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Method for removing calcium from petroleum

A metal calcium and petroleum technology, applied in the petroleum industry, refining hydrocarbon oil, refining with heating/cooling, etc., can solve problems such as complex industrial implementation

Inactive Publication Date: 2004-02-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the disadvantage is that it is more complicated in industrial implementation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The raw material oil used in this example is heavy crude oil A, its properties are shown in 1, as can be seen from Table 1, heavy crude oil A has a high density, high viscosity, and a kinematic viscosity of 821.29mm at 100°C 2 / s, calcium content is 356ppm. Table 2 shows the conditions and results of the first step of demetallizing calcium from crude oil. Table 3 lists the visbreaking process conditions, material balance and properties of the visbroken residue. It can be seen from Table 3 that the viscosity (100°C) of heavy crude oil has dropped to 173.0mm 2 / s, the effect of reducing viscosity is obvious. The calcium content is 191ppm. Then use the visbreaking residual oil as raw material to carry out the second step of calcium demetallization process, the equipment and reagents are the same as the first step of demetallization calcium process. The results are shown in Table 4. After heavy crude oil A passes through the process of the invention, the metal calcium ...

Embodiment 2

[0025] The raw material oil used in this example is heavy crude oil B, its properties are shown in 1, as can be seen from Table 1, heavy crude oil B has a high density, high viscosity, and a kinematic viscosity of 129.57mm at 100°C 2 / s, calcium content is 1652ppm. Table 2 shows the conditions and results of the first step of demetallizing calcium from crude oil. Table 3 lists the visbreaking process conditions, material balance and properties of the visbroken residue. It can be seen from Table 3 that the viscosity (100°C) of heavy crude oil has dropped to 40.23mm 2 / s, the effect of reducing viscosity is obvious. The calcium content is 869ppm. Then use the visbreaking residual oil as raw material to carry out the second step of calcium demetallization process, the equipment and reagents are the same as the first step of demetallization calcium process. The results are shown in Table 4. After the heavy crude oil B undergoes the process of the invention, the metal calcium ...

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Abstract

A process for removing metal Ca from petroleum includes such steps as heating crude petroleum, flowing in viscosity-reducing cracking reactor, fractionating in fractional tower to obtain viscosity reduced gas, gasoline and residual oil, and making the decalsifying agent in contact with said viscosity reduced residual oil at 40-200 deg.C for 0.2-20 hr. Its advantage is high effect (more than 90%).

Description

technical field [0001] The invention relates to a method for removing metal impurities in petroleum. Background technique [0002] Various impurities are contained in heavy crude oil and heavy residual oil, among which metal calcium in heavy crude oil and heavy residual oil will cause problems such as coking of heating furnace tubes, heat exchanger blockage, catalyst poisoning and product quality decline . [0003] USP6,093,311 discloses a method for removing +2-valent metals from petroleum raw materials. The raw materials are contacted with carbon dioxide at 40-200° C. to form insoluble carbonates, and then the solids are separated. Although the calcium method can achieve the purpose of removing metallic calcium in crude oil, the removal rate of metallic calcium is not high. [0004] USP5,976,358 discloses a method for removing +2-valent metals from petroleum raw materials. The raw materials are contacted with resins including carbonic acid, sulfoni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G17/02C10G29/00C10G31/06
Inventor 李锐李本高申海平王玉章
Owner CHINA PETROLEUM & CHEM CORP