Treated lignosulfonates as additives for cementitous systems
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United States of America Patent
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Issued Date -
Aug 12, 2004
app pub date -
Feb 6, 2003
filing date -
Feb 6, 2003
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Abandoned
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Abstract
A process for preparing a lignosulfonate additive for use as a dispersant in cement or concrete compositions comprises treating a lignosulfonate solution with salts of trivalent metals. Preferably, such salts comprise nitrates or sulphates of aluminum, iron, copper, or manganese.
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