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Method for removing metal from hydrocarbon oil using acrylic acid - acrylic ester copolymers

A technology of hydroxypropyl acrylate and acrylate, which is used in the refining of hydrocarbon oil, petroleum industry, etc., can solve the problems of large dosage and inability to remove calcium, and achieve the effect of small dosage and high removal efficiency.

Inactive Publication Date: 2004-08-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because polyphosphoric acid or its salts are easily hydrolyzed to produce orthophosphoric acid or its salts in terms of chemical properties, and the dosage is relatively large, calcium cannot be effectively removed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] This example uses acrylic acid-hydroxypropyl acrylate copolymer to demetallize calcium and iron.

[0017] The raw material oil used in the experiment was heavy oil in the ninth area of ​​Karamay (calcium content 266ppm), the mixed oil of heavy oil in the ninth area of ​​Karamay and kerosene with a ratio of 7:3 (calcium content 154ppm), the reduction of the mixed oil of crude oil in northern Xinjiang and crude oil in southern Xinjiang. Mixed oil of pressed residual oil and kerosene (calcium content 87.1ppm). The used acrylic acid-hydroxypropyl acrylate copolymer is commercially available (molecular weight 1000-50000, monomer ratio 11:1-1:2, produced by Water Quality Stabilizer Factory of Nanjing Institute of Chemical Technology).

[0018] The metal removal agent, water injection, and demulsifier are formulated into an aqueous solution according to a certain agent / calcium mass ratio and water injection rate, and the amount of demulsifier added is 50ppm. Fully mix the pre...

Embodiment 2

[0022] This embodiment uses acrylic acid-methyl acrylate copolymer (molecular weight 3000~20000, monomer ratio 4:1~5:1), acrylic acid-hydroxyethyl acrylate copolymer (molecular weight 3000~5000, monomer ratio 4:1~ 6:1) to remove metal calcium and iron in crude oil.

[0023] The test method is the same as that in Example 1. The crude oil used is a mixture of heavy oil and kerosene in the 9th district of Karamay, Xinjiang at a ratio of 7:3, wherein the calcium content is 154 ppm, and the iron content is 17.1 ppm. The results are shown in Table 2.

[0024] As can be seen from the results in Table 2, when the agent / calcium ratio is 1.5-2, both acrylic acid-methyl acrylate and acrylic acid-hydroxyethyl acrylate copolymers have good decalcification effects.

Embodiment 3

[0026] This embodiment uses acrylic acid-hydroxypropyl acrylate-methyl acrylate terpolymer to remove calcium in crude oil

[0027] The oil used in the test is the mixture of Lanlian vacuum residue and kerosene in a ratio of 4:1 (calcium content 87.1ppm, iron content 9.3), acrylic acid-hydroxypropyl acrylate-methyl acrylate terpolymer is the water treatment agent of Nacol Company of the United States NC-309 commodity, test method is the same with embodiment 1. The test results are shown in Table 3.

[0028] From the results in Table 3, it can be seen that the acrylic acid-hydroxypropyl acrylate-methyl acrylate terpolymer also has a good demetallization effect.

[0029] polymer type

[0030] demulsifier

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PUM

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Abstract

The process of eliminating metal from hydrocarbon oil with acrylic acid-acrylate copolymer includes mixing the acrylic acid-acrylate copolymer with water injecting demulsifier and raw oil at 30-200 deg.c to make metal in hydrocarbon oil generate water soluble compound dissolved in water, and oil-water separation to eliminate metal from hydrocarbon oil. The acrylic acid-acrylate copolymer has molecular weight of 1000-50000, and molar ratio between acrylic acid structure units and acrylate structure units of 0.1-20. The copolymer consumption is 0.5-5 times, preferably 1.0-3.0 times, the total calcium weight in hydrocarbon oil. The process has the features of less copolymer consumption and high elimination efficiency, and may be used for hydrocarbon oil in excessive calcium content.

Description

technical field [0001] The present invention relates to a method for removing metals from hydrocarbon oils by using acrylic acid-acrylate copolymers. technical background [0002] In recent years, with the development of oil extraction technology, many heavy crude oils have been extracted. The content of metals in these crude oils, especially some alkaline earth metals such as Ca and Mg, has greatly increased, and people have paid more and more attention to their influence on crude oil processing. Studies have shown that the increase of Ca content in raw oil will significantly reduce the molecular sieve and matrix area of ​​the catalyst, which will directly affect the activity of the catalyst. In recent years, some refineries refining high-Ca crude oil have been poisoned and deactivated by catalytic cracking agents, which not only greatly reduces the yield of light oil, but also affects the quality of downstream residual oil, resulting in a significant reduction in the refi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G29/22
Inventor 徐振洪谭丽于丽李本高
Owner CHINA PETROLEUM & CHEM CORP
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