Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Reexamination Certificate
2006-04-24
2009-08-25
O'Sullivan, Peter G (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
C564S067000, C564S069000, C564S070000, C564S071000, C564S072000, C422S186220, C422S186220, C422S198000, C422S198000, C422S198000, C422S198000, C422S198000, C422S198000
Reexamination Certificate
active
07579502
ABSTRACT:
It is intended to enable more smooth operation in an apparatus for synthesizing urea by circumventing the downward flow of a urea synthesis solution which is a gas-liquid two-phase flow and stabilizing the flow of the urea synthesis solution still remaining the gas-liquid two-phase flow and to reduce energy loss by giving smaller flow resistance. The present invention provides an apparatus for synthesizing urea including: a synthesis reactor for reacting NH3with CO2to obtain a urea synthesis solution containing urea, unreacted NH3, unreacted CO2, and water; a stripper for stripping the urea synthesis solution with use of at least a part of raw material CO2to separate a gas mixture containing the unreacted NH3and the unreacted CO2; a vertical submerged condenser having a shell and tube structure for condensing the gas mixture in an absorbing medium on the shell side while cooling the gas mixture with a cooling medium passing through the tube side; and recycling means for recycling a liquid obtained from this condenser to the synthesis reactor, wherein the synthesis reactor is a horizontal type, and wherein piping for sending the urea synthesis solution from the synthesis reactor to the stripper runs substantially horizontally and/or upward.
REFERENCES:
patent: 5936122 (1999-08-01), Kojima et al.
patent: 6093850 (2000-07-01), Kojima et al.
patent: 6518457 (2003-02-01), Sakata et al.
patent: 2002/0004612 (2002-01-01), Fukunaka et al.
patent: 2002/0082451 (2002-06-01), Yoshida et al.
patent: 59-122452 (1984-07-01), None
patent: 10-120643 (1998-05-01), None
patent: 10-182586 (1998-07-01), None
patent: 10/182587 (1998-07-01), None
patent: 11-180942 (1999-07-01), None
patent: 2002-20360 (2002-01-01), None
patent: 2002-145850 (2002-05-01), None
patent: 2003-104949 (2003-04-01), None
patent: WO 00/00466 (2000-01-01), None
patent: WO 00/43358 (2000-07-01), None
patent: WO 01/72700 (2001-10-01), None
Knobbe Martens Olson & Bear LLP
O'Sullivan Peter G
Toyo Engineering Corporation
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