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Patent Searching and Data


Title:
PREPARATION OF PURE TRIOXANE
Document Type and Number:
Japanese Patent JPH06135957
Kind Code:
A
Abstract:

PURPOSE: To obtain polymerizable pure trioxane by preventing formation of flock by adding alkaline organic compounds to trioxane mixtures at the time of crystallizing.

CONSTITUTION: At the time of preparing pure trioxane by a continuous or non-continuous crystallization, the crystallization is carried out adding an alkaline organic compounds (e.g. triethanolamine) during the crystallization. The amount of the above amine to be added is 5 to 500 ppm, preferably 5 to 25 ppm, in respect to the pure trioxane. By means of adding an alkaline organic compound, formation of flock substance is prevented even after operating as long as 120 hours or more enabling the operation without causing blockage of crystallizing equipment.


Inventors:
KAARUUFURIIDORIHI MIYUTSUKU
HERUMUUTO SHIYURAAFU
JIIKUBERUTO RITSUTONAA
Application Number:
JP13490693A
Publication Date:
May 17, 1994
Filing Date:
June 04, 1993
Export Citation:
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Assignee:
HOECHST AG
International Classes:
B01D9/02; C07D323/06; (IPC1-7): C07D323/06; B01D9/02
Attorney, Agent or Firm:
Mitsufumi Ezaki (3 others)