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Method for reducing calcium content of vacuum residue and processing method of vacuum residue

A technology for vacuum residual oil and calcium content, which is applied in hydrotreating process, multi-stage series refining process treatment, petroleum industry, etc. It can solve the problems of increased cost and insignificant decrease in calcium content of residual oil, etc., and achieves operation The effect of short cycle, low cost and high reaction temperature

Inactive Publication Date: 2016-04-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the extensive use of additives such as decalcifying agents has led to increased costs, and it has been found in the production practice of some refineries that even if a large amount of decalcifying agents are used, the calcium content in the residual oil is still high, and the concentration of decalcifying agents continues to increase. The calcium content in residual oil does not decrease significantly when the injection volume is increased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] This example is used to illustrate the method for reducing the calcium content in the vacuum residue and the processing method for the vacuum residue of the present invention.

[0082] The properties of vacuum residue with high calcium content are shown in Table 1 below.

[0083] (1) Solvent deasphalting treatment of vacuum residue with high calcium content: the solvent is n-heptane, the extraction temperature is 230°C, the operating pressure is 3MPa, and the volume ratio of solvent to vacuum residue is 8:1. After extraction, the yield of DAVR relative to the vacuum residue raw material is 89.3% by weight, the content of n-heptane insolubles in DAVR is 0.25% by weight, the density is 0.975g / mL, the calcium content is 48μg / g, and the nickel content is 34.6μg / g, the vanadium content is 18.8μg / g.

[0084] (2) Decalcification of heavy oil: fully mix the DAVR obtained in step (1) with catalytic cracking heavy diesel oil, catalytic cracking cycle oil, catalytic cracking oil...

Embodiment 2

[0113] This example is used to illustrate the method for reducing the calcium content in the vacuum residue and the processing method for the vacuum residue of the present invention.

[0114] The vacuum residue with high calcium content used as raw material oil in this embodiment is the same as that in Embodiment 1.

[0115] (1) Solvent deasphalting treatment of vacuum residue with high calcium content: the solvent is n-heptane, the extraction temperature is 250°C, the operating pressure is 3MPa, and the volume ratio of solvent to vacuum residue is 10:1. After extraction, the yield of DAVR relative to the vacuum residue raw material is 85.5% by weight, the content of n-heptane insolubles in DAVR is 0.12% by weight, the density is 0.969g / mL, the calcium content is 41μg / g, and the nickel content is 28.2μg / g, the vanadium content is 13.8μg / g.

[0116] (2) Decalcification of heavy oil: fully mix the DAVR obtained in step (1) with catalytic cracking heavy diesel oil, catalytic cr...

Embodiment 3

[0121] This example is used to illustrate the method for reducing the calcium content in the vacuum residue and the processing method for the vacuum residue of the present invention.

[0122] The vacuum residue with high calcium content used as the feedstock oil in this example is the same as that in Example 1.

[0123] (1) Solvent deasphalting treatment of vacuum residue with high calcium content: the type of solvent, operating conditions and methods are the same as those in Example 1. DAVR properties are the same as in Example 1.

[0124] (2) Decalcification of heavy oil: fully mix the DAVR obtained in step (1) with catalytic cracking heavy diesel oil, catalytic cracking cycle oil and second-line wax oil to obtain heavy oil, and DAVR, catalytic cracking heavy diesel oil, and catalytic cracking cycle The weight ratio of oil and second-line wax oil is 65:18:9:8, and the density of heavy oil after mixing is 0.94g / mL.

[0125] Decalcifying agent, demulsifier kind and consumpti...

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PUM

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Abstract

The invention discloses a method for reducing the calcium content of vacuum residue and a method using the same to process vacuum residue. The method for reducing the calcium content of vacuum residue comprises the following steps: (1) subjecting vacuum residue to a solvent deasphalting treatment to obtain deasphalted vacuum residue, wherein the conditions of the solvent deasphalting treatment are strictly controlled to make the content of n-heptane insoluble substance in deasphalted vacuum residue be less than 0.3 wt%; (2) in a water solution, contacting a decalcifying agent, a de-emulsifier, and hydrocarbon oil with deasphalted vacuum residue obtained in the step (1), and carrying out oil-water separation. According to the provided method, only a little amount of decalcifying agent is used, the calcium content of vacuum residue with a high calcium content can be reduced efficiently, and moreover, the provided method has the advantages of simple operation and low cost.

Description

technical field [0001] The invention relates to a method for reducing calcium content in vacuum residue oil and a processing method for vacuum residue oil. Background technique [0002] As petroleum resources become more and more precious, people pay more and more attention to the efficient utilization of heavy oil. Fixed-bed residual oil hydrotreating technology has been widely used due to its high yield of liquid products, mature process and simple operation. [0003] However, the fixed-bed residue hydrotreating process also has its limitations. It cannot directly process high-viscosity, high-metal-content vacuum residue, and it also has certain restrictions on the properties of the processed raw oil. For example, due to the large molecular weight of asphaltene, the unremoved asphaltenes contained in heavy oil are difficult to undergo hydrogenation conversion and are prone to dehydrogenation and condensation reactions, which will lead to the deactivation of catalyst carbon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G53/02C10G69/04
Inventor 董凯刘涛邵志才邓中活施瑢戴立顺牛传峰胡大为孙淑玲杨清河
Owner CHINA PETROLEUM & CHEM CORP
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