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Suspended bed hydrocracking catalyst for coal tar and preparation method thereof

A hydrocracking and catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc. The effect of improving the economic benefit of the device, simple preparation process and low coke formation rate

Active Publication Date: 2020-07-17
YANAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalysts mentioned above are used in the hydrocracking process of coal tar or heavy oil suspension bed. Although the conversion rate of heavy oil is high, the main problem is that the cost of the catalyst itself is high, and it cannot be practically applied in production practice.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A kind of preparation method of coal tar suspended bed hydrocracking catalyst of the present invention, specifically implement according to the following steps:

[0048] Step 1. Grinding the semi-coke into a powder with a particle size of 10-100 μm; adding the semi-coke powder into distilled water and mixing evenly to obtain a suspension of semi-coke powder with a mass fraction of 20%;

[0049] Step 2, ferrous sulfate is added into distilled water, mix uniformly, obtain the ferrous sulfate solution that mass fraction is 20%;

[0050] Step 3, adding the ferrous sulfate solution into the blue charcoal powder suspension, and adjusting the pH to 6.0 with ammonia water, and then stirring at 50°C for 1 hour to obtain suspension a;

[0051] The stirring rate is 6000r / min;

[0052] The volume ratio of ferrous sulfate solution to blue charcoal powder suspension is 1:2;

[0053] Step 4, passing air into the suspension a obtained after step 3 to carry out oxidation reaction, whi...

Embodiment 2

[0061] A kind of preparation method of coal tar suspended bed hydrocracking catalyst of the present invention, specifically implement according to the following steps:

[0062] Step 1. Grinding the semi-coke into a powder with a particle size of 10-100 μm; adding the semi-coke powder into distilled water and mixing evenly to obtain a suspension of semi-coke powder with a mass fraction of 20%;

[0063] Step 2, ferrous sulfate is added into distilled water, mix uniformly, obtain the ferrous sulfate solution that mass fraction is 20%;

[0064] Step 3, adding the ferrous sulfate solution into the semi-coke powder suspension, and adjusting the pH to 6.0 with ammonia water, and then stirring at 60°C for 2 hours to obtain a suspension a;

[0065] The stirring rate is 6000r / min;

[0066] The volume ratio of ferrous sulfate solution to blue charcoal powder suspension is 1:3;

[0067] Step 4, passing air into the suspension a obtained after step 3 to carry out oxidation reaction, whil...

Embodiment 3

[0075] A kind of preparation method of coal tar suspended bed hydrocracking catalyst of the present invention, specifically implement according to the following steps:

[0076] Step 1. Grinding the semi-coke into a powder with a particle size of 10-100 μm; adding the semi-coke powder into distilled water and mixing evenly to obtain a suspension of semi-coke powder with a mass fraction of 20%;

[0077] Step 2, ferrous sulfate is added into distilled water, mix uniformly, obtain the ferrous sulfate solution that mass fraction is 20%;

[0078] Step 3, adding the ferrous sulfate solution into the blue charcoal powder suspension, and adjusting the pH to 6.0 with ammonia water, and then stirring at 80°C for 3 hours to obtain suspension a;

[0079] The stirring rate is 8000r / min;

[0080] The volume ratio of ferrous sulfate solution and blue charcoal powder suspension is 1: 3.5;

[0081] Step 4, passing air into the suspension a obtained after step 3 to carry out oxidation reaction...

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Abstract

The invention discloses a suspended bed hydrocracking catalyst for coal tar and a preparation method thereof. The preparation method comprises the following specific steps: adding a ferrous sulfate solution into semi-coke powder suspension, conducting stirring, adjusting a pH value through ammonia water, and then introducing air for an oxidation reaction so as to obtain a semi-coke powder suspension b loaded with an iron compound; then adding regenerated powder of a waste cobalt-molybdenum-nickel series hydrocracking catalyst into the suspension b, successively carrying out stirring, filteringand drying to obtain solid powder containing semi-coke, the iron compound and the regenerated powder of the waste cobalt-molybdenum-nickel series hydrocracking catalyst; and finally, uniformly mixingthe solid powder with red mud powder to obtain the suspended bed hydrocracking catalyst for coal tar. The catalyst prepared by using the method provided by the invention can effectively improve the conversion rate of heavy oil in coal tar and increase the yield of light oil, and is low in coking rate and relatively low in catalyst cost, so the economic benefit of a device can be obviously improved.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a coal tar suspended bed hydrocracking catalyst, and also relates to a preparation method of the catalyst. Background technique [0002] At present, the combined process of fixed bed hydrorefining and fixed bed hydrocracking or the combined process of delayed coking and fixed bed hydrocracking are mostly used for coal tar processing. In the fixed bed hydrocracking process, there are many mechanical impurities in the raw material and the molecular weight of the oil product is large, which may easily cause the pressure drop of the reactor to increase. In addition, there are problems such as fast coking and deactivation of the catalyst, short service life, high investment cost, and short operation period of the device. In contrast, the suspended bed hydrogenation process passes highly dispersed fine particle catalysts or additives together with raw oil and h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/883B01J23/745C10G47/12C10G47/26
CPCB01J23/883B01J23/745C10G47/12C10G47/26Y02P20/584
Inventor 郭莉牛鸿权付峰王丹军史义存
Owner YANAN UNIV
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