Coal liquefied oil boiling bed hydrogenation technique

A technology of coal liquefied oil and fluidized bed, which is applied in the direction of refining to remove heteroatoms, etc., can solve the problems of short service life of catalyst, increase of investment cost, catalyst deactivation, etc., to improve mechanical strength and wear resistance, and prolong service life , the effect of reducing production costs

Active Publication Date: 2007-12-12
神华煤制油研究中心有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, the hydroprocessing of coal liquefied oil by the fixed bed process has the following problems: because the coal liquefied oil is heavy and contains many mechanical impurities, the catalytic reaction conditions will be relatively harsh; high-nitrogen raw materials will accelerate catalyst deactivation, and the service life of the catalyst is very long. short, the product properties cannot be guaranteed; the pressure drop of the catalyst bed is high; in order to meet the product index, the fixed bed reactor system needs to adopt a more complicated design, which will increase the investment cost
Due to the large pore structure of the catalyst and no method for increasing the strength of the catalyst, the strength and wear resistance of the catalyst still need to be further improved.

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0023] The preparation method of the special hydrogenation catalyst for coal liquefied oil of the present invention comprises the following process:

[0024] (1). Alumina modified with phosphorus and boron additives, selectively adding nano-silica powder, fibrous additives, adhesive and peptizer solution, etc. are mixed evenly, kneaded into a paste, and extruded into strips;

[0025] (2). Dry the above molded product at 100-150°C for 0.5-24 hours, and roast at 350-700°C for 1-12 hours to obtain a catalyst carrier;

[0026] (3). Prepare impregnating solutions containing VIB group metals and VIII group metals respectively;

[0027] (4). The catalyst carrier obtained in step (2) is immersed in the solution prepared in step (3), dried at 100-150°C for 0.5-24 hours, and calcined at 350-700°C for 1-12 hours to obtain the finished catalyst .

[0028] The phosphorus and boron modified alumina used in the special hydrogenation catalyst for coal liquefied oil of the present invention ...

Embodiment 1

[0043] Preparation of modified alumina G-1

[0044] Take the filter cake after washing the alumina precursor prepared by the carbonization method, measure its dry basis as 30wt%, take 1500 grams of the filter cake, add 2.5 liters of deionized water, make a slurry, heat up to 65 ° C, stir for 1 hour, add 90 Gram 85wt% phosphoric acid solution, filter to obtain filter cake, add 2.0 liters of deionized water, beating, be warming up to 70 ℃, and add 86 grams of boric acid, and use concentration to be 10g NH 3 Adjust the pH value of the solution to 6 per 100ml of ammonia solution, stir for 1 hour, filter and dry at 110°C for 4 hours, the sample is G-1, and its physical and chemical properties are shown in Table 1.

Embodiment 2

[0046] Preparation of modified alumina G-2.

[0047] Get 800 grams of filter cake (30wt% on a dry basis) after washing the aluminum oxide precursor prepared by the aluminum sulfate method, add 3 liters of deionized water, stir and heat up to 85 ° C, and add 53 grams of 85wt% phosphoric acid solution, filter to obtain Filter cake, add 2.5 liters of deionized water, make a slurry, heat up to 70 ° C, and add 120 grams of boric acid, and use a concentration of 10 g NH 3 Adjust the pH of the solution to 6.5 per 100ml of ammonia solution, stir for 1 hour, continue stirring for 30 minutes, and dry at 110°C for 4 hours. The physical and chemical properties of sample G-2 are shown in Table 1.

[0048] Table 1 Physicochemical properties of samples

[0049] Example number

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Abstract

The invention discloses a process of hydrogenation for coal liquification oil on boiling bed. The process employs hydrogenation catalyst which contains fiber adjuvant, the fiber adjuvant content in catalyst is 3- 10 wt%. The mechanical strength and wearing resistance are strong, so it can remove nitrogen and sulfur from coal liquification oil maximumly, reduces olefin and aromatic hydrocarbons content, increases product stability and provides high performance coal liquification solvent oil.

Description

technical field [0001] The invention relates to a fluidized bed hydrogenation process, in particular to a coal liquefied oil fluidized bed hydrogenation process. Background technique [0002] The process usually used for catalytic hydrogenation of coal liquefied oil is mainly fixed bed hydrogenation process. Fixed bed reactors are especially suitable for handling lighter and cleaner feeds, such as naphtha, middle distillates, gas oils and ordinary residues. The fixed bed reactor is characterized by smoother operation and easier control. However, the hydroprocessing of coal liquefied oil by the fixed bed process has the following problems: because the coal liquefied oil is heavy and contains many mechanical impurities, the catalytic reaction conditions will be relatively harsh; high-nitrogen raw materials will accelerate catalyst deactivation, and the service life of the catalyst is very long. Short, the product properties cannot be guaranteed; the pressure drop of the cata...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/02
Inventor 朱豫飞
Owner 神华煤制油研究中心有限公司
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