Lowering post-precipitation in merchant acid
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United States of America Patent
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Nov 19, 1991
Grant Date -
N/A
app pub date -
Nov 26, 1990
filing date -
Nov 26, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present process stabilizes merchant acid from bottoms solutions against post-precipitation by heating the acid to a temperature of at least about 180.degree. F. for about 12 to about 48 hours. The stabilized acid product exhibits less than about 1 wt % solids precipitation after even 14 days of standing at about 70.degree. F.
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