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Dry Water

en.wikipedia.org

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Re: Dry Water

#51

Post by TimTheTinker »

tinus_hn wrote: post #23
tylerchilds wrote: post #13

The patent getting snatched up by cosmetics and then re-discovered almost 50 years later makes me wonder how many cool advancements have been lost to industries that couldn't find any value from them.

In many fields there are waves with the patent expiration cycle, for instance 3D printing or VR. As the patents expire there is a flurry of new research, everyone obtains new patents and it becomes impossible to create viable products again, until the patents expire and the cycle begins again.

That's very interesting, especially considering that patents were originally created to incentivize people to publish details of inventions so they could be publicly known and accessible in perpetuity.

To better uphold their original purpose, perhaps the patent rights period should be shortened to 6 years or thereabouts.

Re: Dry Water

#54

Post by spydum »

Splines wrote: post #39
djrogers wrote: post #24

Apparently one can make dry water with a blender - mix fine silica powder and water in a 1:19 ratio (by mass) and put it in a blender for a few minutes. I'm not going to risk my blender to try it, so who's first?

The only video I could find of the process: https://www.youtube.com/watch?v=bVAPUxSH_6Q I'd like to see someone interact with it - is it possible to get "wet" from dry water? Can you get the water back out?

Imagine you could press it through a filter of appropriate size to block the silicate but permit the water ?

Re: Dry Water

#56

Post by jamestimmins »

umvi wrote: post #48
jamestimmins wrote: post #42

"It can be used as a medium for volatile compounds, as materials stored within the dry water can be reduced to powder and stabilized – reducing not only the volatility of the substance, but also its weight for transport." Anybody know how it's possible that adding an additional substance to a chemical compound could decrease it's weight? Or does it just mean that less volatility means it can be transported in lighter…

Assuming it's referring to lowering the density. Powder is less dense than liquid.

But doesn't that just mean "It weighs less when you carry less"? That sounds like a truism.

Re: Dry Water

#57

Post by [deleted] »

semi-extrinsic wrote: post #32
bopbop wrote: post #15

Earlier quoted context omitted.

Sounds interesting - Do you have a link for that, or if you've got time could you explain?

There's a lot of literature on this; Wikipedia has a decent starting point: https://en.wikipedia.org/wiki/Carbon_sequestration#Geologica... TL;DR: if you compress CO2 to above 73 bar, it becomes supercritical fluid, which has a density almost like water and which does not mix with water. If we inject this fluid into underground saline aquifers, we can trap it indefinitely. Basically exactly the reverse of producing o…

[deleted]

Re: Dry Water

#59

Post by Someone »

jamestimmins wrote: post #42

"It can be used as a medium for volatile compounds, as materials stored within the dry water can be reduced to powder and stabilized – reducing not only the volatility of the substance, but also its weight for transport." Anybody know how it's possible that adding an additional substance to a chemical compound could decrease it's weight? Or does it just mean that less volatility means it can be transported in lighter…

I think https://www.soci.org/chemistry-and-industry/cni-data/2010/22... answers that:

Kept at -20°C, methane hydrate stores about as much methane per liter at room pressure as LNG in a compressed cylinder.

So, instead of a heavy LNG cylinder, I guess you can do with a Dewar flask.

Also, it seems it requires less energy and less time to create methane hydrate using dry ice.

It likely also is advantageous that this gives you a ‘fluid’ that you can easily pump around.

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