Stamicarbon B.v.

Johan Albert Arno Van Den Tillaart

Ronny Albert Mathijs Pustjens

Jozef Hubert Meessen

Eelco Mostert

Filip Nilsson

Hans T Karlsson

Johanna Eliasson

Frida Ojala

Ylva Eriksson

David Holmström

P Christian Hulteberg

David HOLMSTRÖM

A urea plant and urea production process of the stripping type are provided that are adapted for making Diesel Exhaust Fluid (DEF) or precursor thereof in a DEF production unit downstream of a treatment section. The treatment section receives a part of the urea synthesis stream from a reaction zone, in particular bypassing the HP stripper.

Stripping-type urea plant for def production

Embodiments of the disclosure pertain to a chemical reactor comprising a mixing zone comprising first static mixer and a second static mixer both arranged in shell of the reactor, wherein the second static mixer is positioned further from said first inlet than said first static mixer, wherein the second static mixer is adapted for more intimate mixing of fluids in the reaction mixture than the first static mixer.

Chemical reactor with internal static mixers

Processes and plants for the production of purified urea solution are described. In a described urea production process, urea is produced in a synthesis section without a high pressure stripper and the urea solution is subjected to purification after the recovery section, to give purified urea solution and off-gas. The purification comprises e.g. steam stripping.

Urea production process and plant

Method for the production of urea from ammonia and carbon dioxide in a urea plant containing a high-pressure synthesis section with a horizontal pool condenser, wherein the method comprises exchanging heat from a high pressure process medium received in a shell section of the pool condenser to a medium pressure urea containing solution received in a first heat exchanging section provided in the pool condenser to at least decompose ammonium carbamate into NHand CO, wherein the method further comprises exchanging heat from the high pressure process medium to a low pressure steam condensate received in a second heat exchanging section provided in the pool condenser to produce low pressure steam. The invention also relates to an apparatus for the production of urea from ammonia and carbon dioxide.

Method and apparatus for the production of urea from ammonia and carbon dioxide

Disclosed is a method for the removal of ammonia from the off-gas of a finishing section of a urea production plant. The method comprises contacting the off-gas with a solid adsorbent capable of physically adsorbing ammonia, particularly activated carbon or zeolite. Thereupon the solid adsorbent having ammonia adsorbed thereon is separated from the gas and regenerated by dissolving ammonia in an extraction liquid, preferably water. After separating the water from the solid adsorbent, the latter is re-used in the process.

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Sittard, Netherlands

Johan Albert Arno Van Den Tillaart