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I have a doubt, kindly clarify. The distillation technique most suited for separating glycerol from spent-lye in the soap industry is :

The distillation technique most suited for separating glycerol from spent-lye in the soap industry is :

  • Option 1)

    Simple distillation

  • Option 2)

    Fractional distillation

  • Option 3)

     Steam distillation

  • Option 4)

    Distillation under reduced pressure

 
Answers (1)
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V Vakul

As we learnt ,

 

Distillation under reduced pressure -

This method is used to purify liquid having high boiling points and decomposes below their boiling point.

-

 

 Glycerol is high boiling liquid with boiling point 290oC . It can be separated from spent lye by the method of distillation. In this method , liquid is made to boil at lower temperature than its normal temperature by lowering the pressure on its surface. As external pressure is reduced , then boiling point of the liquid lowers.

 


Option 1)

Simple distillation

Option 2)

Fractional distillation

Option 3)

 Steam distillation

Option 4)

Distillation under reduced pressure

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