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Viscosity breaking method

A technology for visbreaking and vacuum distillate oil, which is used in cracking, non-catalytic thermal cracking, petroleum industry, etc., can solve problems such as large investment and operating costs, and achieve good stability, increased yield, and reduced viscosity. Effect

Active Publication Date: 2012-07-18
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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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 carries out the visbreaking process of the present invention.

[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 mixture of the three side line distillate vacuum distillate oils is 335-598°C. The bottom of the tower...

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] The vacuum distillate mixture of the vacuum distillation tower side lines 6-1, 6-2 and 6-3 enters the visbreaking heating...

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 from the three side lines is 331-588°C. 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] The vacuum distillate oil mixture of the vacuum side lines 6-1, 6-2 and 6-3 enters the visbreaking heating furnac...

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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; 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 under the condition of the visbreaking; 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 depth can be enhanced, namely, visbreaking conversion rate is enhanced; the visbreaking residue is reduced in viscosity and excellent in stability.

Description

technical field [0001] The invention relates to a visbreaking method. Background technique [0002] Visbreaking is a process of mild thermal conversion of heavy oil, the main purpose of which 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 or heavy crude oil can also be used as raw material. 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 reaction temperature of visbreaking is us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G9/00C10G7/06
Inventor 王玉章申海平刘自宾
Owner CHINA PETROLEUM & CHEM CORP
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