Method for producing a coarse-grained ammonium sulfate product via crystallization and installation for operating the method
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United States of America Patent
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Feb 25, 2014
Grant Date -
Sep 5, 2013
app pub date -
Feb 28, 2013
filing date -
Mar 1, 2012
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Abstract
Method for the production of a coarse-grained ammonium sulphate product by crystallization and installation for carrying out the method from an ammonium sulphate solution in a DTB type crystallizer having an internal suspension circuit and a clarifying zone, from which a clarified partial flow of solution is constantly drawn off into an external circuit, is heated in a heat exchanger to dissolve the solids contained therein and is guided back as a clear solution into the lower region of the crystallizer. A fine crystal suspension flow is drawn off from the clarifying zone as a further partial flow and guided back into the internal circuit of the crystallization stage without any previous dissolution of the solid proportion contained therein.
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