Chemical Forums
Specialty Chemistry Forums => Chemical Engineering Forum => Topic started by: yamshe on April 01, 2009, 10:46:59 AM
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Hey everyone
i m doing my project on "urea production through SNAMPROGETTI Ammonia stripping process"
Can anyone help me out in searching the detailed description, flow sheet diagram, material balnce etc
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http://www.wahchang.com/pages/outlook/html/bkissues/2006/Q1/Outlook_V27N1_HTML_060609/outlook_v27n1/outlook_v27n1.html
COMMON UREA PROCESSING CONDITIONS
Industrial urea production is accomplished at very high pressures and temperatures. In a typical urea process, carbon dioxide (CO2) and ammonia (NH3) are reacted under the conditions of 180ºC and 150 bar to produce ammonium carbamate (H2NCOONH4) as an intermediate product.
Snamprogetti utilizes the ammonia stripping process, depicted above. In the Snamprogetti process, excess NH3 is used to strip NH3 and CO2 from the decomposition of unconverted ammonium carbamate. This process usually occurs in a “stripper”, a vertical falling film heat exchanger, at a temperature of approximately 205ºC and pressure of about 150 bar. The insides of the tubes in the stripper are generally considered to have the worst corrosion issues.
Ammonium carbamate is the primary corrosive species in this environment. Very few materials can withstand ammonium carbamate in these conditions.
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http://typhoon2028
thank u so much i found it useful...
but the problem is this i did'nt find efficiency of "STRIPPER" & also the carbamate conversion in %...
this being the major problem going to creat hurdle in begining of material balance... :'(
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Hello yamshe,
You have touched on an area that is variable within the process itself. Many aspects of efficiency depend on variables that are difficult to design.
I think that this may be a good research project for someone to perform in the future, so that we can figure it out.
Good question!
Eugene