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Environment-friendly crude oil decalcifying agent

A crude oil decalcifying agent, an environmentally friendly technology, applied in the treatment of hydrocarbon oil, petroleum industry, non-metallic refining, etc., can solve the problems of easy blockage of equipment pipelines by sediment, large amount of decalcifying agent, poor adaptability of crude oil, etc., to achieve Improve the chemical reaction rate, shorten the reaction time, easy to separate the effect

Active Publication Date: 2016-06-29
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chemical chelation, such as the methods disclosed in Chinese patents CN1076473, CN87105863, and CN10366981, this type of method uses aminocarboxylic acids, dicarboxylic acids, hydroxycarboxylic acids and their salts that can generate water-soluble chelates with Ca to carry out crude oil decalcification Chemical acid treatment method, such as the method disclosed in Chinese patents CN1055552, CN1454967, CN1267707, CN1521239, utilizes the principle of strong acid hydrogen ions in organic or inorganic medium strong acid and calcium petroleum acid in crude oil to be replaced by weak acid, and calcium petroleum acid is reduced to petroleum The disadvantage is that strong acid will seriously corrode the equipment, and at the same time, it has the disadvantages of large pungent odor, poor adaptability to crude oil, and large amount of decalcifying agent; chemical precipitation decalcification, such as Chinese patents CN1120575, CN1054261 , the disclosed method of CN1760338, this type of method adopts the calcium petroleum acid in water-soluble sulfate, phosphate and crude oil to react to generate slightly soluble or water-insoluble calcium sulfate, calcium phosphate precipitate, under the effect of surfactant, deposition The purpose of decalcification is achieved in the water phase. The disadvantage of this method is firstly that the phosphate decalcification agent contains phosphorus, which will cause water pollution and have a great impact on the environment. Secondly, the removal rate of calcium is not high, and the resulting sediment It is easy to block the equipment pipeline, and the industrial waste generated at the same time needs to be treated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] N 2Atmosphere, add 180g sodium allyl sulfonate and 90g itaconic acid into the reaction kettle at 25°C, mix well and heat up to 90°C, then add 140g hydroxyethyl acrylate and 100g water, mix well and add dropwise 65g of sodium persulfate aqueous solution with a concentration of 10wt.% and 40g of sodium sulfite aqueous solution with a mass percentage concentration of 10wt.%. , remove the microwave field, adjust the temperature to 75°C, continue the reaction for 4h, after cooling to room temperature, prepare 610g of polycarboxylate sodium sulfonate chelating agent, cool to 25°C, add 350g of sulfamic acid, 350g of polyacrylic acid, Mix 450g of diethylenetriamine to obtain an organic compound, then add 6175g of distilled water and mix to obtain an environment-friendly crude oil decalcifier.

[0027] After the determination of demetallization rate, the decalcification rate of the environment-friendly crude oil decalcification agent is 83.8%, and the iron removal rate is 58.4%...

Embodiment 2

[0029] Polycarboxylate sodium sulfonate chelating agent adopts the chelating agent prepared by example 1, polycarboxylate sulfonate sodium ester chelating agent 610g, sulfamic acid 350g, maleic acid / acrylic acid copolymer 260g, nitrinitrogen Mix 520g of triacetic acid to obtain an organic compound, then add 5220g of distilled water and mix to obtain an environment-friendly crude oil decalcifier.

[0030] After the determination of the demetallization rate, the decalcification rate of the environment-friendly crude oil decalcification agent is 83.2%, and the iron removal rate is 49.3%.

Embodiment 3

[0032] Polycarboxylate sodium sulfonate chelating agent adopts the chelating agent prepared by example 1, polycarboxylate sulfonate sodium ester chelating agent 610g, citric acid 150g, sulfamic acid 150g, hydrolyzed polymaleic anhydride 300g, Mix 300g of hexamethylenetetramine to obtain an organic compound, then add 3020g of distilled water and mix to obtain an environmentally friendly crude oil decalcifier.

[0033] Through the determination of demetallization rate, the decalcification rate of the environment-friendly crude oil decalcification agent is 86.9%, and the iron removal rate is 65.4%.

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Abstract

The invention discloses an environment-friendly crude oil decalcifying agent. The decalcifying agent is an uniform transparent mixture with the solid content being 20-40 wt.% formed by mixing water and an organic compound at the room temperature. The organic compound is formed by mixing 30-50 wt.% of a chelating agent, 5-20 wt. / % of organic acid, 5-20 wt.% of a dispersing agent and 10-30 wt.% of a neutralizing agent at the room temperature. The prepared environment-friendly crude oil decalcifying agent is applicable to crude oil with the middle and high calcium content, calcium in crude oil can be effectively removed, and the decalcifying agent contains no phosphate and is environmentally friendly.

Description

technical field [0001] The invention relates to an environment-friendly crude oil decalcifier, belonging to the field of petroleum processing, and is a phosphorus-free and environment-friendly crude oil decalcifier suitable for removing metal elements such as calcium and iron in medium-high calcium crude oil. Background technique [0002] At present, the development of many domestic oil fields has gradually entered the middle and late stages, and the crude oil is becoming more and more heavy, which makes the metal content in the output crude oil higher and higher. The representative metal components are calcium and iron. with Ca 2+ For example, the mass fraction of calcium ions in Liaohe heavy oil has reached 348 μg / g; foreign Sudan Fula-North-3 oil Ca 2+ The mass fraction is astonishingly 1990μg / g, which makes the decalcification of crude oil very necessary. [0003] Calcium in crude oil is divided into two categories: inorganic calcium and organic calcium. Inorganic cal...

Claims

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Application Information

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IPC IPC(8): C10G29/02C08F228/02C08F220/28C08F222/02
CPCC08F228/02C10G29/02C10G2300/205C08F220/281C08F222/02
Inventor 周钰明佘晨光马帅帅
Owner SOUTHEAST UNIV
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