Method for obtaining liquid paraffin, gasoline and diesel oil via extraction of shale oil

A technology for liquid paraffin and shale oil, which is applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems of shale oil dewaxing, high energy consumption, deactivation, etc. that are not considered, and achieve good economic benefits and industrial application prospects, improve economic benefits, and increase the effect of added value

Active Publication Date: 2014-09-24
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydrogenation conditions of this method are high pressure, high energy consumption, and the catalyst is prone to carbon deposition, resulting in deactivation
[0007] Chinese patent, publication number: CN 102286291A, introduces a method for catalytic conversion of shale oil, including catalytic cracking of shale oil to increase the yield of liquefied gas and gasoline, but the method uses a fluidized bed reactor, and the catalyst is easy to wear and tear
In addition, this method does not consider dewaxing shale oil in order to reduce the specific gravity of shale oil and increase economically valuable by-products
[0008] Chinese patent, publication number: CN101492605A, introduces a method of shale oil hydrogenation process, mainly adopts hydrogenation refining, and processes shale oil with high nitrogen content into refined shale oil with low nitrogen content. Shale oil is denitrified and not processed into high value-added chemicals
However, this method directly hydrotreats coal tar, which easily leads to catalytic carbon deposition and deactivation, and the hydrogenation conditions are harsh and energy-consuming.
In addition, the process does not involve the processing of shale oil

Method used

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  • Method for obtaining liquid paraffin, gasoline and diesel oil via extraction of shale oil
  • Method for obtaining liquid paraffin, gasoline and diesel oil via extraction of shale oil
  • Method for obtaining liquid paraffin, gasoline and diesel oil via extraction of shale oil

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Experimental program
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Effect test

Embodiment 1

[0021] Shale oil is cut into distillate oil and residual oil below 420°C by vacuum distillation. The residual oil is injected into the catalytic distillation tower, and the temperature of the kettle is controlled at 450°C. The distilled oil and gas are contacted with molecular sieve / alumina catalyst for reaction and rectification. Catalytic distillation slip-off oil is mixed with distillate oil lower than 420°C through the raw material pump, mixed with hydrogen, and then heated by a heat exchanger into the hydrodewaxing reactor. The feed temperature is controlled at 380°C; hydrogen partial pressure is 8MPa, and the volume is empty Speed ​​1.0h -1 The volume ratio to hydrogen oil is 800:1. The distillate after hydrofining is distilled under normal pressure and cut into gasoline (150°C, 220°C) according to the distillation temperature.

[0022] The yields and properties of liquid paraffin and gasoline and diesel obtained in this embodiment are shown in Table 1, Table 2 and Ta...

Embodiment 2

[0030] Shale oil is cut into distillate oil and residual oil below 420°C by vacuum distillation. The residual oil is injected into the catalytic distillation tower, and the temperature of the kettle is controlled at 480°C. The distilled oil and gas are contacted with molecular sieve / alumina catalyst for reaction and rectification. Catalytic distillation slip-off oil is mixed with distillate oil lower than 420°C, enters through the raw material pump, mixes with hydrogen, and then enters the hydrodewaxing reactor after being heated by a heat exchanger. The feed temperature is controlled at 380°C; the hydrogen partial pressure is 10MPa, and the volume Speed ​​0.5h -1 The volume ratio to hydrogen oil is 1000:1. The distillate after hydrofining is distilled under normal pressure and cut into gasoline (150°C, 220°C) according to the distillation temperature.

[0031] The yields and properties of liquid paraffin and gasoline and diesel obtained in this embodiment are shown in Tabl...

Embodiment 3

[0039]Shale oil is cut into distillate oil and residual oil below 420°C by vacuum distillation. The residual oil is injected into the catalytic distillation tower, and the temperature of the kettle is controlled at 450°C. The distilled oil and gas are contacted with molecular sieve / alumina catalyst for reaction and rectification. Catalytic distillation slip-off oil is mixed with distillate oil lower than 420°C, enters through the raw material pump, mixes with hydrogen, and then enters the hydrodewaxing reactor after being heated by a heat exchanger. The feed temperature is controlled at 360°C; the hydrogen partial pressure is 12MPa, and the volume Speed ​​0.5h -1 The volume ratio of hydrogen to oil is 600:1. The distillate after hydrofining is distilled under normal pressure and cut into gasoline (150°C, 220°C) according to the distillation temperature.

[0040] The yields and properties of liquid paraffin and gasoline and diesel obtained in this embodiment are shown in Tab...

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Abstract

The invention discloses a method for obtaining liquid paraffin, gasoline and diesel oil via extraction of a shale oil, and belongs to the technical field of petrochemical engineering and energy sources. The method is characterized by comprising the following steps: separating the shale oil in a reduced pressure distillation manner so as to obtain a distillate oil below 420 DEG C and a residual oil, wherein carrying out hydrogenation dewaxing on the residual oil and the distillate oil below 420 DEG C together in a fixed bed reactor filled with a sulfide catalyst after the catalytic distillation cracking of the residual oil; distilling a reaction product so as to obtain the high-quality liquid paraffin and high-quality gasoline and diesel distillate oils. According to the method, the shale oil is treated by using a reduced pressure distillation-hydrogenation dewaxing coupling process, so that the liquid paraffin, the gasoline and the diesel oil which are good in quality are obtained. The specific gravity of the shale oil is decreased and the byproducts with economic values are increased by extracting the liquid paraffin, so that the economic benefit is improved. The method is simple in process, low in energy consumption and high in environmental friendliness, realizes investment saving and is favorable for carrying out deep processing on site so as to increase additional values, thereby providing a new way for the utilization of the shale oil. In addition, the method is good in economic benefit and industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry and energy, and relates to a method for producing liquid paraffin, gasoline and diesel by upgrading shale oil. Background technique [0002] Shale oil refers to the petroleum resources contained in shale formations dominated by shale. It is a brown viscous liquid product with a special pungent smell produced by thermal decomposition of organic matter during oil shale dry distillation. my country has abundant reserves of oil shale resources, including 243.24 billion tons of recoverable oil shale resources; 47.64 billion tons of shale oil resources, 15.97 billion tons of recoverable shale oil resources, and 11.98 billion tons of recoverable shale oil resources. my country's shale oil contains about 40% light diesel oil fraction, which has a high cetane number and can be used as high-speed diesel engine fuel after refining. The shale heavy gas oil fraction contains a large amount of p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
Inventor 梁长海陈霄李闯靳少华
Owner DALIAN UNIV OF TECH
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