viagratrix
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Solubility issue
I'm planning to separate several chemicals from a paint wash liquid but i'm having problems with the solubilities of the chemicals, because they all
are soluble with water.
the chemicals are :
sodium hexametaphosphate
butyl diglycol
sodium dodecylsulfate
sodium hydroxide
1,2-Bentsisotiatsol-3(2H)-oni
sodium silicate
i can distill the butyl diglycol and sodium silicate isn't soluble with alcohols but the rest of the chemicals are a problem since i can't remember
how to separate them.
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diggafromdover
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SMS and SHMP are not typically pure - they are a mixture of closely related stearates and phosphates respectively, so even if you got it all out, it
would be a pyrrhic victory.
SDS melts around 200C. Evaporate to dryness and perhaps you can isolate the SDS by heating and filtering.
Another tack would be to first neutralize the hydroxide with dilute sulfuric acid to produce sodium sulfate, which is much less soluble and could
crystalize from the mother liquor as it is evaporated.
1,2-Bentsisotiatsol-3(2H)-oni is probably in very small concentration. Was this product made in Finland?
from wikipedia
SHMP hydrolyzes in aqueous solution, particularly under acidic conditions, to sodium trimetaphosphate and sodium orthophosphate.[12]
These are guesses.
[Edited on 26-2-2016 by diggafromdover]
[Edited on 26-2-2016 by diggafromdover]
Enjoying second childhood with REAL chemistry set.
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viagratrix
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yes this product is made in finland, i can link the msds for the product if it would help.
I don't really need or want anything except sodium hydroxide and butyl diglycol, and the rest are in very small concentrations
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