Methylamine Technology

Methylamine Technology
Davy Process Technology’s Methylamines technology originates
in the 1960s with the Leonard Process Company of USA. We
acquired the Amine technology rights in 2000 from Acid Amine
We have used our considerable expertise in developing new
technologies towards the enhancement of this mature technology
with particular emphasis on improved safety, reduction of fugitive
emissions, reduction of effluents and improved product quality
coupled with more cost effective design and reduced operating
cost (feed and energy).
Our position as the world’s leading licensor of methylamines
technology has been demonstrated by the successful commercial
operation of the latest world scale plant, demonstrating
exceptional product quality for Methylamines.
Our Amine Technology Portfolio includes:
Methyl Amines (MA)
Monomethylamine (MMA)
Dimethylamine (DMA)
Trimethylamine (TMA)
Dimethylformamide (DMF)
from DMA
Choline Chloride (ChCl)
from TMA
N-Methyl-2-Pyrrolidone (NMP) from MMA
We are confident that we can provide a professional tailormade Basic Engineering Package to enable a client to make a
smooth transition to Detail Engineering.
Methyl Amines (MA) Process
MA Product Flexibility
Methylamines are primarily used as intermediates in the production of pesticides, solvents, surfactants, and rubber processing chemicals.
Methylamines are the major feedstock for the production of alkyl alkanolamines. They are also used in pharmaceuticals, explosives,
agricultural and chemical markets, and water-treatment areas.
Monomethylamine (MMA) Uses
Mono methylamine is a feedstock for N-Methyl-Pyrrolidone (NMP) as well as for
carbamate insecticides and surfactants. MMA is also used in the manufacture of
Methyldiethanolamine (MDEA) for gas treating and for making Dimethylurea which is
used for making synthetic caffeine.
Dimethylamine (DMA) Uses
Dimethylamine is mostly used for manufacturing
Dimethylformamide (DMF) and Dimethylacetamide (DMAC)
as well as detergents such as fatty amines and Lauryl
Trimethylamine (TMA) Uses
The major use of Trimethylamine is in the manufacture of the
animal feed supplement, Choline Chloride.
MA Process Schematic
Lights Purge
A schematic flowsheet of our
Methylamine process.
Waste Water
Methylamines (MA) are produced by reacting ammonia with methanol at an elevated temperature in the presence of
a catalyst. Most of the exothermic reaction heat is used in the feed heat recovery system. A mixture of three amines is formed,
Monomethylamine (MMA), Dimethylamine (DMA) and Trimethylamine (TMA). They are separated and purified by distillation.
By adjustment of the reactor feed ratio (methanol to ammonia) and recycling excess amines, the desired final product slate of
Mono:Di:Tri methylamines can be achieved.
By-product formation and degradation of the products to light ends is
minimised by use of high quality raw material feedstock
and state-of-the-art catalyst.
A simplified set of the equilibrium chemical reactions for the formation of
mono, di and trimethylamine are shown right.
The reverse reactions of amines to form other amines occurs by a set of
Disproportionation or Transmethylation reactions as shown below:
(CH3)2NH + NH3
CH3NH2 + (CH3)3N
(CH3)3N + NH3
TMA + Ammonia
CH3NH2 + (CH3)2NH
Methanol + Ammonia
CH3NH2 + H2O
MMA + Water
Methanol + MMA
(CH3)2NH + H2O
(CH3)3N + H2O
Methanol + DMA
Crude MA product is purified by firstly separation and recycle to
synthesis of excess ammonia. Extractive distillation using recycled
water produces pure anhydrous TMA, followed by water separation to
produce a water free MMA/DMA mix, which is then separated into pure
anhydrous MMA and DMA.
Methanol recovery is used to improve process efficiency and extend
catalyst life by allowing greater methanol slip from the synthesis
Anhydrous MMA, DMA and TMA can be diluted with water to produce
aqueous product solutions.
MA Commercial Status
Our Methylamine plants are of world scale capacity varying in size
from 8,800 to 50,000 tonnes per year of mixed methylamines.
MA Process Benefits
Davy Process Technology’s Methylamine Technology builds on an
established process that has been commercially operated for over
50 years and offers the following features:
Most extensively licensed process in the world.
Proven and reliable design produces class leader
product qualities.
Large capacities available in a single train.
Highly flexible technology allows plant to be designed to give
optimal product slates with the ability to be adjusted online to match
future requirements.
Highly efficient, high activity and low by-product catalyst.
Optimised heat integration for improved efficiency and reduced operating costs.
Low environmental impact including numerous features to prevent atmospheric emissions.
For further details please contact:
Davy Process Technology
10 Eastbourne Terrace
London W2 6LG
Tel: Fax: Mail:
+44 (0)20 7957 4120
+44 (0)20 7957 3535
[email protected]
Davy Process Technology is a Johnson Matthey company.