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Thermal cracking method for reducing viscosity and condensation point of extra-heavy crude oil

A technology of thermal cracking and crude oil, applied in the field of non-catalytic thermal cracking of hydrocarbon oil, which can solve the problems of no good treatment method for the heavy components released, loss of synthetic crude oil yield, low yield of synthetic crude oil, etc., and achieve stability High stability, high yield and low freezing point

Active Publication Date: 2013-01-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of this method is relatively complicated, and the thermally cracked heavy oil needs to be removed to meet the requirements of crude oil pipeline transportation, and the yield of synthetic crude oil is low
[0008] To sum up, in the existing technology, all or part of the heavy components of the raw materials must be removed to produce synthetic crude oil that meets the requirements of crude oil pipeline transportation. There is no better and economical treatment method in the oil field

Method used

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  • Thermal cracking method for reducing viscosity and condensation point of extra-heavy crude oil
  • Thermal cracking method for reducing viscosity and condensation point of extra-heavy crude oil

Examples

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Effect test

Embodiment 1

[0038] After the extra-heavy crude oil is flashed at normal pressure, the atmospheric residue enters the vacuum heating furnace to be heated to 390°C and then enters the vacuum flash column. The vacuum residue extracted from the bottom of the vacuum flash tower enters the tower reactor for 2.5 hours of mild heat treatment, the reaction temperature is 385°C, and the pressure is 0.2MPa. The vacuum distillate oil enters the furnace tube reactor for thermal cracking reaction, the reaction temperature is 500° C., the reaction pressure is 0.4 MPa, and the reaction time is 4 minutes. The crude oil produced by mixing atmospheric distillate oil, visbreaking heavy oil, thermally cracked light oil and thermally cracked heavy oil has a kinematic viscosity of 185.5mm at 80°C 2 / s, the freezing point is 8°C, and the stability reaches level 1. The operating period of the furnace tube reactor is 18 months.

Embodiment 2

[0040] After the extra-heavy crude oil is flashed at normal pressure, the atmospheric residue enters the vacuum heating furnace to be heated to 410°C and then enters the vacuum flash column. The vacuum residue extracted from the bottom of the vacuum flash tower enters the tower reactor for 1.5 hours of mild heat treatment, the reaction temperature is 405°C, and the pressure is 0.2MPa. The vacuum distillate oil enters the furnace tube reactor for thermal cracking reaction, the reaction temperature is 530° C., the reaction pressure is 1.0 MPa, and the reaction time is 2 minutes. The crude oil produced by mixing atmospheric distillate oil, visbroken heavy oil, thermally cracked light oil and thermally cracked heavy oil has a kinematic viscosity of 54.35mm at 80°C 2 / s, the freezing point is 2°C, and the stability reaches level 2. The operating period of the furnace tube reactor is 9 months.

[0041] It can be seen from the examples and comparative examples that the synthetic cr...

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Abstract

The invention relates to a thermal cracking method for reducing the viscosity and the condensation point of extra-heavy crude oil, comprising the following steps: separating the extra-heavy crude oil into ordinary pressure distillate oil, vacuum distillate oil and vacuum residuum through distillation; respectively carrying out high-temperature thermal cracking for the vacuum distillate oil and mitigated thermal treatment for the vacuum residuum; and mixing all liquid distillates and liquid products so as to obtain synthetic crude oil. The synthetic crude oil prepared by the thermal cracking method has high yield coefficient, low viscosity and condensation point and high stability.

Description

technical field [0001] The invention relates to a thermal cracking method for reducing the viscosity and freezing point of super-heavy crude oil, which belongs to the non-catalytic thermal cracking of hydrocarbon oil in the absence of hydrogen. Background technique [0002] With the increasing shortage of conventional crude oil resources, the development and utilization of unconventional oil resources is becoming more and more important, and the exploitation of heavy crude oil, especially extra-heavy crude oil, is increasing year by year. Extra-heavy crude oil has high viscosity and high freezing point, which makes it difficult to carry out pipeline transportation, which seriously limits the further development and utilization of extra-heavy crude oil. [0003] To meet the requirements of pipeline transportation, the viscosity and freezing point of super-heavy crude oil must be effectively reduced. A simple method is to add light crude oil or purchased diluent to super-heavy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G31/06
Inventor 刘自宾申海平范启明
Owner CHINA PETROLEUM & CHEM CORP