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Residual oil hydrogenation method

A technology of residual oil hydrogenation and hydrogenation catalyst, which is applied in the field of residual oil hydrogenation, can solve problems such as complex process operation, lower product quality, and poor system stability, and achieve easy process operation, good product quality, and large operating flexibility Effect

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the existing fluidized bed hydrogenation process has the following disadvantages: (1) The process operation is complicated, requiring the use of complex material level monitors and circulating oil pumps; The bottom of the reactor subsides, causing the unit to be shut down
(2) The amount of catalyst storage in the reactor is low, and the utilization rate of the reactor space is low
(3) The energy consumption is large, and the fluidization of the solid catalyst is realized by injecting a large amount of circulating oil into the circulating oil pump.
(4) There is very little hydrogen in the circulating downcomer, which is a non-hydrogen environment, and the liquid will undergo secondary cracking reactions and coking at high temperatures to reduce product quality
Due to the small difference in liquid velocity in each internal circulation zone, a large proportion of catalysts with different particle sizes will be back-mixed in each circulation zone, so it is still unavoidable to avoid the problem that catalyst deactivation is not synchronized but cannot be recovered separately

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] The specific dimensions of the ebullated bed reactor used in this example are shown in Table 1 below.

[0094] Table 1

[0095] code name

[0096] The above-mentioned ebullating bed reactor was used to carry out the cold model experiment, wherein the solid-phase catalyst added through the catalyst inlet 5 was a spherical catalyst with a particle size of 0.2-0.3mm, and the total storage capacity of the catalyst was 60% of the effective volume of the reactor. The liquid phase uses straight-run kerosene, and the volume space velocity is 0.25-3.0h -1 . Nitrogen is used in the gas phase, and the gas-oil volume ratio is 20-150. Eight gas nozzles 10 are provided, and the gas volume injected into the gas nozzles accounts for 15% of the total gas volume. The experimental results in the changing range of conditions show that the carryover of the solid phase catalyst is extremely low, the maximum is 1.5μg / g. At the same time, it can be observed in the experiment that...

Embodiment 2

[0098] The specific dimensions of the ebullated bed reactor used in this example are shown in Table 2 below.

[0099] Table 2

[0100] code name

value

code name

value

d 1 / mm

300

h 1 / mm

5250

d 2 / mm

220

h 2 / mm

3000

d 3 / mm

400

h 3 / mm

600

[0101] d 4 / mm

360

h 4 / mm

87

d 5 / mm

300

h 5 / mm

480

d 6 / mm

480

α / °

60

d 7 / mm

340

β / °

60

d 8 / mm

540

ω / °

60

d 9 / mm

300

φ / °

60

d 10 / mm

550

θ / °

60

d 11 / mm

440

The total opening area of ​​the first gas separation pipe 24a / mm 2

3000

d 12 / mm

500

The total opening area of ​​the second gas separation pipe 24b / mm 2

6000

d 13 / mm

600

The total opening area of ​​the third gas separation pipe 24c / mm 2

8000

The tot...

Embodiment 3-5

[0105] Embodiments 3 and 4 adopt the medium-sized thermal reactor made according to the ratio of embodiment 1, and embodiment 5 adopts the medium-sized thermal reactor made according to the ratio of embodiment 2, wherein the solid-phase catalyst added through the catalyst inlet 5 is physicochemically The properties are shown in Table 3, and the solid-phase catalyst loading is 55% of the effective volume of the reactor. The residue raw materials are shown in Table 4. Table 5 shows the distillate oil carrying the suspended bed hydrogenation catalyst injected through the catalyst inlet 14 . The amount of gas injected through the nozzle 10 accounts for 20% by volume of the total gas amount. The reaction conditions and test results in the reactor are shown in Table 6.

[0106] table 3

[0107]

[0108] Table 4

[0109] nature

value

Density(20℃) / (g / cm 3 )

1.029

Carbon residue / wt%

19.61

Sulfur content / wt%

4.53

Nitrogen con...

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Abstract

The invention relates to a residual oil hydrogenation method. The method is carried out in a fluidized bed reactor; the fluidized bed reactor comprises a shell (1), a three-phase separation component (2) and an inner pipe (3), wherein the shell (1) comprises an expansion section (11), a transitional section (12) and a straight cylinder section (13) in sequence from top to bottom; the diameter of the expansion section (11) is greater than that of the straight cylinder section (13); the three-phase separation component (2) is arranged in the expansion section (11) and the transitional section (12) to form a three-phase separation region; the inner pipe (3) is arranged at the lower part in the straight cylinder section (13) to form a circulation region and a fluidizing region positioned between the circulation region and the three-phase separation region. The residual oil hydrogenation method comprises the steps: injecting a fluidized bed hydrogenation catalyst and a suspended bed hydrogenation catalyst from the upper part of the fluidizing region to enable the residual oil and hydrogen to be subjected to the hydrogenation reaction in the fluidized bed reactor. According to the residual oil hydrogenation method disclosed by the invention, better reaction effect can be achieved.

Description

technical field [0001] The invention relates to a method for hydrogenation of residue oil, in particular to a method for hydrogenation treatment of residue oil by using an inner circulation fluidized bed reactor, and the method is particularly suitable for processing low-quality residue oil. Background technique [0002] The heavy and inferior crude oil in the world is becoming more and more serious and the market demand for light oil products continues to grow. Therefore, as an effective means of upgrading and lightening residual oil, hydrogenation of residual oil has become one of the development priorities of the oil refining industry. At present, the most commonly used residual oil hydrogenation technology in industry includes fixed bed technology and ebullated bed technology, among which the ebullated bed hydrogenation process has the following advantages: it can process heavy and inferior raw materials with high metal content and high carbon residue value; the reactor t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/02
CPCC10G65/02C10G2300/4006C10G2300/4012C10G2300/4018C10G2300/70
Inventor 邓中活戴立顺牛传峰刘涛邵志才董凯施瑢杨清河
Owner CHINA PETROLEUM & CHEM CORP
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