Treat with molecular sieve (not very good way) and distillation with additives(for dry reactions).
Dear Sunil,
there are many different techniques to remove water: it depends from the amount of water and from the solvent or compound you are trying to dry.
Some more information may be useful.
It depends upon which solvent you are using for eg. If you want to remove water from ethyl acetate or hexane or DCM. For that you can use some drying agents which will not interfere with your further process like you can add either anhydrous sodium sulfate or magnesium sulfate, shake it and keep it aside for 15-20min then you can collect your solvent.
PS. Don't forget to cover the lid during this process.
Please specify the nature of the organic liquid like density, boiling point, miscibility.
Then I can recommend some possible means
Dear Sunil Kumar thank you for this interesting technical question. It depends on what you mean by "organic liquid". There are various techniques available to dry organic solvents prior to use. Another case is the drying of extracts during the work-up procedures of an organic reaction.
In addition to the very useful links provided by Carlos F. Marcos
please also have a look at this overview:Solvents Drying and Drying Agents
(see attached pdf file)
The techniques we can use to remove water from an organic liquid
1) Vacuum distillation
2) Lipolization
3) Azeotropic distillation
4 )Solvent extraction
Mr. Sunil Kumar,
De-waterating can be followed through either mechanical or chemical means based on the nature of component/compound.
This is a very generic question for which a lot of answers are possible.It depends from the organic liquid you want to dry. Even organic liquids not miscible with water contain some water after separation of organic and aqueous layers. In most cases the water residues in the organic liquid can be removed with anhydrous salts (not reacting wit the organic compound) e.g. sodium, potassium or magnesium sulfates, calcium chloride,... followed by filtration. Ethers are efficiently dried over sodium strips (using benzophenone indicator that turns blue when water is absent due to the formation of the kethyl radical anion) and distilled. In some cases molecular sieves can also be used...
But, for each case the most appropriate drying agent should be chosen.
Hi sunil,
This is ageneral Question and requir broad Answer, many methods were employed to separation of water from organic liquids:
1-fractional distillation. In this case the differance of boiling point must be more than 20 degree
2- suitable dessicant agent such as MgSO4, CaCl2, Na2SO4. P2O5... etc
3-molecular sieve is a material with pores (very small holes) of uniform size. These pore diameters are similar in size to small molecule.
4-some organic liquids drying by sodium such as benzen
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