xxxxx (Stranger)
05-09-04 16:08
No 505996
       1955 hydrazine patent     

there is a us patent from 1955 for production of hydrazine from urea and nickel or iron metal at 140c. supposedly these compounds react to form hydrazine and nickel or iron carbonyl. nickel is said to work best because at this temperature the nickel carbonyl decomposes to form nickel metal and carbon monoxide making the process truly catalytic
while 20% of the iron carbonyl does not decompose.
these metal carbonyls are volatile liquids five times more poisonous than hydrogen cyanide, so this is for reference only. but i would like to ask if the process works. could someone post the heats of formation for urea, hydrazine and nickel and iron carbonyl and/or explain why or why not the process would work. 		 
 
 
 
    java
(Hive Bee)
05-09-04 19:55
No 506024
       Ref. Hydrazine     

****  see....Post 379789 (WizardX: "Hydrazine Synth.", Stimulants)
We're  all in this world together,
http://www.aztlan.net 		 
 
 
 
    xxxxx
(Stranger)
05-11-04 18:27
No 506457
       is reaction thermodynamically favorable ?     

figures i have found on the web for urea -333.19 kj/mol, nickel 0 kj/mol to ni(co)4 -602.9 kj/mol, hydrazine +50.37. i think heat of formation figures are supposed to have three segments like so: A+/-(101.01) B+/-(1.0101 x degrees kelvin) C+/-(0.01010 x (degrees kelvin squared)) so reactions may be more or less favorable at higher or lower temperatures. 		 
 
 
 
    xxxxx
(Newbee)
05-21-04 21:28
No 508642
       us patent 2717201
(Rated as: use patent linking markup! See the FAQ!) 		    

patent number is us 2717201