CN106565537A - Water soluble dispersing scale inhibitor and application of water soluble dispersing scale inhibitor in acrylonitrile production device - Google Patents
Water soluble dispersing scale inhibitor and application of water soluble dispersing scale inhibitor in acrylonitrile production device Download PDFInfo
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- CN106565537A CN106565537A CN201610900091.3A CN201610900091A CN106565537A CN 106565537 A CN106565537 A CN 106565537A CN 201610900091 A CN201610900091 A CN 201610900091A CN 106565537 A CN106565537 A CN 106565537A
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- component
- water soluble
- antisludging agent
- soluble disperse
- scale inhibitor
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C253/00—Preparation of carboxylic acid nitriles
- C07C253/32—Separation; Purification; Stabilisation; Use of additives
Abstract
The invention discloses a water soluble dispersing scale inhibitor and an application of the water soluble dispersing scale inhibitor in an acrylonitrile production device. The water soluble dispersing scale inhibitor comprises a component A, a component B and a component C. The component A is a copolymer of aryl sulfonate and formaldehyde. The component B is one or more of magnesium sulfate, potassium sulfate and magnesium sulfite. The component C is one or more of 2,6-di-tert-butylphenol, diethylhydroxylamine and isopropyl hydroxylamine. The mass ratio of the component A to the component B to the component C is 10-50:1-10:1-10. By adopting the water soluble dispersing scale inhibitor, scale formed by free radical polymerization and dispersion can be effectively inhibited, so that the scale is uniformly dispersed in a water phase, thus, the situation that the scale is precipitated in the acrylonitrile production device is avoided, and the production operation cycle of the device can be prolonged.
Description
Technical field
The invention belongs to acrylonitrile process field, more particularly to a kind of production device for acrylic nitrile (such as recovery tower and four
Effect vapo(u)rization system) water soluble disperse antisludging agent and its application.
Background technology
Acrylonitrile (AN) is the important monomer in organic synthesis industry.Because the double bond on its structural formula causes chemical property
It is relatively more active, it may occur that the chemical reaction such as autohemagglutination, copolymerization, hydrolysis.In process of manufacture, due to sending out for acrylonitrile polymerization
It is raw, on the one hand, to cause product yield to decline；On the other hand, polymer deposits cause heat exchanger, tower tray and technique in system
The obstruction of pipeline.
At present, the blocking of acrylonitrile reactor aftercooler, recovery tower tray floor and reboiler fouling, four-effect evaporation unit polymer
More the problems such as is the principal element for affecting acrylonitrile installation long-term operation.Said units and equipment blocking can cause material to damage
Lose, device stops and safety and environmental protection problem, has a strong impact on and restrict the long period safe and stable operation of acrylonitrile installation.
Generally using hydroquinones as polymerization inhibitor in production device for acrylic nitrile, although the polymerization inhibitor has certain inhibition
Effect, but it is less efficient, it is impossible to the generation being polymerized effectively is prevented, the service cycle of device is substantially reduced.
The content of the invention
In order to overcome weak point of the prior art, the invention provides a kind of water soluble disperse antisludging agent and its third
Application in alkene nitrile process units.Using the present invention water soluble disperse antisludging agent, can effectively suppress radical polymerization and
The dirty thing that dispersion has been formed, makes dirty thing be evenly dispersed in water phase, so as to avoid dirty thing from analysing in production device for acrylic nitrile
Go out, be capable of the production run cycle of extension fixture.
The water soluble disperse antisludging agent of the present invention, including component A, component B and component C, wherein component A are aryl sulfonic acid
The copolymer of salt and formaldehyde, component B is one or more in magnesium sulfate, potassium sulfate, magnesium sulfite, and component C is the uncles of 2,6- bis-
One or more in butylphenol, diethyl hydroxylamine and isopropylhydroxyla；The wherein mass ratio of component A, component B and component C
For 10～50：1～10：1～10, preferably 20～40：4～10：6～10.
In the water soluble disperse antisludging agent of the present invention, the aryl sulfonate in component A, aryl therein is containing one
The group of individual or multiple aromatic rings, preferably alkyl phenyl, the carbon number of wherein alkyl is preferably 12～18, can be straight chain
Alkyl, or branched alkyl.
In the water soluble disperse antisludging agent of the present invention, preferred composition includes：Component A is alkyl benzene sulfonate and formaldehyde
Polymer, component B be magnesium sulfate, component C be diethyl hydroxylamine.
In the water soluble disperse antisludging agent of the present invention, the molecular weight of component A is 1000000～6000000, preferred molecular weight
For 2000000～4000000, more preferably 2500000～3500000.
Present invention also offers a kind of application of water soluble disperse antisludging agent in production device for acrylic nitrile, including by this
Bright water soluble disperse antisludging agent is added in the liquid phase of production device for acrylic nitrile, and addition mass concentration is 5～100ppm, preferably
20～100ppm.
In application of the water soluble disperse antisludging agent of the present invention in production device for acrylic nitrile, by the water soluble disperse of the present invention
Antisludging agent be preferably added to absorber portion, exhausting section, evaporimeter, heat exchanger, reboiler, desorption device etc. easily occur fouling position and/
Or its upstream, preferred on-line continuous injection.
Solvent, preferably desalted water can be added in water soluble disperse antisludging agent of the present invention.
The present invention is obtained on the principle Research foundation of dirty thing formation in production device for acrylic nitrile.Acrylonitrile process
Device is mainly made up of operations such as reaction, chilling, absorption, recovery, refined, four-effect evaporations, and production device for acrylic nitrile is normally being given birth to
Be frequently accompanied by the generation of some polymerisations in product, wherein acrylonitrile autohemagglutination or other as hydrogen cyanide, methacrylaldehyde, acrylic acid,
The polymerization that the byproducts of reaction such as acrylamide are produced can cause occur scale problems in system.In addition, the corrosion produced in system
Accessory substance, catalyst decompose, the improper use of defoamer and pH control shakinesses etc., can acceleration system polymer generation and dirt
The deposition of thing.These dirty things occur in the form of flake or crystalline polymer mostly.The generation of dirty thing can shorten tower, reboiler
With cycle of operation of the equipment such as heat exchanger and reduce production efficiency.In general, recovery tower, stripper, absorption tower and decyanation tower
Four-effect evaporator system fouling most serious.Clear up the costly of these dirty things, it is sometimes desirable to which device stops, and causes very big to production
Economic loss.
It is generally believed that the mechanism that production device for acrylic nitrile dirt thing is produced is as follows：
The activity of acrylonitrile is at a relatively high, and spontaneous polymerization is easily produced under the situation in heating and containing iron part, and this gathers
It is to complete via the approach of radical chain reaction to close reaction.Radical chain reaction includes successively three steps：Chain initiation reaction, chain
Reaction of propagation and chain termination reaction.In chain initiating stage, if higher temperature contacting metal is (such as equipment surface or corrosion by-product
Thing) generation free radical can be catalyzed, these free radicals are referred to as chain initiator, can accelerate polymerisation process by two ways,
Depending in medium with the presence or absence of oxygen or peroxide.
Dispersing scale inhibitor of the present invention can effectively suppress the dirty thing that radical polymerization and dispersion have been formed, and can make dirt
Thing is evenly dispersed in water phase, so as to avoid dirty thing from separating out in equipment in heat exchanger, the tower etc., reaches the production of extension fixture
The cycle of operation.
The dispersing scale inhibitor of the present invention does not pollute to environment and downstream product, and easy to use, safety and environmental protection.Therefore originally
Invention can bring significant economic benefit and social benefit for acrylonitrile installation.
Specific embodiment
The water soluble disperse antisludging agent of the present invention is described in detail with reference to embodiment, but the protection of the present invention
Scope is not limited to embodiment.
Embodiment 1-8 is the composition and proportioning, comparative example 4-6 and embodiment 9- of production device for acrylic nitrile dispersing scale inhibitor
16 is the using method of comparative example 1-3 and embodiment 1-8 dispersing scale inhibitor.
1g acrylonitrile installations dirt sample is respectively taken, is put in conical tubes after drying grinding, add 100mL deionized waters, then
Uniform shake 2 minutes, is obtained preliminary mixture.The water soluble disperse antisludging agent of different compositions and proportioning is separately added into again above-mentioned
In preliminary mixture, different numberings are indicated respectively, after reaction a period of time, the weight of the remaining acrylonitrile installation dirt sample of measurement.
The composition and proportioning of the water soluble disperse antisludging agent used by comparative example 1-3 and embodiment of the present invention 1-8 is shown in Table 1.
Comparative example 1-3 of table 1 and embodiment 1-8 water soluble disperse antisludging agent composition and proportioning
(data are mass fraction in table)
Note：* the copolymer of multiring aromatic sulfonate and formaldehyde, the multiring aromatic adopted in embodiment 1,4 and 7 is for naphthalene
Base, molecular weight is about 2600000；
The copolymer of * phenylbenzimidazole sulfonic acids salt and formaldehyde, the molecular weight of copolymer is about 2600000 in embodiment 2 and 5；
The copolymer of * * alkyl benzene sulfonates and formaldehyde, the alkane of copolymer in embodiment 3, embodiment 6 and embodiment 8
The carbon number of base phenyl is respectively 12,15 and 18, and molecular weight is about 2600000,2800000 and 3000000；What comparative example 2 was adopted
Alkyl benzene sulfonate is same as Example 3 with the copolymer of formaldehyde.
Comparative example 4
The dispersing scale inhibitor of comparative example 1 is added in above-mentioned preliminary mixture by 100ppm, the bar of time of staying 30min
React under part, reaction measures remaining polymer quality for 0.67g after terminating.
Comparative example 5
The dispersing scale inhibitor of comparative example 2 is added in above-mentioned preliminary mixture by 100ppm, the bar of time of staying 30min
React under part, reaction measures remaining polymer quality for 0.62g after terminating.
Comparative example 6
The dispersing scale inhibitor of comparative example 3 is added in above-mentioned preliminary mixture by 100ppm, the bar of time of staying 30min
React under part, reaction measures remaining polymer quality for 0.64g after terminating.
Embodiment 9
The dispersing scale inhibitor of embodiment 1 is added in above-mentioned preliminary mixture by 100ppm, the bar of time of staying 30min
React under part, reaction measures remaining polymer quality for 0.40g after terminating.
Embodiment 10
The dispersing scale inhibitor of embodiment 2 is added in above-mentioned preliminary mixture by 100ppm, the bar of time of staying 30min
React under part, reaction measures remaining polymer quality for 0.38g after terminating.
Embodiment 11
The dispersing scale inhibitor of embodiment 3 is added in above-mentioned preliminary mixture by 100ppm, the bar of time of staying 30min
React under part, reaction measures remaining polymer quality for 0.16g after terminating.
Embodiment 12
The dispersing scale inhibitor of embodiment 4 is added in above-mentioned preliminary mixture by 5ppm, the condition of time of staying 60min
Lower reaction, reaction measures remaining polymer quality for 0.53g after terminating.
Embodiment 13
The dispersing scale inhibitor of embodiment 5 is added in above-mentioned preliminary mixture by 100ppm, the bar of time of staying 30min
React under part, reaction measures remaining polymer quality for 0.36g after terminating.
Embodiment 14
The dispersing scale inhibitor of embodiment 6 is added in above-mentioned preliminary mixture by 100ppm, the bar of time of staying 30min
React under part, reaction measures remaining polymer quality for 0.18g after terminating.
Embodiment 15
The dispersing scale inhibitor of embodiment 7 is added in above-mentioned preliminary mixture by 100ppm, the bar of time of staying 30min
React under part, reaction measures remaining polymer quality for 0.43g after terminating.
Embodiment 16
The dispersing scale inhibitor of embodiment 8 is added in above-mentioned preliminary mixture by 100ppm, the bar of time of staying 30min
React under part, reaction measures remaining polymer quality for 0.39g after terminating.
Claims (10)
1. a kind of water soluble disperse antisludging agent, including component A, component B and component C, wherein component A are aryl sulfonate and first
The copolymer of aldehyde, component B is one or more in magnesium sulfate, potassium sulfate, magnesium sulfite, and component C is 2,6- di-tert-butyls
One or more in phenol, diethyl hydroxylamine and isopropylhydroxyla；The mass ratio of component A, component B and component C is 10～50：1
～10：1～10, preferably 20～40：4～10：6～10.
2. according to the water soluble disperse antisludging agent described in claim 1, it is characterised in that：Aryl sulfonate in component A, institute
The aryl stated is the group containing one or more aromatic rings.
3. according to the water soluble disperse antisludging agent described in claim 2, it is characterised in that：Described aryl is alkyl phenyl.
4. according to the water soluble disperse antisludging agent described in claim 3, it is characterised in that：In described alkyl phenyl, alkyl
Carbon number is 12～18.
5. according to the water soluble disperse antisludging agent described in claim 1,2,3 or 4, it is characterised in that：The molecular weight of component A is
1000000～6000000, preferred molecular weight is 2000000～4000000, more preferably 2500000～3500000.
6. according to the water soluble disperse antisludging agent described in claim 5, it is characterised in that：The group of the water soluble disperse antisludging agent
Into including：Component A is the polymer of alkyl benzene sulfonate and formaldehyde, and component B is magnesium sulfate, and component C is diethyl hydroxylamine.
7. according to the water soluble dispersing agent described in claim 1 or 6, it is characterised in that：Add in the water soluble dispersing agent molten
Agent, solvent is desalted water.
8. application of a kind of water soluble disperse antisludging agent in production device for acrylic nitrile, including：Claim 1-7 is arbitrary described
Water soluble disperse antisludging agent add production device for acrylic nitrile liquid phase in, addition mass concentration be 5～100ppm, preferably 20
～100ppm.
9. according to the application described in claim 8, it is characterised in that：Described water soluble disperse antisludging agent adds absorber portion, returns
Receive in section, evaporimeter, heat exchanger, reboiler, desorption device and/or its upstream.
10. according to the application described in claim 8 or 9, it is characterised in that：Described water soluble disperse antisludging agent on-line continuous note
Enter.
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| CN201610900091.3A CN106565537B (en) | 2016-10-14 | 2016-10-14 | A kind of water soluble disperse antisludging agent and its application in production device for acrylic nitrile |
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Cited By (4)
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| CN107935886A (en) * | 2017-11-29 | 2018-04-20 | 碳氢联合科技（北京）有限公司 | The preparation and its application of a kind of less toxic high-efficiency polymerization inhibitor of acrylonitrile installation |
| CN108822891A (en) * | 2018-05-17 | 2018-11-16 | 宜兴市星光宝亿化工有限公司 | One kind plus hydrogen antisludging agent and preparation method thereof |
| CN113149862A (en) * | 2020-01-07 | 2021-07-23 | 中国石油天然气股份有限公司 | Scale inhibition and dispersion agent for acrylonitrile device and evaluation method thereof |
| CN114574225A (en) * | 2022-04-12 | 2022-06-03 | 浙江汉景环保化学材料科技有限公司 | Water-soluble dispersant |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107935886A (en) * | 2017-11-29 | 2018-04-20 | 碳氢联合科技（北京）有限公司 | The preparation and its application of a kind of less toxic high-efficiency polymerization inhibitor of acrylonitrile installation |
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| CN108822891A (en) * | 2018-05-17 | 2018-11-16 | 宜兴市星光宝亿化工有限公司 | One kind plus hydrogen antisludging agent and preparation method thereof |
| CN113149862A (en) * | 2020-01-07 | 2021-07-23 | 中国石油天然气股份有限公司 | Scale inhibition and dispersion agent for acrylonitrile device and evaluation method thereof |
| CN113149862B (en) * | 2020-01-07 | 2022-11-04 | 中国石油天然气股份有限公司 | Scale inhibition and dispersion agent for acrylonitrile device and evaluation method thereof |
| CN114574225A (en) * | 2022-04-12 | 2022-06-03 | 浙江汉景环保化学材料科技有限公司 | Water-soluble dispersant |
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| CN106565537B (en) | 2018-10-09 |
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