How does DGA compare to MEA for gas treating?

DGA runs at higher solution strength, which means lower circulation rates and lower regeneration energy, plus lower vapour loss than MEA.

Yes — it removes carbonyl sulfide as well as H₂S and CO₂, an advantage over some amines.

What material of construction is used?

Carbon steel is standard; stainless steel is used for high-purity and E-GRADE service.

What solution strength is DGA run at?

Commonly 50 percent and above in water, against 15 to 20 percent for MEA. The higher strength is the main economic argument for DGA: less circulation, smaller equipment and lower regeneration duty for the same acid-gas removal. Acid-gas loading is still limited by corrosion, in practice to around 0.35 mole per mole.

Does DGA freeze in storage?

It can. DGA solidifies below roughly -12 °C, so tanks and lines in cold climates are normally traced or heated. It thaws without loss of quality.

Diglycolamine (DGA)

CAS 929-06-6 C₄H₁₁NO₂

CAS number: 929-06-6
EC number: 213-195-4
Formula: C₄H₁₁NO₂
Molar mass: 105.14 g/mol
Appearance: Essentially colourless, slightly viscous liquid; faint amine odour; water-miscible.

Diglycolamine is a primary alkanolamine that behaves chemically much like monoethanolamine but carries an ether linkage, which lowers its vapour pressure and allows it to run at far higher strength. Where an MEA unit typically circulates a 15 to 20 percent solution, DGA units run at 50 percent and above, so the same acid-gas duty moves less solvent through the plant and needs less heat to regenerate. It also picks up COS, which some amines leave behind. A high-purity electronic grade serves semiconductor photoresist stripping. Ehlinar supplies standard and electronic grades.

Applications

Gas treatingNatural-gas / refinery-gas sweetening — removes H₂S, CO₂ and COS at high solution strength (~50–60%)

BiogasUpgrading and acid-gas removal

Coatings & polymersEpoxy/PU curing and intermediate

MetalworkingCorrosion-inhibitor formulations, fluids and detergents

ElectronicsPhotoresist stripper solutions (E-GRADE)

Grades & packaging

Standard DGA Agent ≥98–99%; high-purity E-GRADE (electronic) for semiconductor stripper solutions.

218 kg (480 lb) drums
IBC
Bulk carbon-steel tank cars & stainless wagons with steam coils

How we supply

Supplier documentation on request

Certificate of Analysis (CoA), lot-specific where available
Safety Data Sheet (SDS / MSDS)
Technical Data Sheet (TDS)
Certificate of Origin / Certificate of Conformity

Quality assurance

Independent third-party inspection can be arranged on request, with the agency and scope agreed per trade. Representative samples can be requested for qualification, subject to supplier availability. We recommend incoming quality control against the agreed CoA.

Delivery & terms

Quoted on standard Incoterms (e.g. EXW, FOB, CIF, DAP) as agreed per trade. Delivery region, packaging and grade are confirmed per quote.

Documents and services above are subject to supplier availability and confirmed per quote; nothing here is an offer.

Typical / indicative values — not a binding specification

Property	Typical
Assay (standard DGA Agent)	≥98–99%
Assay (E-GRADE, electronic)	High-purity — confirm per grade CoA
Water solubility	Miscible
Typical solution strength (gas sweetening)	~50–60%

Also known as

DGA · DGA Agent / Diglycolamine Agent · Diethylene glycolamine · 2-(2-aminoethoxy)ethanol · ADEG

Frequently asked questions

How does DGA compare to MEA for gas treating?: DGA runs at higher solution strength, which means lower circulation rates and lower regeneration energy, plus lower vapour loss than MEA.
Does DGA remove COS?: Yes — it removes carbonyl sulfide as well as H₂S and CO₂, an advantage over some amines.
What material of construction is used?: Carbon steel is standard; stainless steel is used for high-purity and E-GRADE service.
What solution strength is DGA run at?: Commonly 50 percent and above in water, against 15 to 20 percent for MEA. The higher strength is the main economic argument for DGA: less circulation, smaller equipment and lower regeneration duty for the same acid-gas removal. Acid-gas loading is still limited by corrosion, in practice to around 0.35 mole per mole.
Does DGA freeze in storage?: It can. DGA solidifies below roughly -12 °C, so tanks and lines in cold climates are normally traced or heated. It thaws without loss of quality.

Enquire about Diglycolamine

Related products

Figures and identifiers here are compiled from public references and provided for general information; they are indicative, not a specification. See all products.