CN113235094A - Special metal corrosion inhibitor for alkylation device D212 tower and preparation method thereof - Google Patents
Special metal corrosion inhibitor for alkylation device D212 tower and preparation method thereof Download PDFInfo
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- CN113235094A CN113235094A CN202110503427.3A CN202110503427A CN113235094A CN 113235094 A CN113235094 A CN 113235094A CN 202110503427 A CN202110503427 A CN 202110503427A CN 113235094 A CN113235094 A CN 113235094A
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- 238000005260 corrosion Methods 0.000 title claims abstract description 57
- 230000007797 corrosion Effects 0.000 title claims abstract description 55
- 239000003112 inhibitor Substances 0.000 title claims abstract description 38
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 36
- 239000002184 metal Substances 0.000 title claims abstract description 36
- 230000029936 alkylation Effects 0.000 title claims abstract description 15
- 238000005804 alkylation reaction Methods 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 26
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims abstract description 22
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000008367 deionised water Substances 0.000 claims abstract description 13
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 13
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims abstract description 11
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000001099 ammonium carbonate Substances 0.000 claims abstract description 11
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims abstract description 11
- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 claims abstract description 11
- 235000010234 sodium benzoate Nutrition 0.000 claims abstract description 11
- 239000004299 sodium benzoate Substances 0.000 claims abstract description 11
- 239000011684 sodium molybdate Substances 0.000 claims abstract description 11
- 235000015393 sodium molybdate Nutrition 0.000 claims abstract description 11
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 claims abstract description 11
- 235000010288 sodium nitrite Nutrition 0.000 claims abstract description 11
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims abstract description 10
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 10
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims abstract description 10
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 10
- 239000000126 substance Substances 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 210000003298 dental enamel Anatomy 0.000 claims abstract description 3
- 238000001914 filtration Methods 0.000 claims abstract description 3
- 238000004806 packaging method and process Methods 0.000 claims abstract description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 2
- 229910021529 ammonia Inorganic materials 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 10
- 230000004580 weight loss Effects 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000005536 corrosion prevention Methods 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000004880 explosion Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 241000282412 Homo Species 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- JAWMENYCRQKKJY-UHFFFAOYSA-N [3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-ylmethyl)-1-oxa-2,8-diazaspiro[4.5]dec-2-en-8-yl]-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]methanone Chemical compound N1N=NC=2CN(CCC=21)CC1=NOC2(C1)CCN(CC2)C(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F JAWMENYCRQKKJY-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 235000012501 ammonium carbonate Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009429 distress Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 125000005842 heteroatom Chemical group 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/04—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in markedly acid liquids
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/02—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in air or gases by adding vapour phase inhibitors
Abstract
The invention discloses a special metal corrosion inhibitor for an alkylation device D212 tower, which comprises the following components: ammonium bicarbonate, sodium benzoate, sodium nitrite, sodium molybdate, urotropine, ammonia water, ethylenediamine, ethanolamine, ethanol and deionized water, wherein the metal corrosion inhibitor comprises 5-31% of ammonium bicarbonate, 10-16% of sodium benzoate, 0-3% of sodium nitrite, 12-15% of sodium molybdate, 13% of urotropine, 0-22.5% of ammonia water, 12.5-22.5% of ethylenediamine, 1.6% of ethanolamine, 7.8-14.3% of ethanol and 6.6-10.1% of deionized water, and the preparation method thereof is characterized in that deionized water is weighed firstly and added into a clean enamel kettle; sequentially adding ammonium bicarbonate, sodium benzoate, sodium nitrite, sodium molybdate, urotropine, ammonia water, ethanolamine and ethanol while stirring; finally adding ethylenediamine; stirring for 2 hours after the addition is finished, and checking that no insoluble substances exist; and (5) filtering and packaging. Compared with the similar products purchased outside under the same conditions, the invention has the advantages that the weight loss amount only accounts for one tenth of the weight loss amount of the similar products in the market, and the anticorrosion effect is obvious. And the price is nearly ten times different.
Description
Technical Field
The invention relates to the technical field of metal corrosion inhibitors, in particular to a special metal corrosion inhibitor for an alkylation device D212 tower and a preparation method thereof.
Background
Thousands of years ago, humans have begun to use metals. The use of metals has greatly advanced society and the progress of human history. To date, metals are even more inseparable from human life. However, neither metals nor alloys inevitably face corrosion, a spontaneous phenomenon that naturally occurs in the natural environment and is irreversible.
In the chemical industry, the corrosion losses are particularly severe due to the presence of strongly corrosive media such as various acids, bases, salts and organic solvents and the increasing requirement for the production process to be carried out under conditions of high temperature and pressure and continuous operation. According to statistics, the total corrosion loss of the industry in China accounts for 3.6 percent of the total value of the national production. 300 million tons of steel can be corroded every year. Seriously affecting production and increasing unsafe factors. From the accident analysis of chemical enterprises, about 75% of explosion accidents are related to equipment corrosion. In 2013, major accidents of leakage and explosion of 11 and 22 middle petrochemical east China oil pipelines occur in Qingdao city of Shandong province. The direct reason is that the pipeline at the intersection of the oil pipeline and the drainage underdrain is corroded and thinned, and the pipeline is broken to cause explosion. Causing 62 people to be in distress and 136 people to be injured, and the direct economic loss reaches 7.5 billion yuan. The loss caused by corrosion in China in 2014 is about two trillion RMB which is 4-6 times of various natural disasters, and is calculated according to 3 percent of GDP in the current year. The problem of corrosion has become a significant risk that seriously affects production life and safety issues.
The problem of metal corrosion prevention has long attracted wide attention, and the adopted methods and means are various. The main methods are the "sacrificial" anode method; changing the composition of the alloy and adopting corrosion-resistant metal or alloy, etc. These methods can be carried out to some extent
However, these methods all suffer from problems of high cost, difficult operation, and small application range.
The metal corrosion inhibitor is a substance which is used on the surface of metal and has a protective effect, and belongs to the technical field of special fine chemicals and corrosion prevention. The addition of trace or small amount of chemical substances can obviously reduce the corrosion rate of the metal material in the medium to zero, and simultaneously can keep the original physical and mechanical properties of the metal material unchanged.
Compared with other anticorrosion technologies, the addition of the corrosion inhibitor has some remarkable advantages, such as no need of special equipment, simple control, low price, simple and convenient operation and the like. Considering the good corrosion prevention effect and the good economic benefit of the corrosion inhibitor, the corrosion inhibitor is widely applied to the fields of petroleum exploitation and processing, acid cleaning, industrial circulating water systems and the like.
Through the development of many years, the synthesized and utilized corrosion inhibitors are various, most of the corrosion inhibitors contain heteroatoms such as N, O, S, P and the like or aromatic rings, and all of the compounds have lone pair electrons and are easy to interact with metal, so that a protective barrier is formed between the surface of the metal and alloy and a corrosive medium, and the purpose of retarding the corrosion of the metal is achieved.
The metal corrosion inhibitor has the advantages of wide application, low consumption, low cost, low investment, simple operation, small corrosion to metal matrix, good protection effect and the like, so the research and the use of the corrosion inhibitor become one of the research hotspots in the field of home and abroad corrosion prevention.
The alkylation device D212 of our company has special medium, the material runs at high speed after being washed by alkaline washing water, and the possibility of acid corrosion and cavitation exists in metal equipment; for safe production, the loss is reduced. We have developed specific metal corrosion inhibitors. The safety of the tower is protected by utilizing the principles of neutralization and adsorption.
The similar corrosion inhibitor products are available on the market, but the price is high, the effect is poor, and the main products are polluted.
Disclosure of Invention
The invention aims to provide a special metal corrosion inhibitor for an alkylation device D212 tower and a preparation method thereof, which solve the problem of product pollution, and the corrosion inhibitor has high polarity, is miscible with water and does not pollute hydrocarbon materials; the anti-corrosion effect is improved, and the production cost is reduced. The corrosion inhibitor has the advantages of 5 times of the corrosion inhibiting effect of similar products in the market and one tenth of the production cost of the similar products in the market, and solves the problems of high price, poor effect and pollution to main products of similar corrosion inhibitors in the market.
In order to achieve the purpose, the invention provides the following technical scheme:
a special metal corrosion inhibitor for an alkylation device D212 tower comprises: ammonium bicarbonate, sodium benzoate, sodium nitrite, sodium molybdate, urotropine, ammonia water, ethylenediamine, ethanolamine, ethanol and deionized water, wherein the metal corrosion inhibitor comprises 5-31% of ammonium bicarbonate, 10-16% of sodium benzoate, 0-3% of sodium nitrite, 12-15% of sodium molybdate, 13% of urotropine, 0-22.5% of ammonia water, 12.5-22.5% of ethylenediamine, 1.6% of ethanolamine, 7.8-14.3% of ethanol and 6.6-10.1% of deionized water.
Preferably, the ethanol purity is 95%.
Preferably, the ammonium carbonate is preferably 21%, the sodium benzoate is preferably 16%, the sodium nitrite is preferably 3.0%, the sodium molybdate is preferably 12%, the urotropine is preferably 13%, the ammonia water is preferably 6.5%, the ethylenediamine is preferably 12.5%, the ethanolamine is preferably 1.6%, the ethanol is preferably 7.8%, and the deionized water is preferably 6.6%.
A special metal corrosion inhibitor for an alkylation device D212 tower and a preparation method thereof comprise the following steps:
s1, weighing deionized water, and adding the deionized water into a clean enamel kettle;
s2, sequentially adding ammonium bicarbonate, sodium benzoate, sodium nitrite, sodium molybdate, urotropine, ammonia water, ethanolamine and ethanol while stirring;
s3, finally adding ethylenediamine;
s4, stirring for 2 hours after the addition is finished, and checking that no insoluble substances exist;
s5, filtering and packaging.
Preferably, the PH of the solution in S4 is 10.
Compared with the prior art, the invention has the beneficial effects that: the water solubility is good, the water-soluble polyvinyl alcohol can be mutually dissolved with water in any ratio, and no pollution is caused to products; the production price is low, and is one tenth of that of the similar products purchased outside; the effect is good, and the anti-corrosion effect is 5 times of that of the similar products purchased outside; wide application range, and can prevent acid corrosion and cavitation corrosion.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The unit of each ingredient value is g
TABLE 1 metallic corrosion inhibitor composition specific for "alkylation unit D212 column" of examples 1-8
| Examples | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Ammonium bicarbonate | 21％ | 11％ | 5％ | 31％ | 21％ | 15％ | 21％ | 21％ |
| Sodium benzoate | 16％ | 15％ | 16％ | 16％ | 16％ | 16％ | 16％ | 10％ |
| Sodium nitrite | 3.0％ | 3.0％ | 3.0％ | 3.0％ | 0％ | 3.0％ | 3.0％ | 3.0％ |
| Sodium molybdate | 12％ | 13％ | 12％ | 12％ | 15％ | 12％ | 12％ | 12％ |
| Urotropine | 13％ | 13％ | 13％ | 13％ | 13％ | 13％ | 13％ | 13％ |
| Aqueous ammonia | 6.5％ | 16.5％ | 22.5％ | 0％ | 6.5％ | 6.5％ | 0％ | 6.5％ |
| Ethylene diamine | 12.5％ | 12.5％ | 12.5％ | 12.5％ | 12.5％ | 18.5％ | 12.5％ | 22.5％ |
| Ethanolamine | 1.6％ | 1.6％ | 1.6％ | 1.6％ | 1.6％ | 1.6％ | 1.6％ | 1.6％ |
| Ethanol (95%) | 7.8％ | 7.8％ | 7.8％ | 7.8％ | 7.8％ | 7.8％ | 14.3％ | 7.8％ |
| Deionized water | 6.6％ | 6.6％ | 6.6％ | 10.1％ | 6.6％ | 6.6％ | 6.6％ | 6.6％ |
The verification method for each of the corrosion inhibitors described in examples 1-8 above is as follows:
the corrosion inhibitor is mixed with water according to the mass ratio of 1: 500, and 30ml of the solution was taken and put into 1000ml of a 1% hydrochloric acid solution and stirred uniformly. The hanging pieces are weighed and placed after being processed according to requirements, and are kept for 4 hours at the temperature of 80 ℃. And after the completion, the hanging piece is cleaned and weighed. And calculating a weight loss value, wherein the weight loss value/the original weight of the hanging piece is 100 percent, namely the weight loss rate. And the corrosion condition of the surface of the hanging piece is checked under the microscope of 1000 times, and whether the hole corrosion phenomenon exists or not is checked.
Example 1-8 "alkylation unit D212 tower" coupon corrosion protection effect of special metal corrosion inhibitor:
the No. 1 formula has the best antiseptic effect, and the cost of the formula is almost the same as that of other formulas.
Comparing the composition No. 1 with the purchased samples, and testing the original data of the test hanging pieces:
compared with the similar products purchased from other companies under the same conditions, the corrosion inhibitor 1# composition of the invention has the weight loss accounting for only one tenth of the weight loss of the similar products in the market, and has obvious corrosion prevention effect. And the price is nearly ten times different.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (5)
1. A special metal corrosion inhibitor for an alkylation device D212 tower comprises: the metal corrosion inhibitor is characterized in that the metal corrosion inhibitor comprises 5-31% of ammonium bicarbonate, 10-16% of sodium benzoate, 0-3% of sodium nitrite, 12-15% of sodium molybdate, 13% of urotropine, 0-22.5% of ammonia water, 12.5-22.5% of ethylenediamine, 1.6% of ethanolamine, 7.8-14.3% of ethanol and 6.6-10.1% of deionized water.
2. The special metal corrosion inhibitor for the alkylation plant D212 tower according to claim 1, wherein the special metal corrosion inhibitor comprises: the purity of the ethanol is 95%.
3. The special metal corrosion inhibitor for the alkylation plant D212 tower according to claim 1, wherein the special metal corrosion inhibitor comprises: ammonium bicarbonate is preferably 21%, sodium benzoate is preferably 16%, sodium nitrite is preferably 3.0%, sodium molybdate is preferably 12%, urotropine is preferably 13%, ammonia is preferably 6.5%, ethylenediamine is preferably 12.5%, ethanolamine is preferably 1.6%, ethanol is preferably 7.8%, and deionized water is preferably 6.6%.
4. A special metal corrosion inhibitor for an alkylation device D212 tower and a preparation method thereof are characterized by comprising the following steps:
s1, weighing deionized water, and adding the deionized water into a clean enamel kettle;
s2, sequentially adding ammonium bicarbonate, sodium benzoate, sodium nitrite, sodium molybdate, urotropine, ammonia water, ethanolamine and ethanol while stirring;
s3, finally adding ethylenediamine;
s4, stirring for 2 hours after the addition is finished, and checking that no insoluble substances exist;
s5, filtering and packaging.
5. The special metal corrosion inhibitor for the alkylation unit D212 tower and the preparation method thereof according to claim 4, wherein the special metal corrosion inhibitor comprises the following components in percentage by weight: the PH of the solution in S4 was 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110503427.3A CN113235094A (en) | 2021-05-10 | 2021-05-10 | Special metal corrosion inhibitor for alkylation device D212 tower and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110503427.3A CN113235094A (en) | 2021-05-10 | 2021-05-10 | Special metal corrosion inhibitor for alkylation device D212 tower and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115976521A (en) * | 2022-12-30 | 2023-04-18 | 广东腐蚀科学与技术创新研究院 | Composite cooling water corrosion inhibitor and application thereof |
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2021
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115976521A (en) * | 2022-12-30 | 2023-04-18 | 广东腐蚀科学与技术创新研究院 | Composite cooling water corrosion inhibitor and application thereof |
| CN115976521B (en) * | 2022-12-30 | 2023-10-20 | 广东腐蚀科学与技术创新研究院 | Composite cooling water corrosion inhibitor and application thereof |
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