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EC / List no.: 203-312-7
CAS no.: 105-59-9
Mol. formula: C5H13NO2
Methyl diethanolamine, also known as N-methyl diethanolamine and more commonly as MDEA, is the organic compound with the formula CH3N(C2H4OH)2.
Methyl Diethanolamine (MDEA) is a colorless liquid with an ammonia odor.
Methyl Diethanolamine (MDEA) is miscible with water, ethanol and benzene.
A tertiary amine, it is widely used as a sweetening agent in chemical, oil refinery, syngas production and natural gas.
Similar compounds are monoethanolamine (MEA), a primary amine, and diethanolamine (DEA), a secondary amine, both of which are also used for amine gas treating.
MDEA's defining characteristic when compared to these other amines is its ability to preferentially remove H2S (and strip CO2) from sour gas streams.
Methyl Diethanolamine (MDEA)'s popularity as a solvent for gas treating stems from several advantages it has when compared to other alkanolamines.
One of these advantages is a low vapor pressure, which allows for high amine compositions without appreciable losses through the absorber and regenerator.
Methyl Diethanolamine (MDEA) is also resistant to thermal and chemical degradation and is largely immiscible with hydrocarbons.
Methyl Diethanolamine (MDEA) is a common base note in perfumes to allow the fragrance to last.
Lastly, Methyl Diethanolamine (MDEA) has a relatively low heat of reaction with hydrogen sulfide and carbon dioxide, which allows for lower reboiler duties, thus lower operating costs.
Methyl Diethanolamine (MDEA) blends
Methyl Diethanolamine (MDEA) is less reactive towards CO2, but has an equilibrium loading capacity approaching 1 mole CO2 per mole amine.
Methyl Diethanolamine (MDEA) also requires less energy to regenerate.
To combine the advantages of Methyl Diethanolamine (MDEA) and the smaller amines, Methyl Diethanolamine (MDEA) is usually mixed with a catalytic promoter such as piperazine, PZ, or a fast reacting amine such as MEA to retain reactivity, but lower regeneration costs.
Activated Methyl Diethanolamine (MDEA) or aMDEA uses piperazine as a catalyst to increase the speed of the reaction with CO2.
Methyl Diethanolamine (MDEA) has been commercially successful.
Many tests have been done on the performance of MDEA/MEA or MDEA/piperazine mixtures compared to single amines.
CO2 production rates were higher than MEA for the same heat duty and total molar concentration when experiments were performed in the University of Regina pilot plant, which is a modeled after a natural gas plant.
There were also insignificant trace amounts of degradation products detected.
However, when the same control variables and tests were conducted at the Boundary Dam Power Station plant, the CO2 production rate for the mixed solvent was lower than MEA.
This was a result of the reduction in the capacity of the solvent to absorb CO2 after degradation.
Because the Boundary Dam plant is a coal-fired power plant, it operates under harsher environments and produces an impure flue gas containing, fly ash, SO2, and NO2 that are fed into carbon capture.
Even with flue gas pretreatment, there is still enough to produce degradation products such as straight chain amines and sulfur compounds, which accumulate so it is no longer possible to regenerate MEA and MDEA.
For these blends to be successful in reducing heat duty, their chemical stabilities must be maintained.
Degradation
Main oxidative degradation products of Methyl Diethanolamine (MDEA) include monoethanol amine (MEA), methyl-aminoethanol (MAE), diethanolamine (DEA), amino acids bicine, glycine and hydroxyethyl sarcosine (HES), formyl amides of MAE and DEA, ammonia, and stable salts formate, glycolate, acetate, and oxalate.
In an industrial plan that utilizes Methyl Diethanolamine (MDEA), oxidative degradation is most likely to shift to the cross exchanger where temperatures are greater than 70 °C.
Higher temperatures and higher CO2 loading accelerate the rate of degradation, resulting in an increase of alkalinity loss as well as total formate production.
While Methyl Diethanolamine (MDEA) is more resistant to degradation as a standalone compared to MEA, Methyl Diethanolamine (MDEA) is preferentially degraded when in an MDEA/MEA blend.
Because of the formation of DEA and MAE, which could form nitroso-compounds or diethylnitrosamine and diethylnitraine, the blend could potentially have an adverse impact in terms of atmospheric admissions.
In the Boundary Dam plant, emissions increased when CO2 loading of lean amine increased for the blend and MEA.
However, decreasing the lean loading increases the reboiler heat duty, which results in an obvious tradeoff between emissions and heat duty or energy costs.
This compound should not be confused with the recreational drug methylenedioxyethylamphetamine which is also abbreviated Methyl Diethanolamine (MDEA).
Production
Methyl Diethanolamine (MDEA) is produced by ethoxylation of methylamine using ethylene oxide:
CH3NH2 + 2 C2H4O → CH3N(C2H4OH)2
Another route involves hydroxymethylation of diethanolamine followed by hydrogenolysis.
Chemical Properties
Methyl diethanolamine (MDEA) is a colorless to yellow viscous liquid with an ammonia-like odor.
Methyl Diethanolamine (MDEA) is completely soluble in water.
Methyl diethanolamine is an alkyl alkanolamine.
Methyl Diethanolamine (MDEA) combines the chemical characteristics of both amines and alcohols so that it is capable of undergoing reactions typical of both alcohols and amines: forming quaternary amine salts, soaps, and esters.
Uses:
Methyl Diethanolamine (MDEA) is used as an intermediate in the synthesis of numerous products.
Its unique chemistry has resulted in its use in diverse areas, including coatings, textile lubricants, polishes, detergents, pesticides, personal-care products, pharmaceuticals, urethane catalysts, and water-treatment chemicals.
Methyl Diethanolamine (MDEA) is also used in absorption of acidic gases, catalyst for polyurethane foams, pH control agent.
Methyl Diethanolamine (MDEA) is a reagent used for protection of boronic acids as N-methyl-O,O-diethanolamine esters.
Methyl Diethanolamine (MDEA) may be employed in the following studies:
Synthesis of aluminophosphate-based molecular sieves.
Preparation of N-methyl-N-R-N,N-bis(2-hydroxyethyl) ammonium bromides.
Preparation of cationic polyurethane dispersions.
Textiles :
Used in manufacturing of softener, soap emulsifying agent, Lubricants, Paraffin Emulsion and dyes.
Pharmaceuticals:
In synthesis of analgesics and the intermediate product for some products.
Gas absorbent :
Purifies the gases particularly natural gas for the bulk removable of Carbon Dioxide and also used as a scrubbing and extracting agent in Gas treatment.
Catalyst :
Effective catalyst for urethane and epoxy resin coating system.
Formulators :
Used in lubricating oil, hydraulic fluids, corrosion inhibitor, refractory binder, surface active agent, solvent in water paint formula, Herbicides, Pesticides formulation and for PH control.
Methyl Diethanolamine (MDEA) is versatile bifunctional molecules compound that combines the characteristic of Amine and hydroxyl group.
So, during the reaction it behaves like Alcohol and Amine Group but Amine group usually exhibits the greater activities.
MDEA can be modified with the help of some additives, the product is known as an activated Methyl Diethanolamine.
Preparation
Methyl Diethanolamine (MDEA) is produced by the reaction between ethylene oxide and methylamine.
Industry Uses
- Distribution
- Fuels and fuel additives
- Functional fluids (closed systems)
- Functional fluids (open systems)
- Gas Treating Solvents
- Intermediates
- Lubricants and lubricant additives
- Paint additives and coating additives not described by other categories
- Processing aids, not otherwise listed
- Processing aids, specific to petroleum production
- Solvents (for cleaning and degreasing)
- Solvents (which become part of product formulation or mixture)
- Surface active agents
Consumer Uses
- Building/construction materials not covered elsewhere
- Electrical and electronic products
- Fuels and related products
- Gas Treating
- Lubricants and greases
- Metal products not covered elsewhere
- Paints and coatings
- Water treatment products
General Manufacturing Information
Industry Processing Sectors
- Adhesive manufacturing
- All other basic organic chemical manufacturing
- All other chemical product and preparation manufacturing
- Computer and electronic product manufacturing
- Construction
- Fabricated metal product manufacturing
- Mining (except oil and gas) and support activities
- Oil and gas drilling, extraction, and support activities
- Paint and coating manufacturing
- Pesticide, fertilizer, and other agricultural chemical manufacturing
- Petroleum refineries
- Plastic material and resin manufacturing
- Printing ink manufacturing
- Soap, cleaning compound, and toilet preparation manufacturing
- Utilities
- Wholesale and retail trade
General description
Methyl Diethanolamine (MDEA) is an alkanolamine.
Methyl Diethanolamine (MDEA) is a clear, Colorless or Pale Yellow liquid with Ammonical Odor.
Methyl Diethanolamine (MDEA) is miscible with water, alcohol and benzene.
Methyl Diethanolamine is also known as a MDEA or N-Methyl Diethanolamine.
Methyl Diethanolamine is widely used as a decarbonizer and Sweating agent in chemical, oil refinery, Gas synthesis, Natural gas & gas.
MDEA is more efficient absorber then MEA & DEA for sulphur contains impurity and acid gases found in natural gas processing.
Methyl Diethanolamine (MDEA) is a dihydroxy functional tertiary amine.
Methyl Diethanolamine (MDEA) is a versatile intermediate with a variety of applications.
Coatings
Methyl Diethanolamine (MDEA) is used as a co-initiator for type II photoinitiator combinations.
As a neutralizing agent, Methyl Diethanolamine (MDEA) increases resin solubility and improves solution stability by reducing pH drift.
Additionally, it aids pigment dispersion.
Foams and Elastomers
Methyl Diethanolamine (MDEA) can be used as a chain extender during the synthesis of polyol-based polyurethane foams and elastomers.
Inks
Methyl Diethanolamine (MDEA) is used as a co-initiator for type II photoinitiator combinations.
As a neutralizing agent, Methyl Diethanolamine (MDEA) increases resin solubility and improves solution stability by reducing pH drift. Additionally, it aids pigment dispersion.
Metal Working
In metal working fluids, Methyl Diethanolamine (MDEA) is used both as a pH buffer as well as an anticorrosion additive.
Textiles
Methyl Diethanolamine (MDEA) forms quat salts with fatty acids which then find application in fabric softener formulations.
Methyldiethanolamine, also known as N-methyl diethanolamine and more commonly as MDEA, is the organic compound with the formula CH₃N(C₂H₄OH)₂.
Methyl Diethanolamine (MDEA) is a colorless liquid with an ammonia odor.
Methyl Diethanolamine (MDEA) is miscible with water, alcohol, and benzene.
As a tertiary amine, it is widely used as a sweetening agent in chemical plants, oil refineries, syngas, and natural gas production.
MDEA is less corrosive with lower energy requirements used in acid gas removal applications.
Methyldiethanolamine is an alkyl alkanolamine that is used in gas treatment applications and serves as an intermediate in the synthesis of numerous products.
Methyldiethanolamine is a low hazard material and risk of adverse health effects associated with both occupational and consumer use of this chemical is anticipated to be low.
Name: Methyldiethanolamine
Chemical name (IUPAC): 2,2'-(methylimino)diethanol
CAS number(s): 105-59-9
EC number: 203-312-7
Molecular formula: C5H13NO2
Uses and Applications
Methyldiethanolamine is used as an intermediate in the synthesis of numerous products.
Its unique chemistry has resulted in its use in diverse areas, including coatings, textile lubricants, polishes, detergents, pesticides, personal-care products, pharmaceuticals, urethane catalysts, and water-treatment chemicals.
Methyldiethanolamine is also used in gas treatment.
Methyl Diethanolamine (MDEA) is also known as Methyl Diethanolamine or MDEA with chemical formula CH3N (C2H4OH)2. MDEA is a colorless yellow liquid with ammonia odor.
Methyl Diethanolamine (MDEA) is used as decarbonizer and sweetening agent in gas synthesis, oil refinery, chemical, and natural gas.
The Methyl Diethanolamine (MDEA) market is projected to grow substantially over the forecast period attributing to increasing demand for carbon capture and sequestration (CCS) coupled with growing demand for MDEA from oil & gas industry.
Methyl Diethanolamine (MDEA) is organic compound that is colorless liquid and has ammonia odor.
Methyl Diethanolamine (MDEA) is widely used as a sweetening agent in oil refinery, natural gas and syngas, and chemicals production.
The applications of MDEA include gas absorbent, catalyst for urethane and epoxy resin coating system, and as formulators in oil & gas industry.
Methyl Diethanolamine (MDEA) is used as a softening agent in textile industry.
Softening agents are used to give better fabric handle, drape, softness, cutting, and sewing qualities to fabric.
These softening agents are applied on yarn, fiber, knitted, and woven fabrics during dyeing process.
Methyl Diethanolamine (MDEA) is also used in manufacturing of dyes, paraffin emulsion, textile lubricants, and soap emulsifying agents in the textile industry.
Methyl Diethanolamine (MDEA) a clear, water-white, hygroscopic liquid with an ammoniacal odor.
About Methyl Diethanolamine (MDEA)
Helpful information
Methyl Diethanolamine (MDEA) is registered under the REACH Regulation and is manufactured in and/or imported to the European Economic Area, at ≥ 10 000 to < 100 000 tonnes per annum.
Methyl Diethanolamine (MDEA) is used in articles, by professional workers (widespread uses), in formulation or re-packing, at industrial sites, and in manufacturing.
Consumer Uses
ECHA has no public registered data indicating whether or in which chemical products the substance might be used.
ECHA has no public registered data on the routes by which Methyl Diethanolamine (MDEA) is most likely to be released to the environment.
Article service life
Another release to the environment of Methyl Diethanolamine (MDEA) is likely to occur from outdoor use in long-life materials with low release rate (e.g. metal, wooden and plastic construction, and building materials) and indoor use in long-life materials with low release rate (e.g. flooring, furniture, toys, construction materials, curtains, foot-wear, leather products, paper and cardboard products, electronic equipment).
Methyl Diethanolamine (MDEA) can be found in products with materials based on plastic (e.g. food packaging and storage, toys, mobile phones).
Widespread uses by professional workers
Methyl Diethanolamine (MDEA) is used in the following products coating products, lubricants and greases, metalworking fluids, polymers and laboratory chemicals.
Methyl Diethanolamine (MDEA) is used in the following areas building & construction work.
Methyl Diethanolamine (MDEA) is used for the manufacture of plastic products.
Release to the environment of Methyl Diethanolamine (MDEA) can occur from industrial use: in processing aids at industrial sites.
Another release to the environment of Methyl Diethanolamine (MDEA) is likely to occur from indoor use (e.g. machine wash liquids/detergents, automotive care products, paints, and coating or adhesives, fragrances, and air fresheners) and outdoor use.
Formulation or re-packing
Methyl Diethanolamine (MDEA) is used in the following products polymers.
Release to the environment of Methyl Diethanolamine (MDEA) can occur from industrial use: formulation of mixtures, the formulation in materials, and in the production of articles.
Uses at industrial sites
Methyl Diethanolamine (MDEA) is used in the following products laboratory chemicals, pH regulators and water treatment products, coating products, lubricants and greases, metalworking fluids and polymers.
Methyl Diethanolamine (MDEA) has an industrial use resulting in the manufacture of another substance (use of intermediates).
Methyl Diethanolamine (MDEA) is used for the manufacture of chemicals and textile, leather or fur.
Release to the environment of Methyl Diethanolamine (MDEA) can occur from industrial use, in processing aids at industrial sites, as an intermediate step in further manufacturing of another substance, of substances in closed systems with the minimal release in the production of articles and as a processing aid.
Manufacture
Release to the environment of Methyl Diethanolamine (MDEA) can occur from industrial use, and manufacturing of the substance.
The alkanolamines and their aqueous solutions will absorb carbon dioxide and hydrogen sulfide at lower temperatures and release the acid gases at higher temperatures.
This forms the basis for processes which separate carbon dioxide and hydrogen sulfide from gas streams.
Methyldiethanolamine is an alkanolamine used in tail gas treating and hydrogen sulfide enrichment units for selectively removing hydrogen sulfide from gas streams containing carbon dioxide.
These units will, in most cases, permit 60 to 80% of the carbon dioxide to remain in the treated gas stream.
Methyldiethanolamine is also used in natural gas plants for the bulk removal of carbon dioxide while producing a gas stream containing 0.25 grains hydrogen sulfide/100 scf.
Bulk carbon dioxide removal can be realized with methyldiethanolamine when the CO2:H2S ratio ranges from 100 to 1,000.
Other suggested uses are urethane catalyst, textile softeners, pH control, and epoxy resin curing agents.
Methyldiethanolamine (MDEA) is a tertiary amine.
Methyl Diethanolamine (MDEA) is a versatile, polyfunctional molecule that combines thecharacteristics of amines and alcohols.
Methyl Diethanolamine (MDEA) is capable of undergoing reactions typical of both alcohols and amines, forming Quaternary amine salts, soaps, and esters.
This makes Methyl Diethanolamine (MDEA) a useful intermediate in the synthesis of numerous products, and has resulted in its use in many diverse areas, including coatings, textile lubricants, polishes, detergents,pesticides, personal care products, and pharmaceuticals.
IUPAC NAMES:
2,2'-(Methylazanediyl)di(ethan-1-ol)
2,2'-(methylimino)diethanol
2,2'-(methylimino)diethanol
2,2'-Methyliminodiethanol
2,2'-methyliminodiethanol
2-[(2-hydroxyethyl)(methyl)amino]ethan-1-ol
2-[2-hydroxyethyl(methyl)amino]ethanol
Bis(2-hydroxyethyl)methylamine
MDEA
Methyldiethanolamine
Methyldiethanolamine
N,N(Bis-2 Hydroxy ethyl) Methylamine
Methyl Diethanolamine (MDEA)
N-methyldiethanolamine
SYNONYMS:
N,N-BIS(2-HYDROXYETHYL)METHYLAMINE
N-METHYL-2,2'-IMINODIETHANOL
N-METHYL-2,2-IMINOBIS(ETHANOL)
N-METHYLDIETHANOLAMINE
N-METHYL-N-(2-HYDROXYETHYL)-2-AMINOETHANOL
METHYL DIETHANOLAMINE
MDEA
BIS(2-HYDROXYETHYL)METHYLAMINE
2-(N-2-Hydroxyethyl-N-methylamino)ethanol
2,2’-(methylimino)bis-ethano
2,2’-(methylimino)bis-Ethanol
2,2’-(methylimino)di-ethano
Diethanolmethylamine
Ethanol, 2,2'-(methylimino)bis-
Ethanol, 2,2'-(methylimino)di-
Ethanol,2,2’-(methylimino)bis-
Mdea (diol)
Methylbis(2-hydroxyethyl)amine
2,2'-METHYLIMINODIETHANOL
USAF DO-52
usafdo-52
N-Methyldiethanolami
FC MDEA
METHYL DIETHANLAMINE
N-Methylediethanolamine
ACTIVATED METHYL DI ETHANOL AMINE (MDEA)
MethylDiethanolamine(Mdea)
N-Methyldiethandamine
N-METHYLDIETHANOLAMINE (controlled chemical)
N-Methyldiethanolamin
N-Methyldiethanolamine, 98+%
2,2'-(methylimino)diethanol N-methyldiethanolamine
2,2μ-Methyliminodiethanol, N,N-Bis(2-hydroxyethyl)methylamine, MDEA
N-Methyl-N,N-diethanolamine
N-METHYLDIETHANOLAMINE, 99+%
Methyldiethanolamin
Methyliminodiethanol
N-(2-Hydroxyethyl)-N-methylethanolam
n,n-di(2-hydroxyethyl)-n-methylamine
N-Methylaminodiglycol
N-Methyl-di(-hydroxyethyl)amine
N-Methyldiethanolimine
N-Methylimino-2,2'-diethanol
N-Methyliminodiethanol
N-METHYLDIETHANOLAMINE (MDEA)
N-Methyldiethanolamine
N-Methyldiethanolamine (105-59-9)
2,2'-(Methylazanediyl)diethanol
UCARSOL NM-608(MethyldiethanolaMine)
N-METHYL-2,2'-IMINODIETHANOL FOR SYNTHES
2-[2-hydroxyethyl(methyl)amino]ethanol
N-Methyl-2,2'-iminodiethanol for synthesis
N-Methyl diethanolamine N-Methyldiethanolamine
N-Methyldiethanolamine ISO 9001：2015 REACH
105-59-9
N-METHYLDIETHANOLAMINE
105-59-9
Methyldiethanolamine
2,2'-(Methylimino)diethanol
Ethanol, 2,2'-(methylimino)bis-
Methyl diethanolamine
2-[2-hydroxyethyl(methyl)amino]ethanol
N-Methyliminodiethanol
2,2'-Methyliminodiethanol
N-Methyl-2,2'-iminodiethanol
N-Methylaminodiglycol
Bis(hydroxyethyl)methylamine
N-Methyldiethanolimine
USAF DO-52
N-methyl diethanolamine
N,N-Bis(2-hydroxyethyl)methylamine
Bis(2-hydroxyethyl)methylamine
Methylbis(2-hydroxyethyl)amine
Diethanolmethylamine
Methyliminodiethanol
Bis(2-hydroxyethyl) methyl amine
Ethanol, 2,2'-(methylimino)di-
591248-66-7
UNII-3IG3K131QJ
NSC 11690
N,N-Di(2-hydroxyethyl)-N-methylamine
2-(N-2-Hydroxyethyl-N-methylamino)ethanol
N-methyl-diethanolamine
3IG3K131QJ
N-Methylimino-2,2'-diethanol
Ethanol,2'-(methylimino)di-
Ethanol,2'-(methylimino)bis-
WLN: Q2N1 & 2Q
CCRIS 4843
EINECS 203-312-7
BRN 1734441
HSDB 6804
Mdea (diol)
methyl-diethanolamine
N-Methyldethanolamne
methyl diethanol amine
n-methyl-diethanol amine
N-methyl diethanol-amine
di(hydroxyethyl)methylamine
DSSTox_CID_5591
2-[(2-hydroxyethyl)(methyl)amino]ethan-1-ol
EC 203-312-7
DSSTox_RID_77844
DSSTox_GSID_25591
SCHEMBL17605
bis-(Hydroxyethyl)methylamine
4-04-00-01517 (Beilstein Handbook Reference)
N-Methyl-2,2-iminodiethanol
N-Methyldiethanolamine, 99%
