CN106757046B - Corrosion inhibitor for sulfur-containing moisture conveying pipeline and preparation method thereof - Google Patents
Corrosion inhibitor for sulfur-containing moisture conveying pipeline and preparation method thereof Download PDFInfo
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- CN106757046B CN106757046B CN201611246473.5A CN201611246473A CN106757046B CN 106757046 B CN106757046 B CN 106757046B CN 201611246473 A CN201611246473 A CN 201611246473A CN 106757046 B CN106757046 B CN 106757046B
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- 238000005260 corrosion Methods 0.000 title claims abstract description 71
- 230000007797 corrosion Effects 0.000 title claims abstract description 71
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 23
- 239000011593 sulfur Substances 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000003112 inhibitor Substances 0.000 title abstract description 10
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000013067 intermediate product Substances 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000005639 Lauric acid Substances 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 14
- ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims description 31
- 238000006555 catalytic reaction Methods 0.000 claims description 12
- 239000003513 alkali Substances 0.000 claims description 9
- 239000003054 catalyst Substances 0.000 claims description 9
- FDRCDNZGSXJAFP-UHFFFAOYSA-M sodium chloroacetate Chemical compound [Na+].[O-]C(=O)CCl FDRCDNZGSXJAFP-UHFFFAOYSA-M 0.000 claims description 9
- 238000004821 distillation Methods 0.000 claims description 6
- 150000001412 amines Chemical class 0.000 claims description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 2
- 239000005977 Ethylene Substances 0.000 claims description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- 238000001704 evaporation Methods 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 238000010025 steaming Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- NHFDKKSSQWCEES-UHFFFAOYSA-N dihydrogen phosphate;tris(2-hydroxyethyl)azanium Chemical compound OP(O)(O)=O.OCCN(CCO)CCO NHFDKKSSQWCEES-UHFFFAOYSA-N 0.000 abstract description 2
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 abstract 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 abstract 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 12
- 229910052799 carbon Inorganic materials 0.000 description 7
- -1 Imidazoline sulphur phosphor Chemical compound 0.000 description 6
- 230000005764 inhibitory process Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 230000005518 electrochemistry Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000000116 mitigating effect Effects 0.000 description 4
- 230000002195 synergetic effect Effects 0.000 description 4
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 3
- 235000017858 Laurus nobilis Nutrition 0.000 description 3
- 235000005212 Terminalia tomentosa Nutrition 0.000 description 3
- 244000125380 Terminalia tomentosa Species 0.000 description 3
- 239000001110 calcium chloride Substances 0.000 description 3
- 229910001628 calcium chloride Inorganic materials 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 241000521257 Hydrops Species 0.000 description 2
- 206010030113 Oedema Diseases 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- YSMRWXYRXBRSND-UHFFFAOYSA-N TOTP Chemical compound CC1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)C)OC1=CC=CC=C1C YSMRWXYRXBRSND-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 235000019441 ethanol Nutrition 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- UOCLRXFKRLRMKV-UHFFFAOYSA-N trolnitrate phosphate Chemical compound OP(O)(O)=O.OP(O)(O)=O.[O-][N+](=O)OCCN(CCO[N+]([O-])=O)CCO[N+]([O-])=O UOCLRXFKRLRMKV-UHFFFAOYSA-N 0.000 description 2
- BJLRVFDWAOVFCI-UHFFFAOYSA-N 1h-imidazole;quinoline Chemical compound C1=CNC=N1.N1=CC=CC2=CC=CC=C21 BJLRVFDWAOVFCI-UHFFFAOYSA-N 0.000 description 1
- 241001614291 Anoplistes Species 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000009096 changqing Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- ZZVUWRFHKOJYTH-UHFFFAOYSA-N diphenhydramine Chemical compound C=1C=CC=CC=1C(OCCN(C)C)C1=CC=CC=C1 ZZVUWRFHKOJYTH-UHFFFAOYSA-N 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 150000002461 imidazolidines Chemical class 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000002343 natural gas well Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 230000002633 protecting effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000001179 sorption measurement 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
- C23F11/02—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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses a corrosion inhibitor for a sulfur-containing moisture conveying pipeline and a preparation method thereof, wherein the corrosion inhibitor comprises the following preparation raw materials in parts by mass: 35-50 parts of an intermediate product, 3.2-4.8 parts of thiourea, 1.2-2.4 parts of triethanolamine phosphate, 1.2-2.4 parts of phosphorous acid and 40-60 parts of water, wherein the preparation raw materials of the intermediate product comprise lauric acid and tetraethylenepentamine, and the mass ratio of the lauric acid to the tetraethylenepentamine is 1: (1-2). The corrosion inhibitor prepared by the invention has the advantages of small dosage, long effective period, low cost and the like, and can effectively control the corrosion of pipelines and ensure the safe production when being applied to the actual production.
Description
Technical field
The invention belongs to the metallic material corrosion in natural gas well surface duct internal corrosion environment and field is protected, is specifically related to
And a kind of corrosion inhibiter and preparation method thereof for sulfur-bearing moisture conveyance conduit.
Background technique
The corrodible property of Changqing Gas Fields ground gas transmission line is micro- containing H2S, low carbonated has in output water different dense
The HCO of degree3 -、Cl-Ion etc., and the pH value variation of corrosive medium is greatly.The surface line for being served in the corrosive environment is all made of 20#
Ordinary carbon steel, part pipeline corrosion is relatively serious, needs to fill corrosion inhibiter in production process to control pipeline corrosion.
The corrosion inhibiter research of anti-natural gas surface line corrosion is relatively fewer at present, anti-for natural gas conveying pipeline inner wall
Rotten corrosion inhibiter is mainly based on the molten corrosion inhibiter of oil, such corrosion inhibiter absorption film-forming is preferable, and specific gravity is generally 0.85~0.98g/
cm3, it is suitable for simple high containing CO2The corrosive environment of corrosion, inhibition is imitated under pipeline hydrops water content and all higher situation of liquid level
Fruit is poor, limited for corrosive environment protecting effect at High water cut high salinity pipeline hydrops.It is applicable in so targetedly developing
In sulfur-bearing moisture delivery pipe to corrosion inhibiter have great significance.
Summary of the invention
The purpose of the present invention is to provide a kind of corrosion inhibiter and preparation method thereof for sulfur-bearing moisture conveyance conduit, with gram
Take the problems of the above-mentioned prior art, corrosion inhibiter prepared by the present invention has dosage small, and validity period is long, it is at low cost the advantages that,
Using pipeline corrosion can be effectively controlled in actual production, guarantee safety in production.
In order to achieve the above objectives, the present invention adopts the following technical scheme that：
A kind of corrosion inhibiter for sulfur-bearing moisture conveyance conduit, in terms of mass fraction, preparing raw material includes：35~50 parts
Intermediate product, 3.2~4.8 parts of thiocarbamides, 1.2~2.4 parts of nitranols, 1.2~2.4 parts of phosphorous acid and 40~60 parts
The raw material for preparing of water, the intermediate product includes lauric acid and tetraethylenepentamine, and the mass ratio of lauric acid and tetraethylenepentamine
It is 1：(1~2).
Further, in terms of mass fraction, preparing raw material includes：42 parts of intermediate products, 4 parts of thiocarbamides, 2 parts of tricresyl phosphate second
The raw material for preparing of hydramine, 2 parts of phosphorous acid and 50 parts of water, the intermediate product includes lauric acid and tetraethylenepentamine, and laurel
Acid and the mass ratio of tetraethylenepentamine are 1：1.1.
Further, the preparation method of the intermediate product is：It is carried out after reactor is added in lauric acid, tetraethylenepentamine
Distillation reaction, then catalysis reaction is carried out using sodium chloroacetate/alkali as catalyst, it is cooled to room temperature up to intermediate product.
Further, the distillation reaction is specially：3h is reacted at 150 ± 5 DEG C, then heats to 230 DEG C of reactions
2h。
Further, the catalysis, which is reacted, is specially：1~1.5h is stirred to react under the conditions of 180 ± 5 DEG C.
Further, it is 3.5-6.5, H that the corrosion inhibiter, which is suitable for pH value,2S Han Liang≤100mg/m3、CO2Han Liang≤1%,
Corrosive environment of the salinity in 50~100g/L.
A kind of preparation method of the corrosion inhibiter for sulfur-bearing moisture conveyance conduit, includes the following steps：
Step 1：By lauric acid and tetraethylenepentamine according to 1：The mass ratio of (1~2) distill instead after reactor is added
It answers, then carries out catalysis reaction using sodium chloroacetate/alkali as catalyst, then cool to room temperature up to intermediate product；
Step 2：35~50 parts of intermediate products are reacted at a temperature of 150 ± 5 DEG C with 3.2~4.8 parts of thiocarbamides, are added
Then 1.2~2.4 parts of nitranols and 1.2~2.4 parts of phosphorous acid phosphatization 1-2h are cooled to 50 ± 5 DEG C, be added 40~60
Part water, which dissolves and is cooled to room temperature, obtains corrosion inhibiter for sulfur-bearing moisture conveyance conduit.
Further, distillation reaction is specially in step 1：3h is reacted at 150 ± 5 DEG C, then heats to 230 DEG C instead
Answer 2h.
Further, catalysis reaction is specially in step 1：1~1.5h is stirred to react under the conditions of 180 ± 5 DEG C.
Further, it is 3.5-6.5, H that prepared corrosion inhibiter, which is suitable for pH value,2S Han Liang≤100mg/m3、CO2Han Liang≤
1%, corrosive environment of the salinity in 50~100g/L.
Compared with prior art, the invention has the following beneficial technical effects：
Corrosion inhibiter of the invention is a kind of water-soluble chemical agent, specific gravity 1.02g/cm3Left and right is produced in high salinity
Corrosion mitigating effect is good under water and all higher situation of liquid level.It is low containing H in moisture conveyance conduit2S (﹤ 100mg/m3), it is low to contain CO2
Under the corrosive environment of (﹤ 1%), concentrated water (50~100g/L), dosage is 30~50ppm, and electrochemistry corrosion inhibition rate exists
85% or more, weightless corrosion inhibition rate is less than professional standard value 0.076mm/a, corrosion inhibiter tool in 80% or more or absolutely corrosion rate
Have dosage small, validity period is long, it is at low cost the advantages that, using can be effectively controlled pipeline corrosion in actual production, guarantee that safety is raw
It produces.
The method of the present invention makes itself and Fe by introducing hybridized atom sulphur and phosphorous polar group2+Complexing is converted to insoluble
The iron sulfide protective film of property；Whole using naphthenic base space arrangement, the characteristics of the excellent adsorption of metal surface, design has in more absorption
The imidazolidine derivatives corrosion inhibiter host compound of the heart increases its protected area, reduces inhibiter consumption；Phosphorous is added simultaneously
Acid improves the water solubility and dispersibility of Sulphur-containing Imidazole quinoline using phosphatization method of modifying；In addition, a small amount of tricresyl phosphate ethyl alcohol is added
Amine further strengthens the synergistic effect between alcohol amine groups and phosphate radical, since its branch is very more, has certainly in film breakage
The ability of reparation, the condensate/crude oil synergistic effect finally contained using natural gas line itself, to realize the width of corrosion inhibiter
Adaptability and efficient requirement.
Detailed description of the invention
Fig. 1 is that corrosion coupon microscopic appearance before corrosion inhibiter of the present invention is added；
Fig. 2 is that corrosion inhibiter post-etching lacing film microscopic appearance of the present invention is added.
Specific embodiment
Embodiments of the present invention are described in further detail below：
A kind of corrosion inhibiter for sulfur-bearing moisture conveyance conduit, in terms of mass fraction, preparing raw material includes：35~50 parts
Intermediate product, 3.2~4.8 parts of thiocarbamides, 1.2~2.4 parts of nitranols, 1.2~2.4 parts of phosphorous acid and 40~60 parts
The raw material for preparing of water, the intermediate product includes lauric acid and tetraethylenepentamine, and the mass ratio of lauric acid and tetraethylenepentamine
It is 1：(1~2), more optimized, preparing raw material includes：42 parts of intermediate products, 4 parts of thiocarbamides, 2 parts of nitranols, 2 parts of Asias
The raw material for preparing of phosphoric acid and 50 parts of water, the intermediate product includes lauric acid and tetraethylenepentamine, and lauric acid and four ethylene
The mass ratio of five amine is 1：1.1.
The preparation method of intermediate product is：Lauric acid, tetraethylenepentamine reaction mass are added after reactor 150 ± 5
3h is reacted at DEG C, then heats to 230 DEG C of reaction 2h, then using sodium chloroacetate/alkali as catalyst, stir under the conditions of 180 ± 5 DEG C
It mixes and carries out catalysis 1~1.5h of reaction, be cooled to room temperature up to intermediate product.
A kind of preparation method of the corrosion inhibiter for sulfur-bearing moisture conveyance conduit, includes the following steps：
Step 1：By lauric acid and tetraethylenepentamine according to 1：The mass ratio of (1~2) is added after reactor at 150 ± 5 DEG C
Lower reaction 3h then heats to 230 DEG C of reaction 2h, then using sodium chloroacetate/alkali as catalyst, stirs under the conditions of 180 ± 5 DEG C
Catalysis 1~1.5h of reaction is carried out, is then cooled to room temperature up to intermediate product；
Step 2：35~50 parts of intermediate products are reacted at a temperature of 150 ± 5 DEG C with 3.2~4.8 parts of thiocarbamides, are added
Then 1.2~2.4 parts of nitranols and 1.2~2.4 parts of phosphorous acid phosphatization 1-2h are cooled to 50 ± 5 DEG C, be added 40~60
Part water, which dissolves and is cooled to room temperature, obtains corrosion inhibiter for sulfur-bearing moisture conveyance conduit.
It is 3.5-6.5, H that corrosion inhibiter provided by the invention, which is suitable for pH value,2S Han Liang≤100mg/m3、CO2Han Liang≤1%,
Corrosive environment of the salinity in 50~100g/L.
Below with reference to embodiment, the invention will be described in further detail：
Embodiment 1
On the three-necked flask of installation water segregator, reflux condensing tube and blender, by 1：1.05 mass ratio by lauric acid,
After reactor is added in tetraethylenepentamine reaction mass, 3h is reacted at (150 ± 5) DEG C, is brought rapidly up to 230 DEG C and is reacted
2h constantly has water to distillate in reaction process, after high temperature dehydration, then using sodium chloroacetate/alkali as catalyst, in 180 ± 5 DEG C of conditions
Lower stirring carries out catalysis reaction 1h, is cooled to room temperature to obtain intermediate product.
It is respectively that 35 parts of intermediate products with 4.8 parts of thiocarbamides react 3h in (150 ± 5) DEG C by mass parts, is subsequently to added into 2.4 parts
Nitranol and 1.2 parts of phosphorous acid phosphatization 1h, after be cooled to (50 ± 5) DEG C and be added in 60 parts of water and sufficiently dissolve, it is cooling
Imidazoline sulphur phosphor corrosion inhibitor is obtained to room temperature.Using the influence of normal octane simulation condensate, in corrosive medium (50mg/m3H2S、
0.5%CO2, 60g/L CaCl2) in be added 30ppm imidazoline sulphur phosphor corrosion inhibitor, add 1% normal octane of liquid quality fraction,
It being added before and after normal octane, electrochemistry corrosion inhibition rate is increased to 87.8% by 76.9%, the promotion of 1% normal octane corrosion mitigating effect is compounded,
Show that the corrosion inhibiter and gas well condensate can produce good synergistic effect.
Embodiment 2
On the three-necked flask of installation water segregator, reflux condensing tube and blender, by 1：1.2 mass ratio is by laurel
After reactor is added in acid, tetraethylenepentamine reaction mass, react 4h at (150 ± 5) DEG C, be brought rapidly up to 230 DEG C carry out it is anti-
2h is answered, constantly has water to distillate in reaction process, after high temperature dehydration, then using sodium chloroacetate/alkali as catalyst, in 180 ± 5 DEG C of items
Stirring carries out catalysis reaction 1.5h under part, is cooled to room temperature to obtain intermediate product.
It is respectively that 50 parts of intermediate products with 3.2 parts of thiocarbamides react 4h in (150 ± 5) DEG C by mass parts, is subsequently to added into 1.2 parts
Nitranol and 2.4 parts of phosphorous acid phosphatization 2h, after be cooled to (50 ± 5) DEG C and be added in 40 parts of water and sufficiently dissolve, cool down
It is added after to (50 ± 5) DEG C in 50 parts of water and sufficiently dissolves, be cooled to room temperature and obtain imidazoline sulphur phosphor corrosion inhibitor.Utilize normal octane
The influence for simulating condensate, in corrosive medium (50mg/m3H2S, 0.5%CO2, 60g/L CaCl2) in be added 30ppm imidazoline
Sulphur phosphor corrosion inhibitor adds 1% normal octane of liquid quality fraction, is added before and after normal octane, and electrochemistry corrosion inhibition rate is mentioned by 79.2%
Height compounds the promotion of 1% normal octane corrosion mitigating effect to 89.8%, shows that the corrosion inhibiter and gas well condensate can produce good association
Same effect.
Embodiment 3
On the three-necked flask of installation water segregator, reflux condensing tube and blender, by 1：1.1 mass ratio is by laurel
After reactor is added in acid, tetraethylenepentamine reaction mass, react 5h at (150 ± 5) DEG C, be brought rapidly up to 230 DEG C carry out it is anti-
2h is answered, constantly has water to distillate in reaction process, after high temperature dehydration, then using sodium chloroacetate/alkali as catalyst, in 180 ± 5 DEG C of items
Stirring carries out catalysis reaction 1.2h under part, is cooled to room temperature to obtain intermediate product.
It is respectively that 42 parts of intermediate products with 4 parts of thiocarbamides react 2h in (150 ± 5) DEG C by mass parts, is subsequently to added into 2 parts of phosphoric acid
Triethanolamine and 2 parts of phosphorous acid phosphatization 1.5h, after be cooled to (50 ± 5) DEG C and be added in 50 parts of water and sufficiently dissolve, be cooled to often
Temperature obtains imidazoline sulphur phosphor corrosion inhibitor.Using the influence of normal octane simulation condensate, in corrosive medium (50mg/m3H2S, 0.5%
CO2, 60g/L CaCl2) in be added 30ppm imidazoline sulphur phosphor corrosion inhibitor, add 1% normal octane of liquid quality fraction, be added
Before and after normal octane, electrochemistry corrosion inhibition rate is increased to 91.6% by 80.2%, compounds the promotion of 1% normal octane corrosion mitigating effect, shows
The corrosion inhibiter and gas well condensate can produce good synergistic effect.
As described above, embodiments of the present invention are described in detail, as long as of the invention essentially without being detached from
Inventive point and effect can have many deformations, this will be readily apparent to persons skilled in the art.Therefore, such
Variation is also integrally incorporated within protection scope of the present invention.
Claims (10)
1. a kind of corrosion inhibiter for sulfur-bearing moisture conveyance conduit, which is characterized in that in terms of mass fraction, prepare raw material packet
It includes：35~50 parts of intermediate products, 3.2~4.8 parts of thiocarbamides, 1.2~2.4 parts of nitranols, 1.2~2.4 parts of phosphorous acid with
And 40~60 parts of water, the raw material for preparing of the intermediate product includes lauric acid and tetraethylenepentamine, and lauric acid and four ethylene five
The mass ratio of amine is 1：(1~2).
2. a kind of corrosion inhibiter for sulfur-bearing moisture conveyance conduit according to claim 1, which is characterized in that with mass parts
Number meter, preparing raw material includes：42 parts of intermediate products, 4 parts of thiocarbamides, 2 parts of nitranols, 2 parts of phosphorous acid and 50 parts of water,
The raw material for preparing of the intermediate product includes lauric acid and tetraethylenepentamine, and lauric acid and the mass ratio of tetraethylenepentamine are 1：
1.1。
3. a kind of corrosion inhibiter for sulfur-bearing moisture conveyance conduit according to claim 1 or 2, which is characterized in that described
The preparation method of intermediate product is：Distillation reaction is carried out after reactor is added in lauric acid, tetraethylenepentamine, then with monoxone
Sodium/alkali carries out catalysis reaction as catalyst, is cooled to room temperature up to intermediate product.
4. a kind of corrosion inhibiter for sulfur-bearing moisture conveyance conduit according to claim 3, which is characterized in that the steaming
Evaporating reaction is specially：3h is reacted at 150 ± 5 DEG C, then heats to 230 DEG C of reaction 2h.
5. a kind of corrosion inhibiter for sulfur-bearing moisture conveyance conduit according to claim 3, which is characterized in that described urges
Changing reaction is specially：1~1.5h is stirred to react under the conditions of 180 ± 5 DEG C.
6. a kind of corrosion inhibiter for sulfur-bearing moisture conveyance conduit according to claim 1 or 2, which is characterized in that described
It is 3.5-6.5, H that corrosion inhibiter, which is suitable for pH value,2S Han Liang≤100mg/m3、CO2Han Liang≤1%, salinity are 50~100g/L's
Corrosive environment.
7. a kind of preparation method of the corrosion inhibiter for sulfur-bearing moisture conveyance conduit, which is characterized in that include the following steps：
Step 1：By lauric acid and tetraethylenepentamine according to 1：The mass ratio of (1~2) carries out distillation reaction after reactor is added,
Catalysis reaction is carried out using sodium chloroacetate/alkali as catalyst again, is then cooled to room temperature up to intermediate product；
Step 2：35~50 parts of intermediate products are reacted at a temperature of 150 ± 5 DEG C with 3.2~4.8 parts of thiocarbamides, add 1.2~
Then 2.4 parts of nitranols and 1.2~2.4 parts of phosphorous acid phosphatization 1-2h are cooled to 50 ± 5 DEG C, 40~60 parts of water are added
It dissolves and is cooled to room temperature and obtain corrosion inhibiter for sulfur-bearing moisture conveyance conduit.
8. a kind of preparation method of corrosion inhibiter for sulfur-bearing moisture conveyance conduit according to claim 7, feature exist
In distillation reaction is specially in step 1：3h is reacted at 150 ± 5 DEG C, then heats to 230 DEG C of reaction 2h.
9. a kind of preparation method of corrosion inhibiter for sulfur-bearing moisture conveyance conduit according to claim 7, feature exist
In catalysis, which is reacted, in step 1 is specially：1~1.5h is stirred to react under the conditions of 180 ± 5 DEG C.
10. a kind of preparation method of corrosion inhibiter for sulfur-bearing moisture conveyance conduit according to claim 7, feature exist
In it is 3.5-6.5, H that prepared corrosion inhibiter, which is suitable for pH value,2S Han Liang≤100mg/m3、CO2Han Liang≤1%, salinity are 50
The corrosive environment of~100g/L.
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