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A hydrogenation method for producing clean gasoline

A gasoline and clean technology, applied in hydrotreating process, chemical instruments and methods, and hydrocarbon oil treatment, etc., can solve the problems of limited proportion of blending catalytic diesel oil, high investment in equipment and catalyst, small catalytic diesel oil, etc.

Active Publication Date: 2020-09-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it is possible to process low-quality diesel from catalytic cracking, which increases the processing methods of inferior raw materials and converts them into high-quality products, the proportion of blended catalytic diesel is still limited to a certain extent, and the amount of catalytic diesel that can be processed is very small. Diesel hydrogen consumption is high
[0009] CN103773455A The invention discloses a method for combined hydrogenation of animal and vegetable oils and catalytic diesel oil. Essentially, catalytic diesel oil is processed through hydrogenation and refining. Although catalytic diesel oil can be processed through a suitable raw material ratio, due to the limitation of diesel product indicators , the amount of catalytic diesel that can be blended is very small, which cannot completely solve the problem of processing a large amount of catalytic diesel in large catalytic refineries
Although this method can produce low-sulfur diesel oil, the investment in equipment and catalyst is high, and the operation is difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Take 200g of NaY molecular sieve raw powder prepared in the laboratory, mix it with ammonium nitrate with a concentration of 2.0mol / L according to the liquid-solid ratio of 4:1, exchange at 80°C for 2 hours, repeat this process twice, and the exchanged Y molecular sieve Na content in Na 2 O is calculated as 1.8%;

[0038] (2) Hydrothermally treat the Y molecular sieve obtained in step (1) at 550°C and 0.3Mpa for 2 hours;

[0039] (3) Mix the Y molecular sieve obtained in step (2) with a sodium chloride solution with a concentration of 1.7mol / L according to the liquid-solid ratio of 5:1, exchange at 65°C for 1 hour, repeat this process 3 times, and the Y molecular sieve after exchange Na content in Na 2 O is calculated as 3.8%;

[0040] (4) The molecular sieve obtained in step (3) is mixed with 0.5mol / L ammonium fluorosilicate and 0.3mol / L citric acid (with H + ) solution mixed beating, 85 ℃ for 2 hours;

[0041] (5) The molecular sieve Y after the treatment in ...

Embodiment 2

[0047] (1) Take 200g of NaY molecular sieve raw powder prepared in the laboratory, mix it with ammonium chloride with a concentration of 2.5mol / L according to the liquid-solid ratio of 5:1, exchange at 85°C for 2 hours, repeat this process twice, and the exchanged Y Na content in molecular sieve is Na 2 O is calculated as 1.3%;

[0048] (2) Hydrothermally treat the Y molecular sieve obtained in step (1) at 530°C and 0.15Mpa for 1.5 hours;

[0049] (3) Mix the Y molecular sieve obtained in step (2) with sodium nitrate with a concentration of 1.5mol / L according to the liquid-solid ratio of 5:1, exchange at 80°C for 1 hour, repeat this process twice, and the Na in the exchanged Y molecular sieve The content is 3.6% in terms of Na2O;

[0050] (4) The molecular sieve obtained in step (3) is mixed with ammonium fluorosilicate solution with a concentration of 0.5 mol / L according to the liquid-solid ratio of 5:1 and beaten, and treated at 95°C for 2 hours;

[0051] (5) The Y molecu...

Embodiment 3

[0057] (1) Take 200g of NaY molecular sieve raw powder prepared in the laboratory, mix it with ammonium nitrate with a concentration of 1.6mol / L according to the liquid-solid ratio of 3:1, exchange at 80°C for 2 hours, repeat this process twice, and the exchanged Y molecular sieve Na content in Na 2 O is calculated as 2.0%;

[0058] (2) Hydrothermally treat the Y molecular sieve obtained in step (1) at 550°C and 0.2Mpa for 2 hours;

[0059] (3) Mix the Y molecular sieve obtained in step (2) with a mixed solution containing sodium nitrate and glycerol of 3.0 mol / L and 0.2 mol / L respectively at a liquid-solid ratio of 5:1, exchange at 80°C for 1 hour, repeat This process is performed twice, and the Na content in the Y molecular sieve after exchange is represented by Na 2 O is calculated as 5.3%;

[0060] (4) The molecular sieve obtained in step (3) is mixed with ammonium fluorosilicate solution with a concentration of 0.7mol / L according to the liquid-solid ratio of 10:1 and b...

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Abstract

The invention discloses a hydrogenation method for producing clean gasoline, which includes the following contents: (1) Mixed oil of catalytic light cycle oil and catalytic heavy cycle oil is mixed with hydrogen and enters a hydrogenation pretreatment reactor to perform the role of a hydrorefining catalyst. The reaction is carried out under Trend; (3) The hydrogenation effluent of step (2) is separated into gas phase and liquid phase. The gas phase is recycled and the liquid phase enters the fractionation tower; naphtha, diesel and unconverted oil are obtained by fractionation in the fractionation tower; unconverted oil Circulated to the hydrocracking reactor. This method can significantly increase the yield of high value-added gasoline products and the cetane number of diesel fuel.

Description

technical field [0001] The invention relates to a hydrogenation method for producing clean gasoline, in particular to a hydrogenation method for catalytic light cycle oil and catalytic heavy cycle oil to produce high-quality clean gasoline. Background technique [0002] As crude oil becomes heavier and inferior, and the market demand for heavy oil decreases and the demand for light oil increases, the degree of deep conversion of heavy residual oil continues to increase. Among them, catalytic cracking is one of the heavy oil means of lightening heavy residue oil. However, the properties of the products obtained by catalytic cracking are generally poor, and generally require further treatment to obtain qualified products. The diesel fraction obtained from catalytic cracking generally has the characteristics of high aromatics content, low cetane number, high sulfur and nitrogen content, and it is difficult to directly use it as a product, and it is difficult to effectively imp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/14B01J29/16B01J35/10
CPCC10G67/14B01J29/166B01J2229/20B01J2229/16B01J2029/081C10G2300/307C10G2300/1055C10G2300/1059C10G2400/04B01J35/617B01J35/635B01J35/633
Inventor 崔哲王仲义孙士可吴子明
Owner CHINA PETROLEUM & CHEM CORP
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