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Fine Chem Trading (UK) - Supplier IN3090

Methyldiethanolamine (MDEA)

Country of Origin: China
Please send your enquiries to: sales@chemfinder.co.uk

Product Information

Product Name: Methyldiethanolamine
CAS: 105-59-9
Chemical Formula: C5H13NO2
Molecular Weight: 119.1
Description: A clear, water-white, hygroscopic liquid with an ammoniacal odor.

Physical Properties

Boiling point, ° C: 247.3
Flash point, PMCC, ° F: 240
Freezing point, ° C ( ° F): -21 (-5.8)
Specific gravity, 20/20 ° C: 1.0431
Vapor pressure, 20 ° C, mm Hg: <0.01
Viscosity,100 ° F, cSt: 36.8
Water solubility, in water: Complete
Water in: Complete
Weight, 20 ° C, lb/gal: 8.69

Product Usage

MDEA absorbs carbon dioxide and hydrogen sulfide at lower temperatures and release the acid gases at higher temperatures. Used in processes of separation of carbon dioxide and hydrogen sulfide from gas streams.

MDEA is in tail gas treating and hydrogen sulfide enrichment units for selectively removing hydrogen sulfide from gas streams containing carbon dioxide. It will permit 60 to 80% of the carbon dioxide to remain in the treated gas stream.

MDEA is 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 MDEA when the CO2 :H2S ratio ranges from 100 to 1,000.

Other uses include urethane catalyst, textile softeners, pH control, epoxy resin curing agents.

STORAGE AND HANDLING

The solvent and alkaline properties of MDEA should be considered when using handling and storage facilities.

MDEA will react with copper to form complex salts, so the use of copper and alloys con- taining copper should be avoided. Carbon steel storage tanks, constructed according to a recognized code, are generally satisfactory. Carbon steel transfer lines, at least 2 inches in diameter and joined by welds or flanges, are suitable. Screw joints are subject to failure unless back-welded Because MDEA will leach conventional pipe dopes.

Centrifugal pumps are preferred with methyldiethanolamine, although carbon steel rotary pumps can be used. Rotary pumps should be equipped with externally lubricated bearings.

SAFETY MEASURES

MDEA is considered slightly toxic by single oral dose and practically nontoxic in single dermal application. The oral LD 50 value in the rat is 4.78 g/kg and the dermal LD 50 value in the albino rabbit is 6.24 g/kg.

MDEA is moderately irritating to the eyes, but only slightly irritating to the skin. It is not corrosive under the conditions of the DOT corrosivity test and is not regulated as a hazardous material for transportation purposes. Because of the low vapor pressure of methyldiethanolamine, exposure to vapors is not expected to present a significant hazard under normal workplace conditions.

When handling MDEA chemical-type goggles must be worn. In addition, exposed employees should exercise reasonable personal cleanliness, including washing exposed skin areas several times daily with soap and water.

Should accidental contact with the eyes occur, flush them thoroughly with water for at least 15 minutes and get medical attention. Wash exposed skin areas with soap and water.