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Method for producing clean diesel oil and light aromatic hydrocarbons from inferior diesel oil

A technology for low-quality diesel oil and light aromatics, which is applied in the fields of hydrocarbon oil treatment products, petroleum industry, and hydrocarbon oil treatment. It can solve the problems of low separation efficiency in the extraction process, poor selectivity of aromatics, and harsh reaction conditions, and achieve low reaction pressure. , less loss of aromatics and high selectivity

Active Publication Date: 2016-05-04
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In the above method, although the LCO-X process can utilize low-quality diesel resources to produce BTX light aromatics, the reaction conditions are harsh, the selectivity of aromatics is poor, and the quality of diesel in the product is poor. The aromatics extraction process separates aromatics from diesel and processes them in a targeted manner , which improves the selectivity of product aromatics and the quality of diesel oil, but the separation efficiency of the extraction process is low, and four-stage extraction is usually required to meet the requirements. Combining medium and low pressure hydrotreating and lightening technology can realize the optimal utilization of inferior diesel oil

Method used

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  • Method for producing clean diesel oil and light aromatic hydrocarbons from inferior diesel oil
  • Method for producing clean diesel oil and light aromatic hydrocarbons from inferior diesel oil
  • Method for producing clean diesel oil and light aromatic hydrocarbons from inferior diesel oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) The catalyst used in the hydrotreating of raw diesel oil is Ni / Mo-Al 2 o 3 Commercial catalyst FH-98, the loading capacity of the catalyst in the hydrofining reactor is 200ml, the reaction temperature is 380°C, the reaction pressure is 6MPa, and the reaction space velocity is 1.0h -1 , the properties of the obtained hydrogenated diesel are shown in Table 2.

[0041] (2) Hydrogenated diesel pretreatment adsorption, the pretreatment adsorbent is industrial X molecular sieve, the specific surface area is 490m 2 / g, silicon aluminum ratio SiO 2 / Al 2 o 3 =2.5, the loading capacity of the adsorbent is 400ml, the adsorption temperature is 30°C, the pressure is 0.8MPa, and the adsorption space velocity is 0.5h -1 .

[0042] (3) The simulated moving bed adsorption device contains 12 adsorption beds, which are divided into adsorption area, isolation area, regeneration area and refining area. Silicon, the content of MgO is 1.98wt%, the rest is SiO 2 , the specific sur...

Embodiment 2

[0045] (1) Hydrofining of raw diesel is the same as in Example 1, and the properties of the obtained hydrogenated diesel are shown in Table 2.

[0046] (2) The adsorbent used for hydrogenated diesel pretreatment adsorption is clay, and other conditions are the same as in Example 1.

[0047] (3) The adsorption temperature of the simulated moving bed was 75°C, the valve switching time was 320-360s, the mass ratio of desorbent to raw material feed was 1.8:1, other conditions were the same as in Example 1, and the composition of each component was shown in Table 3.

[0048] (4) Heavy aromatics and hydrogen are mixed into the lightening reactor, the content of the catalyst Pt used is 0.15%, the reaction pressure is 3.0MPa, the reaction temperature is 370~380°C, other conditions are the same as in Example 1, and the lightening The product composition is shown in Table 4.

Embodiment 3

[0050] (1) Hydrofining of raw diesel is the same as in Example 1, and the properties of the obtained hydrogenated diesel are shown in Table 2.

[0051] (2) The adsorbent used in the pretreatment of hydrogenated diesel oil is alumina, and other conditions are the same as in Example 1.

[0052] (3) The adsorption temperature of the simulated moving bed was 80°C, the valve switching time was 300-340s, the mass ratio of desorbent to raw material feed was 1.6:1, other conditions were the same as in Example 1, and the composition of each component was shown in Table 3.

[0053] (4) Heavy aromatics and hydrogen are mixed into the lightening reactor, the catalyst Pt content used is 0.13%, the reaction pressure is 3.2MPa, the reaction temperature is 370~380°C, other conditions are the same as in Example 1, and the lightening The product composition is shown in Table 4.

[0054] Table 1 Data sheet of raw material diesel oil properties

[0055]

[0056] Table 2 Diesel properties dat...

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Abstract

The invention relates to a method for producing clean diesel oil and light aromatic hydrocarbons from inferior diesel oil. The method includes the following steps: (1) carrying out low-medium pressure hydrogenation on the inferior diesel oil to remove sulfur and nitrogen compounds, olefins and colloids, to obtain hydrofined diesel oil; (2) adsorbing and separating the refined diesel oil through a simulated moving bed to remove aromatic hydrocarbons and sulfides, to obtain the clean diesel oil and heavy aromatic hydrocarbons; and (3) allowing the heavy aromatic hydrocarbons to enter a lightening reactor, carrying out a hydrogenation reaction under low and medium pressure to produce BTX light aromatic hydrocarbons, a gasoline component and a small amount of light hydrocarbons. The process for producing the clean diesel oil and the light aromatic hydrocarbons from the inferior diesel oil can treat catalytic cracked diesel oil and coked diesel oil, produces the clean diesel oil and the gasoline components which can meet the country V standard, and simultaneously by-produces the BTX light aromatic hydrocarbons.

Description

technical field [0001] The invention belongs to the field of clean oil production, in particular to a method for producing clean diesel and light aromatics from inferior diesel. technical background [0002] The aromatics in diesel are mainly heavy aromatics, which have poor combustion performance and are the main cause of PM2.5 particulate matter emissions from diesel vehicle exhaust, especially polycyclic aromatics, which are carcinogenic and mutagenic, and are the main one of the pollutants. Under the situation of developing low-carbon economy, circular economy and achieving sustainable development, the pace of upgrading the quality of oil products in my country has been significantly accelerated, and the requirements for the content of aromatics in diesel are becoming more and more stringent. The production of clean oil products has become one of the key points in the development of my country's oil refining industry. my country's crude oil is mainly heavy and low-qual...

Claims

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Application Information

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IPC IPC(8): C10G67/00
CPCC10G67/00C10G2300/1055C10G2300/1059C10G2300/202C10G2300/70C10G2400/04C10G2400/06C10G2400/30
Inventor 臧甲忠于海斌李滨范景新李健汲银平赵训志姜雪丹刘洋宫毓鹏李世松
Owner CHINA NAT OFFSHORE OIL CORP
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