Full liquid phase hydrogenation method of coal tar

A liquid-phase hydrogenation and coal tar technology, which is applied in the fields of hydrogenation treatment process, petroleum industry, and hydrocarbon oil treatment, can solve the problems of difficult control of reaction heat, high hydrogen consumption, and large energy consumption, so as to reduce hydrogen non-reaction The effect of reducing loss, controlling reaction heat, and saving investment costs

Active Publication Date: 2012-07-18
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 production of coal tar through the process combination of pressure cracking and catalytic hydrogenation Diesel oil; although these methods use different processes to realize the hydrogenation and upgrading of coal tar, they all belong to the gas-liquid two-phase hydrogenation reaction, and the reaction process still has relatively serious coking, difficult control of reaction heat, high energy consumption, and high hydrogen consumption. Phenomenon

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  • Full liquid phase hydrogenation method of coal tar
  • Full liquid phase hydrogenation method of coal tar
  • Full liquid phase hydrogenation method of coal tar

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Effect test

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 full liquid phase hydrogenation method of coal tar, which is characterized by comprising the following steps that coal tar raw materials respectively perform full liquid phase pre-hydrogenation reaction and full liquid phase main hydrogenation reaction, and main hydrogenation generated oil respectively generates naphtha products, diesel products and tail oil products through oil gas-liquid separation and distillation. The full liquid phase hydrogenation method enables the coal tar to perform the pre-hydrogenation reaction and the main hydrogenation reaction under the full liquid phase. The method can be suitable for hydrogenation modification of full fraction coal tar of any one or more of high-temperature coal tar, middle-temperature coal tar and low-temperature coal tar. During hydrogenation, coking can be effectively inhibited, reaction heat is controlled, energy loss is reduced, long-period running of a coal tar hydrogenation device is achieved, hydrogen consumption of the whole hydrogenation device can be reduced, investment of a compressor is reduced, and clean naphtha, diesel and tail oil products with sulfur nitrogen contents smaller than 400 parts per million (ppm) can be obtained.

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 Applications(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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