阅读说明：本技术 汽柴油加氢装置专用防腐蚀剂及其制备方法 (Special anticorrosive agent for gasoline and diesel hydrogenation device and preparation method thereof ) 是由 顾法明 李正中 吴旭忠 匡文荣 于 2019-11-07 设计创作，主要内容包括：本发明公开了汽柴油加氢装置专用防腐蚀剂,包括以下质量百分比的组分：15～30%的间二氮杂环戊烯或其衍生物,20～35%的有机化合物,20～30%的有机溶剂,10～15%的醇类化合物和20～35%脱盐水。本发明属于成膜缓蚀剂和中和缓蚀剂组成的复合型缓蚀剂,缓释率由原来同类缓蚀剂的90%左右提升到95%以上,能有效解决加氢精制、加氢裂化装置高压空冷器及下游设备和管线设备腐蚀问题。(The invention discloses a special anticorrosive agent for a gasoline and diesel hydrogenation device, which comprises the following components in percentage by mass: 15-30% of m-diazacyclopentene or a derivative thereof, 20-35% of an organic compound, 20-30% of an organic solvent, 10-15% of an alcohol compound and 20-35% of desalted water. The invention belongs to a composite corrosion inhibitor composed of a film forming corrosion inhibitor and a neutralization corrosion inhibitor, the slow release rate is improved to more than 95 percent from about 90 percent of the original similar corrosion inhibitor, and the corrosion problem of a high-pressure air cooler, downstream equipment and pipeline equipment of a hydrofining and hydrocracking device can be effectively solved.)

1. The special anticorrosive agent for the gasoline and diesel hydrogenation device is characterized by comprising the following components in percentage by mass: 15-30% of m-diazacyclopentene or a derivative thereof, 20-35% of an organic compound, 20-30% of an organic solvent, 10-15% of an alcohol compound and 20-35% of desalted water.

2. The special anticorrosive agent for gasoline and diesel hydrogenation units of claim 1, wherein the m-diazacyclopentene or a derivative thereof is imidazoline; the multifunctional surfactant is a multifunctional surfactant with excellent performance, and mainly has an anti-corrosion effect because nitrogen atoms on an imidazoline ring in a molecular structure of the multifunctional surfactant and a metal surface can generate a coordination chain to form a hydrophobic layer to prevent a corrosive medium from entering the metal surface to form a protective film.

3. The special anticorrosive agent for gasoline and diesel hydrogenation units of claim 1, wherein the organic compound is ethylenediamine; the corrosion inhibitor is good alkali and a reducing agent, can form a complex with metal ions, the coverage area of metal is increased by increasing the carbon chain of hydroxyl in amine molecules, and the corrosion inhibition effect is improved by adsorbing polar groups on the surface of the metal.

4. The special anticorrosive agent for gasoline and diesel hydrogenation equipment according to claim 1, wherein the organic solvent is monoethanolamine.

5. The special anticorrosive agent for gasoline and diesel hydrogenation units according to claim 1, wherein the alcohol compound is diethylene glycol and methanol mixed according to a mass ratio of 1-2.5: 1; the method forms metal hydroxide on the surface of the solution and the metal, the molecules and the hydroxide further produce polymer, and a stable protective film is formed on the surface of the metal.

6. The method for preparing the special anticorrosive agent for the gasoline and diesel hydrogenation unit is characterized by comprising the steps of measuring raw materials according to a formula, sequentially adding an organic compound, an organic solvent and desalted water into a reaction kettle, stirring and mixing for 30 minutes at normal temperature, adding m-diazacyclopentene or derivatives thereof under the stirring condition, heating to 60 ℃, preserving heat for 1-1.5 hours, adding an alcohol compound, continuously stirring for 0.5-1 hour, discharging and filtering to obtain a product.

Technical Field

The invention belongs to the field of petrochemical industry, and particularly relates to a special anticorrosive agent for a gasoline and diesel hydrogenation device and a preparation method thereof.

Background

Along with the long-term mass exploitation of oil fields, the properties of crude oil are gradually deteriorated, corrosive substances such as hydrogen sulfide, sulfuric acid, hydrochloric acid, ammonia, cyanide and the like are generated by impurities such as sulfur, chlorine, oxygen, nitrogen and the like in the crude oil due to heating and the like, the development of a hydrogenation device and the deterioration of a hydrogenation raw material are also serious, the corrosion of reaction effluent air cooler system equipment and pipelines of the hydrogenation device is also serious, and the serious influence is caused on the safety, stability and long-period operation of the device. The equipment corrosion becomes serious gradually in the hydrofining and hydrogenation deterioration processes, and when the corrosion is serious, equipment perforation can be caused, so that the safety operation of the equipment is damaged, and even emergency shutdown can be caused.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to provide a special anticorrosive agent for a gasoline and diesel hydrogenation device aiming at the defects of the prior art.

The invention also aims to provide a preparation method of the special anticorrosive agent for the gasoline and diesel hydrogenation device.

The technical scheme is as follows: in order to achieve the above object, the present invention is specifically realized as follows: the special anticorrosive agent for the gasoline and diesel hydrogenation device comprises the following components in percentage by mass: 15-30% of m-diazacyclopentene or a derivative thereof, 20-35% of organic amine, 20-30% of an organic solvent, 10-15% of an alcohol compound and 20-35% of desalted water.

Wherein the m-diazacyclopentene or a derivative thereof is imidazoline.

Wherein the organic compound is ethylenediamine.

Wherein the organic solvent is monoethanolamine.

Wherein the alcohol compound is formed by mixing diethylene glycol and methanol according to the mass ratio of 1-2.5: 1.

The preparation method of the special anticorrosive agent for the gasoline and diesel hydrogenation device comprises the steps of measuring raw materials according to a formula, sequentially adding an organic compound, an organic solvent and desalted water into a reaction kettle, stirring and mixing for 30 minutes at normal temperature, adding m-diazacyclopentene or derivatives thereof under the stirring condition, heating to 60 ℃, keeping the temperature for 1-1.5 hours, adding an alcohol compound, continuously stirring for 0.5-1 hour, discharging and filtering to obtain the product.

Has the advantages that: compared with the prior art, the invention has the following advantages:

(1) the invention belongs to a composite corrosion inhibitor composed of a film forming corrosion inhibitor and a neutralization corrosion inhibitor, the slow release rate is improved to more than 95 percent from about 90 percent of the original similar corrosion inhibitor, and the corrosion problem of a high-pressure air cooler, downstream equipment and pipeline equipment of a hydrofining and hydrocracking device can be effectively solved;

(2) polar groups in molecules can be adsorbed on the surface of a metal body to form a layer of compact protective film, the metal and a medium are separated, and nonpolar groups are dissolved in oil and can be directionally arranged in the oil to form a hydrophobic adsorption protective film, so that corrosion of steel equipment is slowed down or inhibited, and iron ions in condensed water at the top of a fractionating tower of a hydrogenation reactor are greatly reduced;

(3) the invention can be directly added into the whole corrosion system, has simple and convenient operation for preventing or reducing corrosion and quick effect, and protects the whole equipment system, so that the whole equipment system can be made of cheap materials, the precious materials and the maintenance cost are saved, and the cost is saved.

Detailed Description

Example 1:

taking 15% of imidazoline, 35% of ethylenediamine, 20% of organic solvent, 10% of monoethanolamine and 20% of desalted water according to mass percentage for standby application, wherein the organic solvent is formed by mixing diethylene glycol and methanol according to the mass ratio of 1:1, firstly sequentially adding the organic amine, the organic solvent and the desalted water into a reaction kettle, stirring and mixing for 30 minutes at normal temperature, adding m-diazacyclopentene or derivatives thereof under the stirring condition, heating to 60 ℃, keeping the temperature for 1-1.5 hours, adding alcohol compounds, continuously stirring for 0.5-1 hour, then discharging and filtering to obtain the product.

Example 2:

taking 30% of imidazoline, 20% of ethylenediamine, 20% of organic solvent, 10% of monoethanolamine and 20% of desalted water according to mass percentage for standby application, wherein the organic solvent is diethylene glycol and methanol which are mixed according to the mass ratio of 1.5:1, firstly, sequentially adding the organic amine, the organic solvent and the desalted water into a reaction kettle, stirring and mixing for 30 minutes at normal temperature, adding m-diazacyclopentene or derivatives thereof under the stirring condition, heating to 60 ℃, keeping the temperature for 1-1.5 hours, adding alcohol compounds, continuously stirring for 0.5-1 hour, then discharging and filtering to obtain the product.

Example 3:

taking 15% of imidazoline, 25% of ethylenediamine, 30% of organic solvent, 10% of monoethanolamine and 20% of desalted water according to mass percentage for standby application, wherein the organic solvent is formed by mixing diethylene glycol and methanol according to the mass ratio of 2:1, firstly sequentially adding the organic amine, the organic solvent and the desalted water into a reaction kettle, stirring and mixing for 30 minutes at normal temperature, adding m-diazacyclopentene or derivatives thereof under the stirring condition, heating to 60 ℃, keeping the temperature for 1-1.5 hours, adding alcohol compounds, continuously stirring for 0.5-1 hour, then discharging and filtering to obtain the product.

Example 4:

taking 20% of imidazoline, 25% of ethylenediamine, 20% of organic solvent, 15% of monoethanolamine and 20% of desalted water according to mass percentage for standby application, wherein the organic solvent is diethylene glycol and methanol which are mixed according to the mass ratio of 2.5:1, firstly, sequentially adding the organic amine, the organic solvent and the desalted water into a reaction kettle, stirring and mixing for 30 minutes at normal temperature, adding m-diazacyclopentene or derivatives thereof under the stirring condition, heating to 60 ℃, keeping the temperature for 1-1.5 hours, adding alcohol compounds, continuously stirring for 0.5-1 hour, then discharging and filtering to obtain the product.

Example 5:

taking 15% of imidazoline, 20% of ethylenediamine, 20% of organic solvent, 10% of monoethanolamine and 35% of desalted water according to mass percentage for standby application, wherein the organic solvent is diethylene glycol and methanol which are mixed according to the mass ratio of 1.5:1, firstly, sequentially adding the organic amine, the organic solvent and the desalted water into a reaction kettle, stirring and mixing for 30 minutes at normal temperature, adding m-diazacyclopentene or derivatives thereof under the stirring condition, heating to 60 ℃, keeping the temperature for 1-1.5 hours, adding alcohol compounds, continuously stirring for 0.5-1 hour, then discharging and filtering to obtain the product.

Example 6:

the physical and chemical properties of each anticorrosive agent obtained in examples 1 to 5 are specifically shown in the following table.