CN101280429B - Composite type sodium polysulfide corrosion inhibitor and preparation thereof - Google Patents
Composite type sodium polysulfide corrosion inhibitor and preparation thereof Download PDFInfo
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- CN101280429B CN101280429B CN2007100213385A CN200710021338A CN101280429B CN 101280429 B CN101280429 B CN 101280429B CN 2007100213385 A CN2007100213385 A CN 2007100213385A CN 200710021338 A CN200710021338 A CN 200710021338A CN 101280429 B CN101280429 B CN 101280429B
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Abstract
The invention relates to compound type sodium polysulphide corrosion inhibitor, which is suitable for the hydrogenation cracking reaction effluent air cooler. The compound type sodium polysulphide corrosion inhibitor is formed by combining sodium polysulphide, benzotriazole and organic amine film forming agent, wherein, the organic amine film forming agent is the combination of one or more of sodium molybdate, sodium chromate and zinc sulfate. The product integrates complexing, dispersing, corrosion prevention and film forming into a whole, has good synergistic inhibition effect under the low temperature and the high temperature and has good corrosion inhibition on the corrosion of the sulfide and the prussiate, the corrosion rate is reduced obviously, the temperature at the air-cooled water outlet opening can be guaranteed effective not to rise, the temperature of the tube bundle is even, the current bias phenomenon can not be caused, and the protective film formed on the surface of the equipment is steadier.
Description
Technical field
The present invention relates to a kind of composite type sodium polysulfide corrosion inhibitor, be useful in the hydrocracking reaction effluent air cooler.
Background technology
There are corrosive mediums such as a large amount of hydrogen sulfide, ammonia and a small amount of prussiate, muriate in the hydrocracking reaction effluent air cooler process-stream, under the situation that water exists, form multiple corrosion system, corrosive medium prussiate especially wherein, it also has promoter action to other corrosion reactions.In order to suppress the corrosion of prussiate to equipment; U.S. CHEVRON research company has developed a kind of antiseptic corrosion inhibitor; promptly in the corrosive medium that prussiate exists, add sodium polysulphide; allow sodium polysulphide react with wall or tube wall earlier; generate the fine and close protective membrane of FeS from the teeth outwards; thereby equipment or pipeline are played a protective role; sodium polysulphide generates many ammonium sulfides with ammonia and the reaction of other ammoniac compounds more then; generate thiocyanate with the prussiate reaction simultaneously; reduce fouling and the lime set deposition of NH4HS, NH4Cl, suppress corrosion.But in hydrogenation high pressure air cooling; sodium polysulphide is met air and is easily decomposited elemental sulfur; make the place's fouling of high pressure water injection pump mechanical sealing have a strong impact on going into operation the life-span of high pressure water-injection pump, storage tank and pipeline; the Iron sulfuret protective membrane that is generated is more open, the protection tube bank is failed to reach the preservative activity of expection.
Chinese patent application 02117840.2 discloses a kind of " special corrosion and scale inhibitor for surface evaporation air cooling ", by zinc sulfate, vinylformic acid-acrylic acid esters co-polymer, hydroxyl 1-1-ethylidene diphosphonic acid, benzotriazole is composite constitutes, it is suitable for the circulating water system of high rigidity, high basicity, at high temperature and having in the presence of the prussiate, preservative activity is also undesirable.
Summary of the invention
The present invention is just in order to overcome above-mentioned deficiency, a kind of composite type sodium polysulfide corrosion inhibitor is provided, it is at low temperature, high temperature and have in the presence of the prussiate, all there are good corrosion-resisting function and erosion rate slow, main innovation is that with sodium polysulphide, benzotriazole be major ingredient, it is composite to be equipped with the organic amine membrane-forming agent, synergy by storeroom, than thin material, corrosion mitigating effect has obtained significantly improving and the defective when having overcome pure the use, specifically implement like this: composite type sodium polysulfide corrosion inhibitor is characterized in that the weight proportion of each component is:
Sodium polysulphide sulphur index is 1-4.5 20-70%
Benzotriazole 30-65%
Organic amine membrane-forming agent 0-20%
Wherein, the organic amine membrane-forming agent is the one or more combination of Sodium orthomolybdate, Sodium chromate, zinc sulfate.
The host sodium polysulphide, anticorrosive very effective to sulfide and prussiate, add benzotriazole, because of containing the N atom in the benzotriazole molecule, the avidity that easily forms the Fe-N key and show with the metallic surface, and can form firmly protective membrane closely in the metallic surface, these compact protective film are difficult to be washed away by high speed flow, can prevent effectively that lastingly metal is corroded, collaborative preservative activity is played in tube bank to metal material; The organic amine membrane-forming agent can form preservative protective film in tube bank, the increase of chromium ion can increase the stability of passive film; Molybdenum ion can reduce the destruction of chlorion; Zine ion can quicken the filming function of other inhibiter, can keep the film forming weather resistance of these inhibiter institute shapes simultaneously again.
Composite type sodium polysulfide corrosion inhibitor, the each component weight proportion is preferably:
Sodium polysulphide sulphur index is 1-4.5 40-50%
Benzotriazole 40-50%
Organic amine membrane-forming agent 0-20%
Wherein, the organic amine membrane-forming agent is the combination of a kind of of Sodium orthomolybdate or Sodium orthomolybdate and Sodium chromate, zinc sulfate or two kinds.
The manufacture method of this composite type sodium polysulfide corrosion inhibitor is, feeds nitrogen by proportioning in the container of sodium polysulphide is housed, and is warming up to 80-90 ℃, adds all the other each components and mix under the nitrogen envelope.
This composite type sodium polysulfide corrosion inhibitor, the collection complexing disperses, anticorrosion, film forming is in one, its complexing dissemination can be disperseed established dirty thing, avoid the tired coagulation of dirty thing long-pending, anticorrosion component can provide protection to tube bank, avoid restraining suffering new corrosion, good synergistic slow corrosion effect is all arranged under low temperature and high temperature, compare with each single agent, it is good to sulfide and prussiate corrosive corrosion mitigating effect, erosion rate obviously reduces, and disperses dirty thing deposition, particularly under the uneven situation of water filling, Dian Keng appears washing away, pitting corrosion and the corrosion of dirty thing, can guarantee effectively that the air cooling water outlet temperature does not rise, the tube bank temperature is even, does not cause the bias current phenomenon; In addition, it is more stable at the protective membrane that equipment surface forms.
Embodiment
Embodiment 1, and composite type sodium polysulfide corrosion inhibitor is put into the sulphur index and be 20 parts of the sodium polysulphide of 1-4.5 in container, feed nitrogen, is warming up to 80-90 ℃, adds 65 parts of benzotriazoles under the nitrogen envelope, and Sodium orthomolybdate mixes for 15 parts.
Embodiment 2, and composite type sodium polysulfide corrosion inhibitor is put into the sulphur index and be 30 parts of the sodium polysulphide of 1-4.5 in container, feed nitrogen, is warming up to 80-90 ℃, adds 40 parts of benzotriazoles under the nitrogen envelope, 10 parts of Sodium orthomolybdates, and Sodium chromate mixes for 10 parts.
Embodiment 3, and composite type sodium polysulfide corrosion inhibitor is put into the sulphur index and be 70 parts of the sodium polysulphide of 1-4.5 in container, feed nitrogen, is warming up to 80-90 ℃, adds 30 parts of benzotriazoles under the nitrogen envelope.
Embodiment 4, and composite type sodium polysulfide corrosion inhibitor is put into the sulphur index and be 40 parts of the sodium polysulphide of 1-4.5 in container, feed nitrogen, is warming up to 80-90 ℃, adds 50 parts of benzotriazoles under the nitrogen envelope, and zinc sulfate mixes for 10 parts.
Embodiment 5, and composite type sodium polysulfide corrosion inhibitor is put into the sulphur index and be 50 parts of the sodium polysulphide of 1-4.5 in container, feed nitrogen, is warming up to 80-90 ℃, adds 45 parts of benzotriazoles under the nitrogen envelope, and Sodium orthomolybdate mixes for 5 parts.
Embodiment 6, and composite type sodium polysulfide corrosion inhibitor is put into the sulphur index and be 40 parts of the sodium polysulphide of 1-4.5 in container, feed nitrogen, is warming up to 80-90 ℃, adds 40 parts of benzotriazoles under the nitrogen envelope, and 10 parts of Sodium orthomolybdates, 5 parts of Sodium chromates, zinc sulfate mix for 5 parts.
Claims (3)
1. composite type sodium polysulfide corrosion inhibitor is characterized in that the weight proportion of each component is:
Sodium polysulphide sulphur index is 1-4.5 20-70%
Benzotriazole 30-65%
Organic amine membrane-forming agent 0-20%
Wherein, the organic amine membrane-forming agent is the one or more combination of Sodium orthomolybdate, Sodium chromate, zinc sulfate.
2. composite type sodium polysulfide corrosion inhibitor according to claim 1 is characterized in that the weight proportion of each component is:
Many sulphur of sodium polysulphide index is 1-4.5 40-50%
Benzotriazole 40-50%
Organic amine membrane-forming agent 0-20%
Wherein, the organic amine membrane-forming agent is the combination of a kind of of Sodium orthomolybdate or Sodium orthomolybdate and Sodium chromate, zinc sulfate or two kinds.
3. the manufacture method of composite type sodium polysulfide corrosion inhibitor is characterized in that feeding nitrogen by claim 1,2 described proportionings in the container of sodium polysulphide is housed, and is warming up to 80-90 ℃, adds all the other each components and mix under the nitrogen envelope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100213385A CN101280429B (en) | 2007-04-02 | 2007-04-02 | Composite type sodium polysulfide corrosion inhibitor and preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100213385A CN101280429B (en) | 2007-04-02 | 2007-04-02 | Composite type sodium polysulfide corrosion inhibitor and preparation thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN101280429A CN101280429A (en) | 2008-10-08 |
| CN101280429B true CN101280429B (en) | 2011-04-13 |
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| CN2007100213385A Expired - Fee Related CN101280429B (en) | 2007-04-02 | 2007-04-02 | Composite type sodium polysulfide corrosion inhibitor and preparation thereof |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102304716A (en) * | 2011-08-30 | 2012-01-04 | 吴江市精工铝字制造厂 | Corrosion inhibitor |
| CN109487272B (en) * | 2019-01-07 | 2020-09-01 | 安徽卓远化工科技有限公司 | Production method of high-pressure air-cooling corrosion inhibitor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0102712A1 (en) * | 1982-07-14 | 1984-03-14 | Exxon Research And Engineering Company | A process for preventing corrosion in alkaline systems |
| US5976415A (en) * | 1997-10-30 | 1999-11-02 | H.B. Fuller Licensing & Financing Inc. | Corrosion-inhibiting polysulfide sealants |
| CN1459424A (en) * | 2002-05-23 | 2003-12-03 | 中国石油天然气集团公司 | Special corrosion and scale inhibitor for surface evaporation air cooling |
-
2007
- 2007-04-02 CN CN2007100213385A patent/CN101280429B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0102712A1 (en) * | 1982-07-14 | 1984-03-14 | Exxon Research And Engineering Company | A process for preventing corrosion in alkaline systems |
| US5976415A (en) * | 1997-10-30 | 1999-11-02 | H.B. Fuller Licensing & Financing Inc. | Corrosion-inhibiting polysulfide sealants |
| CN1459424A (en) * | 2002-05-23 | 2003-12-03 | 中国石油天然气集团公司 | Special corrosion and scale inhibitor for surface evaporation air cooling |
Non-Patent Citations (1)
| Title |
|---|
| 任晓光等.《苯并三唑对碳钢的缓蚀性能》.《石油炼制与化工》.2007,第38卷(第2期),65-68. * |
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| CN101280429A (en) | 2008-10-08 |
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Owner name: YIXING XINGGUANG BAOYI CHEMICAL CO., LTD. Free format text: FORMER NAME: YIXING XINGGUANG CHEMICAL INDUSTRY FACTORY |
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Address after: 214266, Xinzhuang Industrial Concentration Zone 1, Jiangsu, Yixing Patentee after: YIXING CITY XINGGUANG BAOYI CHEMICAL CO., LTD. Address before: 214266, Xinzhuang Industrial Concentration Zone 1, Jiangsu, Yixing Patentee before: Yixing Xingguang Chemical Industry Factory |
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