CN1072255C - Coking and scaling inhibitor and preparation and use thereof - Google Patents
Coking and scaling inhibitor and preparation and use thereof Download PDFInfo
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- CN1072255C CN1072255C CN97121662A CN97121662A CN1072255C CN 1072255 C CN1072255 C CN 1072255C CN 97121662 A CN97121662 A CN 97121662A CN 97121662 A CN97121662 A CN 97121662A CN 1072255 C CN1072255 C CN 1072255C
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Abstract
The present invention relates to a novel coking and scaling inhibitor, a preparation method thereof and the application. The active components of the inhibitor at least contain a novel compound described in the present invention, wherein the compound is formed by linking a long-chain alkane base part, a succinimide or succinamide part, an alkylphenol part, etc. in the form of covalent bonds. The compound has the following structural formula, wherein R is long-chain alkane base with the molecular weight of 200 to 5000 and is preferably polyisobutylene base (disclosed in type (3)); n represents the integral number of 1 to 4 and preferably represents the integral number of 1 to 3; G is alkyl or hydrogen; B is 1 to 3 aromatic hydrocarbon with hydroxy and 1 to 4 hydrocarbyl on a benzene ring; A is hydrocarbyl or hydrogen; X is the integral number of 1 to 5.
Description
The present invention relates to a kind of novel coking and fouling inhibitor that is used for the processing of refining of petroleum and petrochemical complex with equipment, this agent can prevent, delay, remove Jiao of generating in the relevant devices and product in the refining of petroleum and the petrochemical complex course of processing and/or dirty effectively.Because burnt and dirt is difficult to strict the differentiation, so the auxiliary agent that claims to suppress, delay or remove formed dirt or polymkeric substance in the presents is a coking and fouling inhibitor.
As everyone knows, along with oil heaviness and society to being becoming increasingly acute of product demand lighting contradiction, the raw material that is used for the refining of petroleum and the petrochemical complex course of processing also becomes gradually and heavily becomes bad.The stock oil change heavily brings many unthinkable difficulties to refining of petroleum and petrochemical complex processing, some equipment (as pipeline, furnace tubing, reboiler, vapour generator, reactor, interchanger etc.) as devices such as residuum hydrodesulfurization, hydrocracking, catalytic cracking, coking, cracking ethylene preparation, distillations is easy to form coking and incrustation, make heat exchanger heat transfer decrease in efficiency, pipeline stop up the ordinary production that has had a strong impact on full scale plant, and increased fluid-flow pressure drop, energy consumption and maintenance of equipment expense, influenced the device flexibility of operation.These all serious threat at full capacity safe handlings of long period high-level efficiency of production equipment.At present, solve this class problem and mainly contain two kinds of methods: the one, mechanical means promptly changes Machine Design and work flow; The 2nd, chemical process is promptly used coking and fouling inhibitor, will reduce to minimum degree by the detrimentally affect of its generation.For existing apparatus, adopt first method not only to influence ordinary production and invest huge, to new device then because of increase equipment is once invested, maintenance and process cost.Adopting chemical process then is not change technical process, do not influencing under the situation of ordinary production, thereby the chemical assistant of minute quantity directly is injected into the effect of playing inhibition in the working fluid, delaying, remove the coking and fouling generation, and obviously second method is economical and practical.Coking and fouling mechanism mainly contains following several respects: 1, free radical reaction green coke.Compound polymerization reaction take places such as the alkene in the work logistics in the other factors initiation work logistics of the oxygen of trace or energy stimulating activity free radical, aldehyde, ketone, aromatic hydrocarbons, form the material that high polymer and then formation are insoluble to the work logistics, separate out, be deposited on equipment surface.2, on-catalytic green coke.As generation dehydrogenative condensation reaction formation polycondensate, tar droplet or small burnt grains such as high temperature, high pressure, they separate out the work logistics as bigger Jiao's (dirt) of parent generation of coking and fouling under working condition for alkene (especially diolefine) in the work logistics, aromatic hydrocarbons, burnt matter, bituminous matter.3, metal catalytic green coke.When the metal (as iron, copper, nickel etc.) of work logistics or equipment surface exists with the form of ion or title complex, Raolical polymerizable is played katalysis, aggravate Raolical polymerizables such as alkene, aromatic hydrocarbons, aldehyde, ketone, formed the material that is insoluble in working fluid.4, work logistics Central Plains have or accumulating, the course of processing in the inorganic salt (calcium salt, molysite, magnesium salts etc.), catalyst fines, coke powder etc. that form assemble Jiao's (dirt) who forms.5, absorption after-acceleration coagulation effect mutually such as organic polymer and inorganic salt, catalyst fines.
In view of above-mentioned coking and fouling mechanism, require general coking and fouling inhibitor to have following function:
1, has good dispersiveness.It is coalescent agglomerating and deposit to suppress to be suspended in particulate matter in the working fluid.
2, has the radical chain reaction of termination function.Form the natural instincts molecule with living radical, thereby suppress radical chain reaction.
3, the effect that has the inactivate activity metal ion makes the metal ion in the work logistics lose katalysis.
Require coking and fouling inhibitor to have metal-modified function under the situation about 4, having, passivating metallic surfaces or formation one deck molecule protective membrane prevent that Jiao's (dirt) is deposited on the surface, prevents the hardware surface corrosion simultaneously.
5, has satisfactory stability.Homeostasis under working conditions does not produce processes process objectionable impurities.
6, nontoxic.In use, free from environmental pollution to the human body toxicological harmless.
The presentation of results of many scientific experimentations and industrial application: use coking and fouling inhibitor for preventing and alleviating and the equipment coking and fouling of removing refining of petroleum and petrochemical process has played effective function.Therefore traditional inhibitor is to use and disperses the agent (terminator) of dieing out of solubilizing agent and free radical.Oxidation inhibitor such as use such as hindered phenolic and steric hindrance amine are as free radical reaction cessator; Suppress polymkeric substance or the coalescent deposition of inorganics, as oximes and nitrous base class, polyolefinic succinimide acid imide; Prevent metal rise the sulphur of katalysis, Phosphorus metal passivator with and various composite dose.Resistance Jiao (dirt) agent that is used for refining of petroleum and petrochemical process its objective is and prevents that said process equipment from forming coking and fouling.As in the prior art once the someone used polyisobutene succinic diamide (the polyisobutenyl molecular weight is 800-5000) [USP4,835,332 and 4,900,426] (amine is quadrol, Triethylene Diamine etc.) is used to prevent that coking and fouling from playing solubilising and dissemination to incrustation, but this product will decompose when using under greater than 300 ℃ of conditions and lose effectiveness.United States Patent (USP) [USP5,211,834 and 5,211,835] utilized the method for boronation that modification is carried out in this agent afterwards, had increased its heat resistance, but had also introduced the out of use metal boron of some occasion simultaneously.USP (4,578,178) discloses that as coking and fouling inhibitor, result of use is fine with polyisobutene thiophosphate (calcium, barium, magnesium etc.) or polyisobutene thiophosphatephosphorothioate (as season the eleventh of the twelve Earthly Branches tetrol ester etc.).But this product has used this extremely smelly material of thiophosphoric anhydride in process of production, and it is to the toxic effect of human body, and has extremely unpleasant peculiar smell, makes the people unhappy, has also polluted environment simultaneously.[USP4,927,519 and USP4,828,674] disclose the technology of making coking and fouling inhibitor with poly-alkyl monosulfide phenolic compound in addition, and the open thiophenes of Japanese Patent (JP flat 3,115,589) is made the technology of coking inhibitor etc.Ubiquity a common weak point in the prior art, promptly (compound) is difficult to have the comprehensive function that solubilising disperses, stops free radical reaction and passive metal simultaneously in a technology, often need to solve by composite, but carry out the composite so-called multi-functional inhibitor that obtains by the compound of selecting to have difference in functionality, synergy between its difference in functionality is very undesirable, and thermal adaptability is very poor, consumption and price also are not suitable for, and the more important thing is that the burnt descale effect of resistance is not very good.
The objective of the invention is to develop a kind of be used for effective inhibition of the refining of petroleum and the petrochemical complex course of processing, novel cpd and the preparation and the application of removing coking and fouling.
The invention provides a kind of coking and fouling inhibitor, wherein to contain a kind of following structural compounds at least be active princlple, and the structure of this compound is represented with following general formula:
Wherein: R is the polyalkenes alkyl, and molecular weight is 200-5000, preferably polyisobutenyl;
The integer that n represents 1-4 is the integer of 1-3 preferably;
G is alkyl or hydrogen;
B is the 1-3 Polycyclic aromatic hydrocarbons that has hydroxyl and 1-4 alkyl on the phenyl ring;
A is alkyl or hydrogen;
X is the integer of 1-5.
This compound combines in dispersion solubilising function, termination radical chain reaction function, the metal passivation function that coking and fouling suppresses to require in the compound, and this is one of characteristics of the present invention.And the starting material that prepare this compound are easy to get manufacturing convenience.
The invention provides a kind of compound and preparation method who is used for the coking and fouling inhibitor of the refining of petroleum and the petrochemical complex course of processing.A kind of using method that is used for suppressing, delay, remove coking and fouling in refining of petroleum and petrochemical complex course of processing equipment, the pipeline also is provided.This method comprises: the coking and fouling inhibitor that contains the novel cpd of said structure is added in the working fluid that makes the said process coking and fouling.
Above-mentioned described coking and fouling is the dirt that forms by radical chain polymerization reaction, metal ion catalysis polymerization, non-catalytic polymerization etc. in the working fluid of processing units.Novel cpd of the present invention has chain reaction functions such as the radical polymerization of termination as coking and fouling inhibitor, can prevent effectively that these polymkeric substance from further aggregating into macromolecule Jiao (dirt); The dirt that has formed is played solubilising, dissemination; Described metal ion is played passivation; The hardware surface is prevented to corrode function.Therefore novel cpd of the present invention is unusual ideal as effective group of coking and fouling inhibitor.
There is not specific restriction for the handled object of inhibitor of the present invention.In the refining of petroleum and the petrochemical complex course of processing, use this inhibitor and can suppress, remove the dirt that produces owing to the working fluid coking and fouling in the above-mentioned technological process effectively.Be adapted to the equipment of complete processing devices such as hydrocracking, residuum hydrodesulfurization, catalytic cracking, alkylation, coking, distillation, cracking ethylene preparation especially, the equipment such as interchanger, furnace tubing, cracking furnace pipe, vapour generator, reboiler, reactor, separation column that is particularly useful for said apparatus, because of working fluids such as processing, reconstructed coal tar, shale, oil and petroleum fractionss, and the coking and fouling that forms, make aforesaid device be in good working order, can not influence the normal operation of the course of processing because of coking and fouling.
Comprise such as above-mentioned this type of working fluid: crude oil, topped crude, naphtha fraction, gasoline fraction, kerosene(oil)fraction, diesel oil distillate, weight wax oil, long residuum, vacuum residuum, coal tar, shale wet goods.The coking and fouling that coking and fouling that inhibitor of the present invention causes dissolved oxygen and metal ion in the above-mentioned fluid and radical polymerization cause is effective especially.
So-called dissolved oxygen element be meant working fluid contact generation with air in processing, storage and transport process dissolved oxygen with and original oxygen element, these oxygen in processing once again, be heated in the storage and transport process and can trigger free radical reaction, become the parent of coking and fouling, and make it continue to grow up, separate out and be deposited on the wall of equipment, and then influence long period, safety, stable, the running at full capacity of the course of processing.
Novel cpd of the present invention can obtain by following reaction process:
The building-up reactions of novel cpd was divided into for two steps.The first step is that two kinds of raw materials of polyalkenes hydrocarbyl succinimide acid anhydrides and polyamines polyene react under the effect of thinner; Second step was that the reaction product of the first step obtains the novel cpd of the present invention as coking and fouling inhibitor with the phenolic compound reaction under the effect of coupling agent.
The structural formula of above-mentioned polyalkenes hydrocarbyl succinimide acid anhydrides is as follows:
R is for polyalkenes alkyl such as polyalkenes alkyl such as polyvinyl, polypropylene-base, polybutylene-based, polyisobutenyl, polypren, polyhexene bases, polyisobutenyl preferably, and the best 800-5000 of its molecular weight, carbonatoms is selected between 30-200.
Above-mentioned polyamines polyene compound comprises: or derivatives thereof, homologues (as propylene diamine, butanediamine etc.) such as diethylenetriamine, three second tetramines, tetraethylene pentamine.The structure of this compounds is as follows:
A representation hydrocarbyl or hydrogen, but two have at least one to be hydrogen, and n represents the integer of 1-10.
Q represents (CH
2)
m, m represents 1 to 6 integer.
Polyalkenes hydrocarbyl succinimide acid anhydrides and polyamines polyene utilize organic solvent to make thinner, react under greater than 80 ℃ temperature condition, obtain having the polyalkenes hydrocarbon succimide compound of following structure.Above-mentioned organic solvent comprises: benzene, dimethylbenzene, toluylene, petroleum naphtha, diesel oil, mineral oil with and distillate.
Wherein R is the polyalkenes alkyl, and molecular weight is 200-5000, preferably polyisobutenyl;
The integer that n represents 1-4 is the integer of 1-3 preferably;
G is alkyl or hydrogen;
B is the 1-3 Polycyclic aromatic hydrocarbons that has hydroxyl and 1-4 alkyl on the phenyl ring;
A is alkyl or hydrogen;
X is the integer of 1-5.
Obtain polyalkenes hydrocarbyl succinimide acid anhydrides succimide compound by above-mentioned reaction, newly-generated compound reacts under the effect of coupling agent with phenolic compound and just obtains novel cpd of the present invention.Coupling agent comprises: aldehyde compounds such as formaldehyde, acetaldehyde, propionic aldehyde, crotonic aldehyde, phenyl aldehyde, phenylpropyl aldehyde, and its structural formula is as follows:
R representation hydrocarbyl wherein, but the little aldehyde better effects if of molecular weight.
The novel cpd structure that obtains by building-up reactions is as follows:
B represents the 1-3 Polycyclic aromatic hydrocarbons that has hydroxyl and 1-4 alkyl on the phenyl ring, and structure is as follows:
The alkyl with 4-12 carbon atom, cycloalkyl, aralkyl, alkaryl that R representative is connected with carbon atom on the aromatic ring; M represents 1 to 4.
This phenolic compound comprises: phenolic compounds such as phenol, alkylphenol, cycloalkyl phenol, naphthols, filial piety quinone, alkoxy phenol, pyrocatechol or para hydroxybenzene phenol.
Prevent the processing of refining of petroleum and petrochemical complex, the storing method of equipment coking and fouling or the equipment of removing coking and fouling, comprise above-mentioned coking and fouling inhibitor, add to the add-on of 10-1000ppm scope among the working fluid of equipment coking and fouling.
The above-mentioned method that prevents and remove refining of petroleum and petrochemical complex processing with the equipment coking and fouling comprises above-mentioned coking and fouling inhibitor added to equipment has been formed in the working fluid that maybe will form coking and fouling.
The refining of petroleum in above-mentioned and the petrochemical complex course of processing comprise: the course of processing of coal tar, shale oil, oil and fraction thereof, and as catalytic cracking, hydrocracking, hydrofining, heavily residuum hydrodesulfurization, alkylation, coking, cracking ethylene preparation, the distillation course of processing.
Above-mentioned petrochemical complex processing comprises the heavy oil or the light oil cracking system ethene course of processing.
The effect that the present invention reached is that compound of the present invention is used for the shortcoming that coking and fouling inhibitor has overcome the prior art inhibitor, stable performance, can use by potion more, when being used for the refining of petroleum and the petrochemical complex course of processing, product for the course of processing has no adverse effect, the normal running of the not overslaugh course of processing can be guaranteed equipment continuous safe handling of long period under good state of the course of processing.
Characteristics of the present invention:
1, can use by potion more.Novel cpd of the present invention has simultaneously that solubilising disperses, stops free radical reaction, passive metal ion function combines among the compound.
2, applied range.The novel cpd stable performance can be used under the comparatively harsh working condition such as high temperature, low temperature, high pressure.
3, produce starting material and be easy to get, production technique is simple.
4, production technique is had no adverse effects, do not produce any poisonous and harmful substances, do not influence the quality product of the course of processing, the equipment of the course of processing is had no adverse effects.
5, to human body and environmentally friendly.
Accompanying drawing and explanation thereof
Accompanying drawing 1 is the experimental installation schematic flow sheet that the novel coking and fouling inhibitor of the present invention is estimated.1, material tank, 2, raw oil pump, 3, hydrogen, 4, process furnace, 5, compound inlet thermocouple, 6, heat transfer tube, 7, measure the outlet thermocouple, 8, wall temperature thermocouple, 9,10 is gas-liquid separator, 11, gas meter, 12,13, be respectively liquid, atmospheric pressure table, 14, oil plant withdrawing can, 15, reducing valve.
For structure and the preparation method who explains novel cpd of the present invention, lift several examples below, yet these embodiment only are used for structure of setting forth The compounds of this invention and preparation method thereof, can not limit this
Scope of invention.
Embodiment 1
The structure and the preparation method of novel cpd polyisobutene succinimide (quadrol)-2.4-xylenol novel cpd.
1, the structure of novel cpd polyisobutene succinimide (quadrol)-2.4-xylenol
R is polyisobutenyl (molecular weight is between 700-1500).
2, preparation method
The polyisobutylene butanedioic anhydride that in the flask that agitator, thermometer, water trap, dropping funnel are housed, adds 0.1mol, the 100ml xylol, beginning to start agitator stirs, more than the heat temperature raising to 80 ℃, disposable adding anhydrous ethylenediamine 0.15mol controls the stirring velocity of agitator meticulously, elevated temperature to 100～150 ℃, reacted about 4 hours, and in water trap, no longer included moisture and go out, stop heating.Treat to add when temperature is reduced to 92 ℃ 0.1mol 12.4-xylenol, add the 15ml xylol simultaneously, and drip a certain amount of coupling agent, then temperature is raised to 100～165 ℃ and reacted about 3～5 hours, till no longer including moisture to the water trap and going out.Reaction product obtains novel cpd polyisobutene succinimide-2.4 xylenol through being cooled to after room temperature is carried out suction filtration, washing, distillation.
Embodiment 2
The structure and the preparation method of a pair of methoxyl group phenol of novel cpd polyisobutene succinimide (quadrol).
1, the structure of a pair of methoxyl group phenol of novel cpd polyisobutene succinimide (quadrol)
R is polyisobutenyl (molecular weight is between 700-1500).
2, preparation method
Repeat the preparation method of embodiment 1, difference is the synthesis material 2.4-xylenol among the embodiment 1 is changed into oxygen base phenol.
Embodiment 3
Novel cpd laurylene base succinic diamide (quadrol)-2.4-xylenol structure and preparation method.
1, novel cpd laurylene base succinic diamide (quadrol)-2.4-xylenol structure
R is the laurylene base.
2, preparation method
Repeat embodiment 1 preparation method, difference is to change the raw material polyisobutenyl succinic anhydride among the embodiment 1 into the dodecenylsuccinic acid acid anhydride, and add-on is 0.2ml, and quadrol is 0.2ml, 2.4-dimethyl phenol 0.2ml.
Embodiment 4
The structure and the preparation method of novel cpd polyisobutene succinimide (quadrol)-nonyl phenol.
1, the structure of novel cpd polyisobutene succinimide-nonyl phenol
R is between the 700-1500 for the polyisobutenyl molecular weight.
2, preparation method
Repeat the preparation method of embodiment 1, difference is in changing the synthesis material 2.4-xylenol among the embodiment 1 into nonyl phenol.
For inhibition, dispersion, the scavenging(action) of novel cpd of the present invention to coking and fouling in the refining of petroleum and the petrochemical complex course of processing is described, we utilize traditional heat transfer theory to set up the coking and fouling inhibitor that the small test device forms above-mentioned novel cpd to have carried out actual evaluation.This method is utilized heat transfer principle, and fluid forms dirt through heating tube, thereby influences heat transfer efficiency.Small test device schema is seen Fig. 1.
During the experiment beginning, no coking and fouling in the heating tube, the entire thermal resistance minimum, the heat transfer efficiency height, the temperature that fluid flows out heating tube is the highest.Along with the dirt that carries out in the heating tube of testing increases, thermal resistance increases heat transfer efficiency and descends, and the temperature that fluid flows out heating tube reduces.The temperature difference had just appearred in the temperature of fluid outflow heating tube when therefore experiment began and finishes in the regular hour, and the many more temperature difference of dirt are big more.If add coking and fouling inhibitor in fluid, then the formation of dirt is inhibited in the heating tube, and the dirt that therefore is deposited on the heating tube wall will reduce, and heat exchange efficiency has just improved, and temperature head diminishes.Can illustrate that with the temperature extent coking and fouling inhibitor suppresses the effect of coking and fouling.Usually represent that with the burnt descaling rate of resistance coking and fouling inhibitor suppresses the effect of coking and fouling.
T
0, t
0On-test and the heat transfer tube temperature out when finishing when not adding agent.
T, t are for adding after the agent on-test and heat transfer tube temperature out when finishing.
Estimating with stock oil is the extremely strong vacuum residuum of coking behavior, and its character is listed in table-1.Suppress and remove the results are shown in table-2, showing-3 of coking and fouling.
Table-1 is estimated and is used feedstock property
| A | B | C | D | |
| 20 ℃ of g/cm of density 3 | 0.9498 | 0.9130 | 0.9424 | 0.9727 |
| Carbon residue m% | 10.24 | 10.84 | 13.3 | 16.37 |
| Elementary composition m% C H S N | 85.49 12.59 0.39 0.6842 | 86.17 12.44 0.369 0.3927 | 85.62 11.78 1.13 0.53 | 86.77 11.28 0.88 0.577 |
| Metal ppm Ni V | 63.7 1.46 | 22.7 0.90 | 10.3 7.0 | 24.3 2.8 |
| Group composition m% stable hydrocarbon aromatic hydrocarbons colloid | 36.07 36.06 27.85 | 56.56 22.27 20.7 | 36.9 35.4 27.7 | 21.9 40.0 38.02 |
Table-2 coking and fouling inhibitors suppress the coking and fouling result
| Add dosage ppm | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | |||||
| ΔT℃ | Efficient % | ΔT℃ | Efficient % | ΔT℃ | Efficient % | ΔT℃ | Efficient % | ||
| A-1 | 100 | 10 | 58.3 | 9 | 62.5 | 9 | 62.5 | 6 | 75.0 |
| A-2 | 150 | 8 | 66.6 | 8 | 66.7 | 7 | 70.8 | 5 | 79.2 |
| A-3 | 200 | 6 | 75.0 | 6 | 75.0 | 5 | 79.2 | 3 | 87.5 |
| A-4 | 300 | 4 | 83.3 | 3 | 87.5 | 3 | 87.5 | 2 | 91.7 |
| B-1 | 200 | 5 | 75.0 | 5 | 75.0 | 5 | 75.0 | 4 | 80.0 |
| C-1 | 200 | 4 | 80.0 | 4 | 80.0 | 4 | 80.0 | 2 | 89.5 |
| D-1 | 200 | 5 | 73.7 | 4 | 78.9 | 4 | 78.9 | 3 | 86.4 |
Table-3 coking and fouling inhibitors are removed the coking and fouling result
| Raw material | Dosage, ppm | Time, hrs | Δt℃ | Δt/ΔT,％ |
| A | 50 | 24 | 0.5 | 2.08 |
| A | 50 | 72 | 2 | 8.3 |
| A | 100 | 24 | 2 | 8.3 |
| A | 200 | 24 | 3 | 12.5 |
| A | 400 | 24 | 5 | 20.8 |
| A | 400 | 48 | 7 | 29.1 |
| B | 200 | 24 | 4 | 20.0 |
| C | 200 | 24 | 4 | 21.0 |
Temperature lift-off value when Δ t is scale removal on-test and end.
Temperature head when Δ T begins with end for not adding the agent blank test.
Claims (9)
1. coking and fouling inhibitor, wherein containing a kind of general structure at least is active princlple suc as formula the compound of (1):
Wherein: R is the polyalkenes alkyl, and molecular weight is 200-5000;
N is the integer of 1-4;
G is alkyl or hydrogen;
B is the 1-3 Polycyclic aromatic hydrocarbons that has hydroxyl and 1-4 alkyl on the phenyl ring;
A is alkyl or hydrogen;
X is the integer of 1-5.
2. according to the described coking and fouling inhibitor of claim 1, it is characterized in that: R is a polyisobutenyl, and n is the integer of 1-3.
3. the preparation method of the described coking and fouling inhibitor of claim 1 comprises the steps:
(ⅰ) polyalkenes hydrocarbyl succinimide acid anhydrides and polyamines polyene generate polyalkenes hydrocarbon succimide compound under the effect of thinner;
Wherein the general structure of polyalkenes hydrocarbyl succinimide acid anhydrides is as the formula (3):
R represents the polyalkenes alkyl; The polyamines polyene general structure is as the formula (4):
A representation hydrocarbyl or hydrogen, but two have at least one to be hydrogen;
N represents the integer of 1-10;
Q represents (CH
2)
m, m represents the integer of 1-6;
(ⅱ) above-mentioned succimide compound obtains general formula (1) compound with the phenolic compound reaction under the effect of coupling agent, and wherein coupling agent is an aldehyde compound.
4. according to the preparation method of the described coking and fouling inhibitor of claim 3, wherein coupling agent is formaldehyde, acetaldehyde, propionic aldehyde, crotonic aldehyde, phenyl aldehyde or phenylpropyl aldehyde.
5. according to the preparation method of the described coking and fouling inhibitor of claim 3, wherein R is polyvinyl, polypropylene-base, polybutylene-based, polyisobutenyl, polypren or polyhexene base.
6 preparation methods according to the described coking and fouling inhibitor of claim 3, wherein polyamines polyene is diethylenetriamine, triethylene tetramine, tetraethylene pentamine or derivatives thereof, belongs to thing together.
7. according to the preparation method of the described coking and fouling inhibitor of claim 3, wherein phenolic compound is phenol, alkylphenol, cycloalkyl phenol, naphthols, filial piety quinone, alkoxy phenol, pyrocatechol or para hydroxybenzene phenol.
8. the described coking and fouling inhibitor of claim 1 is to add the 10-1000PPm coking and fouling inhibitor in working fluid in the processing of refining of petroleum and petrochemical complex, accumulating with the application in the equipment, its application method.
9. according to the application of the described coking and fouling inhibitor of claim 8, wherein the course of processing is catalytic cracking, hydrocracking, hydrofining, heavily residuum hydrodesulfurization, alkylation, coking, cracking ethylene preparation or the distillation course of processing.
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| CN97121662A CN1072255C (en) | 1997-11-24 | 1997-11-24 | Coking and scaling inhibitor and preparation and use thereof |
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| CNB001280783A Division CN1152943C (en) | 2000-11-29 | 2000-11-29 | Coking and scaling inhibitor and its preparation and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1090668C (en) * | 1999-09-10 | 2002-09-11 | 中国石油化工集团公司北京化工研究院 | Method for inhibiting ethylene cracking device from coking |
| CN1309810C (en) * | 2005-07-26 | 2007-04-11 | 张喜文 | Coke inhibitor of high-temperature refining equipment |
| CN101161785B (en) * | 2006-10-12 | 2011-06-15 | 中国石油化工股份有限公司 | Method for suppressing coking and carbonizing for hydrocarbons steam cracking unit |
| CN102559237A (en) * | 2012-01-29 | 2012-07-11 | 何巨堂 | Coal-based oil distillation method using thermal condensation inhibited oil |
| KR102404839B1 (en) | 2016-08-25 | 2022-06-07 | 비엘 테크놀러지스 인크. | Reduce contamination of hydrocarbon oils |
| CN112250602B (en) * | 2020-10-16 | 2021-11-09 | 中国石油大学(北京) | Inhibitor for inhibiting petroleum sulfonate sulfonation reaction coking and application thereof |
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| US3585123A (en) * | 1968-11-18 | 1971-06-15 | Petrolite Corp | Acylated hydrocarbon succinates and uses thereof |
| US4927519A (en) * | 1988-04-04 | 1990-05-22 | Betz Laboratories, Inc. | Method for controlling fouling deposit formation in a liquid hydrocarbonaceous medium using multifunctional antifoulant compositions |
| US5171421A (en) * | 1991-09-09 | 1992-12-15 | Betz Laboratories, Inc. | Method for controlling fouling deposit formation in a liquid hydrocarbonaceous medium |
-
1997
- 1997-11-24 CN CN97121662A patent/CN1072255C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3585123A (en) * | 1968-11-18 | 1971-06-15 | Petrolite Corp | Acylated hydrocarbon succinates and uses thereof |
| US4927519A (en) * | 1988-04-04 | 1990-05-22 | Betz Laboratories, Inc. | Method for controlling fouling deposit formation in a liquid hydrocarbonaceous medium using multifunctional antifoulant compositions |
| US5171421A (en) * | 1991-09-09 | 1992-12-15 | Betz Laboratories, Inc. | Method for controlling fouling deposit formation in a liquid hydrocarbonaceous medium |
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|---|---|
| CN1218095A (en) | 1999-06-02 |
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