Method of cleaning valves or lines
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United States of America Patent
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Mar 1, 2005
Grant Date -
N/A
app pub date -
Dec 17, 2001
filing date -
Jun 24, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Method of cleaning valves or lines through which hydrolysable polymers are transported at the operating temperature, in which, after the polymer stream has been shut off and the polymer has been evacuated as far as possible, steam is passed through the valves or lines to be cleaned while the operating temperature is maintained at plus/minus 10.degree. C., with the steam being introduced via hydrolysis valves set in the wall of the valve housing or the lines and discharged via emptying apertures.
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