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Process for producing ultra low sulfur and low aromatic diesel fuel

An ultra-low-sulfur diesel and aromatic technology, applied in the direction of fuel, liquid carbon-containing fuel, refined hydrocarbon oil, etc., can solve the problems of hydrogen increasing operating costs, overcoming, and huge investment, so as to reduce the amount of hydrogen, extend the service life, The effect of less investment

Inactive Publication Date: 2011-11-16
SK INNOVATION CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods and technologies all have the following disadvantages: due to the excessive consumption of hydrogen, the operating cost is increased, and huge investment is required to improve the existing desulfurization process or introduce new process equipment
However, as mentioned above, this method requires many process stages to be added, and the existing method is considerably changed, so there is no problem of overcoming the conventional method in terms of process simplicity and economical efficiency.

Method used

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  • Process for producing ultra low sulfur and low aromatic diesel fuel
  • Process for producing ultra low sulfur and low aromatic diesel fuel
  • Process for producing ultra low sulfur and low aromatic diesel fuel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] In this example, the properties of each sample material used and the change in yield of straight-run gas oil depending on the cut point are described. All of the following sample materials were prepared from the same straight-run gas oil, except that the samples in the last column of Table 3 were blends with straight-run heavy gas oil. In Table 3 the main properties of the samples prepared from fractions separated according to the TBP cut points of 340°C and 360°C are given. In Table 4, the yields of light oil oil (LGO) are summarized according to different cut points. From the data in Table 4, it can be seen that for every 10°C change in the TBP cut point, the yield is expected to change by about 5.6% by volume. However, since the nature, composition and yield of the fractions depend on the nature of the crude oil used, yield variations are not intended to limit the scope of the invention.

[0075] table 3

[0076] Properties of Straight Run Diesel

[0077]

[0...

Embodiment 2

[0086] The desulfurization properties of the three gas oil samples (basic, 340°C-, 360°C-) of Table 3 were analyzed under the experimental conditions listed in Table 5 below. A reaction experiment was conducted in a continuous type reactor to measure the desulfurization temperature and hydrogen consumption required to reduce the sulfur content to 10 ppm. The results are summarized in Table 6 below.

[0087] table 5

[0088] Experimental conditions

[0089] catalyst

[0090] Table 6

[0091] basic

[0092] It can be clearly seen from the data in Table 6 that when the fraction obtained from straight-run gas oil with a boiling point not higher than the cut point set at 320-340°C is subjected to hydrodesulfurization under deep desulfurization conditions, the sulfur content can be reduced to The reduction to 10 ppm or less requires a reduction in reaction temperature of 18°C ​​or more. Taking this result into account, it is expected that the present invent...

Embodiment 3

[0094] The controlled aromatics composition changes in Example 2 are given in Table 7 below. In addition, the saturation ratio of monoaromatics was measured as a function of reaction temperature for all base cuts, 340°C-cuts and 360°C-cuts.

[0095] Table 7

[0096] Aromatic content

[0097]

[0098] Saturation rate of monoaromatic species:

[0099] (Hydrogenation conversion rate) = [(A+B+C)-D] / (A+B+C)

[0100] A: Concentration of diaromatics in the feed (weight %)

[0101] B: Concentration of diaromatics in the product (% by weight)

[0102] C: Concentration of monoaromatics in the feed (weight %)

[0103] D: Concentration of diaromatic species in the product (weight %)

[0104] Such as Figure 6 As shown, lower cut point of straight-run diesel yields higher hydrogen conversion of monoaromatics.

[0105] Figure 7 The saturation ratio of monoaromatics in each base cut, 340°C-cut and 360°C-cut is shown. At the same reaction temperature, the hydrogenation conversio...

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Abstract

On the basis of the finding that hydrogenation reactivity with aromatics, as well as desulfurization reactivity, is closely correlated with the distillation properties of feedstock straight-run gasoil, the disclosed process is provided for separating the straight-run gasoil effluent from a crude distillation unit so as to afford a feedstock having properties good enough to be treated in a post-hydrodesulphurization process, thereby not only utilizing pre-existing hydrodesulphurization units to the maximum, but also significantly reducing aromatic levels. The process allows the production of diesel fuel meeting the WWFC category-4 standard, requiring the minimum possible investment in new facilities.

Description

technical field [0001] The invention relates to a method for producing ultra-low sulfur diesel fuel through hydrogen addition catalytic reaction. More specifically, the present invention relates to a process for the production of ultra-low sulfur and low aromatics diesel fuel in which the straight run diesel effluent from the crude distillation unit is separated to obtain The treated feed not only maximizes the utilization of the existing hydrodesulfurization unit, but also significantly reduces the content of aromatic substances. Background technique [0002] At present, although many alternative energy sources have been actively developed in order to improve air quality and prevent global warming, gasoline and diesel fuels are expected to continue to dominate the automotive fuel market for a considerable period of time, and their usage is gradually increasing every year . However, in response to actions to improve the global environment, the market demands high-quality f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/06
CPCC10G2300/4012C10G45/02C10L1/08C10G2400/06C10G2300/202C10G2400/04C10G2300/4018C10G2300/4006C10G2300/1033C10G2300/301C10G45/08C10G45/12C10G45/58C10G65/14C10G65/16B21B15/0085B21B45/0284B21B45/06B21B2015/0014B21B2015/0057C23G3/02
Inventor 刘益相金明俊赵仁镐朴哲佑金奎泰柳在旭申池宣朴城范
Owner SK INNOVATION CO LTD
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