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Method for preparing coal-based high aromatic potential content raw oil

A high aromatics and raw material oil technology, applied in the field of coal chemical industry, can solve the problems of low added value, difficult to support the development and restriction of downstream PTA and polyester, and achieve the effect of high raw material utilization rate, wide application range of raw materials, and broaden the source

Inactive Publication Date: 2014-08-27
CCTEG CHINA COAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Can only be used as primary products with low added value
Second, as a raw material for deep processing of coal tar, only benzene, phenol, naphthalene, asphalt and other substances can be extracted from it
[0006] The strong domestic demand for aromatic chemicals (such as BTX, etc.) is currently mainly derived from the aromatics production process of "catalytic reforming" technology using petroleum as raw material. The aromatics production technology using petroleum as raw material is limited by domestic resources and regional layout. Difficult to support the development of downstream PTA and polyester industries

Method used

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  • Method for preparing coal-based high aromatic potential content raw oil
  • Method for preparing coal-based high aromatic potential content raw oil
  • Method for preparing coal-based high aromatic potential content raw oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] use figure 1 The technological process of using a shale oil as a raw material, after pretreatment, the pretreated shale oil is distilled and cut by normal pressure distillation or vacuum distillation. The cutting temperature is 370℃, and the cutting temperature is less than 370℃. Light distillate oil and heavy distillate oil above 370°C, and heavy distillate oil above 370°C are feedstock oils for suspended bed hydrocracking. The properties of shale oil full-distillate feedstock oils are shown in Table 1. Heavy distillate oil after hydrocracking light oil and light distillate separated by shale oil distillation can obtain 65~145℃ distillate after hydro-upgrading, that is, the catalytic reforming feedstock oil with high aromatic potential content , The main properties are shown in Table 3. The main process conditions of each process unit are shown in Table 2.

[0066] The vulcanizing agent in this embodiment is sulfur, and the solid concentration in the catalyst slurry is 3...

Embodiment 2

[0069] use figure 2 The process flow of the company uses a medium-temperature coal tar as a raw material. After pretreatment, the pre-treated medium-temperature coal tar is cut under normal pressure distillation. The cutting temperature is 350℃. After cutting, it is divided into light distillate and light distillate less than 350℃. The heavy distillate oil above 350℃ and the heavy distillate oil above 350℃ are feedstock oils for suspended bed hydrocracking. The properties of medium temperature coal tar full distillate feedstock oils are shown in Table 1. After the heavy distillate is hydrocracked, the low-temperature separator oil and the light distillate separated by the coal tar distillation can obtain the 65-150℃ distillate, which is the catalytic reforming feedstock oil with high aromatic content. See Table 3 for properties. The main process conditions of each process unit are shown in Table 2.

[0070] The vulcanizing agent in this embodiment is dimethyl disulfide, and the...

Embodiment 3

[0073] use figure 1 The technological process of the company uses a medium and low temperature coal tar as a raw material. After pretreatment, the pretreated medium and low temperature coal tar is cut by distillation. The cutting temperature is 370°C. After cutting, it is divided into light distillate and light distillate less than 370°C. The heavy distillate oil above 370°C, of ​​which the heavy distillate oil above 370°C is the feedstock oil of the feedstock for suspended bed hydrocracking. The properties of the medium and low temperature coal tar full-distillate feedstock oil are shown in Table 1. After the heavy distillate is hydrocracked, the light oil fraction and the light distillate separated by coal tar distillation can be hydrorefined to obtain a naphtha fraction below 145°C, that is, the catalytic reforming of high aromatic potential content The main properties of raw oil are shown in Table 3. The main process conditions of each process unit are shown in Table 2.

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Abstract

The invention discloses a method for preparing coal-based high aromatic potential content raw oil. The method includes the first step of preprocessing of raw materials, the second step of distillation separation, the third step of hydrocracking of a suspended bed and the fourth step of hydrogenation upgrading. Coal tar or shale oil can serve as the raw materials, direct coal liquefaction generated oil or coal-oil coprocessing generated oil can also serve as the raw materials, the application range of the raw materials is wide, the method can be used for producing coal-based catalytic reforming raw materials with the high aromatic potential content, another path is provided for utilizing high added value of coal-based oil products, and sources of the catalytic reforming raw materials with the high aromatic potential content are broadened.

Description

Technical field [0001] The invention belongs to the field of coal chemical industry, and specifically relates to a preparation method of coal-based high aromatic hydrocarbon potential content feedstock oil. Background technique [0002] Coal tar is an organic mixture dominated by aromatic hydrocarbons. It is an important by-product in the coal pyrolysis / dry distillation process. According to the difference in coal pyrolysis and dry distillation temperature and process methods, coal tar can be divided into low temperature coal tar (pyrolysis temperature 500~650℃), medium temperature coal tar (pyrolysis temperature 700~800℃) and high temperature coal tar (pyrolysis temperature 950~1050℃), their composition is quite different. [0003] High-temperature coal tar comes from coking plants, with an annual output of about 12 million tons, but the actual processing volume is less than 5 million tons per year, which is a serious waste of resources. There are mainly the following three ways:...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
Inventor 张晓静
Owner CCTEG CHINA COAL RES INST
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