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Topic: Water density how to increase  (Read 878 times)

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Offline seza

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Water density how to increase
« on: March 15, 2021, 04:49:36 PM »
Hi All,

Great forum, a big thank you to all those that made it possible,

I hope you good people can help with my question .

Water density is apprx 1000Kgs/M3, adding salt will increase the density a bit,
is another way of increasing that further to say double or more?
I have read about Sodium Polytungstate but that prohibitively expensive,

Many thanks and keep up the good work.
 

Offline Borek

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Re: Water density how to increase
« Reply #1 on: March 15, 2021, 05:07:22 PM »
I doubt you will find anything cheap. Heavy solutions are kind of an industry standard for many applications and they have been researched to death.
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Offline seza

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Re: Water density how to increase
« Reply #2 on: March 15, 2021, 05:23:00 PM »
Thanks for your quick reply,
that is the impression I am getting from researching and googling the topic,
lets hope may be someone on here will suggest something?

Offline Orcio_Dojek

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Re: Water density how to increase
« Reply #3 on: March 15, 2021, 05:46:24 PM »
Sugar (sucrose) can easily increase density.

1 kg sucrose + 1 l water gives 1,65 l solution (density 1,21 kg / l).

1,5 kg sucrose + 1 l water gives 2 l solution (density 1,25 kg / l).

2 kg sucrose + 1 l water gives 2,3 l solution (density 1,30 kg / l).

But it is a short time effect, as within 2- 3 days solution will go bad, unless somehow conserved.
« Last Edit: March 15, 2021, 05:59:56 PM by Orcio_Dojek »

Offline Borek

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Re: Water density how to increase
« Reply #4 on: March 15, 2021, 05:51:07 PM »
Sugar (sucrose) can easily increase density.

Far from 2 g/mL OP asked for (not to mention viscosity problems which make such solutions unsuitable for most applications).
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Offline seza

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Re: Water density how to increase
« Reply #5 on: March 15, 2021, 06:41:33 PM »
Thank you for that,
I had sugar in mind I did not know the various concentrations,
I think viscosity for my application might be a problem,

Offline Orcio_Dojek

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Re: Water density how to increase
« Reply #6 on: March 15, 2021, 07:50:37 PM »
Sodium iodide and potassium iodide have very good solubilities (above 1,80 kg and 1,40 kg / litre at room temp.) and give solutions with density above 1,6 kg / l. I don't know about their viscosity.

Potassium iodide is slightly better, because both salts undergo oxidation, but solubility of the product of oxidation (KHCO3) is similiar while NaHCO3 can precitipate.

I found that silver nitrate also has very high solubility (2,5 kg / litre) and it's solution has density above 2 kg / l with low (compared to sucrose) viscosity.

« Last Edit: March 15, 2021, 08:18:32 PM by Orcio_Dojek »

Offline seza

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Re: Water density how to increase
« Reply #7 on: March 16, 2021, 02:24:53 PM »
Thank you all guys,
some ideas worth exploring.


Offline Enthalpy

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Re: Water density how to increase
« Reply #8 on: March 16, 2021, 05:29:38 PM »
Could it be a suspension instead of a solution? Then, the oilfield industry has everything you need. BaSO4 serves often, in ton amount it's cheap, at Merck it's 31€/100g.

I used MoS2 to densify a hydraulic liquid. Very fine powder (it serves as a dry lubricant), so it takes about a day to settle in an oily liquid. In water, it could take an hour.

Do you really need water? Liquids with 2000kg/m3 are common.

Offline seza

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Re: Water density how to increase
« Reply #9 on: March 18, 2021, 05:41:17 PM »
thanks Enthalpy,
def water is needed because of projected volume that could be millions of cubic meters,
I am going to start new topic, you are welcome to give me your thoughts there.

Offline pcm81

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Re: Water density how to increase
« Reply #10 on: May 06, 2021, 09:43:27 AM »
Not to be a dork, but i must add the following:
The ONLY way to increase density of the water is to cool it down to 4*C at which point it is the densest.
By adding other things to it you are creating a new mixture, so it is no longer the density of water that you are dealing with. If that is still a fair game, just add a bunch of sodium metasilicate to water. at 80*C you can dissolve 160 grams per 100ml, giving you 260/100=2.6g/ml overall density of the mixture...

Offline Borek

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Re: Water density how to increase
« Reply #11 on: May 06, 2021, 10:36:20 AM »
The ONLY way to increase density of the water is to cool it down to 4*C at which point it is the densest.

Not to be a dork, but applying pressure high enough to squeeze it into a smaller volume should do the trick as well ;)
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Offline pcm81

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Re: Water density how to increase
« Reply #12 on: May 06, 2021, 11:39:36 AM »
The ONLY way to increase density of the water is to cool it down to 4*C at which point it is the densest.

Not to be a dork, but applying pressure high enough to squeeze it into a smaller volume should do the trick as well ;)

You're right.

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