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A kind of method that utilizes coal tar to prepare diesel oil

A technology of coal tar and diesel oil, which is applied in chemical instruments and methods, hydrogenation of aromatics, catalysts in physical/chemical processes, etc., can solve problems such as limited protective agent effect, reduce design difficulty and equipment cost, and save cumbersome The effect of steps

Active Publication Date: 2018-11-23
辽宁东颢化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN1147575C invented a method for producing diesel oil from coal tar. Through the catalyst loading scheme of two-stage gradation or three-stage gradation, protective agent, hydrofining catalyst and dearomatization catalyst are added to the reaction system, and a certain effect is achieved. However, the protective agent has a limited effect and cannot maximize the efficiency of the hydrogenation reaction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for hydrogenation of coal tar to fuel oil, mixing hydrogen gas with a hydrogen-to-oil volume ratio of 1000 and coal tar fractions into the reactor, the reaction temperature is 370°C, the reaction pressure is 10MPa, and the space velocity is 2h -1 , The reaction is carried out under the action of a catalyst, and the liquid product is obtained through gas-liquid separation.

[0023] The active components of the catalyst are Co, Mo, W, and the carrier is nano-Al 2 o 3 Support, catalyst composition is 5wt% CoO, 17.5wt% MoO 3 , 20wt% WO 3 , and the rest are nano-Al 2 o 3 carrier, as shown in Figure 1, nano-Al 2 o 3 The particle diameter of the carrier is 5-20nm, most of which are between 5-10nm.

[0024] The product yield can reach 97%, the S content is 159 μg, the N content is 228 μg, the aromatic hydrocarbon content is 32.8%, and it can be used as finished fuel oil.

Embodiment 2

[0026] The invention provides a method for preparing diesel oil from coal tar.

[0027] A method for hydrogenation of coal tar to diesel oil, mixing hydrogen gas with a volume ratio of hydrogen to oil of 1000 and coal tar fractions into a reactor, the reaction temperature is 320-345 °C, the reaction pressure is 2-5 MPa, and the space velocity is 2- 3 hours -1 , The reaction is carried out under the action of a catalyst, and the liquid product is obtained through gas-liquid separation.

[0028] Coal tar is prepared the preparation method of diesel oil catalyst:

[0029] After the carrier was dried at 120°C for 20 minutes, it was impregnated in the iodine-containing compound solution. The temperature was kept at 50°C for 1 hour, and the carrier was taken out and dried in an oven at 110°C for 1 hour; add acid-modified attapulgite with 4% of the mass of the carrier to Co, In the nitrate mixed solution of Mo and W, after stirring evenly, immerse the above-mentioned dry carrier in...

Embodiment 3

[0036] The invention provides a method for preparing diesel oil from coal tar.

[0037] A method for hydrogenation of coal tar to diesel oil, mixing hydrogen with a hydrogen-to-oil volume ratio of 900 and coal tar fractions into a reactor, the reaction temperature is 310-325 ° C, the reaction pressure is 4-6 MPa, and the space velocity is 2- 3 hours -1 , The reaction is carried out under the action of a catalyst, and the liquid product is obtained through gas-liquid separation.

[0038] Coal tar is prepared the preparation method of diesel oil catalyst:

[0039] After the carrier was dried at 110°C for 20 minutes, it was impregnated in an iodine-containing compound solution. The temperature was kept at 40°C for 1 hour, and the carrier was taken out and dried in an oven at 110°C for 1 hour; 3% acid-modified attapulgite was added to Co, In the nitrate mixed solution of Mo and W, after stirring evenly, immerse the above-mentioned dry carrier in this mixed solution for 3 hours, ...

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Abstract

The invention discloses a method for preparing diesel through coal tar. Hydrogen and the coal tar are distilled and mixed and then enter a reactor with the hydrogen and oil volume ratio of 850:1100. The reaction temperature is 290-365 DEG C, the reaction pressure is 2-9 MPa, and the air speed is 2-4 / h. A reaction is conducted under the action of catalyst, and a liquid product is obtained after gas-liquid separation.

Description

technical field [0001] The invention relates to a method for producing diesel oil from coal tar. Background technique [0002] Generally speaking, coal tar is produced by carbonization of coal, which is divided into low-temperature carbonization, medium-temperature carbonization and high-temperature carbonization. Among them, the yield of coal tar in low-temperature carbonization of coal is the highest, and coal suitable for low-temperature carbonization is non-caking. Non-coking coal, such as lignite or highly volatile bituminous coal, is abundant in my country and is the basis for low-temperature dry distillation to produce coal tar and diesel oil. The low-temperature dry distillation process is much simpler than coal gasification or direct liquefaction, and the conditions are mild. If it can be used reasonably, it can become a good source of diesel production. [0003] CN88105117 discloses a formula and preparation method of a substitute fuel oil for diesel oil. It uses c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/08C10G45/50B01J23/888B01J29/16
Inventor 李建树
Owner 辽宁东颢化工有限公司
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