Method for preparing diesel from coal tar

A technology for coal tar and diesel oil, which is applied in the processing of tar by distillation method and tar refining by chemical method, etc., can solve the problems of hydrogenation catalyst activity, unfavorable hydrothermal stability and strength, catalyst deactivation, catalyst coke deposition, etc. , to achieve the effect that the production technology is easy to master, the process is simple, and the equipment investment is small.

Active Publication Date: 2009-03-04
HANERGY TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] Compared with petroleum secondary processing distillate oil hydrogenation, the key problem that coal tar hydrogenation upgrading catalyst needs to solve is: the one, the oxygen content in coal tar is high, the water produced in the reaction process will have negative impact on the activity of hydrogenation catalyst, water Both thermal stability and strength have adverse effects; the second is that the high content of colloid and residual carbon in coal tar is easy to promote carbon deposition in the catalyst, which is easy to cause rapid deactivation of the catalyst; the third is that the sulfur and nitrogen content in coal tar are high, and must be Deep desulfurization and denitrification, otherwise it will affect the stability of diesel oil; Fourth, coal tar contains a large amount of aromatics, which must be deeply hydrogenated and dearomatized, and the aromatics must be saturated to the greatest extent under the premise of minimizing chain scission to make diesel oil cetane number increase
The existence of these problems makes the coal tar hydrogenation catalyst more difficult to realize industrialization compared with the catalytic hydrogenation catalyst of catalytic cracking gas oil.

Method used

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  • Method for preparing diesel from coal tar

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Experimental program
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Effect test

Embodiment 1

[0022] Catalyst component: Y type molecular sieve 50g contains potassium iodide 0.8g aqueous solution 30ml;

[0023] Preparation method: impregnating the Y-type molecular sieve with an aqueous solution of potassium iodide for 2 hours, and drying at a temperature of 120°C for 2 hours to obtain a catalyst, the properties of which are shown in Table 1;

[0024] Utilize above-mentioned catalyst to carry out coal tar to produce diesel oil:

[0025] Add 300g of coal tar with a water content of 1wt% to the 1000ml autoclave device, and then add 4.5g of catalyst. After the autoclave is sealed, heat the autoclave to raise the temperature to 350°C, keep the temperature for 5 minutes, and then drop to room temperature Finally, the reaction product is taken out from the reactor, and then separated by distillation, and the fraction at 80-280°C is taken to obtain diesel oil; see Table 2 for the properties of diesel oil.

[0026] Potassium iodide in the catalyzer of the present embodiment is...

Embodiment 2

[0028] Catalyst component: ZSM-5 molecular sieve 50g contains potassium iodide 0.8g aqueous solution 25ml;

[0029] Preparation method: ZSM-5 molecular sieve was impregnated with an aqueous solution of potassium iodide for 2 hours, and dried at a temperature of 120° C. for 2 hours to obtain a catalyst whose properties are shown in Table 1;

[0030] Utilize above-mentioned catalyst to carry out coal tar to produce diesel oil:

[0031] Add 300g of coal tar with a moisture content of 0.1wt% to the 1000ml autoclave device, and then add 4.5g of catalyst. After the reactor is sealed, heat the reactor to raise the temperature to 360°C, keep the temperature for 10 minutes, and then drop to room temperature Finally, the reaction product is taken out from the reactor, and then separated by distillation, and the fraction at 80-280°C is taken to obtain diesel oil; see Table 2 for the properties of diesel oil.

[0032] Potassium iodide in the catalyzer of the present embodiment is 1.21% o...

Embodiment 3

[0034] Catalyst component: γ-Al 2 o 3 50g 30ml of aqueous solution containing 1.0g of potassium iodide;

[0035] Preparation method: γ-Al 2 o 3 Immerse in an aqueous solution of potassium iodide for 2 hours and dry for 1 hour at a temperature of 120°C to obtain a catalyst whose properties are shown in Table 1;

[0036] Utilize above-mentioned catalyst to carry out coal tar to produce diesel oil:

[0037] Add 300g of coal tar with a water content of 1.8wt% to the 1000ml autoclave device, and then add 4.5g of catalyst. After the reactor is sealed, heat the reactor to raise the temperature to 350°C, keep the temperature for 15 minutes, and then drop to room temperature Finally, the reaction product is taken out from the reactor, and then separated by distillation, and the fraction at 80-280°C is taken to obtain diesel oil; see Table 2 for the properties of diesel oil.

[0038] Potassium iodide in the catalyzer of the present embodiment is 1.66% of catalyzer weight in terms ...

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Abstract

The invention discloses a method for preparing diesel oil from coal tar. In the method, the coal tar and a catalyst are added into a reactor; after the reactor is closed, the temperature of the reactor is heated to 320-400 DEG C and the temperature is maintained for 0 to 20 minutes; after the temperature is reduced to the room temperature, a reactor product is taken out from the reactor; then distilling and separating are carried out; the cut fraction of 80 to 280 DEG C is taken out, thus obtaining the diesel oil. The method provided by the invention has the advantages of simple technique, low requirements to devices and high conversion rate. The invention belongs to the field of preparing diesel oil from coal tar.

Description

technical field [0001] The invention relates to a method for preparing diesel oil from coal tar, in particular to a method for catalytically preparing diesel oil from coal tar using a catalyst containing molecular sieves. Background technique [0002] my country is a country "poor in oil, rich in coal, and low in gas". On the one hand, about 40%-50% of my country's oil resources need to be imported. On the other hand, in the existing coking industry, the coal tar in the by-product gas is wasted , causing pollution to mines, factories and nature. With the increasing consumption of petroleum resources worldwide and the increasing proportion of imported crude oil year by year, more and more attention has been paid to how to rationally utilize coal tar, a petroleum substitute, to obtain high-quality fuel oil and other chemical raw materials. [0003] In recent years, the market demand for diesel oil has increased year by year. Medium and low temperature coal tar has the characte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C1/20C10C1/14
Inventor 肖钢侯晓峰闫涛
Owner HANERGY TECH
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