Preparation method of liquid fuel

A technology for liquid fuels and raw materials, applied in the field of coal chemical industry, can solve the problems of short operation cycle, low hydrogenation depth, and no relevant reports.

Active Publication Date: 2015-04-22
CHNA ENERGY INVESTMENT CORP LTD +2
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Problems solved by technology

In this process, the yield of liquid fuel is low, and the operation is difficult and the operation period is short.
Chinese patent 101302444A provides a method for producing oil by hydrocracking coal tar pitch. This method has disadvantages such as long route, easy catalyst deactivation, low pitch conversion rate, low hydrogenation depth, poor oil quality, and short operating cycle.
Under the condition of coal liquefaction, bitumen can also be converted into vehicle fuel through pyrolysis and hydrocracking, but there is no relevant report on the co-processing method of coal and bitumen
[0009] From the above, it can be seen that the existing process of using bitumen to prepare liquid fuel has the problems of high operational difficulty and low bitumen conversion rate

Method used

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preparation example Construction

[0025] As described in the background art, the existing process for preparing liquid fuel from bitumen has the problems of high operational difficulty and low conversion rate of bitumen. In order to solve the above problems, the present invention provides a method for preparing liquid fuel, comprising the following steps: S1, mixing raw coal, bitumen and coal liquefaction circulating solvent to obtain a mixture; S2, making the above mixture under the action of a catalyst Liquefaction reaction, after the gas-liquid separation of the liquefaction reaction product, to obtain coal liquefied oil; and S3, the above-mentioned coal liquefied oil is subjected to catalytic hydrogenation reaction, and the liquid phase product of catalytic hydrogenation is subjected to fractional distillation to obtain liquid fuel and coal liquefaction circulating solvent . In the above preparation method provided by the present invention, the bitumen is mixed with coal for co-processing, undergoing lique...

Embodiment 1

[0041] On the coal direct liquefaction continuous test device, the raw coal and the coal liquefaction circulating solvent are mixed in a coal slurry tank to obtain a coal slurry; then the coal slurry is mixed with coal tar pitch at 150°C to obtain an oil-coal slurry, in which the oil-coal The coal powder in the slurry accounts for 40% of the total weight of the oil-coal slurry, the amount of coal tar pitch added accounts for 10% of the total weight of the oil-coal slurry, and the viscosity of the obtained oil-coal slurry is less than 1000mpa.s (at 60°C). The basic properties of raw coal are shown in Table 1; the circulating solvent is distillate oil with a distillation range of 220-450°C for direct coal liquefaction, and its basic properties are shown in Table 2; coal tar pitch is obtained by reprocessing the product of coal dry distillation (coal tar). The basic properties obtained are listed in Table 3.

[0042] Add hydrated iron oxide catalyst in the prepared oil coal slurr...

Embodiment 2

[0046] On the coal direct liquefaction continuous test device, the raw coal and the coal liquefaction circulating solvent are mixed in a coal slurry tank, and then the coal slurry is mixed with coal tar pitch at 150°C to obtain an oil-coal slurry, wherein the coal powder in the oil-coal slurry Accounting for 40% of the total weight of the oil-coal slurry, the amount of coal tar pitch added accounts for 20% of the total weight of the oil-coal slurry, and the viscosity of the oil-coal slurry is less than 1000mpa.s (at 60°C). The basic properties of raw coal are shown in Table 1; the circulating solvent is distillate oil with a distillation range of 220-450°C for direct coal liquefaction, and its basic properties are shown in Table 2; coal tar pitch is obtained by reprocessing the product of coal dry distillation (coal tar). The basic properties obtained are listed in Table 3.

[0047] Add hydrated iron oxide catalyst in the prepared oil coal slurry, the addition amount of cataly...

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Abstract

The invention discloses a preparation method of a liquid fuel. The preparation method comprises the following steps: S1, mixing feed coal, asphalt and liquefaction cycle solvent to obtain oil-coal slurry; S2, carrying out a liquidation reaction on the oil-coal slurry in the presence of a catalyst, and carrying out gas-liquid separation on the product of the liquidation reaction to obtain coal liquefaction oil; and S3, carrying out a catalytic hydrogenation reaction on the coal liquefaction oil, and fractionating the liquid-phase product of catalytic hydrogenation to obtain the liquid fuel and the liquefaction cycle solvent. With the adoption of the preparation method provided by the invention, coal conversion rate and oil yield can both be increased; meanwhile, hydrogen consumption is reduced, and gas yield and water yield are reduced; the purpose of co-converting coal and asphalt into the automotive liquid fuel is realized, the problem of processing and utilization of asphalt substances is solved, the utilization value of asphalt is increased, and a new way is provided for the comprehensive utilization of the asphalt substances.

Description

technical field [0001] The invention relates to the field of coal chemical industry, in particular to a preparation method of coal liquid fuel. Background technique [0002] Coal direct liquefaction refers to the process of coal hydrocracking in the presence of high temperature and high pressure, hydrogen, solvents and catalysts to produce liquid products; the solid coal is directly converted into oil to achieve clean utilization of coal, and to a certain extent, can ease pressure on oil supplies. Coal and oil co-processing technology is one of the major advances in the field of direct coal liquefaction research since the 1980s. [0003] In the current research on coal and oil co-processing technology, heavy oil is often used to replace or partially replace the circulating solvent of coal direct liquefaction, and the coal is directly hydrogenated and liquefied into oil. Heavy oil mainly comes from the petroleum system, including catalytic cracking and refining oil, catalyt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/08C10G67/02
CPCC10G1/002C10G1/083C10G1/086C10G69/02C10G2300/44C10G2300/70
Inventor 高山松李克健张传江杨葛灵章序文李永伦王洪学姜元博
Owner CHNA ENERGY INVESTMENT CORP LTD
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