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Viscosity breaking method

A technology for visbreaking and vacuum residues, applied in cracking, non-catalytic thermal cracking, petroleum industry and other directions, can solve the problems of large investment and operating costs, and achieve the effects of good stability, cost saving and low viscosity

Active Publication Date: 2012-12-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this invention requires the construction of solvent extraction and recovery devices, requiring large investment and operating costs

Method used

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  • Viscosity breaking method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The raw material for visbreaking is atmospheric residue, that is, the density at 20°C is 0.9914g / cm 3 , the kinematic viscosity at 100°C is 304.5mm 2 / s, the residual carbon is 16.6% by weight, the freezing point is 25°C, the sulfur content is 2.51% by weight, and the asphaltene content is 10.9% by weight.

[0038] according to figure 1 The scheme shown performs visbreaking.

[0039] (1) vacuum distillation

[0040] The atmospheric residue 1 is heated to 390°C in the vacuum distillation heating furnace 2, and then enters the vacuum distillation tower 4 with a top absolute pressure of 1.8kPa through the pipeline 3 for vacuum distillation, respectively on the vacuum distillation tower, The side line 6-1, side line 6-2 and side line 6-3 in the middle and lower part distill vacuum distillate oil, and the distillation range of the vacuum distillate oil mixture from the three side lines is 335-598 ° C. In the vacuum distillation tower Vacuum residue oil above 560°C is ext...

Embodiment 2

[0055] The same atmospheric residue as in Example 1 was used as the raw material for visbreaking. according to figure 1 The scheme shown performs visbreaking.

[0056] (1) vacuum distillation

[0057] The atmospheric residue 1 is heated to 420°C in the vacuum distillation heating furnace 2, and then enters the vacuum distillation tower 4 with a top absolute pressure of 5.3kPa through the pipeline 3 for vacuum distillation, respectively on the vacuum distillation tower, The side line 6-1, side line 6-2 and side line 6-3 in the middle and lower part distill vacuum distillate oil, and the distillation range of the vacuum distillate oil mixture of the three side lines is 318-567 ° C. Vacuum residue oil above 540°C is extracted from the bottom of the pump. The vacuum distillation column top line 5 goes to the vacuum system.

[0058] (2) Visbreaking

[0059] After mixing the vacuum distillates from the vacuum side lines 6-1, 6-2 and 6-3, they enter the visbreaking heating furna...

Embodiment 3

[0063] The same atmospheric residue as in Example 1 was used as the raw material for visbreaking. according to figure 1 The scheme shown performs visbreaking.

[0064] (1) vacuum distillation

[0065]The atmospheric residue 1 is heated to 410°C in the vacuum distillation heating furnace 2, and then enters the vacuum distillation tower 4 with a top absolute pressure of 3.0kPa through the pipeline 3 to carry out vacuum distillation, respectively on the vacuum distillation tower, The side line 6-1, side line 6-2 and side line 6-3 in the middle and lower part distill vacuum distillate oil, and the distillation range of the vacuum distillate oil mixture of the three side lines is 331-588 ° C. In the vacuum distillation tower Vacuum residue oil above 550°C is extracted from the bottom of the pump. The vacuum distillation column top line 5 goes to the vacuum system.

[0066] (2) Visbreaking

[0067] After mixing the vacuum distillates from the side lines 6-1, 6-2 and 6-3 of the ...

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Abstract

The invention discloses a visbreaking method, comprising the steps of: under the condition of reduced pressure distillation, distilling the visbreaking raw materials under the reduced pressure to acquire a reduced distillate oil and vacuum residue having cutting temperature not less than 540 DEG C; subjecting visbreaking the reduced distillate oil under the condition of the visbreaking, mixing the product of the reduced distillate oil experiencing the visbreaking with the vacuum residue to acquire a mixed oil; visbreaking the mixed oil at the bottom of a visbreaking fractionating tower and acquiring gas, naphtha and visbreaking residue by means of fractionation; and causing the temperature of the reduced distillate oil for the visbreaking to be higher than that of the mixed oil for the visbreaking. By applying the visbreaking method provided by the invention, visbreaking conversion rate can be enhanced; meanwhile the visbreaking residue can be reduced in viscosity and is excellent in stability.

Description

technical field [0001] The invention relates to a visbreaking method. Background technique [0002] Visbreaking is a mild thermal conversion process of heavy oil. Its main purpose is to reduce the viscosity and pour point of heavy oil, so that it can be mixed with less or no light oil to obtain qualified fuel oil, or to provide raw materials for further lightening of heavy oil. Visbreaking is still one of the important means of heavy oil processing due to its simple process, low investment and good benefits. The raw material for visbreaking is mainly vacuum residual oil, and topped crude oil, atmospheric residual oil and heavy crude oil can also be used as raw materials. The visbreaking products are mainly visbreaking gas, naphtha and residual oil, and the visbreaking residual oil can be further distilled under reduced pressure to obtain visbreaking vacuum distillate oil and visbreaking vacuum residual oil. [0003] The visbreaking reaction temperature is usually between 3...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G9/00
Inventor 王玉章申海平刘自宾
Owner CHINA PETROLEUM & CHEM CORP
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