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A composite phosphorus-free crude oil metal chelating agent

A metal chelating agent, composite technology, applied in the treatment of hydrocarbon oil, refined hydrocarbon oil, petroleum industry, etc., can solve the problems of low removal efficiency of the precipitation method, corrosion of equipment pipelines, blockage of equipment pipelines, etc. The effect of energy consumption, corrosion prevention, and esterification rate improvement

Active Publication Date: 2017-06-20
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many problems in the metal removal method adopted above, such as high cost and high price; too strong acidity of the metal removal agent will cause corrosion of equipment pipelines, the requirements for existing equipment are too high, and it will also cause a certain degree of pollution to the environment. pollution; the removal efficiency of the precipitation method is not high, and if the generated sediment is not removed in time, it will also cause the blockage of the equipment pipeline
In summary, the existing metal removal agents are difficult to meet the needs of the crude oil refining industry today. Therefore, the development of a new type of phosphorus-free crude oil metal chelating agent is of great significance to the economic and social benefits of the crude oil refining industry.

Method used

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  • A composite phosphorus-free crude oil metal chelating agent
  • A composite phosphorus-free crude oil metal chelating agent
  • A composite phosphorus-free crude oil metal chelating agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Add 10 g of α-aminobutyric acid and 30 g of water into the reaction kettle at 25°C under a nitrogen atmosphere, then adjust the pH with 6 wt% sulfuric acid aqueous solution until the α-aminobutyric acid is completely dissolved, Add 80g of polyethylene glycol monomethyl ether, raise the temperature to 80°C, irradiate with microwave for 10min, and the microwave power is 500W. After the temperature was lowered to 65°C, 1.2g of mercaptoacetic acid, 0.4g of mercaptopropanol and 150g of water were added to the reaction kettle, and the acid ester mixture and 40g of the composite initiator solution were added dropwise at a constant speed, and the dripping was completed within 2.5h. After dripping, adjust the temperature to 80°C to continue the reaction for 3 hours. The ester mixture is formed by mixing 20g of 4-hydroxy-2-butenoic acid, 30g of allyl acetate and 20g of water. The composite initiator solution has a concentration of It is a 2wt% aqueous solution, and aft...

Embodiment 2

[0025] Example 2: Add 15g of α-aminobutyric acid and 50g of water into the reactor at 20°C under a nitrogen atmosphere, then adjust the pH with 8wt% sulfuric acid aqueous solution until the α-aminobutyric acid is completely dissolved, Add 120g of polyethylene glycol monomethyl ether, raise the temperature to 85°C, and irradiate with microwave for 15min with a microwave power of 600W. After lowering the temperature to 60°C, add 2.0g of mercaptopropionic acid, 1.6g of mercaptopropanol and 180g of water into the reaction kettle, add the acid ester mixture and 100g of the composite initiator solution dropwise at a uniform speed, and finish dropping within 2.0h After the drop, the temperature was raised to 75°C to continue the reaction for 3h. The ester mixture was mixed with 35g of 4-hydroxy-2-butenoic acid, 40g of allyl acetoacetate and 18g of water. The composite initiator solution It is an aqueous solution with a concentration of 1.8wt%, and after cooling down to room temperatu...

Embodiment 3

[0027] Example 3: Add 10 g of α-aminobutyrylic acid and 30 g of water into the reaction kettle at 30°C under a nitrogen atmosphere, and then adjust the pH with 3 wt% aqueous sulfuric acid until the α-aminobutyric acid amine is completely dissolved , add 100g of polyethylene glycol monomethyl ether, raise the temperature to 80°C, irradiate with microwave for 15min, the microwave power is 800W, after the temperature is lowered to 65°C, add 2.1g of mercaptopropanol and 180g of water into the reaction kettle, respectively Add the ester mixture and 80g of compound initiator solution dropwise at a constant speed, and finish dropping within 3.5 hours. After dropping, raise the temperature to 80°C and continue the reaction for 6 hours. The acid value mixture is composed of 25g of 4-hydroxy-2-butenoic acid , 45g of methallyl diacetate and 22g of water are mixed, and the composite initiator solution is an aqueous solution with a concentration of 2.5wt%. After being cooled to room tempera...

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Abstract

The invention relates to a composite phosphorus-free crude oil metal chelating agent which is stable in performance, efficient and environmentally friendly. The metal chelating agent is prepared by uniformly compositing 30-40 wt% of a terpolymer, 5-20 wt% of a dicarboxylic acid, 20-30 wt% of a sodium alkyl sulfonate copolymer, 10-20 wt% of an amphiprotic ionic type crude oil demulsifying agent and 10-15 wt% of water at room temperature in a reactor, and performing microwave irradiation. The terpolymer used in the compositing step is prepared by subjecting an alpha-aminocrotonic acid end-capped polyether reactive monomer, 4-hydroxycrotonic acid and vinyl-containing unsaturated carboxylic ester to free radical copolymerization. The general structure formula of the terpolymer is shown in the specification, wherein A is a repeat unit formed after copolymerization of the vinyl-containing unsaturated carboxylic ester, the degree x of polymerization is 2-500, y is 2-500, z is 2-500, and the number m of the repeat units is 3-80. The metal chelating agent has excellent metal chelating performance, and can remove 90% or above of calcium and 45% or above of iron from crude oil.

Description

technical field [0001] The invention relates to a composite non-phosphorous crude oil metal chelating agent, which belongs to the advanced crude oil pretreatment technology in the technical field of crude oil refining. Background technique [0002] At present, due to the deep exploitation of crude oil, the quality of crude oil has seriously declined, the degree of heavy and poor quality of crude oil has deepened, and the metal content in crude oil has become higher and higher. It is generally believed that the metals in crude oil mainly include calcium, iron, magnesium, nickel, vanadium, and sodium, among which calcium, iron, and magnesium mainly exist in the form of petroleum salts, and nickel and vanadium exist in the form of porphyrin compounds. host. The existence of these metal compounds has serious hazards to the subsequent processing of crude oil, which is mainly reflected in: (1) metal compounds will deposit on the surface of the catalyst and block the pores of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G29/20C10G33/04C08F290/06C08F218/12
CPCC08F290/062C10G29/20C10G33/04C10G2300/205C08F218/12
Inventor 梁爽吴文婷蔡志岚李世伟杨海涌孟闻飞卢莹炜谈梦璐周天悦周钰明姚清照黄镜怡孙伟
Owner SOUTHEAST UNIV
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