CN103305274B - Making method of corrosion and scale inhibitor - Google Patents
Making method of corrosion and scale inhibitor Download PDFInfo
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- CN103305274B CN103305274B CN201210063624.9A CN201210063624A CN103305274B CN 103305274 B CN103305274 B CN 103305274B CN 201210063624 A CN201210063624 A CN 201210063624A CN 103305274 B CN103305274 B CN 103305274B
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Abstract
The invention discloses a making method of a corrosion and scale inhibitor. The method is characterized in that fatty acid based imidazoline amide is taken as the basis to synthesize water soluble imidazoline amide, which is compounded with an organic phosphonic acid scale inhibitor to obtain the corrosion and scale inhibitor used for a hydrocracker's high pressure air cooler. By mass, the corrosion and scale inhibitor comprises: 8%-30% of fatty acid based imidazoline amide, 2%-10% of the organic phosphonic acid scale inhibitor, 0-20% of ethanol, and 40%-90% of water. The organic phosphonic acid and polycarboxylic acid scale inhibitors contained in the scale inhibitor are widely applied in industrial water treatment, and can damage the conditions for generation of scaling sediments or aggregation of hydrocarbon molecules. And the high efficiency corrosion inhibitor represented by imidazoline and sulfonate polymers contain polar groups and can form a compact and firm protective film on the surface of metal equipment, thus reaching the purposes of preventing corrosion and inhibiting scaling.
Description
[technical field]
The present invention relates to a kind of manufacture method being applicable to the corrosion inhibiting and descaling agent of high-pressure air cooler, particularly relate to a kind of manufacture method of corrosion inhibiting and descaling agent of the high-pressure air cooler for hydroeracking unit.
[background technology]
Crude oil and products from crude oil become topmost power wheel drive energy derive, extensively become world's every field energy sources, long-term a large amount of exploitation in oil field, oil property is deteriorated gradually, sulphur content growth in oil component and the plant retrofit of production technique device, cause constantly exposing equipment safety operation in oil refining production process, corrosion prevention, the problem such as production assurance and safety and environmental protection, hydrocracking is a kind of common mode of processing crude oil, the remarkable mode of its treating processes is high temperature, high pressure, face hydrogen inflammable, explosive and operate under poisonous medium environment, the S gone out in hydro carbons while that processing object being refining target product, N, the undesirable components such as O, therefore a large amount of H2S is had, HCl, NH3, the material compositions such as HCN, these materials are met water reaction and are generated NH4Cl, the salts such as NH4HS, H2S wherein, HCl and ammonium salt very large to the corrosion harmfulness of equipment, uncontrollable strong exothermal reaction is also had to occur, in addition along with the increase of sulphur content in processing crude oil causes sulphur content in hydrogenating materials to increase to some extent, it is another reason of corrosion.In oil refining hydrocracking process process, high-pressure air cooler is in H2S-H2O-HCl corrosive environment, is easy to underdeposit corrosion and galvanic corrosion occur, and its corrosion prevention problem has become the primary condition ensureing the normal production run of process unit.Therefore study On The High-pressure Air Cooler of Hydrocracking Unit corrosion and protection question significant.
The corrosion solving On The High-pressure Air Cooler of Hydrocracking Unit adopts following way usually: 1. in the water filling of air cooler upstream, in case ammonium salt sedimentation, and water injection rate should make NH4HS content in high-pressure separator water be no more than 8; 2. for the air cooler of multi-disc tube bank composition, air cooler inlet streams should take the distribution means of symmetrical balance to carry out pipe arrangement layout, in order to fluid distributed uniform; 3. the Kp value in combined feed total feed must be less than 0.5; 4. reduce as far as possible prussiate, oxygen etc. other can promote corrode medium content; 5. to annotate inhibiter, carry out corrosion protection of equipment from technological angle.
Adopt the means of adding Petroleum Refining Additives, to the raising of oil quality, the steady running of device and constantly strict environmental requirement, have great significance.But refinery, for pursuing long-term operation, is challenged to equipment performance and protected working, also more and more higher to the requirement of Petroleum Refining Additives.Except considering its preservative effect, be also noted that the toxic side effect to course of processing catalyzer below, and each auxiliary agent is all only applicable to certain condition, also under any condition, all keeps its effect without any a kind of inhibiter at present.Simultaneously along with the development of production technique, Simplified flowsheet, easy operation, take into account anti-corrosion, scale-inhibiting performance, day by day becomes an urgent demand from production department.
[summary of the invention]
The present invention solves the problem and provides a kind of can reaching and prevent corrosion object, the generation that can destroy structure deposition or aggregation conditions, reaches scale inhibition, inhibition double effects.
The technical scheme that the present invention solves the problem is: a kind of manufacture method of corrosion inhibiting and descaling agent, it is characterized in that, based on fatty acid based imidazolines acid amides, synthesizing water-solubility imidazoline amide, composite with organic phosphine acids Scale inhibitors, as the corrosion inhibiting and descaling agent for On The High-pressure Air Cooler of Hydrocracking Unit, wherein by percentage to the quality, it consists of: fatty acid based imidazolines acid amides 8%-30%, organic phosphine acids Scale inhibitors 2%-10%, ethanol 0-20%, water 40%-90%.
Described fatty acid based imidazolines acid amides is synthesized by polyethylene polyamine, vegetable fatty acid and organic carboxyl acid dehydrating condensation, and by percentage to the quality, it consists of: polyethylene polyamine 20%-50%, vegetable fatty acid 10%-30%, and organic carboxyl acid is 20%-50%.Wherein lipid acid is oleic acid, dimeracid or naphthenic acid; Polyethylene polyamine is diethylenetriamine, triethylene tetramine, tetraethylene pentamine, five ethene hexamines, six ethene seven amine, seven ethene eight amine, eight ethene nine amine or nine ethene ten amine; Organic carboxyl acid is oxyacetic acid, lactic acid, oxysuccinic acid or tartrate.
Described organic phosphine acids Scale inhibitors is Amino Trimethylene Phosphonic Acid, hydroxy ethylene diphosphonic acid, quadrol methylene phosphonic acid, diethylenetriamine penta, 2-phosphonobutane-1,2,4-tricarboxylic acid, 2-hydroxyethylidene diphosphonic acid guanidine-acetic acid, hexanediamine tetramethylene phosphonic acid or two hexamethylene triamine pentamethylene phosphonic acids.
The manufacture method of described corrosion inhibiting and descaling agent, it is characterized in that manufacturing process is as follows: join in there-necked flask by polyethylene polyamine and vegetable fatty acid, stirring under a reduced pressure and be warming up to 120 degree of-150 degree reaction 3-5 hour, being then warming up to 150 degree of-200 degree insulation 4-8 little of dewatering completely.Be cooled to 100 degree of-130 degree, add organic carboxyl acid, be warming up to 150-200 degree degree reaction 2-5 hour.Reaction solution is down to room temperature, adds water, ethanol and organic phosphine acids Scale inhibitors allotment pH value to 7.5-9.0, obtains water soluble corrosion inhibition Scale inhibitors.
The invention has the beneficial effects as follows: the present invention is for one is based on fatty acid-based Orazamide, composite with organic phosphine acids Scale inhibitors, as the corrosion inhibiting and descaling agent for On The High-pressure Air Cooler of Hydrocracking Unit, the organic phosphine acids that this Scale inhibitors contains and polycarboxylic acid Scale inhibitors, then be widely used in Treatment of Industrial Water, the generation of scale deposition thing or the condition of hydrocarbon molecule gathering can be destroyed, and imidazolines and Sulfonates polymer are the high-efficient corrosion inhibitor of representative, the protective membrane of compact and firm can be formed again on hardware surface containing polarity group, reach and prevent corrosion, the object of scale inhibition.
[embodiment]
Clearly understand that in order to make object of the present invention, technical scheme and advantage following examples are further elaborated to the present invention.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment 1:
110g diethylenetriamine and 200g oleic acid are joined in there-necked flask, stirs under a reduced pressure and be warming up to 150 degree and react 5 hours, be then warming up to 200 degree and be incubated 4 little of dewatering completely.Be cooled to 130 degree, add 70g lactic acid, be warming up to 150 degree and react 2 hours.Reaction solution is down to room temperature, add water and hydroxy ethylene diphosphonic acid allotment pH value to 8, obtain water soluble corrosion inhibition Scale inhibitors.
Embodiment 1:
110g diethylenetriamine and 200g oleic acid are joined in there-necked flask, stirs under a reduced pressure and be warming up to 180 degree and react 4.5 hours, be then warming up to 200 degree and be incubated 4 little of dewatering completely.Be cooled to 130 degree, add 70g lactic acid, be warming up to 150 degree and react 2 hours.Reaction solution is down to room temperature, obtains water-soluble imidazoline amide.Add 900g water and 10g hydroxy ethylene diphosphonic acid allotment pH value to 7.5, obtain water soluble corrosion inhibition Scale inhibitors.
Embodiment 2:
Join in there-necked flask by 120g triethylene tetramine and 220g naphthenic acid, stir under a reduced pressure and be warming up to 200 degree and react 3 hours, then 200 degree of insulations 4 are little of dewatering completely.Be cooled to 130 degree, add 80g lactic acid, be warming up to 150 degree and react 2 hours.Reaction solution is down to room temperature, obtains water-soluble imidazoline amide.Add 900g water and 10g hydroxy ethylene diphosphonic acid allotment pH value to 7.5, obtain water soluble corrosion inhibition Scale inhibitors.
Embodiment 3:
110g diethylenetriamine and 200g oleic acid are joined in there-necked flask, stirs under a reduced pressure and be warming up to 150 degree and react 3 hours, be then warming up to 200 degree and be incubated 4 little of dewatering completely.Be cooled to 130 degree, add 70g oxyacetic acid, be warming up to 150 degree and react 2 hours.Reaction solution is down to room temperature, obtains water-soluble imidazoline amide.Add 900g water and 8g quadrol methylene phosphonic acid allotment pH value to 8.0, obtain water soluble corrosion inhibition Scale inhibitors.
Claims (2)
1. the manufacture method of a corrosion inhibiting and descaling agent, it is characterized in that, based on fatty acid based imidazolines acid amides, synthesizing water-solubility imidazoline amide, composite with organic phosphine acids Scale inhibitors, as the corrosion inhibiting and descaling agent for On The High-pressure Air Cooler of Hydrocracking Unit, wherein by percentage to the quality, it consists of: fatty acid based imidazolines acid amides 8%-30%, organic phosphine acids Scale inhibitors 2%-10%, ethanol 0-20%, water 40%-90%; Described fatty acid based imidazolines acid amides is synthesized by polyethylene polyamine, vegetable fatty acid and organic carboxyl acid dehydrating condensation, and by percentage to the quality, it consists of: polyethylene polyamine 20%-50%, vegetable fatty acid 10%-30%, and organic carboxyl acid is 20%-50%; Wherein lipid acid is oleic acid, dimeracid or naphthenic acid; Polyethylene polyamine is diethylenetriamine, triethylene tetramine, tetraethylene pentamine, five ethene hexamines, six ethene seven amine, seven ethene eight amine, eight ethene nine amine or nine ethene ten amine; Organic carboxyl acid is oxyacetic acid, lactic acid, oxysuccinic acid or tartrate; Polyethylene polyamine and vegetable fatty acid being joined in there-necked flask, stirs under a reduced pressure and be warming up to 120 degree of-150 degree reaction 3-5 hour, being then warming up to 150 degree of-200 degree insulation 4-8 little of dewatering completely; Be cooled to 100 degree of-130 degree, add organic carboxyl acid, be warming up to 150-200 degree degree reaction 2-5 hour; Reaction solution is down to room temperature, adds water or ethanol, and organic phosphine acids Scale inhibitors allotment pH value is to 7.5-9.0, obtains water soluble corrosion inhibition Scale inhibitors.
2. the manufacture method of corrosion inhibiting and descaling agent according to claim 1, it is characterized in that, described organic phosphine acids Scale inhibitors is Amino Trimethylene Phosphonic Acid, hydroxy ethylene diphosphonic acid, quadrol methylene phosphonic acid, diethylenetriamine penta, 2-phosphonobutane-1,2,4-tricarboxylic acid, 2-hydroxyethylidene diphosphonic acid guanidine-acetic acid, hexanediamine tetramethylene phosphonic acid or two hexamethylene triamine pentamethylene phosphonic acids.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104370819B (en) * | 2014-10-22 | 2016-06-08 | 金浦新材料股份有限公司 | The preparation method of a kind of water-soluble imidazoline amide corrosion inhibitor and application thereof |
| CN105712504B (en) * | 2014-12-02 | 2018-08-10 | 中国石油天然气股份有限公司 | A kind of corrosion inhibiting and descaling agent for acidic high-temperature gas water, preparation method and application |
| CN105670691A (en) * | 2016-02-29 | 2016-06-15 | 中国石油化工股份有限公司 | Highly effective corrosion inhibitor for furfural refining apparatuses and preparation method |
| CN107418641B (en) * | 2017-07-28 | 2020-04-03 | 陕西日新石油化工有限公司 | High-temperature-resistant desulfurizer for oil and gas fields and preparation method thereof |
| CN108003258B (en) * | 2017-11-24 | 2020-09-18 | 浙江杭化科技股份有限公司 | Aryl imidazoline modified polyisobutene amine dispersant |
| CN111760588A (en) * | 2020-07-10 | 2020-10-13 | 山西腾茂科技有限公司 | Yield-increasing propylene catalytic cracking auxiliary agent |
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| CN101020847A (en) * | 2007-03-13 | 2007-08-22 | 甘肃利新化工助剂有限公司 | Filming corrosion inhibitor for hydrorefining apparatus |
| CN101724464A (en) * | 2009-12-29 | 2010-06-09 | 南京石油化工股份有限公司 | Preparation method of oil soluble hydrogenation corrosion inhibitor for hydrogenation and reforming device |
| CN101818350A (en) * | 2010-04-29 | 2010-09-01 | 同济大学 | Anti-oil well metal equipment corrosion inhibitor, preparation method and using method thereof |
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Patent Citations (3)
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| CN101020847A (en) * | 2007-03-13 | 2007-08-22 | 甘肃利新化工助剂有限公司 | Filming corrosion inhibitor for hydrorefining apparatus |
| CN101724464A (en) * | 2009-12-29 | 2010-06-09 | 南京石油化工股份有限公司 | Preparation method of oil soluble hydrogenation corrosion inhibitor for hydrogenation and reforming device |
| CN101818350A (en) * | 2010-04-29 | 2010-09-01 | 同济大学 | Anti-oil well metal equipment corrosion inhibitor, preparation method and using method thereof |
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