Basf Se Corporation

Frank Niedermaier

Achim Stammer

Simon Gramlich

Arnold Schneller

Joachim Clauss

Axel Wilms

Gad Kory

Volker Rauschenberger

Stefan Schwiegk

Christian Schmidt

Angela Ulzhöfer

Angela Ulzhoefer

Michel Gassmann

Bernd Hackel

The present invention relates to a process for preparing a polyaryl ether by reacting components (a1) and (a2) in the presence of a carbonate compound (C) to obtain a salt-containing polymer (SP) comprising the polyaryl ether and a salt (S). After the reaction, the salt (S) is extracted from the salt-containing polymer (SP) to obtain a desalinated polymer (DP) comprising the polyaryl ether.

Desalination of polyaryl ethers by means of melt extraction

The present invention relates to a process for the preparation of an aliphatic or partially aromatic polyamide, in which an aqueous composition of the monomers is subjected to an oligomerization at elevated temperature and increased pressure, the reaction mixture is optionally subjected to a first decompression to reduce the water content, the (optionally decompressed) reaction mixture is heated within a short time to a temperature above the melting temperature of the polyamides and the heated reaction mixture is subjected to a (further) decompression to reduce the water content and to an after-polymerization.

Process for the continuous preparation of an aliphatic or partially aromatic polyamide

A method for desalinating a salt-containing polymer (SP) comprising a polyaryl ether having a softening temperature Tand a salt (S), comprising the steps of

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Ladenburg, Germany

Frank Niedermaier