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Method for modifying heavy oil for viscosity reduction and application

A heavy oil modification and viscosity reduction technology, applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems of poor stability and high oil viscosity, achieve good stability, reduce crude oil viscosity, and ensure long cycle The effect of stable operation

Inactive Publication Date: 2016-11-23
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a method and application of heavy oil modification and viscosity reduction, especially a method of modification and viscosity reduction using fluidized bed hydrogenation, so as to solve the problems of high viscosity and poor stability of oil products in the prior art

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  • Method for modifying heavy oil for viscosity reduction and application
  • Method for modifying heavy oil for viscosity reduction and application

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Experimental program
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Effect test

Embodiment 1

[0044] The Venezuelan extra heavy oil wellhead oil is subjected to ebullated bed hydrogenation reaction after distillation treatment, the conditions are temperature: 400°C, pressure 7.5MPa, space velocity 0.8h -1 , the ratio of hydrogen to oil is 500:1, the conversion rate of ebullating bed hydrogenation is 10%, and the ebullating bed hydrogenation can operate stably for a long period of time at this low conversion rate.

[0045] The reacted product 22 enters the separator 30 after being filtered, and the gas phase 34 and the liquid phase 32 are separated, and the liquid phase enters the fractionation tower 40, and the fractionation tower distills out a fraction greater than 540°C and circulates it back to the ebullating bed hydrogenation reactor 20, and fractionates it out The fraction less than 540°C enters the blending device. The reaction results are shown in Table 2.

Embodiment 2

[0047] The Venezuelan extra heavy oil wellhead oil is subjected to ebullated bed hydrogenation reaction after distillation treatment, the conditions are temperature: 410°C, pressure 7.5MPa, space velocity 0.8h -1 , the ratio of hydrogen to oil is 500:1, the conversion rate of ebullating bed hydrogenation is 20%, and the ebullating bed hydrogenation can operate stably for a long period of time at this low conversion rate.

[0048] The reacted product 22 enters the separator 30 after being filtered, and the gas phase 34 and the liquid phase 32 are separated, and the liquid phase enters the fractionation tower 40, and the fractionation tower distills out a fraction greater than 540°C and circulates it back to the ebullating bed hydrogenation reactor 20, and fractionates it out The fraction less than 540°C enters the blending device. The reaction results are shown in Table 2.

Embodiment 3

[0050] Venezuelan extra heavy oil wellhead oil is distilled and subjected to fluidized bed hydrogenation reaction under the conditions of temperature: 425°C, pressure 7.5MPa, space velocity 0.8h -1 , the ratio of hydrogen to oil is 500:1, the conversion rate of ebullating bed hydrogenation is 30%, and the ebullating bed hydrogenation can operate stably for a long period of time at this low conversion rate.

[0051] The reacted product 22 enters the separator 30 after being filtered, and the gas phase 34 and the liquid phase 32 are separated, and the liquid phase enters the fractionation tower 40, and the fractionation tower distills out a fraction greater than 540°C and circulates it back to the ebullating bed hydrogenation reactor 20, and fractionates it out The fraction less than 540°C enters the blending device. The reaction results are shown in Table 2.

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Abstract

The invention discloses a method for modifying heavy oil for viscosity reduction and application. The method comprises the following steps: (1), removing gases and straight-run light-fraction oil from a heavy-oil raw material in a distilling apparatus, and obtaining a distillate of which the API (American petroleum institute) gravity is equal to or less than 7; (2), enabling the distillate obtained in the step (1) to have a hydrogenation reaction in a fluidized bed reactor in the presence of a homogeneous catalyst, and separating reaction distillates to obtain a gas and a liquid-phase product; (3), fractionating the liquid-phase product in a fractionating tower to obtain a gas, light-fraction oil and hydrogenated tail oil, and returning the hydrogenated tail oil to the fluidized bed reactor; (4), blending one or more of the straight-run light-fraction oil obtained in the step (1), the light-fraction oil obtained in the step (3) and the heavy-oil raw material to form oil which is subjected to modification for viscosity reduction and of which the API gravity is above 12. The method for modifying the heavy oil for viscosity reduction and the application have the advantages that the viscosity of heavy oil can be effectively reduced by mild modification to meet conditions of pipeline transportation, shipping and tank wagon transportation and solve a conveyance problem of an inferior oil product, the cost is low, no coke is generated in modification, moreover, oil subjected to the modification for viscosity reduction is good in stability, and a hydrogenation treatment is not necessarily carried out any more.

Description

technical field [0001] The invention relates to a method for modifying and reducing the viscosity of heavy oil, in particular to a method for modifying and reducing the viscosity of inferior heavy oil. Background technique [0002] With the decrease of conventional oil resources and the maturity of heavy oil extraction technology, heavy oil, especially low-quality heavy oil resources, has become an important choice for my country's imported oil. With the development and output of inferior heavy oil increasing day by day, the biggest problem is how to solve the transportation problem of inferior heavy oil. Processing challenges. [0003] CN102746869A discloses a bitumen and heavy oil upgrading method and system for producing synthetic crude oil. The method mainly focuses on integrating Fischer-Tropsch technology with gasification and hydrogen-rich gas flow, and optimizes the hydrogen source. However, the process is complicated, and the investment and operation costs are hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02
Inventor 侯经纬付兴国王东明张艳梅刘银东张璐瑶于志敏张东明
Owner PETROCHINA CO LTD