High purity cyanuric acid prodn

Prodn. of cyanuric acid is by cooling an isocyanurate/ammonia gas mixt. from 300-480 deg.C down to 200-300 deg.C so that the isocyanuric acid trimerises to give a solid cyanuric acid deposit which is separated off while the non-converted gas mixt. is recycled or otherwise worked-up. Also claimed is...

Full description

Saved in:
Bibliographic Details
Main Authors SCHULZ, ERICH, ANSFELDEN, AT, HAEUBL, GEORG., LINZ, AT, MUELLNER, MARTIN., LINZ, AT
Format Patent
LanguageEnglish
German
Published 14.03.1996
Edition6
Subjects
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
Online AccessGet full text

Cover

More Information
Summary:Prodn. of cyanuric acid is by cooling an isocyanurate/ammonia gas mixt. from 300-480 deg.C down to 200-300 deg.C so that the isocyanuric acid trimerises to give a solid cyanuric acid deposit which is separated off while the non-converted gas mixt. is recycled or otherwise worked-up. Also claimed is the integration of such a process into a urea decomposition. process for melamine mfr., the urea being converted in a vortex at 300-480 deg.C to give the starting isocyanuric acid/ammonia gas mixt., with the gas mixt. remaining unconverted after cooling and trimerisation/deposition being either (i) recycled, (ii) heated to 300-480 deg.C and worked up to give melamine or (iii) used as a starting material for other processes.
Bibliography:Application Number: DE19944431811