Compositions – Preservative agents – Anti-corrosion
Patent
1992-09-01
1994-01-04
Lovering, Richard D.
Compositions
Preservative agents
Anti-corrosion
25218313, 252311, 528196, B01J 1300
Patent
active
052757587
ABSTRACT:
The invention relates to ultrafine suspensions of bisphenol, sodium hydroxide and water for the production of polycarbonates by the two-phase interfacial process. According to the invention, these suspensions are prepared by cooling bisphenolate concentrations near the solubility limit in aqueous sodium hydroxide with intensive mixing at relatively high temperatures and precipitating bisphenolate or more bisphenolate in the form of fine droplets during the cooling process. The ultrafine suspensions provide for a high volume/time yield in the interfacial reaction.
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Hable Konrad
Heuser Jurgen
Kadelka Jurgen
Schomacker Reinhard
Weymans Gunther
Bayer Aktiengesellschaft
Gil Joseph C.
Lovering Richard D.
Preis Aron
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