US 9,810,104 B2
Waste heat recovery in a chemical process and plant, particularly for the synthesis of ammonia
Ermanno Filippi, Castagnola (CH); and Raffaele Ostuni, Milan (IT)
Assigned to Casale SA, (CH)
Filed by Ermanno Filippi, Castagnola (CH); and Raffaele Ostuni, Milan (IT)
Filed on Jul. 28, 2014, as Appl. No. 14/444,710.
Application 14/444,710 is a continuation of application No. 13/388,793, abandoned, previously published as PCT/EP2010/056750, filed on May 17, 2010.
Claims priority of application No. 09169330 (EP), filed on Sep. 3, 2009.
Prior Publication US 2014/0331672 A1, Nov. 13, 2014
Int. Cl. F01K 25/08 (2006.01); C01B 3/38 (2006.01); C01B 3/02 (2006.01); C01B 3/34 (2006.01); C01B 3/48 (2006.01); C01C 1/04 (2006.01); F01K 25/10 (2006.01)
CPC F01K 25/08 (2013.01) [C01B 3/025 (2013.01); C01B 3/34 (2013.01); C01B 3/382 (2013.01); C01B 3/48 (2013.01); C01C 1/047 (2013.01); C01C 1/0488 (2013.01); F01K 25/106 (2013.01); C01B 2203/0233 (2013.01); C01B 2203/0244 (2013.01); C01B 2203/0283 (2013.01); C01B 2203/0415 (2013.01); C01B 2203/0445 (2013.01); C01B 2203/0475 (2013.01); C01B 2203/068 (2013.01); C01B 2203/0811 (2013.01); C01B 2203/0833 (2013.01); C01B 2203/84 (2013.01); Y02E 20/326 (2013.01); Y02P 20/123 (2015.11); Y02P 20/124 (2015.11); Y02P 20/129 (2015.11); Y02P 20/52 (2015.11); Y02P 20/544 (2015.11); Y10T 29/49716 (2015.01)] 13 Claims
OG exemplary drawing
 
1. A process for the synthesis of a chemical product, comprising the steps of:
obtaining at least one make-up reactant in a front-end section;
reacting said least one make-up reactant in a synthesis section, obtaining said product in a high-pressure liquid state;
heating at least a portion of the liquid product delivered by the synthesis section by heat exchange with a waste heat source made available by said process, obtaining an expandable stream of said product in a vapour state or supercritical state;
expanding said expandable product stream to recover energy, obtaining an expanded product stream, and
condensing said expanded product stream by heat exchange with a suitable cooling medium, obtaining a product condensate stream; and
wherein a portion of the product condensate is pumped substantially at the same pressure of said synthesis section; said portion of the product condensate is then re-heated by heat exchange with said waste heat source or a further waste heat source; after said heating, said portion of product stream is then expanded to recover energy and condensed back to liquid, thus forming a closed loop.