Dispersant VS emulsifier

[mjoekingz28]

I am reading an do not understand the differences between these two.


dispersant-A dispersing agent, which holds a very finely divided substance in a dispersed state in the carrier fluid. Such as sludge or wear particles in a motor oil.




emulsifier- A substance used to promote or aid the emulsification of two liquids and to enhance the stability of the emulsion.

 

[Ethan1]

That's because your definition of emulsifier uses emulsion in the definition.

An emulsion is a liquid thoroughly mixed in another liquid.

 

[Jetronic]

a dispersant keeps solids in the mix, an emulsifier does the same with liquids

 

[ragtoplvr]

ever see salad dressing separate.

An emulsifier would keep the oil and vinegar mixed.

A dispersant would keep the spices suspended.

Rod

 

[mjoekingz28]

Thanks ragtoplvr!

 

[mjoekingz28]

Thanks Jetronic.

 

[JHZR2]

What kind of definition has the word in it???!?

While not necessarily definite, I look at dispersants as to ensure wetting of fine solids to prevent agglomeration, while emulsifiers ensure that there is no liquid-liquid equilibrium (i.e. all liquids are in one phase). I suspect that dispersants could be used to ensure fine liquid droplets of a second phase in a first phase (LLE), but I generally consider them as solids or at least high solids content.

 

[mjoekingz28]

The definition is from the old homepage from a screenshot I think YOU posted up!

 

[bunnspecial]

Originally Posted By: Ethan1
That's because your definition of emulsifier uses emulsion in the definition.

An emulsion is a liquid thoroughly mixed in another liquid.


Actually, that's not a correct definition.

An emulsion is a suspension of two otherwise insoluble liquids.

Otherwise, if you mix two liquids together where there is some solubility you have a mixture.

 

[Ethan1]

Originally Posted By: bunnspecial
Originally Posted By: Ethan1
That's because your definition of emulsifier uses emulsion in the definition.

An emulsion is a liquid thoroughly mixed in another liquid.


Actually, that's not a correct definition.

An emulsion is a suspension of two otherwise insoluble liquids.

Otherwise, if you mix two liquids together where there is some solubility you have a mixture.


Actually, you're conflating "mixed" with "dissolved".