Urea sulfate and urea hydrochloride in paper and pulp processing
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United States of America Patent
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Apr 18, 2006
Issued Date -
N/A
app pub date -
Feb 22, 1999
filing date -
Jul 24, 1992
priority date (Note) -
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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.
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