Method for treating condensates form polycodensates
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United States of America Patent
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Issued Date -
May 7, 2009
app pub date -
Feb 27, 2006
filing date -
Apr 15, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention relates to a method for treating vapours and condensates which arise during the production of polycondensates from bisphenols or high-value phenols by esterification and/or transesterification with alkyl or aryl esters of at least bivalent organic or inorganic acids. According to the invention, the treatment is carried out in a plurality of condensates and/or distillation columns which are connected in a step-by-step manner behind each other, each distillation column comprising a connected condensate. The dew point and the pressure in each condensate are adjusted such that in each step, monomers, oligomers or decomposition and transformation products are removed.
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