Hi there,

I am synthesizing a material by a chemical route. At the last stage, the desired material precipitates in the aqueous solution, while it has a large volume because it's a hydrated material. I can remove the extra water by filtering and after that, I want to dry it to make it in a powdery form. But, the melting point of this material is near 60 C, and I cannot use higher temperatures (like 100 C) for drying. I have used lower temperatures (e.g. 50-55 C) to dry it in the oven, but after about 2 days, drying was not complete yet. I mean the drying procedure at these temperature ranges (about 50 C) takes too long, and cannot be cost-effective in the large scales.

Do you have any suggestion for drying this material in a simple way at shorter times?

Regards,

Boiling point of compound is not constant and depends also on pressure.

So you can try lowering pressure to boil excess of water.

It is widely used method:

https://en.wikipedia.org/wiki/Vacuum_drying

..with ready to use equipment:

https://www.google.com/search?q=Vacuum+dryer

(anyone serious about chemistry should have a vacuum pump anyway)

 

Edited September 22, 20205 yr by Sensei

Good suggestion

 

Thanks a lot

29 minutes ago, Sensei said:

Boiling point of compound is not constant and depends also on pressure.

So you can try lowering pressure to boil excess of water.

It is widely used method:

https://en.wikipedia.org/wiki/Vacuum_drying

..with ready to use equipment:

https://www.google.com/search?q=Vacuum+dryer

(anyone serious about chemistry should have a vacuum pump anyway)

 

 

20 minutes ago, Aminmed said:

Good suggestion

 

Thanks a lot

Agreed  +1

47 minutes ago, Aminmed said:

Hi there,

I am synthesizing a material by a chemical route. At the last stage, the desired material precipitates in the aqueous solution, while it has a large volume because it's a hydrated material. I can remove the extra water by filtering and after that, I want to dry it to make it in a powdery form. But, the melting point of this material is near 60 C, and I cannot use higher temperatures (like 100 C) for drying. I have used lower temperatures (e.g. 50-55 C) to dry it in the oven, but after about 2 days, drying was not complete yet. I mean the drying procedure at these temperature ranges (about 50 C) takes too long, and cannot be cost-effective in the large scales.

Do you have any suggestion for drying this material in a simple way at shorter times?

Regards,

I can dry a cotton towel at 20C, by simply hanging it on a washing line outside for a few hours.

Putting stuff in a closed box tends to inhibit drying- even if that box is called an oven- because there is nowhere for the water to go.
Fitting a vacuum pump to the box does address that issue, but is expensive (also, a lot of vacuum pumps are not designed to handle large volumes of water vapour).
 

Exposing the material, in a thin layer, to the atmosphere will let it dry just like  the towel...