阅读说明：本技术 一种荧光示踪型气液双相缓蚀阻垢剂及其制备方法 (Fluorescent tracing type gas-liquid dual-phase corrosion and scale inhibitor and preparation method thereof ) 是由 张璠 李伟哲 管志强 沈萍 林森 霍慧 张顺 于 2019-09-23 设计创作，主要内容包括：本发明公开了一种荧光示踪型气液双相缓蚀阻垢剂及其制备方法,通过酰亚胺类聚合物的酰亚胺基团与氨/胺类化合物发生化学反应形成类发光胺发光结构物质,通过发光物量的消耗、增添改变发光物的含量,改变发光程度,实现荧光示踪；并利用氨/胺类化合物和缓蚀剂的协同效应,为传统缓蚀阻垢剂增加气相防锈功能,最终实现荧光示踪型缓蚀阻垢剂的实际应用性能。(The invention discloses a fluorescent tracing type gas-liquid two-phase corrosion and scale inhibitor and a preparation method thereof.A luminous amine luminous structure substance is formed by the chemical reaction of imide groups of imide polymers and ammonia/amine compounds, the content of a luminous substance is changed by the consumption and addition of the luminous substance, the luminous degree is changed, and the fluorescent tracing is realized; and the synergistic effect of ammonia/amine compounds and corrosion inhibitors is utilized to add gas phase rust prevention function to the traditional corrosion and scale inhibitor, and finally the practical application performance of the fluorescent tracer corrosion and scale inhibitor is realized.)

1. A fluorescent tracing type gas-liquid two-phase corrosion and scale inhibitor is characterized by comprising the following components in percentage by mass:

0.0001-30% of imide polymer, 5-30% of ammonia/amine compound, 0.5-20% of alkaline pH regulator, 5-60% of corrosion inhibitor, 5-59.9999% of scale inhibitor and the balance of water.

2. The fluorescent tracer gas-liquid dual-phase corrosion and scale inhibitor as claimed in claim 1, wherein the imide polymer is one or more selected from aliphatic polyimide, semi-aromatic polyimide and aromatic polyimide.

3. The fluorescent tracer gas-liquid dual-phase corrosion and scale inhibitor as claimed in claim 2, wherein the average molecular weight of the imide polymer is 1500-200000.

4. The fluorescent tracing type gas-liquid dual-phase corrosion and scale inhibitor according to claim 1, wherein the ammonia/amine compound is one or more of inorganic ammonia compounds, alcohol amine compounds, aliphatic primary amine compounds, aliphatic secondary amine compounds, aliphatic tertiary amine compounds, aromatic primary amine compounds, aromatic secondary amine compounds and aromatic tertiary amine compounds.

5. The fluorescent tracing type gas-liquid two-phase corrosion and scale inhibitor according to claim 1, wherein the alkaline pH regulator is one or more of sodium hydroxide, potassium hydroxide and ammonium hydroxide.

6. The fluorescent tracer gas-liquid two-phase corrosion and scale inhibitor according to claim 1, the corrosion inhibitor is one or more of sodium benzoate, sodium nitrite, sodium tripolyphosphate, sodium hexametaphosphate, disodium hydrogen phosphate, sodium dihydrogen phosphate, dipotassium hydrogen phosphate, potassium dihydrogen phosphate, trisodium phosphate, sodium hypophosphite, hexamethylenetetramine, thiourea, urea, aniline urotropine polycondensate, benzotriazole, methyl benzotriazole, N-bis (benzotriazole methylene) laurylamine, polyol phosphate, imidazoline, caprylic/capric acid, neosilicic acid, sebacic acid, 6' -melamine trihexanoic acid, sodium gluconate, zinc gluconate, pyridine, aminopyridine, 2-mercaptobenzothiazole and 2-benzoyl-3-hydroxy-1-propylene.

7. The fluorescent tracer gas-liquid dual-phase corrosion and scale inhibitor as claimed in claim 1, wherein the scale inhibitor is one or more of citric acid, sodium lignosulfonate, tannin, starch phosphate, aminotrimethylene phosphoric acid, ethylene diamine tetramethylene phosphoric acid, diethylene triamine pentamethylene phosphoric acid, octylphenol polyoxyethylene ether phosphate, 2-phosphonic butane-1, 2, 4-tricarboxylic acid, polyacrylic acid, polyaspartic acid, polyepoxysuccinic acid, hydrolyzed polymaleic anhydride, acrylic acid maleic anhydride copolymer, and S-carboxyethyl sulfosuccinic acid.

8. A preparation method of a fluorescent tracing type gas-liquid two-phase corrosion and scale inhibitor is characterized by comprising the following steps:

mixing 0.0001-30% by mass of imide polymer and 5-30% by mass of ammonia/amine compound with water, and stirring for 5 minutes to 24 hours to obtain a mixed solution of a fluorescent substance with a luminous amine-like structure;

step (2), sequentially adding 0.5-20% of alkaline pH regulator, 5-60% of corrosion inhibitor and 5-59.9999% of scale inhibitor into the mixed solution of the fluorescent substance with the luminous amine-like structure obtained in the step (1), and stirring the mixed solution for 0.5-2 hours to obtain a uniform and transparent solution;

and (3) discharging the transparent solution obtained in the step (2) to obtain the fluorescent tracer gas-liquid two-phase corrosion and scale inhibitor.

9. The preparation method of the fluorescent tracing type gas-liquid two-phase corrosion and scale inhibitor according to claim 8, wherein the mixed solution obtained in the steps (1) and (2) is stirred at a temperature of 0-60 ℃.

10. The preparation method of the fluorescent tracing type gas-liquid two-phase corrosion and scale inhibitor according to claim 8, wherein the pH value of the mixed solution obtained in the step (2) is 6.5-14 after an alkaline pH regulator is added.

Technical Field

The invention belongs to the technical field of metal protection, and particularly relates to a fluorescent tracing type gas-liquid two-phase corrosion and scale inhibitor and a preparation method thereof.

Background

Statistically, the direct economic loss due to metal corrosion worldwide is about 7000-10000 billion dollars per year, and one fourth of the loss can be completely avoided by the rust prevention measures.

At present, a corrosion and scale inhibitor is used as a main protective medicament for equipment, pipelines, pipe networks and the like in the market, and although the corrosion and scale inhibitor can reduce scaling in the equipment or the pipelines by slowing down the corrosion rate of metal, the corrosion and scale inhibitor cannot meet the requirement of carrying out effective corrosion protection on the equipment and the pipelines in the equipment parking stage; when a pipe network circulating water system operates, gas-liquid two-phase fluid caused by the operating temperature is easy to cause cavitation erosion to pipe network metal; in the process of refining petroleum products, the top of the spherical tank and the top of the rectifying tower are corroded due to light component factors, and corrosive gas also corrodes pipelines, exploitation equipment and storage tanks in petroleum exploitation, storage and transportation; meanwhile, because the corrosion and scale inhibitor is actually applied to large-scale industrial equipment, the actual concentration of the medicament cannot be judged in time, and the corrosion of the equipment is easily caused to form huge loss because the medicament is not added in time.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a fluorescent tracing type gas-liquid two-phase corrosion and scale inhibitor and a preparation method thereof.

The purpose of the invention is realized by the following technical scheme:

the invention provides a fluorescent tracing type gas-liquid two-phase corrosion and scale inhibitor, which comprises the following components in percentage by mass:

0.0001-30% of imide polymer, 5-30% of ammonia/amine compound, 0.5-20% of alkaline pH regulator, 5-60% of corrosion inhibitor, 5-59.9999% of scale inhibitor and the balance of water.

Further, the imide polymer is one or more of aliphatic polyimide, semi-aromatic polyimide and aromatic polyimide.

Further, the average molecular weight of the imide polymer is 1500-200000.

Further, the ammonia/amine compound is one or more of an inorganic ammonia compound, an alcohol amine compound, an aliphatic primary amine compound, an aliphatic secondary amine compound, an aliphatic tertiary amine compound, an aromatic primary amine compound, an aromatic secondary amine compound and an aromatic tertiary amine compound.

Further, the alkaline pH regulator is one or more of sodium hydroxide, potassium hydroxide and ammonium hydroxide.

Further, the corrosion inhibitor is sodium benzoate, sodium nitrite, sodium tripolyphosphate, sodium hexametaphosphate, disodium hydrogen phosphate, sodium dihydrogen phosphate, dipotassium hydrogen phosphate, potassium dihydrogen phosphate, trisodium phosphate, sodium hypophosphite, hexamethylenetetramine, thiourea, urea, aniline urotropine polycondensate, benzotriazole, methyl benzotriazole, N-bis (benzotriazole methylene) laurylamine, polyol phosphate, imidazoline, caprylic/capric acid, neodecanoic acid, sebacic acid, trihexanoic acid-6, 6^’6' -melamine, sodium gluconate, zinc gluconate, pyridine, aminopyridine, 2-mercaptobenzothiazole and/or 2-benzoyl-3-hydroxy-1-propylene.

Further, the scale inhibitor is one or more of citric acid, sodium lignosulfonate, tannin, starch phosphate, aminotrimethylene phosphoric acid, ethylene diamine tetramethylene phosphoric acid, diethylenetriamine pentamethylene phosphoric acid, octyl phenol polyoxyethylene ether phosphate, 2-phosphonic butane-1, 2, 4-tricarboxylic acid, polyacrylic acid, acrylic acid maleic anhydride copolymer, polyaspartic acid, polyepoxysuccinic acid, hydrolyzed polymaleic anhydride and S-carboxyethyl sulfosuccinic acid.

The invention also provides a preparation method of the fluorescent tracing type gas-liquid two-phase corrosion and scale inhibitor, which comprises the following steps:

mixing 0.0001-30% by mass of imide polymer and 5-30% by mass of ammonia/amine compound with water, and stirring for 5 minutes to 24 hours to obtain a mixed solution of a fluorescent substance with a luminous amine-like structure;

step (2), sequentially adding 0.5-20% of alkaline pH regulator, 5-60% of corrosion inhibitor and 5-59.9999% of scale inhibitor into the mixed solution of the fluorescent substance with the luminous amine-like structure obtained in the step (1), and stirring the mixed solution for 0.5-2 hours to obtain a uniform and transparent solution;

and (3) discharging the transparent solution obtained in the step (2) to obtain the fluorescent tracer gas-liquid two-phase corrosion and scale inhibitor.

Further, the mixed solution obtained in the step (1) and the mixed solution obtained in the step (2) are stirred at the temperature of 0-60 ℃.

Further, after the mixed solution in the step (2) is added with an alkaline pH regulator, the pH value is 6.5-14.

The invention provides a fluorescent tracing type gas-liquid two-phase corrosion and scale inhibitor and a preparation method thereof.A luminous amine luminous structure substance is formed by the chemical reaction of imide groups of imide polymers and ammonia/amine compounds, the content of a luminous substance is changed by the consumption and addition of the luminous substance, the luminous degree is changed, and the fluorescent tracing is realized; and the synergistic effect of ammonia/amine compounds and corrosion inhibitors is utilized to add gas phase rust prevention function to the traditional corrosion and scale inhibitor, and finally the practical application performance of the fluorescent tracer corrosion and scale inhibitor is realized. In a word, compared with the existing product, the fluorescent tracing type gas-liquid dual-phase corrosion and scale inhibitor prepared by the invention has the remarkable advantages of wide raw material source, low price, simple preparation, fluorescent tracing, convenient use and the like.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

The embodiment provides a fluorescent tracing type gas-liquid two-phase corrosion and scale inhibitor, which comprises the following components in percentage by mass:

0.0001-30% of imide polymer, 5-30% of ammonia/amine compound, 0.5-20% of alkaline pH regulator, 5-60% of corrosion inhibitor, 5-59.9999% of scale inhibitor and the balance of water.

The fluorescent tracing is realized by chemical reaction between imide polymer and ammonia/amine compound to form luminescent amine group, when light irradiates the group, the energy of the light makes some electrons around the atomic nucleus of the group jump from the original orbit to the orbit with higher energy, namely from the ground state to the first excited singlet state or the second excited singlet state, etc. Since the first excited singlet state or the second excited singlet state, etc. are unstable, the ground state is restored, and when electrons are restored from the first excited singlet state to the ground state, energy is released in the form of light, so that fluorescence is generated; the new substance formed by the chemical reaction of imide polymer and ammonia/amine compound has excellent corrosion and scale inhibiting performance, and may be used as the component of corrosion inhibitor and scale inhibitor.

According to the invention, the fluorescent substance formed by imide polymer and ammonia/amine compound is physically dissolved in the corrosion inhibitor and the scale inhibitor, and the fluorescence capability is gradually weakened as the fluorescent substance, the corrosion inhibitor and the scale inhibitor form a conversion film on the metal surface and the concentration of the agent in water is gradually reduced. Therefore, the principle is utilized, a fluorescence spectrophotometer and an ultraviolet-visible spectrophotometer can be used for monitoring the absorbance of water quality at that time, the actual content of the medicament is deduced through the absorbance, and the purpose of monitoring the medicament content through fluorescent tracing is achieved. Meanwhile, the ammonia/amine compound can be adsorbed on the surface of metal besides participating in the synthesis of the luminescent material, and can serve as a gas phase corrosion inhibitor due to the fact that the ammonia/amine compound has gas phase volatility at normal temperature and volatilized gas can inhibit or slow down atmospheric corrosion of metal, so that the purpose of gas phase corrosion inhibition is achieved.

In a preferred embodiment, the imide-based polymer is one or more selected from the group consisting of aliphatic polyimide, semi-aromatic polyimide, and aromatic polyimide.

Further, the imide polymer has an average molecular weight of 1500 to 200000.

Because the imide group in the imide polymer and the ammonia/amine compound are subjected to chemical reaction to form a luminous amine structure, the fluorescence of the substance can be increased; and the fluorescent substance can be utilized to achieve the tracing function of the whole medicament by the synergistic, co-dissolving and adsorption characteristics of the formed fluorescent substance, the corrosion inhibitor and the scale inhibitor.

In a preferred embodiment, the ammonia/amine compound is one or more of an inorganic ammonia compound, an alcohol amine compound, an aliphatic primary amine compound, an aliphatic secondary amine compound, an aliphatic tertiary amine compound, an aromatic primary amine compound, an aromatic secondary amine compound, and an aromatic tertiary amine compound.

In a preferred embodiment, the alkaline PH adjuster is one or more of sodium hydroxide, potassium hydroxide, and ammonium hydroxide. The alkaline pH regulator can regulate the pH value of the medicament and increase the luminous intensity of fluorescence.

As a preferred embodiment, the corrosion inhibitor is sodium benzoate, sodium nitrite, sodium tripolyphosphate, sodium hexametaphosphate, disodium hydrogen phosphate, sodium dihydrogen phosphate, dipotassium hydrogen phosphate, potassium dihydrogen phosphate, trisodium phosphate, sodium hypophosphite, hexamethylenetetramine, thiourea, urea, aniline urotropine polycondensate, benzotriazole, methylbenzotriazole, N-bis (benzotriazolylmethylene) laurylamine, polyol phosphate, imidazoline, octyldecanoic acid, decanoic acid, neodecanoic acid, sebacic acid, and trihexanoic acid-6, 6^’6' -melamine, sodium gluconate, zinc gluconate, pyridine, aminopyridine, 2-mercaptobenzothiazole and/or 2-benzoyl-3-hydroxy-1-propylene. The corrosion inhibitor can slow down the corrosion of metal.

In a preferred embodiment, the scale inhibitor is one or more of citric acid, sodium lignosulfonate, tannin, starch phosphate, aminotrimethylene phosphoric acid, ethylene diamine tetramethylene phosphoric acid, diethylene triamine pentamethylene phosphoric acid, octylphenol polyoxyethylene ether phosphate, 2-phosphonic butane-1, 2, 4-tricarboxylic acid, polyacrylic acid, acrylic acid maleic anhydride copolymer, polyaspartic acid, polyepoxysuccinic acid, hydrolyzed polymaleic anhydride and S-carboxyethyl sulfosuccinic acid. The scale inhibitor can slow down the accumulation of scale on the surface of metal.

In another aspect, the present embodiment provides a method for preparing a fluorescent tracing type gas-liquid two-phase corrosion and scale inhibitor, including:

mixing 0.0001-30% by mass of imide polymer and 5-30% by mass of ammonia/amine compound with water, and stirring for 5 minutes to 24 hours to obtain a mixed solution of a fluorescent substance with a luminous amine-like structure;

step (2), sequentially adding 0.5-20% of alkaline pH regulator, 5-60% of corrosion inhibitor and 5-59.9999% of scale inhibitor into the mixed solution of the fluorescent substance with the luminous amine-like structure obtained in the step (1), and stirring the mixed solution for 0.5-2 hours to obtain a uniform and transparent solution;

and (3) discharging the transparent solution obtained in the step (2) to obtain the fluorescent tracer gas-liquid two-phase corrosion and scale inhibitor.

As a preferred embodiment, the mixed solution of the step (1) and the step (2) is stirred at a temperature of 0-60 ℃.

As a preferable embodiment, the pH value of the mixed solution in the step (2) is 6.5-14 after adding the alkaline pH regulator.

The preparation method of the fluorescent tracing type gas-liquid two-phase corrosion and scale inhibitor is characterized in that the fluorescent material is formed by chemical synthesis and then is compounded, and the prepared finished product needs to be stored in a shady and cool sealed place.