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Method and system for modifying low-grade oil

A low-quality and modified technology, applied in the processing of tar pitch/petroleum pitch/natural pitch, chemically processing tar pitch/petroleum pitch/natural pitch, petroleum industry, etc., to maintain long-term operation and reduce external rejection. Residues, the effect of high reforming efficiency

Active Publication Date: 2019-03-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the modified oil yield of the heavy residual oil processed by this method is only 75% to 85%, and the metal (Ni+V) content in the modified oil is more than 100 micrograms per gram.

Method used

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  • Method and system for modifying low-grade oil
  • Method and system for modifying low-grade oil
  • Method and system for modifying low-grade oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0035] In one embodiment, the conversion reaction is carried out in the presence or absence of a conversion catalyst, and the conversion catalyst may contain at least one selected from the group consisting of Group VB metal compounds, Group VIB metal compounds and Group VIII metal compounds. species, preferably at least one of Mo compound, W compound, Ni compound, Co compound, Fe compound, V compound and Cr compound; the conditions of the conversion reaction may include: the temperature is 380-470 ° C, preferably 400- 440°C, the hydrogen partial pressure is 10-25 MPa, preferably 13-20 MPa, and the volume space velocity of the modified raw material is 0.01-2 hours -1 , preferably 0.1-1.0 hours -1, the volume ratio of hydrogen to the modified raw material is 500-5000, preferably 800-2000, based on the metal in the conversion catalyst and based on the weight of the modified raw material, the consumption of the conversion catalyst is 10-50000 micrograms / g, preferably 30-25000 μg...

specific Embodiment approach

[0039] A specific embodiment, in step (2), the separation process includes step (2-1) and step (2-2):

[0040] (2-1) separating the conversion product obtained in step (1) at a first pressure and a first temperature to obtain a gas component and a liquid component; in step (2-1), gas products such as hydrogen are preferably separated, The gas component is rich in hydrogen, preferably with a hydrogen content of more than 85% by weight; for example, the first pressure can be 10-25 MPa, preferably 13-20 MPa. For the convenience of measurement, the first pressure generally refers to the gas group The outlet pressure when separating the separation device, the first temperature can be 380-470 ° C, preferably 400-440 ° C, for the convenience of measurement, the first temperature generally refers to the outlet temperature when the liquid component leaves the separation device; in this step The separation method can be distillation, fractional distillation and flash distillation, etc.,...

Embodiment 1-5

[0067] In a medium-sized device, the reformed raw material is first subjected to a conversion reaction, and then the conversion product is separated and treated. The separation treatment is carried out in two fractionation towers to obtain the first separated product and the second separated product. The specific details of the conversion reaction and the separated treatment Conditions and results are listed in Table 2.

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Abstract

The invention relates to a method and system for modifying low-grade oil. The method includes: (1) subjecting low-grade oil as a modifying material to conversion reaction in a conversion reactor underhydrogen contact condition to obtain a conversion product; (2) separating the conversion product of step (1) to at least obtain a first separated product; (3) extracting and separating the first separated product of step (2) in an extraction separation unit to obtain modified soil and residue; (4) returning the residue of step (3) to step (1) for conversion reaction; alternatively, spinning out the residue of step (3); alternatively, returning the residue of step (3) to step (1) for conversion reaction, and spinning out the remainder of the residue. The method and system provided herein havethe advantage that long-term operation is maintained for the system at the premise that spun-out residue is as little as possible.

Description

technical field [0001] The invention relates to a method and system for upgrading low-quality oil. Background technique [0002] In recent years, the low-quality trend of fossil fuels has intensified year by year. Moreover, the production of low-quality fuel oils such as residual oil, low-quality oil, shale oil, oil sand heavy oil, and coal-derived oil has also increased year by year. These low-quality oils are characterized by high density, high viscosity, high content of heteroatoms (sulfur, nitrogen, heavy metals) or high content of asphaltenes. In addition, the existing processing technology (such as delayed coking) developed for this kind of low-quality oil has problems such as high coke yield, low energy utilization rate, poor economic benefit, and the production process is not environmentally friendly. Therefore, the further development of high-efficiency and green upgrading technologies for such low-quality oils has become one of the development directions and rese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/04C10C3/00C10C3/02
CPCC10C3/00C10C3/02C10G67/04C10G67/0454C10G2300/205C10G2300/206
Inventor 侯焕娣董明申海平王子军龙军王玉章张书红王翠红李吉广陶梦莹许可赵飞
Owner CHINA PETROLEUM & CHEM CORP
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