CS270916B1 - Corrosion inhibitor for oil atmospheric distillation equipment - Google Patents
Corrosion inhibitor for oil atmospheric distillation equipment Download PDFInfo
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- CS270916B1 CS270916B1 CS868944A CS894486A CS270916B1 CS 270916 B1 CS270916 B1 CS 270916B1 CS 868944 A CS868944 A CS 868944A CS 894486 A CS894486 A CS 894486A CS 270916 B1 CS270916 B1 CS 270916B1
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- Czechoslovakia
- Prior art keywords
- weight
- corrosion inhibitor
- mass
- atmospheric distillation
- inhibitor
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- 239000003112 inhibitor Substances 0.000 title claims abstract description 17
- 238000005260 corrosion Methods 0.000 title claims description 12
- 230000007797 corrosion Effects 0.000 title claims description 12
- 238000004821 distillation Methods 0.000 title claims description 11
- HTMQZWFSTJVJEQ-UHFFFAOYSA-N benzylsulfinylmethylbenzene Chemical compound C=1C=CC=CC=1CS(=O)CC1=CC=CC=C1 HTMQZWFSTJVJEQ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 150000001412 amines Chemical class 0.000 claims abstract description 4
- 239000007859 condensation product Substances 0.000 claims description 5
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 4
- 239000000194 fatty acid Substances 0.000 claims description 4
- 229930195729 fatty acid Natural products 0.000 claims description 4
- 150000004665 fatty acids Chemical class 0.000 claims description 3
- 239000004094 surface-active agent Substances 0.000 claims description 3
- 230000003113 alkalizing effect Effects 0.000 claims description 2
- 150000003973 alkyl amines Chemical class 0.000 claims description 2
- 239000003093 cationic surfactant Substances 0.000 claims description 2
- 125000000623 heterocyclic group Chemical group 0.000 claims description 2
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims description 2
- 238000001179 sorption measurement Methods 0.000 claims description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims 1
- 239000013543 active substance Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 4
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 description 2
- -1 alkylammonium chlorides Chemical class 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- PAFZNILMFXTMIY-UHFFFAOYSA-N cyclohexylamine Chemical compound NC1CCCCC1 PAFZNILMFXTMIY-UHFFFAOYSA-N 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004381 Choline salt Substances 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 230000000274 adsorptive effect Effects 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 235000019417 choline salt Nutrition 0.000 description 1
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000003389 potentiating effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 150000003248 quinolines Chemical class 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Landscapes
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
Description
Vynález se týká inhibitoru koroze zařízení pro atmosférickou destilaci ropy.The present invention relates to a corrosion inhibitor of an apparatus for atmospheric distillation of petroleum.
Části technologických zařízení atmosférické destilace ropy jsou napadeny korozí, způsobenou nízkým pH vodného kondenzátu a dalšími agresivními složkami prostředí, například sulfanem. Ve vodném kondenzátu se rozpouští chlorovodík, vznikající hydrolýzou chloridů, přítomných v surové ropě. Ke korozi dochází zejména v místech ulpění vodného kondenzátu. Protíkorozní ochrana použitím inhibitorů je v současné době zajišťována převážně neutralizací chlorovodíku v plynné fázi vstřikováním amoniaku do des+llační kolony a dávkováním organických inhibitorů koroze do systému destilační kolony. Reakci amoniaku s chlorovodíkun vzniká chlorid amonný, který je také silně korozně agresivní. Z toho plyne nutnost dávkování vyšších koncentracích inhibitorů koroze na organické bázi, což může mít nepříjmené důsledky na technologický proces, jako například vznik úsad a tvorba emulzí.Parts of atmospheric oil distillation process equipment are attacked by corrosion caused by low pH of aqueous condensate and other aggressive environmental media such as sulfane. The aqueous condensate dissolves the hydrogen chloride produced by the hydrolysis of the chlorides present in the crude oil. Corrosion occurs especially at the places where water condensate adheres. Corrosion protection using inhibitors is currently largely ensured by neutralizing the hydrogen chloride in the gas phase by injecting ammonia into the desallation column and feeding organic corrosion inhibitors into the distillation column system. The reaction of ammonia with hydrogen chloride produces ammonium chloride, which is also strongly corrosive. This implies the need to dispense higher concentrations of organic-based corrosion inhibitors, which may have unpleasant consequences for the technological process, such as deposit formation and emulsion formation.
Výše uvedené nedostatky odstraňuje inhibitor koroze zařízení pro atmosférickou destilaci ropy podle vynálezu. Jeho podstata spočívá v tom, že obsahuje adsorpční složku, tvořenou 0,5 až 10 % hmot, dibenzylsulfoxidu a 10 až 40 % hmot, heterocyklických dusíkatých bází a alkalizační složku, tvořenou 20 až 60 % hmot, nízkomolekulárních aminů C2 až Cg. Podle dalšího význaku vynálezu může inhibitor obsahovat 0,5 až 35 % hmot, povrchové aktivních látek, například kondenzačních produktů alkenylaminů s mastnými kyselinami nebo kationaktivních tenzidů na bázi alkylaminoxidů nebo kvarterních amoniových solí.The above drawbacks are overcome by the corrosion inhibitor of the atmospheric distillation apparatus of the present invention. It comprises an adsorptive component of 0.5 to 10% by weight of dibenzylsulfoxide and 10 to 40% by weight of heterocyclic nitrogen bases and an alkalizing component of 20 to 60% by weight of the low molecular weight amines C2 to C8. According to another aspect of the invention, the inhibitor may comprise 0.5 to 35% by weight of surfactants, for example the condensation products of alkenylamines with fatty acids or cationic surfactants based on alkylamine oxides or quaternary ammonium salts.
Výhoda inhibitoru koroze zařízení pro destilaci ropy podle vynálezu spočívá v tom, že produkty neutralizace chlorovodíku těkavými aminy jsou příslušné alkylamoniumchloridy, které nemají korozivní vlastnosti, ale naopak projevují výrazný inhibiční účinek a současně synergizují působení adsorpční složky, kterou je dibenzylsulfoxid a dusíkaté heterocykly. Další výhoda inhibitoru podle vynálezu je v tom, že dibenzylsulfoxid, rozpuštěný v dusíkatých heterocyklech, ochotněji přechází do vodné fáze, kde působí jako účinný adsorpční inhibitor. Synergický efekt je dále zesílen přítomností povrchově aktivních látek, například kondenzačních produktů alkenylaminů s mastnými kyselinami. Aplikací inhibitoru podle vynálezu by se dosáhlo také zjednodušení technologie dávkování inhibitoru.An advantage of the corrosion inhibitor of the crude oil distillation plant of the present invention is that the products of neutralizing hydrogen chloride with volatile amines are the corresponding alkylammonium chlorides, which do not have corrosive properties but on the contrary exhibit a significant inhibitory effect while synergizing the adsorbent component dibenzyl sulfoxide and nitrogen heterocycles. A further advantage of the inhibitor according to the invention is that the dibenzyl sulfoxide, dissolved in the nitrogen heterocycles, is more readily transferred to the aqueous phase where it acts as a potent adsorption inhibitor. The synergistic effect is further enhanced by the presence of surfactants, for example, the condensation products of alkenylamines with fatty acids. Application of an inhibitor of the invention would also achieve a simplified inhibitor dosing technology.
Vynález je dále osvětlen v příkladných provedeních.The invention is further illustrated in exemplary embodiments.
Příklad 1Example 1
Inhibitor o složení 30 % hmot, sedmiprocentního roztoku dibenzylsulfoxidu ve směsi chtnolinových zásad o destilačním rozmezí 245 až 275 °C, 20 X hmot, kondenzačního produktu dietylentriaminu s kyselinou olejovou a 50 X hmot, dietylaminu byl přidán v koncentraci 10 ppm ke koroznímu roztoku, simulujícímu složení korozivního vodného kondenzátu v systémech atmosferické destilace ropy. Zkouška byla prováděna na vzorcích uhlíkaté oceli. Byla dosažena 96,4 % inhibiční účinnost.An inhibitor of 30% by weight, a 7% solution of dibenzyl sulfoxide in a mixture of choline salts with a distillation range of 245-275 ° C, 20% by weight, a diethylenetriamine-oleic acid condensation product and 50% by weight diethylamine was added at 10 ppm to a corrosion solution simulating composition of corrosive water condensate in atmospheric oil distillation systems. The test was performed on carbon steel samples. 96.4% inhibitory activity was achieved.
Příklad 2 % benzinový roztok inhibitoru o složení: 35 X hmot, pětiprocentního roztoku dibenzylsulfoxidu ve směsi chinolinových zásad o destilačním rozmezí 243 až 253 °C, 3 X hmot, kondenzačního produktu dietylentriaminu s mastnou rafinační kyselinou a 62 X hmot, cyklohexylaminu byl kontinuálně dávkován do poloprovozního destilačního zařízení v koncentraci 4 ppm na refluxní tok. Inhibitor prokázal účinnost 92,1 X na uhlíkaté oceli.Example 2% petrol solution of the following composition: 35% by weight, 5% dibenzylsulphoxide solution in quinoline base mixture with a distillation range of 243-253 ° C, 3% by weight, diethylenetriamine fatty acid condensation product and 62% by weight, cyclohexylamine was continuously dosed into of a pilot plant distillation apparatus at a concentration of 4 ppm per reflux flow. The inhibitor showed an efficiency of 92.1 X on carbon steel.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS868944A CS270916B1 (en) | 1986-12-04 | 1986-12-04 | Corrosion inhibitor for oil atmospheric distillation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS868944A CS270916B1 (en) | 1986-12-04 | 1986-12-04 | Corrosion inhibitor for oil atmospheric distillation equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CS894486A1 CS894486A1 (en) | 1990-01-12 |
| CS270916B1 true CS270916B1 (en) | 1990-08-14 |
Family
ID=5440708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS868944A CS270916B1 (en) | 1986-12-04 | 1986-12-04 | Corrosion inhibitor for oil atmospheric distillation equipment |
Country Status (1)
| Country | Link |
|---|---|
| CS (1) | CS270916B1 (en) |
-
1986
- 1986-12-04 CS CS868944A patent/CS270916B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CS894486A1 (en) | 1990-01-12 |
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