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Method for improving asphalt-removing oil output and decreasing solvent accounting simultaneously

A solvent dosage and deasphalting technology, which is applied in the direction of selective extraction and processing of tar pitch/petroleum pitch/natural pitch, tar processing through selective solvent extraction, etc., can solve the problems of good washing effect and deasphalting method, and achieve good washing effect , high yield and less solvent consumption

Inactive Publication Date: 2007-04-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore, there is no deasphalting method with less solvent consumption and good washing effect.

Method used

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  • Method for improving asphalt-removing oil output and decreasing solvent accounting simultaneously
  • Method for improving asphalt-removing oil output and decreasing solvent accounting simultaneously

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The experiment was carried out in a medium-sized device with a processing capacity of 10kg per hour. The operating conditions of the deasphalting extraction tower were: the temperature at the top of the extraction tower was 75°C, the temperature at the bottom of the tower was 55°C, the solvent ratio was 4:1, and the solvent entered the extraction tower The location is the same as the usual industrial installation, above the interface between the asphalt solution layer and the deasphalted oil solution layer.

Embodiment 2

[0032] The experimental conditions are the same as in Example 1, but the solvent enters the extraction tower in two places, one above the interface between the bituminous solution layer and the deasphalted oil solution layer, and the solvent ratio is 3.5: 1, and one is between the bituminous solution layer and the deasphalted oil solution layer. Below the interface of the deasphalted oil solution layer, the solvent ratio was 0.5:1.

Embodiment 3

[0034] The operating conditions of the deasphalting extraction tower are the same as in Example 1, but the asphalt solution discharged from the bottom of the tower is mixed with a fresh solvent with a solvent ratio of 4:1 and enters an ad hoc settler for sedimentation, and is used for deasphalting extraction. The solvent of the tower is the oily solvent after washing the asphalt solution.

[0035] The experimental result of embodiment 1,2,3 is shown in table 3, as can be seen from the result of table 3, adopts the method of the present invention, although used solvent amount is much less than usual two-stage deasphalting, and is identical with one-stage deasphalting, but However, the yield of deasphalted oil was significantly improved.

[0036] deasphalted oil

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Abstract

Removal of asphalt for decreasing solvent account and improving oil recovery is carried out by entering raw material and oily solvent into extracting tower, countercurrent contacting to obtain deasphaltizing solution and asphalt solution, separating deasphaltizing solution to deasphaltizing oil and solvent, washing for asphalt solution by recovered solvent, entering oily solvent into extracting tower, separating asphalt solution containing solvent to asphalt and solvent, and washing asphalt solution containing solvent. It has less solvent and better washing effect.

Description

technical field [0001] This invention relates to the selective solvent extraction of refined hydrocarbon oils in the absence of hydrogen, and more particularly to a solvent deasphalting process. Background technique [0002] Solvent deasphalting can selectively remove harmful substances such as asphaltenes and metal compounds in residual oil, and provide a large amount of clean and easy-to-process deasphalted oil for subsequent processes such as catalytic cracking, hydrocracking, and lubricating oil production. Its by-product asphalt is a good raw material for producing asphalt products or gas production, so solvent deasphalting has been widely valued in the deep processing of residual oil, and it is one of the important means of deep processing of residual oil. [0003] At a certain temperature, light hydrocarbon solvents such as propane and butane have a strong ability to dissolve the oil in the residual oil, but have a weak or basically insoluble ...

Claims

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Application Information

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IPC IPC(8): C10C1/18C10C3/08
Inventor 祖德光王子军龙军
Owner CHINA PETROLEUM & CHEM CORP