Any Chemical Engineers Can Advise on Soda Ash?

BIGEYE · science forum beginner Joined: 25 May 2005 Posts: 31

We have a soda ash mixing plant that we want to use to make up batches of
soda ash solution, and use this for pH control.
The mixing plant consists of 2 x 900 litre tanks fitted with electric
mixers.
We will fill each tanks with 900 litres water, then add about 200 kg of
dense soda ash powder to each tank. This gives a solution pH of about 11.8
when mixed.
Can anyone advise how long this solution should be mixed to ensure that the
powder is completely dissolved.
Also, once the solution is mixed, if it is not used for some time and just
sits in the tanks, can the soda ash re-crystallise and settle out in the
bottom of the tank?
Appreciate any advice.

john.spevacek@aspenresear · science forum beginner Joined: 10 May 2005 Posts: 36

I can't advise you on the full matter, but clearly the answers will
depend on the mixers, the blades, the mixer speed, the rate of addition
of the ash, water temperature and maybe a few other things.

Experiment first on a small scale to learn a few basics and scale up
from their.

John
Aspen Research, - www.aspenresearch.com
"Turning Questions into Answers"

Opinions expressed herein are my own and may not represent those of my
employer.

Jerry Avins · science forum Guru Joined: 03 May 2005 Posts: 534

BIGEYE wrote:

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