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Heavy oil modified viscosity reduction method 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

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

AI Technical Summary

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 suspension bed hydrogenation, so as to solve the problems of high viscosity and poor stability of oil products in the prior art

Method used

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Experimental program
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Effect test

Embodiment 1

[0043] Suspension-bed hydrogenation reaction is carried out after the Venezuelan extra-heavy oil wellhead oil is distilled under the conditions of temperature 390°C, pressure 8MPa, space velocity 0.8h -1 , the ratio of hydrogen to oil is 500:1, the conversion rate of the suspension bed hydrogenation is 10%, and the suspension bed hydrogenation can operate stably for a long period of time at this low conversion rate.

[0044] 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 fractionates the fraction greater than 540°C and circulates it back to the reactor 20, and fractionates the fraction less than 540°C , to enter the blending device. The reaction results are shown in Table 2.

Embodiment 2

[0046] Suspension bed hydrogenation reaction is carried out after the Venezuelan super heavy oil wellhead oil is distilled under the conditions of temperature 410℃, pressure 8MPa, space velocity 0.8h -1 , the ratio of hydrogen to oil is 500:1, the conversion rate of the suspension bed hydrogenation is 20%, and the suspension bed hydrogenation can operate stably for a long period of time at this low conversion rate.

[0047] 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 fractionates the fraction greater than 540°C and circulates it back to the reactor 20, and fractionates the fraction less than 540°C , to enter the blending device. The reaction results are shown in Table 2.

Embodiment 3

[0049] Suspension-bed hydrogenation reaction is carried out after the Venezuelan extra-heavy oil wellhead oil is distilled under the conditions of temperature 425°C, pressure 8MPa, and space velocity 0.8h -1 , the ratio of hydrogen to oil is 500:1, the conversion rate of the suspension bed hydrogenation is 20%, and the suspension bed hydrogenation can operate stably for a long period of time at this low conversion rate.

[0050] 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 fractionates the fraction greater than 540°C and circulates it back to the reactor 20, and fractionates the fraction less than 540°C , to enter the blending device. The reaction results are shown in Table 2.

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Abstract

The invention discloses a heavy oil modified viscosity reduction method and application. The method comprises the steps that 1, gas and straight-run distillation light distillate in heavy oil raw materials are removed in a distilling device for oil separation, and distillate with the API degree smaller than 7 is obtained; 2, the distillate in the step 1 and a homogeneous catalyst are mixed, a hydrogenation reaction occurs in a suspended bed reactor, and after the reacting distillate is separated, gas and a liquid phase product are obtained; 3, the liquid phase product in the step 3 is distilled in a fractionating tower to obtain gas, light distillate and hydrogenation tail oil, and the hydrogenation tail oil returns to the suspended bed reactor; 4, the straight-run distillation light distillate in the step 1, one or more of the light distillate in the step 3 and the heavy oil raw materials are blended into synthetic crude oil with the API degree larger than 12. The heavy oil modified viscosity reduction method and application have the advantages that the viscosity can be effectively reduced by slightly modifying heavy oil, the transportation conditions of pipeline transportation, shipping and tank cars are met, the transportation problem of poor oil products is solved, no coke is generated in the modifying process, and modified viscosity reduction oil is good in stability and does not need to be subjected to hydrotreating 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 increasing production of low-quality heavy oil, the biggest problem is how to solve the transportation problem of low-quality heavy oil. The biggest challenge is how to upgrade low-quality crude oil with high viscosity and poor fluidity into low-viscosity oil that is easy to transport at low cost. fluid. [0003] CN101724441A discloses a combined process method for upgrading heavy oil. The invention organically combines fluidized bed hydrogenation treatment and supercritical treatment, fully utilizes the advantages of the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
Inventor 侯经纬付兴国王东明张艳梅于志敏刘银东颜璐洁
Owner PETROCHINA CO LTD
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