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US 10,968,144 B2Granted
Systems and methods for producing potassium sulfate
AssigneeMarsulex Environmental Technologies Corporation
InventorsMichael L. Mengel, Michael T. Hammer, Barry W. Stolzman
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Abstract
Systems and methods for producing potassium sulfate. Such a method involves providing an industrial waste material that includes at least one metal sulfate or a metal product that has been reacted with sulfuric acid to produce metal sulfates, and then reacting the metal sulfate with potassium carbonate to produce a byproduct that contains potassium sulfate.
Claims8
A method of producing potassium sulfate, the method comprising:
- providing an industrial waste material that includes at least one metal sulfate or a metal product that has been reacted with sulfuric acid to produce at least one metal sulfate;
- reacting the metal sulfate with potassium carbonate to produce a byproduct comprising potassium sulfate;
- separating and/or filtering the byproduct to remove metal carbonates therefrom and produce a filtered liquor;
- and
- refining the filtered liquor to produce solid potassium sulfate via a crystallization process.
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A system for producing potassium sulfate, the system comprising:
- an industrial waste material that includes at least one metal sulfate or a metal product that has been reacted with sulfuric acid to produce at least one metal sulfate;
- a source of potassium carbonate;
- a reaction tank adapted to react the metal sulfate with the potassium carbonate to produce potassium sulfate;
- a filter unit for separating a metal carbonate byproduct from the potassium sulfate to yield an aqueous potassium sulfate liquor;
- a crystallizer system adapted to remove water from the aqueous potassium sulfate liquor and form a slurry containing potassium sulfate crystals;
- and
- one or more units for condensing and drying the potassium sulfate crystals to yield a potassium sulfate product.
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Dependencies are inferred from the claim text.