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Specialty Chemistry Forums => Citizen Chemist => Topic started by: anthell on September 30, 2016, 11:04:00 PM

Title: Reaction between glycerol and HCL
Post by: anthell on September 30, 2016, 11:04:00 PM
I am wondering what happens if i mix them, if any...
I tried looking it up but i cant seem to get an answer... Some say it gets very violent and exothermic reaction while some say nothing happens
Can anyone help with that please?

Also, let say nothing happens and they just becomes a mixture... is it possible to bring it to 125C, around 15C above the boiling point of HCL?
Will it boil at 110C and only when the water is all gone then it rises again? if so, what happen to the HCL gas? does it dissolve in the glycerol?

Please help me out.. thx



Title: Re: Reaction between glycerol and HCL
Post by: AWK on October 01, 2016, 02:13:52 AM
Reaction of glycerol with concentrated water solution HCl is performed using water bath and gives mainly monosubstituted products (both isomers).
So forget about violent and exothermic reaction.
Title: Re: Reaction between glycerol and HCL
Post by: anthell on October 01, 2016, 04:28:36 AM
Oh wow thx, so they do react...

What about when i heat it up to around 150C?

Will the HCL escape? or has it reacted with the glycerol and something else happens?

thx
Title: Re: Reaction between glycerol and HCL
Post by: AWK on October 01, 2016, 12:13:58 PM
Quote
What about when i heat it up to around 150C?
At what pressure?
Warming on the water bath (~100 C) under reflux condenser is just for keeping HCl in the reaction mixture.
Title: Re: Reaction between glycerol and HCL
Post by: Intanjir on October 01, 2016, 01:32:49 PM
https://en.wikipedia.org/wiki/3-MCPD (https://en.wikipedia.org/wiki/3-MCPD)
Title: Re: Reaction between glycerol and HCL
Post by: anthell on October 01, 2016, 01:59:57 PM
Quote
What about when i heat it up to around 150C?
At what pressure?
Warming on the water bath (~100 C) under reflux condenser is just for keeping HCl in the reaction mixture.

at room temperature sir.
Is it even possible to raise the mixture to those numbers with the water evaporating?

https://en.wikipedia.org/wiki/3-MCPD (https://en.wikipedia.org/wiki/3-MCPD)

oh my good that is scary, luckily i am not trying to make anything thats edible
Title: Re: Reaction between glycerol and HCL
Post by: AWK on October 01, 2016, 02:50:00 PM
Quote
at room temperature sir.
There is some kind of misunderstanding between us. You ask about temperature of 150 C. At this temperature solution will boil at higher pressure.
HCl forms azeotropic mixture with water and boiling temperature of solution at atmospheric pressure will be constant (108.6 C).
Title: Re: Reaction between glycerol and HCL
Post by: anthell on October 02, 2016, 06:42:42 AM
Quote
at room temperature sir.
There is some kind of misunderstanding between us. You ask about temperature of 150 C. At this temperature solution will boil at higher pressure.
HCl forms azeotropic mixture with water and boiling temperature of solution at atmospheric pressure will be constant (108.6 C).

sorry for the misunderstanding, what im trying to say is... while the HCL solution boils at 108C, will the glycerol rises or stay at 108C as well?
Title: Re: Reaction between glycerol and HCL
Post by: AWK on October 02, 2016, 06:59:38 AM
Vapor pressure of glycerin at 108 C is rather low (~1mm Hg)