DE2746913A1 - Corrosion inhibited aq. di:ethanolamine acid gas scrubbing system - contg. e.g. low molecular wt. poly:alkylene poly:amine, copper and sulphur - Google Patents

Corrosion inhibited aq. di:ethanolamine acid gas scrubbing system - contg. e.g. low molecular wt. poly:alkylene poly:amine, copper and sulphur

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DE2746913A1
DE2746913A1 DE19772746913 DE2746913A DE2746913A1 DE 2746913 A1 DE2746913 A1 DE 2746913A1 DE 19772746913 DE19772746913 DE 19772746913 DE 2746913 A DE2746913 A DE 2746913A DE 2746913 A1 DE2746913 A1 DE 2746913A1
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deep
amine
copper
poly
ppm
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Robert George Asperger
Jun Smallwood Holoman
Leroy Stanley Krawczyk
Mich Midland
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Dow Chemical Co
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Dow Chemical Co
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/08—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
    • C10K1/10—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids
    • C10K1/12—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids alkaline-reacting including the revival of the used wash liquors
    • C10K1/14—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids alkaline-reacting including the revival of the used wash liquors organic
    • C10K1/143—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids alkaline-reacting including the revival of the used wash liquors organic containing amino groups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1493—Selection of liquid materials for use as absorbents
    • 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
    • C23F11/06—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in markedly alkaline 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
    • C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Analytical Chemistry (AREA)
  • Gas Separation By Absorption (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)

Abstract

An aq. (N-methyl)diethanolamine scrubbing soln. for acid gases is rendered less corrosive towards metals, esp. ferrous metals and their alloys, by the incorporation of (a) =1000 ppm of copper, or copper ion yielding cpd., (b) =1000 ppm of sulphur, or sulphur atom yielding cpd., and (c) 10-2000 ppm of an amine of formula (I): In (I), n is 1-3; m is >=2 sufficient to provide a mol. wt. of =800; R1-4 are H, CxH2x+1, CxH2xOH or CxH2xNR3R4, where x = 1 or 2; and r1 - R3 and R2 - R4 may be joined to form cyclic amines when n is 2. The soln. can contain a higher concn. of the amine absorbent and enables the system to absorb a larger quantity of acid gas (e.g. H2S and/or CO2) than when the corrosion inhibitor system is not present.

Description

Natürliche und synthetische Gase, die saure Komponenten wie CO[tief]2, H[tief]2S und COS enthalten, sind in großem Maßstab mit wässrigen Alkanolaminlösungen behandelt worden, um die saueren Komponenten zu entfernen. Die starke Korrosion, die von der Gegenwart dieser Komponenten besonders in dem Aufarbeitungsteil ausgeht, hat es erforderlich gemacht, dass eine niedrige Konzentration des Amins aufrechterhalten wird, die im allgemeinen bei 10-30 Prozent liegt. Außerdem wurde nur mit einer niedrigen Beladung der Absorbierlösung gearbeitet, d.h. dass die Menge der absorbierten sauren Komponenten wie H[tief]2S und CO[tief]2 niedrig gehalten wurde. Unter dem Gesichtspunkt der Einsparung von Energie würde es vorteilhaft sein, die Lösungen zur Behandlung der Gase stärker mit den saueren Gaskomponenten beladen zu können. Von weiterem Nutzen würde es sein, wenn konzentriertere Absorbierlösungen verwendet werden können. Um dieses aber erreichen zu können, müsste es gelingen eine Erhöhung der Korrosion zu vermeiden und sie sogar nach Möglichkeit niedriger zu halten, wie sie heute bei Verwendung von weniger konzentrierten Lösungen und niedrigeren Beladungen beobachtet werden.Natural and synthetic gases containing acidic components such as CO [deep] 2, H [deep] 2S and COS have been treated on a large scale with aqueous alkanolamine solutions to remove the acidic components. The severe corrosion emanating from the presence of these components, particularly in the work-up section, has made it necessary to maintain a low concentration of the amine, which is generally 10-30 percent. In addition, only a low loading of the absorbent solution was used, i.e. the amount of absorbed acidic components such as H [deep] 2S and CO [deep] 2 was kept low. From the point of view of saving energy, it would be advantageous to be able to load the solutions for treating the gases more heavily with the acidic gas components. It would be of further benefit if more concentrated absorbent solutions could be used. In order to be able to achieve this, however, it would have to be possible to avoid an increase in corrosion and even to keep it lower if possible, as is observed today when using less concentrated solutions and lower loads.

Aus der Literatur ist ersichtlich, dass in zahlreichen Patentschriften verschiedene Polyamine als Korrosionsinhibitoren für verschiedene fluide Systeme vorgeschlagen worden sind. So sind beispielsweise in der US-PS 33 62 791 Polyalkylenimine von einem Molekulargewicht oberhalb 800 als geeignete Korrosionsverhinderer für Eisen, Stahl und Eisenlegierungen bei der Berührung mit Schmierölen beschrieben. In der US-PS 21 43 393 ist die Absorbierung von saueren Gasen in einer wässrigen Lösung eines polymerisierten Alkylenimins beschrieben.It can be seen from the literature that various polyamines have been proposed as corrosion inhibitors for various fluid systems in numerous patents. For example, US Pat. No. 3,362,791 describes polyalkyleneimines with a molecular weight above 800 as suitable corrosion inhibitors for iron, steel and iron alloys when they come into contact with lubricating oils. US Pat. No. 2,143,393 describes the absorption of acidic gases in an aqueous solution of a polymerized alkyleneimine.

Allgemein kann man feststellen, dass es sehr zahlreiche Hinweise für die Verwendung von stickstoffhaltigen Verbindungen als Korrosionsinhibitoren gibt, doch haben sich nur sehr wenige von ihnen in der Technik einführen lassen. Für den Fachmann, der eine industrielle Anlage mit den vorhin geschilderten Begrenzungen hinsichtlich der Konzentration und der Beladung betreibt, ist es klar, dass die wenigen in der Technik benutzten Inhibitoren nicht geeignet sind, um in dem vorliegenden Fall die Anforderungen an eine effizientere Betriebsweise, höhere Konzentrationen des Absorbens' und eine höhere Beladung zum Zweck der erwünschten Energieeinsparung erfüllen zu können.In general, it can be stated that there are very numerous indications for the use of nitrogen-containing compounds as corrosion inhibitors, but only very few of them have been introduced into the technology. For the person skilled in the art who operates an industrial plant with the above-described limitations in terms of concentration and loading, it is clear that the few inhibitors used in technology are not suitable for the requirements of a more efficient mode of operation in the present case To be able to meet concentrations of the absorbent and a higher load for the purpose of the desired energy saving.

Gegenstand der vorliegenden Erfindung ist deshalb eine Zusammensetzung zur Inhibierung der Korrosion bei der Behandlung von Gassystemen mit wässrigem Alkanolamin, die gekennzeichnet ist durchThe present invention therefore provides a composition for inhibiting corrosion in the treatment of gas systems with aqueous alkanolamine, which is characterized by

1. eine Aminverbindung oder eine Mischung von Aminverbindungen der Formel in der n eine ganze Zahl von 1 bis 3 ist, m eine ganze Zahl von 2 bis zu einer ganzen Zahl ist, die ausreichend ist, um ein Molekulargewicht von bis zu 800 zu ergeben, R[tief]1, R[tief]2, R[tief]3 und R[tief]4 jeweils -H, -C[tief]n,H[tief]2n,OH, C[tief]n,H[tief]2n,, oder C[tief]n,H[tief]2n,N(R[tief]3)R[tief]4 ist, n' eine ganze Zahl von 1 bis 2 ist, und wobei R[tief]1R[tief]3 und R[tief]2R[tief]4 miteinander verbunden sein können und n' 2 ist, und wobei diese Aminverbindung in einer Menge von 10 bis 2000 ppm in der Behandlungslösung vorhanden ist.1. an amine compound or a mixture of amine compounds of the formula where n is an integer from 1 to 3, m is an integer from 2 to an integer sufficient to give a molecular weight of up to 800, R [deep] 1, R [deep] 2 , R [deep] 3 and R [deep] 4 each -H, -C [deep] n, H [deep] 2n, OH, C [deep] n, H [deep] 2n ,, or C [deep] n , H [deep] 2n, N (R [deep] 3) R [deep] 4, n 'is an integer from 1 to 2, and where R [deep] 1R [deep] 3 and R [deep] 2R [deep] 4 may be linked to each other and n 'is 2, and this amine compound is present in the treatment solution in an amount of 10 to 2000 ppm.

2. 0 bis 1000 ppm Kupfer oder eine ein Kupferion bildende Verbindung und2. 0 to 1000 ppm of copper or a compound which forms a copper ion and

3. 0 bis 1000 ppm Schwefel oder eine ein Schwefelatom abgebende Verbindung.3. 0 to 1000 ppm sulfur or a compound which donates a sulfur atom.

Beispiele für Aminverbindungen, die der vorstehenden allgemeinen Formel entsprechen, sind Polyäthylenimin (Polyäthylenpolyamine) mit Molekulargewichten von etwa 60 bis etwa 800, die Mischungen von einigen Aminen sein können, z.B. ein handelsübliches Polyalkylenpolyamin, das im Handel als "EA-10 (oder E-100)" bezeichnet wird und 8 bis 9 Gew.% Tetraäthylenpentamin, 30-35 Gew.% Pentaäthylenhexamin, 55 Gew.% Hexaäthylenheptamin und als Restbestandteile verzweigte und zyclische Isomere dieser Verbindungen enthält; Polyäthylenimine wie z.B. die Handelsprodukte "PEI 3" (Molekulargewicht 300 plus/minus 50) und "PEI 6" (Molekulargewicht etwa 600); "EA-17" Tris(aminoäthyl)amin (zu etwa 90 % verzweigt); "EA-19" Pentaäthylenhexamin (Molekulargewicht etwa 232); "EA-15" (eine Mischung von 35-45 Prozent Diäthylentriamin, 10-15 Prozent Triäthylendiamin, 5-15 Prozent Piperazin); "EA-25" (Reaktionsprodukt von Triäthylentetramin und Divinylbenzol); "EA-26" (eine Mischung aus Divinylbenzol, Äthylvinylbenzol und Diäthylentriamin); "EA-11" (eine Mischung aus Aminoäthylpiperazin und Diäthylentriamin); 1,2-Polypropylenimin, Tetraäthylenpentamin, Triäthylentetramin, Diäthylentriamin, Äthylendiamin und Dihydroxyäthyläthylendiamin.Examples of amine compounds corresponding to the above general formula are polyethyleneimine (polyethylene polyamines) with molecular weights from about 60 to about 800, which can be mixtures of some amines, e.g. a commercially available polyalkylene polyamine, which is commercially available as "EA-10 (or E- 100) "and contains 8 to 9% by weight of tetraethylene pentamine, 30-35% by weight of pentaethylene hexamine, 55% by weight of hexaethylene heptamine and the remaining components are branched and cyclic isomers of these compounds; Polyethyleneimines such as the commercial products "PEI 3" (molecular weight 300 plus / minus 50) and "PEI 6" (molecular weight about 600); "EA-17" tris (aminoethyl) amine (about 90% branched); "EA-19" pentaethylene hexamine (molecular weight about 232); "EA-15" (a mixture of 35-45 percent diethylenetriamine, 10-15 percent triethylenediamine, 5-15 percent piperazine); "EA-25" (reaction product of triethylenetetramine and divinylbenzene); "EA-26" (a mixture of divinylbenzene, ethylvinylbenzene, and diethylenetriamine); "EA-11" (a mixture of aminoethylpiperazine and diethylenetriamine); 1,2-polypropyleneimine, tetraethylene pentamine, triethylenetetramine, diethylenetriamine, ethylenediamine and dihydroxyethylethylenediamine.

Als kupferhaltigen Bestandteil kann die Zusammensetzung metallisches Kupfer oder Verbindungen die Kupferionen abgeben, beispielsweise CuCO[tief]3, enthalten.The composition can contain metallic copper or compounds that release copper ions, for example CuCO [deep] 3, as a copper-containing component.

Die korrosionsinhibierenden Zusammensetzungen nach der Erfindung enthalten außerdem Schwefel oder eine Ver- bindung die ein Schwefelatom abgibt, wie H[tief]2S oder SOS oder andere schwefelhaltige Verbindungen.The corrosion-inhibiting compositions according to the invention also contain sulfur or a ver bond that releases a sulfur atom, such as H [deep] 2S or SOS or other sulfur-containing compounds.

Die Inhibitoren sind am wirksamsten in Diäthanolaminlösungen, bei denen das Verhältnis von H[tief]2S zu CO[tief]2 im Bereich von 10:1 bis 1:10 liegt. Die Wirksamkeit der Inhibitoren ist derjenigen der heute benutzten Inhibitoren vergleichbar, bei denen das behandelte Gas H[tief]2S und CO[tief]2 in Mengen bis zu 40 Teilen CO[tief]2 pro Teil H[tief]2S enthält. Die Absorbentien Diäthanolamin und Methyldiäthanolamin werden wirksamer gegen Korrosion bei Benutzung der Inhibitorsysteme gemäß dieser Erfindung geschützt, wenn nur H[tief]2S zugegen ist und die Ergebnisse sind nicht so hervorragend, wenn auch CO[tief]2 anwesend ist.The inhibitors are most effective in diethanolamine solutions where the ratio of H [deep] 2S to CO [deep] 2 is in the range from 10: 1 to 1:10. The effectiveness of the inhibitors is comparable to that of the inhibitors used today, in which the treated gas contains H [deep] 2S and CO [deep] 2 in amounts of up to 40 parts CO [deep] 2 per part H [deep] 2S. The absorbents diethanolamine and methyldiethanolamine are more effectively protected against corrosion when using the inhibitor systems according to this invention when only H [deep] 2S is present and the results are not as excellent when CO [deep] 2 is also present.

Als Alkanolamine für die saueren Gase kommen beispielsweise in Betracht Mono-C[tief]2-3-alkanolamine wie Monoäthanolamin (MÄA), Monoisopropanolamin (MIPA), die Dialkanol-C[tief]2-3-amine, wie Diäthanolamin (DÄA) und ihre N-alkylsubstituierten Derivate wie Methyldiäthanolamin (MDÄA). Besonders die Dialkanolamine zeigen eine wesentlich geringere Korrosion, wenn die Inhibitoren nach der Erfindung verwendet werden.Suitable alkanolamines for the acidic gases are, for example, mono-C [deep] 2-3-alkanolamines such as monoethanolamine (MÄA), monoisopropanolamine (MIPA), the dialkanol-C [deep] 2-3-amines, such as diethanolamine (DÄA) and their N-alkyl substituted derivatives such as methyl diethanolamine (MDÄA). The dialkanolamines in particular show significantly less corrosion when the inhibitors according to the invention are used.

Die praktische Durchführung und Erprobung der korrosionsinhibierenden Zusammensetzung nach der Erfindung erfolgte in einem modifizierten "Sparkler Filter" bei einem Druck von 2,8 kg/cm[hoch]2 und einer Temperatur von 125°C für 17 Stunden. Alle Testproben aus einem weichen Stahl (1020 mild steel) wurden mit 5-n Salzsäure geätzt, mit Seife gewaschen, mit Wasser und Aceton gespült und gewogen. Dann wurden die Proben in 114 ccm Flaschen gegeben, die den zu untersuchenden Inhibitor und eine Mischung aus 50% Diäthanolamin (DÄA) und 50% Wasser enthielt. Die Mischung war mit H[tief]2S/CO[tief]2 bei verschiedenen Gasverhältnissen gesättigt. Das Gesamtvolumen derThe corrosion-inhibiting composition according to the invention was carried out in practice and tested in a modified “Sparkler Filter” at a pressure of 2.8 kg / cm 2 and a temperature of 125 ° C. for 17 hours. All test samples made of a soft steel (1020 mild steel) were etched with 5N hydrochloric acid, washed with soap, rinsed with water and acetone and weighed. The samples were then placed in 114 ccm bottles which contained the inhibitor to be investigated and a mixture of 50% diethanolamine (DÄA) and 50% water. The mixture was saturated with H [deep] 2S / CO [deep] 2 at various gas ratios. The total volume of the

Flüssigkeit war in jeder Flasche zu Beginn des Experiments 120 ml. Am Ende jedes Versuchs wurden die Stahlproben erneut mit Säure, die HCl Inhibitor enthielt, geätzt, mit Seife und Wasser gewaschen und mit Aceton gespült und gewogen. Die Korrosionsrate und die prozentuelle Inhibierung wurden aufgrund des Wiegens der Stahlproben vor und nach der Behandlung nach der folgenden Gleichung berechnet: wobei G = Gewichtsverlust in mg; D = Dichte der Probe in g/ccm; A = Fläche in Quadratzoll (1 Quadratzoll = 6,45 cm[hoch]2) T = Einwirkungszeit.Liquid in each bottle was 120 ml at the beginning of the experiment. At the end of each experiment, the steel samples were again etched with acid containing HCl inhibitor, washed with soap and water and rinsed with acetone and weighed. The corrosion rate and the percent inhibition were calculated from the weighing of the steel samples before and after the treatment according to the following equation: where G = weight loss in mg; D = density of the sample in g / ccm; A = area in square inches (1 square inch = 6.45 cm [high] 2) T = exposure time.

% Inhibierung = mittlere Korrosionsrate der Blindprobe - % Inhibition = mean corrosion rate of the blank sample -

Jede der folgenden Tabellen zeigt die durchgeführten Versuche und die erhaltenen Ergebnisse bei einer Serie von Prüfungen an. Die Korrosionsgeschwindigkeit für eine nichtinhibierte Blindprobe wurde bei jeder Versuchsserie ermittelt, um einen direkten Vergleich mit den anderen Prüfungen dieser Serie zu haben.Each of the following tables shows the tests carried out and the results obtained in a series of tests. The corrosion rate for a non-inhibited blank sample was determined for each test series in order to have a direct comparison with the other tests in this series.

In jeder Tabelle ist die Korrosionsgeschwindigkeit bzw. Korrosionsrate in Millimeter pro Jahr (mm/a) angegeben.In each table the corrosion rate or corrosion rate is given in millimeters per year (mm / a).

Es werden die folgenden Abkürzungen in den Tabellen verwendet:The following abbreviations are used in the tables:

E-100 Polyäthylenpolyamin, Mol.Gew. 150-300E-100 polyethylene polyamine, Mol.Gew. 150-300

PÄI 6 Polyäthylenimin, mittleres Mol.Gew. 600PÄI 6 polyethyleneimine, average mole weight 600

TRT-3 handelsüblicher InhibitorTRT-3 commercial inhibitor

EA-75 Polyäthylenimin (E-75) filtrierte Feststoffe von E-100EA-75 polyethyleneimine (E-75) filtered solids from E-100

PÄI 3 Polyäthylenimin, mittleres Mol.Gew. 300PÄI 3 polyethyleneimine, average mol weight 300

RCC-9 TetradecylalkylpyridiniumbromidRCC-9 tetradecylalkyl pyridinium bromide

FO-6 handelsübliches quaternäres AminFO-6 commercial quaternary amine

Tabelle ITable I.

50% DÄA H[tief]2S/CO[tief]2 9/150% DÄA H [deep] 2S / CO [deep] 2 9/1

(1) 10 ccm 50% wässriges DÄA(1) 10 ccm 50% aqueous DÄA

Tabelle IITable II

50% DÄA H[tief]2S/CO[tief]2 9/150% DÄA H [deep] 2S / CO [deep] 2 9/1

Tabelle IIITable III

50% DÄA H[tief]2S/CO[tief]2 9/150% DÄA H [deep] 2S / CO [deep] 2 9/1

Tabelle IVTable IV

50% DÄA H[tief]2S/CO[tief]2 9/150% DÄA H [deep] 2S / CO [deep] 2 9/1

(1) Äthylendiamin(1) ethylene diamine

(2) Triäthylentetramin(2) triethylenetetramine

(3) Tetraäthylenpentamin(3) tetraethylene pentamine

Tabelle VTable V

50% DÄA H[tief]2S/CO[tief]2 1/150% DÄA H [deep] 2S / CO [deep] 2 1/1

Tabelle VITable VI

50% DÄA CO[tief]2/H[tief]2S 10/150% DÄA CO [deep] 2 / H [deep] 2S 10/1

Tabelle VIITable VII

50% DÄA H[tief]2S/CO[tief]2/COS 8/1/150% DÄA H [deep] 2S / CO [deep] 2 / COS 8/1/1

Tabelle VIIITable VIII

70% DÄA H[tief]2S/CO[tief]2 9/170% DÄA H [deep] 2S / CO [deep] 2 9/1

Tabelle IXTable IX

50% N-Methyl-DÄA H[tief]2S/CO[tief]2 9/150% N-methyl-DÄA H [deep] 2S / CO [deep] 2 9/1

Tabelle XTable X

50% N-Methyl-DÄA CO[tief]2/H[tief]2S 10/150% N-methyl-DÄA CO [deep] 2 / H [deep] 2S 10/1

Tabelle XITable XI

50% N-Methyl-DÄA CO[tief]2/H[tief]2S 50/150% N-methyl-DÄA CO [deep] 2 / H [deep] 2S 50/1

Tabelle XIITable XII

30% MÄA H[tief]2S/CO[tief]2 9/130% MÄA H [deep] 2S / CO [deep] 2 9/1

Tabelle XIIITable XIII

40% MIPA H[tief]2S/CO[tief]2 9/140% MIPA H [deep] 2S / CO [deep] 2 9/1

Claims (6)

1.) Zusammensetzung zur Inhibierung der Korrosion bei der Behandlung von Gassystemen mit wässrigem Alkanolamin, gekennzeichnet durch1.) Composition for inhibiting corrosion in the treatment of gas systems with aqueous alkanolamine, characterized by 1. eine Aminverbindung oder eine Mischung von Aminverbindungen der Formel in der n eine ganze Zahl von 1 bis 3 ist, m eine ganze Zahl von 2 bis zu einer ganzen Zahl ist, die ausreichend ist, um ein Molekulargewicht von bis zu 800 zu ergeben, R[tief]1, R[tief]2, R[tief]3 und R[tief]4 jeweils -H, -C[tief]n,H[tief]2n, OH, C[tief]n,H[tief]2n,, oder -C[tief]n,H[tief]2n,N(R[tief]3)R[tief]4 ist, n' eine ganze Zahl von 1 bis 2 ist, und wobei R[tief]1R[tief]3 und R[tief]2R[tief]4 miteinander verbunden sein können und n' 2 ist, und wobei diese Aminverbindung in einer Menge von 10 bis 2000 ppm in der Behandlungslösung vorhanden ist,1. an amine compound or a mixture of amine compounds of the formula where n is an integer from 1 to 3, m is an integer from 2 to an integer sufficient to give a molecular weight of up to 800, R [deep] 1, R [deep] 2 , R [deep] 3 and R [deep] 4 each -H, -C [deep] n, H [deep] 2n, OH, C [deep] n, H [deep] 2n ,, or -C [deep] n, H [deep] 2n, N (R [deep] 3) R [deep] 4, n 'is an integer from 1 to 2, and where R [deep] 1R [deep] 3 and R [deep] 2R [deep] 4 can be linked to one another and n 'is 2, and wherein this amine compound is present in the treatment solution in an amount of 10 to 2000 ppm, 2. 0 bis 1000 ppm Kupfer oder eine ein Kupferion bildende Verbindung und2. 0 to 1000 ppm of copper or a compound which forms a copper ion and 3. 0 bis 1000 ppm Schwefel oder eine ein Schwefelatom abgebende Verbindung.3. 0 to 1000 ppm sulfur or a compound which donates a sulfur atom. 2. Zusammensetzung nach Anspruch 1,2. Composition according to claim 1, dadurch gekennzeichnet,characterized, dass die Aminverbindung ein Polyäthylenamin mit einem mittleren Molekulargewicht von 250 bis 300 ist.that the amine compound is a polyethylene amine with an average molecular weight of 250-300. 3. Zusammensetzung nach Anspruch 1,3. Composition according to claim 1, dadurch gekennzeichnet,characterized, dass das Amin ein Polyäthylenimin mit einem Molekulargewicht von etwa 300 ist.that the amine is a polyethyleneimine with a molecular weight of about 300. 4. Zusammensetzung nach Anspruch 1,4. Composition according to claim 1, dadurch gekennzeichnet,characterized, dass die Aminverbindung ein Polyäthylenimin mit einem mittleren Molekulargewicht von etwa 600 ist.that the amine compound is a polyethyleneimine with an average molecular weight of about 600. 5. Zusammensetzung nach Anspruch 1,5. Composition according to claim 1, dadurch gekennzeichnet,characterized, dass die Aminverbindung eine Polyäthylenpolyamin-Mischung mit einem mittleren Molekulargewicht von 250 bis 300 ist.that the amine compound is a polyethylene polyamine mixture with an average molecular weight of 250 to 300. 6. Zusammensetzung nach Anspruch 1,6. Composition according to claim 1, dadurch gekennzeichnet,characterized, dass das Alkanolamin Diäthanolamin ist.that the alkanolamine is diethanolamine.
DE19772746913 1977-10-19 1977-10-19 Corrosion inhibited aq. di:ethanolamine acid gas scrubbing system - contg. e.g. low molecular wt. poly:alkylene poly:amine, copper and sulphur Withdrawn DE2746913A1 (en)

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
EP0034901A1 (en) * 1980-02-19 1981-09-02 Exxon Research And Engineering Company Acid gas scrubbing process using hindered amine solution with hindered amine recovery from side-product cyclic urea
EP0073976A1 (en) * 1981-09-04 1983-03-16 Linde Aktiengesellschaft Process for scrubbing acid gases from gas mixtures
WO1989011327A1 (en) * 1988-05-24 1989-11-30 Societe Nationale Elf Aquitaine (Production) Liquid absorbing acid gases
FR2631853A1 (en) * 1988-05-24 1989-12-01 Elf Aquitaine Liquid absorbing acidic gases containing a tertiary alkanolamine component and an activator for CO2 absorption, and its application to the deacidification of gases containing CO2 and possibly other acidic gases

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US2559580A (en) * 1947-01-30 1951-07-10 Girdler Corp Stabilization of aqueous amine solutions against oxidation and corrosion in gas separation processes
DE2112574A1 (en) * 1970-03-19 1971-10-07 Dow Chemical Co Polyalkylenepolyamine preparations
US3959170A (en) * 1971-11-22 1976-05-25 Union Carbide Corporation Corrosion inhibitors for alkanolamine gas treating system
DE2551717A1 (en) * 1975-11-18 1977-06-02 Basf Ag METHOD OF REMOVING CO LOW 2 AND / OR H LOW 2 S AND / OR COS FROM GASES CONTAINING THESE COMPONENTS

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DE2112574A1 (en) * 1970-03-19 1971-10-07 Dow Chemical Co Polyalkylenepolyamine preparations
US3959170A (en) * 1971-11-22 1976-05-25 Union Carbide Corporation Corrosion inhibitors for alkanolamine gas treating system
DE2551717A1 (en) * 1975-11-18 1977-06-02 Basf Ag METHOD OF REMOVING CO LOW 2 AND / OR H LOW 2 S AND / OR COS FROM GASES CONTAINING THESE COMPONENTS

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0034901A1 (en) * 1980-02-19 1981-09-02 Exxon Research And Engineering Company Acid gas scrubbing process using hindered amine solution with hindered amine recovery from side-product cyclic urea
EP0073976A1 (en) * 1981-09-04 1983-03-16 Linde Aktiengesellschaft Process for scrubbing acid gases from gas mixtures
WO1989011327A1 (en) * 1988-05-24 1989-11-30 Societe Nationale Elf Aquitaine (Production) Liquid absorbing acid gases
FR2631853A1 (en) * 1988-05-24 1989-12-01 Elf Aquitaine Liquid absorbing acidic gases containing a tertiary alkanolamine component and an activator for CO2 absorption, and its application to the deacidification of gases containing CO2 and possibly other acidic gases
EP0348251A1 (en) * 1988-05-24 1989-12-27 Elf Aquitaine Production Liquid absorbant of acid gases containing a tertiary alcanolamin compound and an absorption activator for CO2 and its use for the deacidification of CO2 and possibly other acid gases

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