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Two-stage hydrofining method of inferior oil

A low-quality oil, two-stage technology, applied in the field of oil hydrorefining, can solve the problems of easy coking and high gas yield, and achieve the effects of high conversion rate, low gas yield and avoiding coking.

Active Publication Date: 2014-10-22
山东三聚生物能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is that in the prior art, when low-quality oil is subjected to slurry bed hydrocracking, there are problems of easy coking and excessive gas production rate, thereby proposing a method that can effectively avoid coking and gas production. Two-stage hydrorefining method for inferior oil with low yield

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment provides a two-stage hydrorefining method for low-quality oil, the low-quality oil is vacuum residue, which includes the following steps:

[0033] (1) Mix the vacuum residue with hot hydrogen, send the preheated material into the coal slurry preheater and send it to the first slurry bed reactor, and carry out hydrogenation reaction in the presence of hydrogenation catalyst and co-catalyst , while reacting, the hydrogenation reaction product is subjected to gas-liquid separation; the hydrogenation reaction temperature in the above-mentioned first slurry bed reactor is 350°C, the pressure is 15Mpa, and the gas-liquid ratio is 800NL / kg;

[0034] The hydrogenation catalyst includes a Fe-based catalyst and a noble metal catalyst, the Fe-based catalyst is a waste agent of the γ-FeOOH desulfurizer, the amount added is 1wt% of the inferior oil in terms of Fe, and the noble metal catalyst is a deactivated Mo-based catalyst, The amount added is 1wt% of the Fe in t...

Embodiment 2

[0041] This embodiment provides a two-stage hydrorefining method for low-quality oil, the low-quality oil is a mixture of atmospheric residue and high-bituminous oil, which includes the following steps:

[0042] (1) Mix the low-quality oil with hot hydrogen, send the preheated material into the coal slurry preheater and send it to the first slurry bed reactor, and carry out hydrogenation reaction in the presence of a hydrogenation catalyst and a cocatalyst , while reacting, the hydrogenation reaction product is subjected to gas-liquid separation; the hydrogenation reaction temperature in the above-mentioned first slurry bed reactor is 420°C, the pressure is 25Mpa, and the gas-liquid ratio is 1500NL / kg;

[0043] The hydrogenation catalyst includes a Fe-based catalyst and a noble metal catalyst, wherein the Fe-based catalyst is a waste agent of the γ-FeOOH desulfurizer, and the amount added is 3wt% of the inferior oil in terms of Fe. The γ-FeOOH described in this embodiment Bitu...

experiment example

[0050] In order to prove the technical effect of the two-stage hydrorefining method for low-quality oil described in the present invention, in this experimental example, the yield in the hydrogenation process described in the above-mentioned Example 1 and Example 2 was measured. in:

[0051] Product yield %=gasoline, diesel oil / poor oil (and coal) × 100% of ≤ 360 ℃ that step (5) fractionating tower obtains;

[0052] Gas yield % = gas fraction generated during the entire hydrogenation process / inferior oil (and coal) × 100%;

[0053] Water yield % = water produced in the whole hydrogenation process / inferior oil (and coal) × 100%;

[0054] Hydrogen consumption% = hydrogen consumed in the entire hydrogenation process / inferior oil (and coal) × 100%;

[0055] The above-mentioned yields are all percentages by mass, and the low-quality oil raw material is based on anhydrous and ash-free base.

[0056] Adopt method of the present invention to carry out the measurement result a...

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Abstract

The invention relates to a two-stage hydrofining method of inferior oil. The two-stage hydrofining method comprises the following steps of firstly carrying out mild hydrocracking reaction on inferior oil by virtue of a first slurry bed reactor; carrying out gas-liquid separation on the hydrogenation reaction product while reacting, delivering liquid materials into a second slurry bed reactor by virtue of a high-temperature high-pressure centrifugal pump located at the bottom of the reactor, and according to the level control of the reactor, adjusting the delivery capability of the centrifugal pump; and further carrying out hydrocracking reaction on the liquid material obtained by the gas-liquid separation by virtue of the second slurry bed reactor so as to enable easily coked components in inferior oil to be converted into light-weight oil and separated out, enable light-weight components which are easily cracked into gas in the hydrofining process to be separated and removed away and enable components which are difficult to be reacted in the inferior oil to be effectively converted. According to the method disclosed by the invention, by virtue of the two-stage slurry bed reactor, the inferior oil is subjected to gas-phase online hydrofining, the coking can be effectively avoided, the gas production rate is small, the conversion rate is high and more gasoline and diesel are obtained.

Description

technical field [0001] The invention relates to a two-stage hydrogenation refining method for inferior oil, belonging to the field of oil hydrogenation refining. Background technique [0002] In recent years, due to rising international oil prices, the deep utilization of oil, especially residual oil and other low-quality oils, has been paid more and more attention. The current low-quality oil utilization mainly adopts a single fixed-bed hydrogenation technology, which is to carry out fixed-bed hydrocracking and refining of the residual oil obtained after petroleum distillation, so as to obtain gasoline and diesel products. This single fixed-bed hydrogenation technology Although the utilization rate of residual oil can be improved to a certain extent, the yield of gasoline and diesel oil is still low, and the economic performance of the process is poor. In addition, it is also possible to directly carry out delayed coking of residual oil or mined heavy oil, high-sulfur oil,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02C10G49/02C10G49/04
Inventor 任相坤崔永君井口宪二刘欢赵志利丁同利周晓艳高忠超
Owner 山东三聚生物能源有限公司
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