solution is sucked into the pores of the carrier from the surface under the action of capillary force, and the active components of the solute penetrate and diffuse to the inner wall of the pores, and then are absorbed by the pores. The active point adsorption on the surface of the carrier, or deposition, ion exchange or even reaction occurs, so that the active metal components are supported on the catalyst carrier. The impregnation method has large processing capacity and high efficiency, and the loaded active compo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J37/02B01J23/883B01J23/888
Inventor 刘杰王永林朱慧红孙素华金浩杨光
Owner CHINA PETROLEUM & CHEM CORP
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