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US 7,029,553 B1Granted
Urea sulfate and urea hydrochloride in paper and pulp processing
AssigneePeach State Labs, Inc.
InventorsMichael S. Williams, R. Richard Sargent
Life of this patent
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Abstract
The present invention relates to the use of urea sulfate or urea hydrochloride, or both, in process streams in the paper and pulping industries to control pH, to bring about flocculation or precipitation of various materials, and to replace all or part of the sulfuric acid, hydrochloric acid, and/or papermaking alum used in the paper and pulping industries.
Claims6
A method of decreasing the amount of aluminum sulfate hydrate required by a pulping or papermaking process, comprising adding to a process stream or solution of said pulping or papermaking process an effective amount of urea sulfate.
Dependencies are inferred from the claim text.