Ionic liquids are known for their unique properties that no
other chemical element possesses. They are recognized as green solvents. With
companies’ growing interest in this chemical, there is no doubt that it will certainly
become one of the most demanded in the industry. With different types of ionic
liquids present, their preparation, mechanism and limitations are also
different. Here are few limitations of different types of ionic liquids:
Traditional Ionic Liquid
Many investigations of ionic liquids include
N-alkyimidazolium, N-alkylpyridinium, N-alkylthiazolium etc. with anions such
as (F3CSO2)2N-, ZnCl3−
etc. The results of these combinations are micro-biphasic systems which are
composed of polar and non-polar domains. Usually, the use of these ionic liquid
combinations is discouraged as they might cause toxicity. The quality of ionic
liquids should always be considered for industrial purposes. Low quality ionic
liquids are influenced by impurities, and thus, should be avoided.
Additionally, since ionic liquids are quite an investment, quality should be
given importance in order to avoid financial loss.
Protic Ionic Liquid
In most cases protic ionic liquids are used as Mannich
reaction, protection reaction of aldehyde carbonyls, Biginelli condensation and
Friedlander annulations. One major advantage of protic ionic liquids is the
high yield (>99 wt%) which can be obtained economically with this method.
But this process should be performed by experts as it poses risk of quality
reduction. Quality reduction occurs due to extensive and strong acid
protonation processes. As a result, excess hydrogen ions are released which are
highly undesired.
Deep Eutectic Solvent
Due to its special properties, these ionic liquids are named
deep eutectic solvents. Possessing almost same characteristics and benefits as
of traditional ionic liquids, deep eutectic solvents possess very few limitations.
They are limited by the electrochemical reactions which are slower due to the
high viscosity of the electrolytes. While separating impurities from the
produced ions, the process should be monitored carefully. If the processed is
not properly supervised, impurities will not be removed and the process may
result in the production of low quality deep eutectic solvents.
Even though ionic liquids possess these limitations, their benefits are far more than their drawbacks. This is also evident with the increasing demand of ionic liquids in the chemical industry. If you’re looking for quality and affordable ionic liquids, contact
Watson International. In addition to this chemical, the company also offers
tipepidine hibenzate, Methylumbelliferyl alpha-D glucopyranoside, etc.
