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A kind of highly functional amphiphilic copolymer crude oil metal chelating agent and preparation method thereof

A metal chelating agent, high-functionality technology, used in the treatment of hydrocarbon oil, refined hydrocarbon oil, petroleum industry, etc. The process is green and environmentally friendly, the metal removal effect is improved, and the water solubility is good.

Active Publication Date: 2018-07-20
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic acids have a strong corrosive effect on equipment and are gradually being replaced; organic carboxylic acid demetallizers have a better effect on the removal of calcium and iron, but the removal rate of nickel and vanadium is very low; The removal effect of various metals is good, but it is easy to cause eutrophication of water body, which does not meet the requirements of environmental protection
Chinese patents CN87105863A and CN1657594A use hydroxycarboxylic acid, monocarboxylic acid, dicarboxylic acid and amino acid as chelating agents, which have a certain decalcification effect, but contain a single functional group and have poor removal effect on nickel and vanadium; Chinese patents CN102816586A and CN102443422 B The published chelation removal method uses phosphorus-containing compounds such as phosphoric acid, trimethyl phosphate, and dimethyl phosphite as chelating agents, and has a good removal effect on nickel and vanadium, but the removal agent contains phosphorus, which does not meet environmental protection requirements

Method used

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  • A kind of highly functional amphiphilic copolymer crude oil metal chelating agent and preparation method thereof
  • A kind of highly functional amphiphilic copolymer crude oil metal chelating agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: At room temperature, add 5g of carboxymethyl chitosan, 150g of deionized water, and 15g of N-isopropylacrylamide into the reaction kettle, dissolve evenly and pass nitrogen gas, and at 80°C under a nitrogen atmosphere, first Carry out microwave irradiation for 20 minutes, the power of microwave is 500W, after microwave irradiation, after adding 0.5g azobisisopropylimidazoline and 0.18g mercaptopropanol in the reaction kettle, dropwise add 250g mass fraction to be 10wt. % propylene sulfonic acid aqueous solution, dripped in 180 minutes, then reacted in microwave for 30 minutes after dripping, microwave power 400W. Cool down to room temperature after the reaction to obtain a light yellow transparent high-functionality amphiphilic copolymer crude oil metal chelating agent.

[0017] Take Oman Basra blended crude oil as test oil, its calcium content is 25.3ppm, iron content is 11.2ppm, nickel content is 16.7ppm, vanadium content is 69.3ppm, when the dosage of the ...

Embodiment 2

[0018] Example 2: At room temperature, add 10g of carboxymethyl chitosan, 100g of deionized water, and 6g of N-isopropylacrylamide into the reaction kettle, dissolve evenly, and pass nitrogen gas. At 90°C, under nitrogen atmosphere, first Carry out microwave irradiation for 5 minutes, the power of microwave is 90W, after microwave irradiation, add 0.1g azobiscyanovaleric acid and 0.5g mercaptopropionic acid to the reaction kettle, dropwise add 240g mass fraction to be 25wt.% The aqueous solution of methacrylic sulfonic acid was dripped in 60 minutes, and then microwaved for 10 minutes after the dripping, and the microwave power was 100W. Cool down to room temperature after the reaction to obtain a light yellow transparent high-functionality amphiphilic copolymer crude oil metal chelating agent.

[0019] Take Oman Basra mixed crude oil as test oil, its calcium content is 25.8ppm, iron content is 11.0ppm, nickel content is 16.7ppm, vanadium content is 69.6ppm, when the dosage of...

Embodiment 3

[0020] Example 3: At room temperature, add 24g of carboxymethyl chitosan, 300g of deionized water, and 60g of N-isopropylacrylamide into the reaction kettle, dissolve evenly and pass nitrogen gas, and at 70°C under nitrogen atmosphere, first Carry out microwave irradiation for 15 minutes, the power of microwave is 200W, after microwave irradiation, after adding 0.48g azobisisopropylimidazoline and 0.24g mercaptopropionic acid in the reaction kettle, dropwise add 120g mass fraction to be 20wt. % propylene sulfonic acid aqueous solution, dripped in 120 minutes, then reacted in microwave for 25 minutes after dripping, microwave power 600W. Cool down to room temperature after the reaction to obtain a light yellow transparent high-functionality amphiphilic copolymer crude oil metal chelating agent.

[0021] Take Oman Basra blended crude oil as test oil, its calcium content is 24.4ppm, iron content is 14.6ppm, nickel content is 17.1ppm, vanadium content is 64.3ppm, when the dosage o...

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Abstract

The invention relates to a high-functionality-degree amphiphilic copolymer metal chelating agent for crude oil and a preparing method thereof. The metal chelating agent has good removing effects on calcium, iron, nickel, vanadium, and other metals in crude oil, and is prepared by subjecting carboxymethyl chitosan, N-isopropylacrylamide and an allyl sulfonic acid type monomer to graft copolymerization. The general structure formula of the metal chelating agent is shown in the specification, wherein R is -H or -CH3, the number m of repeat units is 100-1000, the polymerization degree x is 2-500, and the polymerization degree y is 2-500. According to the metal chelating agent, through molecule designing and structure control of polymerization monomers and the copolymer, a green synthetic process in which graft copolymerization is initiated by microwave assistance is adopted, integration and synergistic effects of a plurality of functional groups such as amino, acylamino, carboxyl, hydroxy, a sulfonic acid group, an ether group and isopropyl are achieved, and the functionality degree and hydrophilic-lipophilic amphipathicity of the metal chelating agent are effectively improved. The calcium removing rate for crude oil is 80% or above, the iron removing rate is 75% or above, the nickel removing rate is 30% or above, and the vanadium removing rate is 35% or above.

Description

technical field [0001] The invention relates to a high-functionality amphiphilic copolymer crude oil metal chelating agent and a preparation method thereof, which are suitable for removing calcium, iron, nickel, vanadium and other metals in crude oil. Background technique [0002] In recent years, with the continuous growth of global oil consumption and the depletion of conventional crude oil resources, people began to focus on unconventional crude oil that is difficult to process but has relatively large reserves. However, the metal content in unconventional crude oil is high. These metals are mainly calcium, iron, nickel, and vanadium. They will damage the catalysts in the catalytic cracking and catalytic hydrogenation processes in the petroleum refining process, and have serious harmful effects. Calcium and iron in crude oil mainly exist in the form of naphthenate and phenoxide; while nickel and vanadium mainly exist in the structure of porphyrin compounds, and their stru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00
CPCC08F251/00C10G29/20C10G2300/205C08F220/54C08F228/02
Inventor 梁爽吴文婷李世伟蔡志岚杨海涌谈梦璐孟闻飞卢莹炜周天悦周钰明姚清照黄镜怡孙伟
Owner SOUTHEAST UNIV
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