CN114163329A - Antifouling agent - Google Patents
Antifouling agent Download PDFInfo
- Publication number
- CN114163329A CN114163329A CN202111546985.4A CN202111546985A CN114163329A CN 114163329 A CN114163329 A CN 114163329A CN 202111546985 A CN202111546985 A CN 202111546985A CN 114163329 A CN114163329 A CN 114163329A
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- CN
- China
- Prior art keywords
- acrylate
- methacrylate
- antifouling agent
- antifoulant
- added
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/48—Separation; Purification; Stabilisation; Use of additives
- C07C67/62—Use of additives, e.g. for stabilisation
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention discloses an antifouling agent, which consists of imidazoline with a specified structure, wherein X is hydroxyl or amino, and R is alkyl with 4-20 carbon atoms; the antifouling agent is added into an acrylate or methacrylate device to prevent the acrylate or methacrylate device from scaling. The imidazoline antifouling agent with a specified structure is adopted as the antifouling agent, so that the dirt in an acrylate or methacrylate device can be effectively dispersed, and the aggregation and deposition of the dirt in a system are prevented; according to the weight of the process fluid and the characteristics of the device, the imidazoline with reasonable concentration can be selected, the cost is reasonable, and the effect is obvious.
Description
Technical Field
The invention relates to the technical field of preparation of acrylate or methacrylate, in particular to an antifouling agent for preventing an acrylate or methacrylate device from scaling.
Background
The acrylate or methacrylate is used as an important material monomer, is mainly used for producing polymethyl methacrylate (PMMA), acrylate copolymers ACR and MBS and is used as a second monomer for producing acrylic fibers, and is widely used in the fields of automobiles, buildings, aerospace, electronic information, textiles, coatings and the like.
Acrylate or methacrylate belongs to an extremely polymerizable vinyl monomer, and an undesirable polymerization reaction is generally existed in the production process of the acrylate or methacrylate, and the generated polymer can be precipitated from the process fluid and deposited on the surface of equipment, so that pipelines, tower plates, pump bodies and the like are blocked, and the stable operation of a production device is greatly influenced. Therefore, the most common method at present is to add an appropriate polymerization inhibitor during the production process to suppress the undesired polymerization reaction. The polymerization inhibitor industrially used in the production of acrylic ester or methacrylic ester generally includes radical type (e.g., 4-hydroxy-2, 2,6, 6-tetramethylpiperidine nitroxide radical HTMPO), phenolic compound (e.g., hydroquinone HQ, hydroquinone monomethyl ether MEHQ), amine (e.g., phenothiazine PTZ, phenylenediamine PDA), etc. However, even if these polymerization inhibitors are used, the scale formation by the polymerization reaction cannot be completely prevented, and it is necessary to periodically clean the scale formed in the system.
To address this problem, one approach has been to add suitable antifoulants or dispersants to the process fluid to effectively dissolve or disperse the polymer formed in the system, reducing polymer build-up in the system. Chinese patent CN 107074990a discloses an agent for reducing fouling and agglomeration of polymers in acrylate/methacrylate/acrylate processes, which comprises alkyl, alkylaryl, aryl or phthalic acid esters.
Disclosure of Invention
The object of the present invention is to provide an antifouling agent for preventing fouling of acrylate or methacrylate devices, which addresses the deficiencies in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
an antifouling agent, which consists of imidazoline with the following structure,
wherein X is hydroxyl or amino, R is alkyl of 4 to 20 carbons;
the antifouling agent is added into an acrylate or methacrylate device to prevent the acrylate or methacrylate device from scaling.
In the production process of acrylate or methacrylate, the acrylate or methacrylate is very easy to generate polymerization reaction and form scale, and the scale can block pipes, tower plates, pump bodies and the like in the device so as to influence the operation of the device; the scheme adopts imidazoline with a specified structure as an antifouling agent for preventing the fouling of the acrylate or methacrylate device, can effectively disperse polymers formed in a system, reduce the accumulation of the polymers, and simultaneously can avoid the precipitation and deposition of newly formed polymers in the system, thereby ensuring the stable operation of the device.
Preferably, R is one of octyl, decyl, oleyl, tall oil, coco, lauryl, stearyl, or myristyl.
Preferably, the acrylate or methacrylate production apparatus is an acrylate or methacrylate production apparatus, and the antifouling agent is added to the acrylate or methacrylate production apparatus by a flow pump. The scheme adopts the flow pump to pump the antifouling agent into the acrylic ester or methacrylic ester production device, and the addition of the antifouling agent can be accurately controlled.
Preferably, the amount of antifoulant added to the acrylate or methacrylate device is from 10 to 10000ppm based on the weight of the process fluid in the acrylate or methacrylate device. In this case, it is necessary to optimize the amount of the antifouling agent to be added according to the specific operating state of the acrylate or methacrylate apparatus.
Preferably, the antifoulant is added to the acrylate or methacrylate device in combination with a solvent or inert component. The imidazoline used as the antifouling agent can be used alone or together with a solvent or an inert component after being combined,
preferably, the process fluid comprises acrylate, methacrylate and production raw materials and byproducts thereof.
Compared with the prior art, the invention has the beneficial effects that:
in the invention, imidazoline with a specified structure is used as an antifouling agent, so that the dirt in an acrylate or methacrylate device can be effectively dispersed, and the aggregation and deposition of the dirt in a system are prevented; according to the weight of the process fluid and the characteristics of the device, the imidazoline with reasonable concentration can be selected, the cost is reasonable, and the effect is obvious.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with 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, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
The invention provides a technical scheme that:
an antifouling agent, which consists of imidazoline with the following structure,
wherein X is hydroxyl or amino, R is alkyl of 4 to 20 carbons;
the antifoulant is added to the acrylate or methacrylate device to prevent fouling of the acrylate or methacrylate device.
Further, R is one of octyl, decyl, oleyl, tall oil, coco, lauryl, stearyl or myristyl.
Further, the acrylate or methacrylate apparatus is an acrylate or methacrylate production apparatus, and the antifouling agent is added to the acrylate or methacrylate production apparatus by a flow pump.
Further, the amount of antifoulant added to the acrylate or methacrylate device is from 10 to 10000ppm by weight of the process fluid in the acrylate or methacrylate device.
Further, the anti-fouling agent is combined with a solvent or inert component and added to the acrylate or methacrylate device.
Further, the process fluid comprises acrylate, methacrylate and production raw materials and byproducts thereof.
Example 1: the imidazoline antifouling agent provided by the invention is used for testing the dispersing performance of the fouling
Taking a fresh polymer scale sample from a methacrylate device on site, drying and grinding the scale sample into powder, dissolving the scale sample powder with an organic solvent to prepare a concentrated scale solution, adding 10mL of process fluid containing 300ppm of the imidazoline antifouling agent into a 15mL centrifuge tube, adding 0.5mL of the prepared scale solution into the centrifuge tube, immediately and fully oscillating the centrifuge tube, standing the centrifuge tube in a room temperature environment, and observing the precipitation condition of the scale in the solution along with time;
as a comparative example, the same procedure as in example 1 was followed except that the imidazoline antifoulant of the present invention was not added to the process fluid;
from the results of the dispersion property experiments of example 1 and comparative example, it was found that after standing for 1 hour, the centrifuge tube treated with the imidazoline anti-fouling agent of the present invention did not have any deposit of scale, while the untreated centrifuge tube had a large amount of deposit of scale at the bottom and a clear top.
Thus, example 1 demonstrates that the imidazoline antifoulant of the present invention can effectively disperse the scales, preventing agglomeration and deposition of the scales.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. An antifouling agent characterized by consisting of imidazoline having the following structure,
wherein X is hydroxyl or amino, R is alkyl of 4 to 20 carbons;
the antifouling agent is added into an acrylate or methacrylate device to prevent the acrylate or methacrylate device from scaling.
2. An antifouling agent according to claim 1, wherein R is one of octyl, decyl, oleyl, tall oil, coco, lauryl, stearyl or myristyl.
3. An antifoulant according to claim 1 wherein the acrylate or methacrylate unit is an acrylate or methacrylate production unit and the antifoulant is added to the acrylate or methacrylate production unit by a flow pump.
4. An antifoulant according to claim 1 or 3 wherein the antifoulant is added in an amount of from 10 to 10000ppm by weight of the antifoulant as compared to the weight of the process fluid in the acrylate or methacrylate device.
5. An antifoulant according to claim 1 wherein the antifoulant is added to the acrylate or methacrylate device in combination with a solvent or inert component.
6. An antifoulant according to claim 4 wherein the process fluid comprises acrylates, methacrylates and raw materials and by-products of their production.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111546985.4A CN114163329A (en) | 2021-12-16 | 2021-12-16 | Antifouling agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111546985.4A CN114163329A (en) | 2021-12-16 | 2021-12-16 | Antifouling agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114163329A true CN114163329A (en) | 2022-03-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111546985.4A Pending CN114163329A (en) | 2021-12-16 | 2021-12-16 | Antifouling agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114163329A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3743603A (en) * | 1971-08-26 | 1973-07-03 | Petrolite Corp | Inhibiting scale with nitrogen-heterocyclic phosphonic acids |
| US20050139807A1 (en) * | 2003-12-30 | 2005-06-30 | Tong David Y. | Composition and method for preventing fouling in (meth)acrylic acid processes |
| CN103596916A (en) * | 2011-06-03 | 2014-02-19 | 罗门哈斯公司 | Method for reducing fouling during purification of (meth)acrylate esters |
| CN109626604A (en) * | 2018-12-24 | 2019-04-16 | 湖北兴发环保科技有限公司 | A kind of non-phosphate environment-friendly type imidazoline system's corrosion inhibiting and descaling agent and preparation method |
-
2021
- 2021-12-16 CN CN202111546985.4A patent/CN114163329A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3743603A (en) * | 1971-08-26 | 1973-07-03 | Petrolite Corp | Inhibiting scale with nitrogen-heterocyclic phosphonic acids |
| US20050139807A1 (en) * | 2003-12-30 | 2005-06-30 | Tong David Y. | Composition and method for preventing fouling in (meth)acrylic acid processes |
| CN103596916A (en) * | 2011-06-03 | 2014-02-19 | 罗门哈斯公司 | Method for reducing fouling during purification of (meth)acrylate esters |
| CN109626604A (en) * | 2018-12-24 | 2019-04-16 | 湖北兴发环保科技有限公司 | A kind of non-phosphate environment-friendly type imidazoline system's corrosion inhibiting and descaling agent and preparation method |
Non-Patent Citations (1)
| Title |
|---|
| ACS: "2413817-59-9/RN", 《REGISTRY 数据库》, pages 1 - 27 * |
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