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[GavJ]

Sort of a long shot, but is there some way to allow dwarves to collect salt laced water and specify it or the salt itself somehow as a reagent that works? I see that salt is a material token, but can't think of a way to get it to the workshop.

(My goal is a building that evaporates salt out of saltwater)

[Meph]

Not without dfhack. I requested a de-salination plant type plugin/script several times, but the general consens is that "a screw pump can filter water", ignoring that fact that I wanted to create salt.

So... no, not with raws.

[TheFlame52]

Well, I think the first step would be getting a script/reaction to accept spatter on an item as a reagent. Salt water is water coated in salt.

[Quietust]

There's also the issue that there is no way to order a dwarf to fill a bucket with salt water in the first place - the best you can do is build a Well over a pool of salt water, get a dwarf to drink from the well (which will succeed, for some reason, and also leave the well bucket with salt water in it), and then deconstruct the well.

Alternatively, you could run a minecart through a pool of salt water, but then you'd have to make your reaction accept minecarts as well as buckets...

[GavJ]

Hm... minecarts you say...

[Meph]

The steam engine plugin detects if water is under the workshop. If this could be done with salt-water, people could build a desalination plant that only works when build above salt-water, removing a unit of water for every time the reaction is run... it would work the same way, but instead of producing power it would produce a bucket/barrel of water, and a unit of sand (power_misc in a bag I would suggest)

[GavJ]

I imagine it would be fairly simple with dfhack.  Trying to come up with a way to use only raws. Especially this close to a release I feel discouraged from using scripts that I may not be able to even test or that may not even work again later for quite some time. Managed to solve almost everything else with raws only, too, and it's not worth breaking from that for this. I would sooner just only use rock salt.

Minecarts seem maybe feasible though. Can you make a reagent of "Salt in a minecart"  where the covering or whatever of salt on the water in the cart would qualify? If so, you could leave a stocpile of minecart, flood it with saltwater, close the gate, pump water back out, collect salty minecarts. Which although it sounds ridiculous, wouldn't actually be that different from how people really do salt evaporation!! And thus I might actually be cool with that. If it works.

[Meph]

There is no way for reactions to distinguish between salt water and fresh water.

[GavJ]

I mean just salt.
NONE:NONE:SALT:NONE 
in a minecart.

?

(is there an item token for contaminant? Or are they  just not items at all in which case I guess this wouldnt work?)

[Meph]

You cant target contaminants either.