Full liquid phase hydrogenation method of coal tar

A technology for liquid-phase hydrogenation and coal tar, which is applied in hydrotreating process, petroleum industry, processing of hydrocarbon oil, etc., can solve the problems of difficult control of reaction heat, high hydrogen consumption, large energy consumption, etc., so as to reduce the non-reaction of hydrogen. Loss, control of reaction heat, effect of saving investment cost

Active Publication Date: 2014-08-06
CHANGLING PETRO CHEM ENG DESIGN
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Problems solved by technology

[0010] CN101126034A discloses a method for producing diesel oil by cracking and hydrogenating coal tar, which realizes the hydrogenation and upgrading of coal tar to produce diesel oil through the process combination of pressurized cracking and catalytic hydrogenation; although these methods adopt different processes to realize the hydrogenation of coal tar Modification, but all belong to the gas-liquid two-phase hydrogenation reaction, there are still relatively serious coking, reaction heat is difficult to control, large energy consumption, high hydrogen consumption and other phenomena in the reaction process

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  • Full liquid phase hydrogenation method of coal tar

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Embodiment 1

[0048] A low-temperature coal tar is used as a raw material, and S1000 solvent oil is used as a co-solvent. The properties of the coal tar hydrogenation raw material are shown in Table 2, and the coal tar hydrogenation raw material is prepared according to the ratio of 1:1. The coal tar hydrogenation raw material oil is 10.0 Under the conditions of MPa and 50°C, the hydrogen is fully dissolved. The pre-hydrogenation reaction conditions are: reaction temperature 210°C, reaction hydrogen partial pressure 10.0MPa, reaction liquid hourly space velocity 3.0h -1 , the reflux rate of the pre-hydrogenated oil is three times that of the pre-hydrogenated oil; the coal tar pre-hydrogenated oil is fully dissolved in hydrogen under the conditions of 10.0MPa and 50°C, and the main hydrogenation reaction conditions are: reaction temperature 300°C , Reactive hydrogen partial pressure 10.0MPa, reaction liquid hourly space velocity 2.0h -1 , the return flow rate of the main hydrogenated oil is ...

Embodiment 2

[0050] A medium-temperature coal tar is used as a raw material, and heavy aromatic solvent oil is used as a co-solvent. The properties of the coal tar hydrogenation raw material are shown in Table 4, and the coal tar hydrogenation raw material is formulated according to the ratio of 1.5:1. The coal tar hydrogenation raw material oil is Under the conditions of 12.0MPa and 80°C, the hydrogen is fully dissolved. The pre-hydrogenation reaction conditions are: reaction temperature 250°C, reaction hydrogen partial pressure 12.0MPa, reaction liquid hourly space velocity 2.5h -1 , the return flow rate of the pre-hydrogenated oil is 5 times that of the pre-hydrogenated oil; the coal tar pre-hydrogenated oil is fully dissolved in hydrogen under the conditions of 12.0MPa and 80°C, and the main hydrogenation reaction conditions are: reaction temperature 330°C , Reactive hydrogen partial pressure 12.0MPa, reaction liquid hourly space velocity 1.5h -1 , the return flow rate of the main hydr...

Embodiment 3

[0052] A high-temperature coal tar is used as a raw material, and a low-temperature coal tar hydrogenated oil is used as a cosolvent. The properties of the coal tar hydrogenated raw material are shown in Table 6, and the coal tar hydrogenated raw material oil is prepared according to the ratio of 2:1. Coal tar The hydrogenation raw material oil is fully dissolved under the conditions of 15.0MPa and 100°C. The pre-hydrogenation reaction conditions are: reaction temperature 280°C, reaction hydrogen partial pressure 15.0MPa, reaction liquid hourly space velocity 2.0h -1 , the reflux rate of the pre-hydrogenated oil is 8 times that of the pre-hydrogenated oil; the hydrogen is fully dissolved in the pre-hydrogenated oil of coal tar under the conditions of 15.0MPa and 100°C, and the main hydrogenation reaction conditions are: reaction temperature 380°C , Reactive hydrogen partial pressure 15.0MPa, reaction liquid hourly space velocity 1.0h -1 , the return flow rate of the main hydro...

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Abstract

The invention discloses a method for full liquid phase hydrogenation of coal tar, which is characterized in that it comprises the following steps: coal tar raw materials are respectively subjected to a full liquid phase prehydrogenation reaction and a full liquid phase main hydrogenation reaction; the main hydrogenation produces oil After oil-gas-liquid separation and distillation, naphtha products, diesel products and tail oil products are produced respectively. The present invention makes coal tar carry out pre-hydrogenation reaction and main hydrogenation reaction in full liquid phase, and the method can be applied to the hydrogenation modification of any one or several full-fraction coal tars in high, medium and low temperature coal tars , in the hydrogenation process, it can effectively inhibit coking, control the heat of reaction, reduce energy loss, realize the long-term operation of the coal tar hydrogenation unit, and at the same time reduce the hydrogen consumption of the entire hydrogenation unit, reduce the investment in compressors, and obtain uniform sulfur and nitrogen content. Clean naphtha, diesel and tail oil products less than 400ppm.

Description

technical field [0001] The invention relates to the effective utilization of coal tar, in particular to a full-liquid-phase hydrogenation treatment method of coal tar. Background technique [0002] The rapid development of the world economy has driven the rapid growth of energy demand and consumption. With the depletion of the world's oil resources and the deepening of my country's energy crisis, changing the energy consumption structure and finding reasonable and economical alternative energy sources are the focus and focus of current research. [0003] my country's coal resource reserves far exceed oil and natural gas resources. Give full play to the advantages of abundant and cheap coal resources, supplement the shortage of domestic oil and gas resources, and transform coal resources from solid fuels to chemical and clean oil raw materials, which can not only improve the economic benefits of enterprises , and can reduce environmental pollution, with good social benefits. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
Inventor 黎大鹏李根忠杨培志李代玉严华
Owner CHANGLING PETRO CHEM ENG DESIGN
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