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Ethanolamines

TECHNOLOGY FOR THE PRODUCTION OF ETHANOLAMINES


PROCESS FEATURES
In the CONSER process ethanolamines are produced by the non catalytic reaction of ethylene oxide with aqueous ammonia.
The process is characterized by a high degree of flexibility, resulting in the possibility of producing monoethanolamine (MEA), diethanolamine (DEA) and triethanolamine (TEA) of high quality with a wide range of product distribution.
Due to the flexibility it is possible to tailor the design and operation of the plant to maximize the desired product as per market requirements.


REFERENCES
CONSER has developed the ethanolamine technology in cooperation with SULZER CHEMTECH (Switzerland).
The combined experience of CONSER and SULZER includes partial or complete design of amines projects for the following:

Company Location Company Location
HULS  Germany  I.C.I. Great Britain
BASF  Germany  OXITENO Brazil
SHELL Great Britain TECHCORP Iraq
NIHON Japan J.C.I.G. China
NAPHTHACHEMIE  France  FUSHUN  China
BRAZI  Romania OUCC  Taiwan

 

FLOWSHEET

ETHANOLAMINES


PROCESS DESCRIPTION
The ethanolamine technology of CONSER consists of the following main steps:
• Reaction
• Ammonia recovery and concentration
• Purification

Reaction
Monoethanolamine (MEA), Diethanolamine (DEA) and Triethanolamine (TEA) are produced by the non catalytic reaction of ethylene oxide with ammonia in aqueous solution.
Products distribution may be controlled by proper choice of the ethylene oxide/ammonia ratio in the reaction feed.
The higher the ratio of ammonia to oxide, the higher will be the amount of MEA in the reactor product.
MEA, DEA and TEA distribution in the reactor product can be also modified by recycling some MEA and/or DEA to the reactor.

Ammonia recovery and concentration
The reactor effluent flows to an ammonia stripper where the excess ammonia is separated from the solution. The overhead vapors of the stripper are cooled and condensed and then fed to an ammonia absorption column. Fresh ammonia makeup is fed into the absorption column and both streams form the aqueous ammonia feed to the reactor.
The ammonia free amines, in aqueous solution, are fed to an evaporation system where most of the water is removed. The water is recovered for use in the ammonia absorber.

Purification
The raw amines are fed to a drying column where the last fraction of water is removed.
The dried amines are then separated in a series of distillation columns which produce the final mono-, di- and tri-ethanolamine products.

PRODUCT APPLICATIONS

 

 

 

 

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