Basf Aktiengesellschaft

Bernhard Maltry

Bernd Eck

Dieter Baumann

Johann-Peter Melder

Herbert Helfert

Rudolf Erich Lorenz

Martin Schmidt-Radde

Melanie Brunner

J&ouml;rg Heilek

Hans-J&uuml;rgen Weyer

Method for producing a granulate from a melt

A method for preparing neopentyl glycol hydroxypivalate granules by application of a neopentyl glycol hydroxypivalate melt (,) onto a cooling belt (,) on which the melt solidifies, wherein the melt contains at least so 3 wt % of neopentyl glycol hydroxypivalate crystals, based on the total amount of neopenlyl glycol hydroxypivalate.

Preparation of neopentyl glycol hydroxyprivalate granules

In a process for the production of neopentyl glycol hydroxypivalate granules by depositing a neopentyl glycol hydroxypivalate melt on a chill surface, on which the melt solidifies, as a flat film, which, after solidification, is comminuted to give granules. The melt contains less than 3% by weight, based on the total amount of neopentyl glycol hydroxypivalate, of neopentyl glycol hydroxypivalate crystals.

Production of clumping-free neopentyl glycol hydroxpivalate granules

In a process for separating substances from a liquid mixture by crystallization in a crystallizer, a two-phase seed layer in the form of a melt or solution of the mixture to be separated, with crystals suspended therein, is applied, prior to the crystallization, to those surfaces of the crystallizer from which crystals grow during the crystallization.

Separation of substances from a liquid mixture by crystallization

In a process for purifying N-vinylpyrrolidone by crystallization in a crystallizer, those surfaces of the crystallizer from which crystals grow during the crystallization are covered with an N-vinylpyrrolidone seed layer before the crystallization.

Purification of N-vinylpyrrolidone by crystallization

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Obrigheim, Germany

Bernhard Maltry