Method for reducing calcium content in atmospheric pressure residual oil and method for processing atmospheric pressure residual oil

A technology of atmospheric residual oil and calcium content, which is applied in hydrotreating process, multi-stage series-connected refining process treatment, petroleum industry, etc. The effect of short cycle, low cost and high reaction temperature

Inactive Publication Date: 2016-05-11
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 some refineries that the calcium content in residual oil is still high after using a large amount of decalcifying agents. The decrease in calcium content in the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] This example is used to illustrate the method for reducing the calcium content in the atmospheric residue and the processing method for the atmospheric residue of the present invention.

[0071] The properties of atmospheric residue with high calcium content are shown in Table 1 below.

[0072] (1) Solvent deasphalting treatment of atmospheric residual oil with high calcium content: n-heptane is selected as the solvent, the extraction temperature is 230°C, the operating pressure is 3MPa, and the volume ratio of solvent to atmospheric residual oil feed is 8:1. After extraction, the yield of DAO relative to the atmospheric residue raw material is 93.3% by weight, the content of n-heptane insolubles in DAO is 0.2% by weight, the density is 0.945g / mL, the calcium content is 26μg / g, and the nickel content is 24.1μg / g, the vanadium content is 9.8μg / g.

[0073] (2) Carry out decalcification treatment to DAO: the dosage of decalcification agent is 150 μ g / g; With respect to t...

Embodiment 2

[0094] This example is used to illustrate the method for reducing the calcium content in the atmospheric residue and the processing method for the atmospheric residue of the present invention.

[0095] The atmospheric residual oil with high calcium content used as the feedstock oil in this embodiment is the same as that in Embodiment 1.

[0096] (1) Solvent deasphalting treatment of atmospheric residual oil with high calcium content: the solvent is n-heptane, the extraction temperature is 240°C, the operating pressure is 5MPa, and the volume ratio of solvent to atmospheric residual oil feed is 10:1. After extraction, the yield of DAO relative to the atmospheric residue raw material is 89.5% by weight, the content of n-heptane insolubles in DAO is 0.08% by weight, the density is 0.937g / mL, the calcium content is 21.0μg / g, and the nickel content is 22.1 μg / g, the vanadium content is 6.8μg / g.

[0097] (2) Carry out decalcification treatment to DAO: the dosage of decalcification ...

Embodiment 3

[0103] This example is used to illustrate the method for reducing the calcium content in the atmospheric residue and the processing method for the atmospheric residue of the present invention.

[0104] The atmospheric residual oil with high calcium content selected as the feedstock oil in this embodiment is the same as that in Embodiment 1.

[0105] (1) Performing solvent deasphalting treatment on atmospheric residue with high calcium content: various conditions of solvent deasphalting treatment are the same as those in Example 1. DAO properties are the same as in Example 1.

[0106] (2) Carry out decalcification treatment to DAO: the dosage of decalcification agent is 300 μ g / g; With respect to the DAO of every kg, the addition amount of described demulsifier is 50 mg, and the consumption of described water is 100 g; The emulsion, water and the DAO obtained in step (1) are fully mixed, and acted on at 90° C. under an electric field of 250 V / cm for 4 hours, and then the decal...

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Abstract

The present invention discloses a method for reducing calcium content in atmospheric pressure residual oil, the method comprises the following steps: first, using a solvent for deasphalting processing of the atmospheric pressure residual oil to obtain deasphalted oil, wherein the content of n-heptane-insoluble matters in the obtained deasphalted oil is not more than 0.3% by weight by controlling of conditions of the solvent deasphalting processing; and then under aqueous solution conditions, contacting a demulsifier and a decalcifying agent with the obtained deasphalted oil for oil-water separation. The present invention also discloses a method for processing the atmospheric pressure residual oil, and the method comprises contacting of an oil phase material obtained by the method for reducing the calcium content in the atmospheric pressure residual oil with a hydrogenation catalyst. According to the method, under the premise of using of a relatively small amount of the decalcifying agent, the calcium content in high calcium content atmospheric pressure residual oil can be efficiently and cost-effectively reduced.

Description

technical field [0001] The invention relates to a method for reducing calcium content in atmospheric residue oil and a processing method for atmospheric residue oil. Background technique [0002] With the increasing preciousness of petroleum resources, people pay more and more attention to the efficient utilization of heavy oil, and the hydrogenation process of residual oil is a process with high liquid product yield, which has been widely used. According to the type of reactor, the residual oil hydrogenation process can be divided into fixed bed process, ebullated bed process, suspended bed (also known as slurry bed) process and moving bed process, among which the fixed bed residual oil hydrotreating technology is mature and easy to operate. Simple and widely used. [0003] However, the fixed-bed residual oil hydrotreating process also has its limitations, such as the catalyst cannot be replaced online. Moreover, there are certain restrictions on the properties of the pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G53/02C10G69/02
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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