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US 12,528,752 B2Granted
Integrated ammonia and sulfuric acid production plant and process
AssigneeChemetics Inc.
InventorRene Dijkstra
Life of this patent
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Abstract
Integrated plants and associated processes for producing ammonia and sulfuric acid have been developed comprising air separation and water electrolysis subsystems and which make surprisingly efficient use of the products from these subsystems (i.e. oxygen and nitrogen from the former and hydrogen and oxygen from the latter). The invention is particularly suitable for use as part of an integrated fertilizer production plant.
Claims16
An integrated plant for producing ammonia and sulfuric acid comprising:
- an air separation subsystem with an inlet for air and outlets for separated oxygen at a concentration greater than 90% by volume and separated nitrogen;
- a water electrolysis subsystem with an inlet for water and outlets for hydrogen from electrolysis and oxygen at a concentration greater than 90% by volume from electrolysis;
- an ammonia production subsystem with inlets for hydrogen and nitrogen and an outlet for ammonia wherein:
- the hydrogen outlet from the water electrolysis subsystem is fluidly connected to the hydrogen inlet of the ammonia production subsystem;
- and
- the nitrogen outlet from the air separation subsystem is fluidly connected to the nitrogen inlet of the ammonia production subsystem;
- and
- a sulfuric acid production subsystem with inlets consisting of an inlet for sulfur, an inlet for water, an inlet for oxygen fluidly connected to the oxygen outlet from the air separation subsystem, and an inlet for oxygen fluidly connected to the oxygen outlet from the water electrolysis subsystem;
- and an outlet for sulfuric acid, wherein the inlets for oxygen receive oxygen at a concentration greater than 90% by volume, and wherein:
- the oxygen outlet from the air separation subsystem is fluidly connected to the oxygen inlet of the sulfuric acid production subsystem;
- and
- the oxygen outlet from the water electrolysis subsystem is fluidly connected to the oxygen inlet of the sulfuric acid production subsystem.
9 more elements
Dependencies are inferred from the claim text.