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Title:
APPARATUS FOR UREA SYNTHESIS
Document Type and Number:
WIPO Patent Application WO/2006/118070
Kind Code:
A1
Abstract:
In an apparatus for synthesizing urea, it is avoided to pass downward a urea synthesis solution, which is a two-phase gas-liquid stream, and the stream is stabilized as such (i.e., as being the two-phase gas-liquid stream) to enable smoother operation, thereby lessening the flow resistance and reduce energy loss. Namely, an apparatus for synthesizing urea which comprises: a synthesis tube wherein NH3 is reacted with CO2 to give a urea synthesis solution containing urea, the unreacted NH3, the unreacted CO2 and water; a stripper whereby the urea synthesis solution is stripped by using at least a portion of the starting CO2 to thereby separate a gas mixture containing the unreacted NH3 and the unreacted CO2; a vertical submerge condenser which has a shell-and-tube structure and by which the above-described gas mixture is condensed into an absorption medium in the shell side under cooling with a cooling medium passing through the tube side; and a circulation means for circulating the liquid obtained from the condenser into the synthesis tube; wherein the synthesis tube is in the horizontal type and the pipe for feeding the urea synthesis solution from the synthesis tube to the stripper is located substantially horizontally and/or upward.

Inventors:
KOJIMA YASUHIKO (JP)
Application Number:
PCT/JP2006/308528
Publication Date:
November 09, 2006
Filing Date:
April 24, 2006
Export Citation:
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Assignee:
TOYO ENGINEERING CORP (JP)
KOJIMA YASUHIKO (JP)
International Classes:
C07C273/04; B01D3/00; B01D19/00; C07C275/00
Foreign References:
JP2003104949A2003-04-09
JP2002145850A2002-05-22
JP2002020360A2002-01-23
JPH11180942A1999-07-06
JPH10182587A1998-07-07
JPH10182586A1998-07-07
JPH10120643A1998-05-12
Other References:
See also references of EP 1876170A4
Attorney, Agent or Firm:
Miyazaki, Teruo (16th Kowa Bldg. 9-20, Akasaka 1-chome Minato-k, Tokyo 52, JP)
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