Chemgineer
Hazard to Others
Posts: 216
Registered: 25-5-2021
Member Is Offline
|
|
Is there anything interesting I can do with Urea?
I've got too much of it!
|
|
XeonTheMGPony
International Hazard
Posts: 1640
Registered: 5-1-2016
Member Is Offline
Mood: No Mood
|
|
excellent fertilizer.
|
|
j_sum1
Administrator
Posts: 6334
Registered: 4-10-2014
Location: At home
Member Is Offline
Mood: Most of the ducks are in a row
|
|
Make hydrazine sulfate.
|
|
Jenks
Hazard to Others
Posts: 163
Registered: 1-12-2019
Member Is Offline
|
|
Or concentrated ammonia.
|
|
BromicAcid
International Hazard
Posts: 3253
Registered: 13-7-2003
Location: Wisconsin
Member Is Offline
Mood: Rock n' Roll
|
|
Ethylene carbonate
|
|
rockyit98
Hazard to Others
Posts: 283
Registered: 12-4-2019
Location: The Known Universe
Member Is Offline
Mood: no mood is a good mood
|
|
Making Graphitic carbon nitride (g-C3N4) from urea
https://www.sciencemadness.org/whisper/viewthread.php?tid=15...
"A mind is a terrible thing to lose"-Meisner
|
|
monolithic
Hazard to Others
Posts: 436
Registered: 5-3-2018
Member Is Offline
Mood: No Mood
|
|
Urea nitrate?
|
|
karlos³
International Hazard
Posts: 1520
Registered: 10-1-2011
Location: yes!
Member Is Offline
Mood: oxazolidinic 8)
|
|
Great to make amides from carboxylic acids.
|
|
DraconicAcid
International Hazard
Posts: 4356
Registered: 1-2-2013
Location: The tiniest college campus ever....
Member Is Offline
Mood: Semi-victorious.
|
|
Low-temperature eutectic solvents
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
|
|
karlos³
International Hazard
Posts: 1520
Registered: 10-1-2011
Location: yes!
Member Is Offline
Mood: oxazolidinic 8)
|
|
Sodium-/potassium cyanate by the reaction of it with sodium-/potassium carbonate/hydroxide?
|
|
student
Harmless
Posts: 9
Registered: 30-3-2018
Location: I will not say
Member Is Offline
Mood: Full of Love
|
|
Barbiturates. Nobody else wanted to say it but that is why I am here.
|
|
DraconicAcid
International Hazard
Posts: 4356
Registered: 1-2-2013
Location: The tiniest college campus ever....
Member Is Offline
Mood: Semi-victorious.
|
|
I did not know that was an option. And here I was, making esters and shaking them with ammonia like a chump.
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
|
|
karlos³
International Hazard
Posts: 1520
Registered: 10-1-2011
Location: yes!
Member Is Offline
Mood: oxazolidinic 8)
|
|
Our mackolol made a writeup on oleic acid to oleamide with urea(and boric acid) next door, you might need to register, but its good stuff: https://www.thevespiary.org/talk/index.php?topic=18728.0;top...
|
|
S.C. Wack
bibliomaster
Posts: 2419
Registered: 7-5-2004
Location: Cornworld, Central USA
Member Is Offline
Mood: Enhanced
|
|
AFAIK the usual directions (Vogel 3rd) either do not scale well or need improvement, and the method is overall rendered sucky by sublimation of
carbamate or whatever, on top of the gas evolution. Multiple bad things happen when heated above 195C.
When not used for explosives, it can be converted to nitrourea for semicarbazide or nitrous oxide.
Indirectly, urea has been used to decarboxylate amino acids to the parent amine.
|
|
draculic acid69
International Hazard
Posts: 1371
Registered: 2-8-2018
Member Is Offline
|
|
Is there a write-up for how to do this rxn anywhere? I think it will be useful for when I try to make some tertiary alcohols
|
|
BromicAcid
International Hazard
Posts: 3253
Registered: 13-7-2003
Location: Wisconsin
Member Is Offline
Mood: Rock n' Roll
|
|
Haven't seen a write-up. I did some work on it years ago and would be glad to see someone else take it on:
http://www.sciencemadness.org/talk/viewthread.php?tid=2948
|
|
Oxy
Hazard to Others
Posts: 140
Registered: 1-12-2020
Member Is Offline
|
|
Violuric acid can be made from barbituric acid.
|
|
njl
National Hazard
Posts: 609
Registered: 26-11-2019
Location: under the sycamore tree
Member Is Offline
Mood: ambivalent
|
|
Details!
Reflux condenser?? I barely know her!
|
|
S.C. Wack
bibliomaster
Posts: 2419
Registered: 7-5-2004
Location: Cornworld, Central USA
Member Is Offline
Mood: Enhanced
|
|
"It is said that" would have been the better choice for my wording.
https://www.sciencemadness.org/whisper/viewthread.php?tid=99...
BTW OS notes that urea is cheaper than cyanate for the synthesis of the easiest diazomethane precursor nitrosomethylurea (from methylamine), but few
readers may care.
|
|
draculic acid69
International Hazard
Posts: 1371
Registered: 2-8-2018
Member Is Offline
|
|
Diazomethane is a nasty animal indeed.
Anyone using or making it is batshit crazy.
I seen a bottle (4liter blue plastic) of the stuff
sitting on the driveway of a supply company one day.
I had read a few things that required diazomethane in there synths
and that's why I recognised this clearly labelled bottle. It was only layer
I was reading about diazomethane and it's hazards that I finally
realised what it was sitting away from anybody or the building by itself on the driveway. I remember my first thought upon seeing this was maybe I
could just help myself to this bottle of chemical they don't seem to want. I'm very glad I kept walking past it now.
|
|
Lion850
National Hazard
Posts: 517
Registered: 7-10-2019
Location: Australia
Member Is Offline
Mood: Great
|
|
Student, Oxy, How to go from urea to barbituric acid (so that I can then go on to violuric acid and violurates)? Thank you.
|
|
Boffis
International Hazard
Posts: 1879
Registered: 1-5-2011
Member Is Offline
Mood: No Mood
|
|
Quote: Originally posted by Lion850 | Student, Oxy, How to go from urea to barbituric acid (so that I can then go on to violuric acid and violurates)? Thank you. |
Diethyl malonate + urea + sodium ethoxide; check out Vogel's Textbook of organic chemistry. Both 3rd and 5th editions are available online.
|
|
S.C. Wack
bibliomaster
Posts: 2419
Registered: 7-5-2004
Location: Cornworld, Central USA
Member Is Offline
Mood: Enhanced
|
|
Vogel's is from OS, who in CV2 pg 60 mention other methods, all from urea.
Quote: Originally posted by draculic acid69 | Diazomethane is a nasty animal indeed.
Anyone using or making it is batshit crazy.
I seen a bottle (4liter blue plastic) of the stuff
sitting on the driveway of a supply company one day. |
It's hard to believe that anyone would offer a solution of it for sale. The precursors for it are more insidious poisons. Count me as batshit crazy
(if anyone hasn't already), since I plan on making some soon; following abnormal directions that are safer than usual. A relevant thread will be
started, if it goes well. This will be from acetyl methylurea, and there might be better directions than Vogel's for acetamide from urea coming as
well.
|
|
Praxichys
International Hazard
Posts: 1063
Registered: 31-7-2013
Location: Detroit, Michigan, USA
Member Is Offline
Mood: Coprecipitated
|
|
Urea and ammonium nitrate mixed and heated with a silica catalyst gives guanidine nitrate at about a 60% yield. This opens the door to tetrazoles
among other things.
|
|
ShotBored
Hazard to Others
Posts: 124
Registered: 19-5-2017
Location: Germany
Member Is Offline
Mood: No Mood
|
|
Agreed, deep eutectic solvents (DES) are cool! I made mine with urea and choline chloride. 2 part urea (MP 133C), 1 parts choline chloride (MP 302C)
creates a DES with a melting point of 12C! People have been using DES's for extracting precious metals from old batteries and stuff.
|
|