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Specialty Chemistry Forums => Chemical Engineering Forum => Topic started by: gumusonur on December 03, 2020, 05:22:33 AM

Title: urea solutıon problem
Post by: gumusonur on December 03, 2020, 05:22:33 AM

hi everyone,

you know Adblue?
they says Adblue include 32,5 urea in deinozed water. but ı cant believe. in this case, the price they sell is not appropriate.

ı tried. ı have a %46 urea (Solid). how can ı do %32.5 urea solution from this product? i cant solve.

Title: Re: urea solutıon problem
Post by: AWK on December 03, 2020, 05:39:40 AM

Did you know that Adblue contains urea of ​​the highest purity?

Title: Re: urea solutıon problem
Post by: gumusonur on December 03, 2020, 05:46:11 AM

you can see following link.

https://www.total.co.uk/adblue-what-made-how-work#:~:text=AdBlue%C2%AE%20is%20made%20of,before%20it%20enters%20the%20atmosphere.

ı dont know. do you believe this product include %32,5 urea?

Title: Re: urea solutıon problem
Post by: AWK on December 03, 2020, 06:00:28 AM

46% (nitrogen content) of urea contains about 98.5% of urea and almost 1.5% of impurities, mainly anti-caking additives.
Saving can be expensive.

Title: Re: urea solutıon problem
Post by: gumusonur on December 03, 2020, 06:05:35 AM

so, i have %98,5 Urea and this urea include %46 N?
I am sending it in the attachment. sorry for not clear.

Title: Re: urea solutıon problem
Post by: AWK on December 03, 2020, 06:27:17 AM

You urea contains a guaranteed content of 46.33% N which corresponds to the purity of urea 99.3%
https://primerdigital.com/tools/UniDilution.html
On your own responsibility!

Title: Re: urea solutıon problem
Post by: gumusonur on December 03, 2020, 08:31:01 AM

thanks for reply.

Title: Re: urea solutıon problem
Post by: Babcock_Hall on December 03, 2020, 09:41:21 AM

This may not be relevant, but if you need the urea to be free of ammonium cyanate (which is in equilibrium with urea), you can use a mixed-bed ion-exchange resin to remove the ions.  The solution can be checked by conductivity.

Title: Re: urea solutıon problem
Post by: gumusonur on December 04, 2020, 06:14:04 AM

thanks Babcock_Hall.
on the other hand,  what should be the conductivity of the urea solution? Is conductivity important to prevent collapse?

Title: Re: urea solutıon problem
Post by: Babcock_Hall on December 04, 2020, 08:48:34 AM

http://www.bio-rad.com/webroot/web/pdf/psd/literature/LIT205.pdf

With respect to your first question, 6 M urea can be reduced from 70 µmho/cm to 0.2 µmho using the column method (see Table 3 in the link).  The batch method does not look as effective.  I don't know the answer to your second question.  Biochemists like to remove cyanate from urea because it reacts with lysine side chains in proteins; in other words, conductivity is not the issue itself, only a measurement tool.  I hope that some of this is useful information to you, but I am concerned that I might be going off on a tangent.

Title: Re: urea solutıon problem
Post by: gumusonur on December 07, 2020, 01:19:14 AM

thanks : )