CN114410348B - Coking-inhibiting scale inhibitor for retarding coking of bed layer of gasoline hydrogenation device - Google Patents
Coking-inhibiting scale inhibitor for retarding coking of bed layer of gasoline hydrogenation device Download PDFInfo
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- CN114410348B CN114410348B CN202111607487.6A CN202111607487A CN114410348B CN 114410348 B CN114410348 B CN 114410348B CN 202111607487 A CN202111607487 A CN 202111607487A CN 114410348 B CN114410348 B CN 114410348B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G75/00—Inhibiting corrosion or fouling in apparatus for treatment or conversion of hydrocarbon oils, in general
- C10G75/04—Inhibiting corrosion or fouling in apparatus for treatment or conversion of hydrocarbon oils, in general by addition of antifouling agents
Abstract
The invention relates to the technical field of scale inhibitors, and discloses a coking-inhibiting scale inhibitor for slowing down bed coking of a gasoline hydrogenation device, which comprises a scale inhibitor, a coking-inhibiting agent and a chelating agent, wherein the weight ratio of the scale inhibitor to the coking-inhibiting agent to the chelating agent is 10-30:20-60:2-8. The coking-inhibiting scale inhibitor for retarding the coking of the bed layer of the gasoline hydrogenation device is characterized in that the obtained coking-inhibiting scale inhibitor has a coking-inhibiting effect and can realize scale inhibition at the same time through the respective preparation and final mixing and stirring of the scale inhibitor, so that the coking-inhibiting scale inhibitor has the characteristics of one dose of multi-use and frequent operation reduction, and the final compounding operation of the scale inhibitor and the coking inhibitor is realized through the chelating agent, so that the coking-inhibiting scale inhibitor can prevent the chemical reaction precipitation of metal ions such as calcium, magnesium and the like, reduce the formation time of the fouling of the bed layer and promote the mutual adsorption between the scale inhibitor and the coking inhibitor, and has a certain combination effect while the subsequent release flow.
Description
Technical Field
The invention relates to the technical field of scale inhibitors, in particular to a coking-inhibiting scale inhibitor for slowing bed coking of a gasoline hydrogenation device.
Background
Gasoline is a volatile and combustible hydrocarbon mixture liquid which is fractionated and cracked from petroleum, can be used as fuel, is transparent liquid in appearance and is combustible, the distillation range is 30-220 ℃, the main components are C5-C12 aliphatic hydrocarbon and naphthenic hydrocarbon, and a certain amount of aromatic hydrocarbon, the gasoline has higher octane number (anti-knock combustion performance), and is divided into 89, 90, 92, 93, 95, 97, 98 and other brands according to the octane number, in order to slow down the bed layer in a gasoline hydrogenation device, the scale inhibitor can be used by coking, and is a medicament which has the functions of dispersing insoluble inorganic salt in water, preventing or interfering the precipitation and scaling of the insoluble inorganic salt on the metal surface, and maintaining the good heat transfer effect of metal equipment, and can remove the scale and prevent the formation of scale, improve the heat exchange efficiency, reduce the electric energy or reduce the consumption of the fuel; water treatment also reduces emissions and increases water availability, whereas hydrogenation refers to a reaction process in which hydrogen interacts with other compounds, usually in the presence of a catalyst.
However, when the traditional scale inhibitor is discharged into a designated position through a pipeline, if the discharge amount is too large or the concentration of the scale inhibitor is too high, the stability of the scale inhibitor is easily reduced, so that the scale inhibitor can play a scale inhibition effect only when the scale inhibitor is effectively in high concentration, and most of the existing scale inhibitors and coke inhibitors are separately used, so that the operation time limit is longer, frequent operation is required, scale inhibition and coke inhibition cannot be synchronously performed, and the condition that the scale inhibition and coke inhibition effects are poor is easily caused, so that the coke inhibition scale inhibitor for slowing down the coking bed layer of the gasoline hydrogenation device is provided.
Disclosure of Invention
In order to overcome the above defects in the prior art, the embodiment of the invention provides a coke-inhibiting scale inhibitor for slowing down bed layer coking of a gasoline hydrogenation device, and the technical problems to be solved by the invention are as follows: the operation time is reduced, and the scale inhibition effect is improved, so that the scale inhibition and the coke inhibition are synchronously performed.
In order to achieve the purpose, the invention provides the following technical scheme: a coking-inhibiting scale inhibitor for slowing bed coking of a gasoline hydrogenation device comprises a scale inhibitor, a coking inhibitor and a chelating agent, wherein the weight ratio of the scale inhibitor to the coking inhibitor to the chelating agent is 10-30:20-60:2-8, mixing;
the scale inhibitor is:
(1) 1 to 5 percent of antioxidant
(2) 10 to 15 percent of dispersant
(3) 70 to 90 percent of polymerization inhibitor
(4) The rest is deionized water
The polymerization inhibitor comprises neutralized amine, organic phosphate and tungstate, and the mass ratio of the neutralized amine to the organic phosphate to the tungstate is 1-20:30-50:260-400 are mixed;
the coke inhibitor is:
(1) 7 to 25 percent of defoaming agent
(2) 5 to 15 percent of emulsifier
(3) 1 to 10 percent of organic solvent
(4) 8 to 85 percent of organic compound
The organic compound comprises a phenolic compound and an amine compound, and the mass ratio of the phenolic compound to the amine compound is 1-10:20-50;
the phenolic compound is phenol, and the amine compound is methylamine CH 3 NH 2 Aniline C 6 H 5 NH 2 Ethylene diamine H 2 NCH 2 CH 2 NH 2 Diisopropylamine, and triethylene alcoholOne or two of amine and tetrabutylammonium bromide;
the chelating agent is:
(1) 78% -85% of hexamethylenediamine tetramethylene phosphonic acid, 2-phospho-1, 2, 4-tricarboxylic acid butane
(2) 0.8 to 1.8 percent of synergist
(3) And 2-18% of emulsifier.
Optionally, the antioxidant is one of ascorbyl palmitate, propyl gallate, butyl hydroxyanisole and phytic acid.
Optionally, the dispersant is one or a mixture of more of seaweed gel, lauryl alcohol and polyoxyethylene alkyl ether.
Optionally, the organic solvent is selected from any one or more of styrene, perchloroethylene, trichloroethylene, ethylene glycol ether and triethanolamine.
The invention provides a preparation method of a coking-inhibiting scale inhibitor for retarding coking of a bed layer of a gasoline hydrogenation device, which comprises the following preparation steps:
s1) and scale inhibitor
S11), weighing an antioxidant, a dispersant and deionized water according to a certain proportion, placing the antioxidant, the dispersant and the deionized water in a container, and uniformly stirring at the temperature of 30-60 ℃;
s12), adding the solution obtained in the step S11) into a stirrer, adding a polymerization inhibitor according to a certain proportion, stirring at the speed of 800-1000 r/min at the temperature of 60-75 ℃, stirring for 10-20 min, and standing for 10-20 min;
s2) compounding of coke inhibitor
S21), weighing the defoaming agent, the emulsifier, the organic solvent and the organic compound according to a certain proportion, placing the mixture in a stirrer at the stirring speed of 800-1000 r/min, the stirring temperature of 60-65 ℃ and the stirring time of 10-20 min, and then standing the mixture until the mixture is cooled to room temperature;
s3), adding hexamethylenediamine tetramethylene phosphonic acid, 2-phosphate-1, 2, 4-tricarboxylic acid butane, a synergist, an emulsifier and the solution prepared in the steps S12) and S21) into a stirrer synchronously, heating the solution to 65 ℃, and then stirring for 10-20H at normal temperature at the stirring speed of 80-100 r/min.
The scale inhibitor, the coke inhibitor and the chelating agent are respectively prepared and finally mixed and stirred, so that the obtained coke inhibiting and scale inhibiting agent has a coke inhibiting effect and can inhibit scale, the characteristics of one agent with multiple purposes and frequent operation reduction are realized, and the final compounding operation of the scale inhibitor and the coke inhibitor is realized through the chelating agent, so that the scale inhibitor and the coke inhibitor can prevent the chemical reaction precipitation of metal ions such as calcium, magnesium and the like, reduce the formation time of bed scale, promote the mutual adsorption between the scale inhibitor and the coke inhibitor, and have a certain combination effect when the scale inhibitor and the coke inhibitor are released to flow in the follow-up process, so that the single flow volume can be increased, the blocking effect of special branches on the scale is further facilitated, and the scale inhibiting and coke inhibiting effects of the coke inhibiting and scale inhibitor are further enhanced.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the invention provides a technical scheme that: a coking-inhibiting scale inhibitor for slowing down coking of a bed layer of a gasoline hydrogenation device comprises a scale inhibitor, a coking-inhibiting agent and a chelating agent, wherein the scale inhibitor, the coking-inhibiting agent and the chelating agent are mixed according to a mass ratio of 10:20:2, mixing;
the scale inhibitor is:
(1) 1 to 5 percent of antioxidant
(2) 10 to 15 percent of dispersant
(3) 70 to 90 percent of polymerization inhibitor
(4) The balance being deionized water
The polymerization inhibitor comprises neutralized amine, organic phosphate and tungstate, and the mass ratio of the neutralized amine to the organic phosphate to the tungstate is 1:30:260 of a mixture of the components;
the coke inhibitor is:
(1) 7 to 25 percent of defoaming agent
(2) 5 to 15 percent of emulsifier
(3) 1 to 10 percent of organic solvent
(4) 8 to 85 percent of organic compound
The organic compounds comprise phenolic compounds and amine compounds, and the mass ratio of the phenolic compounds to the amine compounds is 1:20;
the phenolic compound is phenol, and the amine compound is methylamine CH 3 NH 2 Aniline C 6 H 5 NH 2 Ethylene diamine H 2 NCH 2 CH 2 NH 2 One or two of diisopropylamine, triethanolamine and tetrabutylammonium bromide;
the chelating agent is:
(1) 78% -85% of hexamethylenediamine tetramethylene phosphonic acid, 2-phospho-1, 2, 4-tricarboxylic acid butane
(2) 0.8 to 1.8 percent of synergist
(3) And 2-18% of emulsifier.
The antioxidant is one of ascorbyl palmitate, propyl gallate, butyl hydroxy anisol and phytic acid.
The dispersant is one or more of alginate jelly, lauryl alcohol and polyoxyethylene alkyl ether,
the antioxidant is one of ascorbyl palmitate, propyl gallate, butyl hydroxy anisol and phytic acid, and the dispersant is one or more of alginate jelly, lauryl alcohol and polyoxyethylene alkyl ether;
the organic solvent is selected from one or more of styrene, perchloroethylene, trichloroethylene, ethylene glycol ether and triethanolamine.
Example 2:
the invention provides a technical scheme that: a coking-inhibiting scale inhibitor for slowing bed coking of a gasoline hydrogenation device comprises a scale inhibitor, a coking inhibitor and a chelating agent, wherein the weight ratio of the scale inhibitor to the coking inhibitor to the chelating agent is 15:25:3, mixing;
the scale inhibitor is:
(1) 1 to 5 percent of antioxidant
(2) 10 to 15 percent of dispersant
(3) 70 to 90 percent of polymerization inhibitor
(4) The balance being deionized water
The polymerization inhibitor comprises neutralized amine, organic phosphate and tungstate, and the mass ratio of the polymerization inhibitor to the polymerization inhibitor is 5:35:270 are mixed;
the coke inhibitor is:
(1) 7 to 25 percent of defoaming agent
(2) 5 to 15 percent of emulsifier
(3) 1 to 10 percent of organic solvent
(4) 8 to 85 percent of organic compound
The organic compounds comprise phenolic compounds and amine compounds, and the mass ratio of the phenolic compounds to the amine compounds is 2:25;
the phenolic compound is phenol, and the amine compound is methylamine CH 3 NH 2 Aniline C 6 H 5 NH 2 Ethylene diamine H 2 NCH 2 CH 2 NH 2 One or two of diisopropylamine, triethanolamine and tetrabutylammonium bromide;
the chelating agent is:
(1) Hexamethylenediamine tetramethylene phosphonic acid, 2-phosphoric acid-1, 2, 4-tricarboxylic acid butane 78% -85%
(2) 0.8 to 1.8 percent of synergist
(3) And 2-18% of emulsifier.
The antioxidant is one of ascorbyl palmitate, propyl gallate, butyl hydroxy anisol and phytic acid.
The dispersant is one or more of alginate jelly, lauryl alcohol and polyoxyethylene alkyl ether;
the antioxidant is one of ascorbyl palmitate, propyl gallate, butyl hydroxy anisol and phytic acid, and the dispersant is one or more of alginate jelly, lauryl alcohol and polyoxyethylene alkyl ether;
the organic solvent is selected from one or more of styrene, perchloroethylene, trichloroethylene, ethylene glycol ether and triethanolamine.
Example 3:
the invention provides a technical scheme that: a coking-inhibiting scale inhibitor for slowing down coking of a bed layer of a gasoline hydrogenation device comprises a scale inhibitor, a coking-inhibiting agent and a chelating agent, wherein the scale inhibitor, the coking-inhibiting agent and the chelating agent are mixed according to a mass ratio of 20:30:4, mixing;
the scale inhibitor is:
(1) 1 to 5 percent of antioxidant
(2) 10 to 15 percent of dispersant
(3) 70 to 90 percent of polymerization inhibitor
(4) The balance being deionized water
The polymerization inhibitor comprises neutralized amine, organic phosphate and tungstate, and the mass ratio of the polymerization inhibitor is 9:40:280 are mixed;
the coke inhibitor is:
(1) 7 to 25 percent of defoaming agent
(2) 5 to 15 percent of emulsifier
(3) 1 to 10 percent of organic solvent
(4) 8 to 85 percent of organic compound
The organic compounds comprise phenolic compounds and amine compounds, and the mass ratio of the phenolic compounds to the amine compounds is 4:30, of a nitrogen-containing gas;
the phenolic compound is phenol, and the amine compound is methylamine CH 3 NH 2 Aniline C 6 H 5 NH 2 Ethylene diamine H 2 NCH 2 CH 2 NH 2 One or two of diisopropylamine, triethanolamine and tetrabutylammonium bromide;
the chelating agent is:
(1) Hexamethylenediamine tetramethylene phosphonic acid, 2-phosphoric acid-1, 2, 4-tricarboxylic acid butane 78% -85%
(2) 0.8 to 1.8 percent of synergist
(3) And 2-18% of emulsifier.
The antioxidant is one of ascorbyl palmitate, propyl gallate, butyl hydroxy anisol and phytic acid.
The dispersant is one or more of alginate jelly, lauryl alcohol and polyoxyethylene alkyl ether;
the antioxidant is one of ascorbyl palmitate, propyl gallate, butyl hydroxy anisol and phytic acid, and the dispersant is one or more of alginate jelly, lauryl alcohol and polyoxyethylene alkyl ether;
the organic solvent is selected from one or more of styrene, perchloroethylene, trichloroethylene, ethylene glycol ether and triethanolamine.
Example 4:
the invention provides a technical scheme that: a coking-inhibiting scale inhibitor for slowing bed coking of a gasoline hydrogenation device comprises a scale inhibitor, a coking inhibitor and a chelating agent, wherein the weight ratio of the scale inhibitor to the coking inhibitor to the chelating agent is 25:35:5, mixing the components;
the scale inhibitor is:
(1) 1 to 5 percent of antioxidant
(2) 10 to 15 percent of dispersant
(3) 70 to 90 percent of polymerization inhibitor
(4) The rest is deionized water
The polymerization inhibitor comprises neutralized amine, organic phosphate and tungstate, and the mass ratio of the neutralized amine to the organic phosphate to the tungstate is 14:45:300 are mixed;
the coke inhibitor is:
(1) 7 to 25 percent of defoaming agent
(2) 5 to 15 percent of emulsifier
(3) 1 to 10 percent of organic solvent
(4) 8 to 85 percent of organic compound
The organic compounds comprise phenolic compounds and amine compounds, and the mass ratio of the phenolic compounds to the amine compounds is 6:35;
the phenolic compound is phenol, and the amine compound is methylamine CH 3 NH 2 Aniline C 6 H 5 NH 2 Ethylene diamine H 2 NCH 2 CH 2 NH 2 One or two of diisopropylamine, triethanolamine and tetrabutylammonium bromide;
the chelating agent is:
(1) Hexamethylenediamine tetramethylene phosphonic acid, 2-phosphoric acid-1, 2, 4-tricarboxylic acid butane 78% -85%
(2) 0.8 to 1.8 percent of synergist
(3) And 2-18% of emulsifier.
The antioxidant is one of ascorbyl palmitate, propyl gallate, butyl hydroxy anisol and phytic acid.
The dispersant is one or more of alginate jelly, lauryl alcohol and polyoxyethylene alkyl ether;
the antioxidant is one of ascorbyl palmitate, propyl gallate, butyl hydroxy anisol and phytic acid, and the dispersant is one or more of alginate jelly, lauryl alcohol and polyoxyethylene alkyl ether;
the organic solvent is selected from one or more of styrene, perchloroethylene, trichloroethylene, ethylene glycol ether and triethanolamine.
EXAMPLE five
The coke-inhibiting scale inhibitor prepared in the first to fourth embodiments is respectively taken as 10 parts, each 10 parts is taken as one group, four groups (40 parts) of four groups are combined together as one unit, the coke-inhibiting scale inhibitor in the four units is used by being divided into four gasoline hydrogenation devices in different areas, and the following data are obtained through detection:
| practice of Example (B) | Amount of addition mg/L | Addition amount mg/L | Ambient temperature Degree C. | Body temperature of liquid Degree C. | Effective in dispersing Fe2O3 Concentration mg/L | Of solutions containing Fe2O3 Light transmittance% | Time interval Break min | Resistance device Scale formation Rate of change | Restraining device Coke Rate of change | Comprehensive coke resistance suppression Efficiency of scale |
| Practice of Example one | 300mg/ L | 100mg/ L | 40℃ | 30℃ | 5mg/L | 30％ | 40min | 87 ％ | 93 ％ | 90％ |
| Practice of Example two | 300mg/ L | 100mg/ L | 40℃ | 30℃ | 9mg/L | 50％ | 40min | 96 ％ | 97 ％ | 97％ |
| Practice of EXAMPLE III | 300mg/ L | 100mg/ L | 40℃ | 30℃ | 15mg/L | 25％ | 40min | 88 ％ | 94 ％ | 89％ |
| Practice of Example four | 300mg/ L | 100mg/ L | 40℃ | 30℃ | 9mg/L | 20％ | 40min | 92 ％ | 98 ％ | 94％ |
As can be seen from the above table, in example two, the scale inhibitor, the coke inhibitor and the chelating agent are mixed according to the mass ratio of 15:25: 3. the polymerization inhibitor comprises neutralized amine, organic phosphate and tungstate, and the mass ratio of the neutralized amine to the organic phosphate to the tungstate is 5:35:270, the organic compound comprises a phenolic compound and an amine compound, and the mass ratio of the phenolic compound to the amine compound is 2:25, the scale inhibitor, the coke inhibitor and the chelating agent are respectively prepared and finally mixed and stirred, so that the obtained coke inhibiting scale inhibitor has a coke inhibiting effect and can simultaneously inhibit scale, so that the characteristics of one dose of multi-use and frequent operation are realized, and the final compounding operation of the scale inhibitor and the coke inhibitor is realized through the chelating agent, so that the scale inhibitor and the coke inhibitor can prevent the chemical reaction precipitation of metal ions such as calcium, magnesium and the like, reduce the scale formation of a slow bed layer and simultaneously promote the mutual adsorption between the scale inhibitor and the coke inhibitor, so that the scale inhibitor and the coke inhibitor still have a certain combination effect while subsequently releasing flow, thereby increasing the single flow volume of the scale inhibitor, being more beneficial to the barrier effect of special branches on the scale, and further enhancing the scale inhibiting and coke inhibiting effects of the coke inhibiting scale inhibitor.
In conclusion, the preparation steps of the coking inhibiting scale inhibitor for retarding the coking of the bed layer of the gasoline hydrogenation device are as follows;
s1) compounding of scale inhibitor
S11), weighing an antioxidant, a dispersant and deionized water according to a certain proportion, placing the antioxidant, the dispersant and the deionized water in a container, and uniformly stirring at the temperature of 30-60 ℃;
s12), adding the solution obtained in the step S11) into a stirrer, adding a polymerization inhibitor according to a certain proportion, stirring at the speed of 800-1000 r/min at the temperature of 60-75 ℃, stirring for 10-20 min, and standing for 10-20 min;
s2) compounding of coke inhibitor
S21), weighing the defoaming agent, the emulsifying agent, the organic solvent and the organic compound according to a certain proportion, placing the mixture in a stirrer at the stirring speed of 800-1000 r/min, the stirring temperature of 60-65 ℃ and the stirring time of 10-20 min, and then standing the mixture until the mixture is cooled to room temperature;
s3) adding hexamethylenediamine tetramethylene phosphonic acid, 2-phospho-1, 2, 4-butane tricarboxylate, a synergist, an emulsifier and the solution prepared in the steps S12) and S21) into a stirrer synchronously, heating the solution to 65 ℃, and then stirring for 10-20H at normal temperature at the stirring speed of 80-100 r/min.
And finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (5)
1. A coking-inhibiting scale inhibitor for slowing down coking of a bed layer of a gasoline hydrogenation device is characterized in that: the scale inhibitor, the coke inhibitor and the chelating agent are mixed according to the mass ratio of 10-30:20-60:2-8, mixing;
the scale inhibitor is:
(1) 1 to 5 percent of antioxidant
(2) 10 to 15 percent of dispersant
(3) 70 to 90 percent of polymerization inhibitor
(4) The balance being deionized water
The polymerization inhibitor comprises neutralized amine, organic phosphate and tungstate, and the mass ratio of the neutralized amine to the organic phosphate to the tungstate is 1-20:30-50:260-400 are mixed;
the coke inhibitor is:
(1) 7 to 25 percent of defoaming agent
(2) 5 to 15 percent of emulsifier
(3) 1 to 10 percent of organic solvent
(4) 8 to 85 percent of organic compound
The organic compound comprises a phenolic compound and an amine compound, and the mass ratio of the phenolic compound to the amine compound is 1-10:20-50 parts of;
the phenolic compound is phenol, and the amine compound is methylamine CH 3 NH 2 Aniline C 6 H 5 NH 2 Ethylene diamine H 2 NCH 2 CH 2 NH 2 One or two of diisopropylamine, triethanolamine and tetrabutylammonium bromide;
the chelating agent is:
(1) 78% -85% of hexamethylenediamine tetramethylidene phosphonic acid and 2-phosphoric acid-1, 2, 4-tricarboxylic acid butane
(2) 0.8 to 1.8 percent of synergist
(3) 2 to 18 percent of emulsifier, and the sum of the percentages of the components is 100 percent.
2. The coke-inhibiting scale inhibitor for slowing bed coking of the gasoline hydrogenation unit according to claim 1 is characterized in that: the antioxidant is one of ascorbyl palmitate, propyl gallate, butyl hydroxy anisol and phytic acid.
3. The coking inhibiting scale inhibitor for retarding coking in the bed layer of gasoline hydrogenating equipment as set forth in claim 1 is characterized in that: the dispersing agent is one or a mixture of more of seaweed gel, lauryl alcohol and polyoxyethylene alkyl ether.
4. The coking inhibiting scale inhibitor for retarding coking in the bed layer of gasoline hydrogenating equipment as set forth in claim 1 is characterized in that: the organic solvent is selected from any one or more of styrene, perchloroethylene, trichloroethylene, ethylene glycol ether and triethanolamine.
5. A preparation method of the coking and scale inhibiting agent for slowing bed coking of the gasoline hydrogenation unit as claimed in any one of the claims 1 to 4 is characterized in that: the preparation method comprises the following preparation steps:
s1) compounding of scale inhibitor
S11), weighing an antioxidant, a dispersant and deionized water according to a certain proportion, placing the antioxidant, the dispersant and the deionized water in a container, and uniformly stirring at the temperature of 30-60 ℃;
s12), adding the solution obtained in the step S11) into a stirrer, adding a polymerization inhibitor according to a certain proportion, stirring at the speed of 800-1000 r/min at the temperature of 60-75 ℃, stirring for 10-20 min, and standing for 10-20 min;
s2) compounding of coke inhibitor
S21), weighing the defoaming agent, the emulsifier, the organic solvent and the organic compound according to a certain proportion, placing the mixture in a stirrer at the stirring speed of 800-1000 r/min, the stirring temperature of 60-65 ℃ and the stirring time of 10-20 min, and then standing the mixture until the mixture is cooled to room temperature;
s3), adding hexamethylenediamine tetramethylene phosphonic acid, 2-phosphate-1, 2, 4-tricarboxylic acid butane, a synergist, an emulsifier and the solution prepared in the steps S12) and S21) into a stirrer synchronously, heating the solution to 65 ℃, and stirring for 10-20 h at normal temperature at the stirring speed of 80-100 r/min.
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| US20110001083A1 (en) * | 2009-07-02 | 2011-01-06 | Clearwater International, Llc | Environmentally benign water scale inhibitor compositions and method for making and using same |
| CN111378506B (en) * | 2018-12-27 | 2022-10-04 | 中国石油天然气股份有限公司 | Scale inhibitor and preparation method thereof |
| CN113135620A (en) * | 2021-04-30 | 2021-07-20 | 山东零点环保科技有限公司 | Composite scale inhibitor and preparation method thereof |
| CN113563927A (en) * | 2021-07-23 | 2021-10-29 | 上海良田化工有限公司 | Efficient and environment-friendly scale inhibitor for gasoline stripping tower of ethylene device and preparation method of scale inhibitor |
| CN113666512A (en) * | 2021-09-18 | 2021-11-19 | 天津市瑞德赛恩新材料开发有限公司 | Anti-coking scale inhibitor for sewage stripping tower and preparation method thereof |
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