Title:
【発明の名称】トリオキサンの製造方法
Document Type and Number:
Japanese Patent JP2869259
Kind Code:
B2
Abstract:
An energy-saving process for the production of trioxane which comprises forming an aqueous solution of formaldehyde, synthesizing trioxane from formaldehyde in the aqueous solution in the presence of a solid acidic catalyst and extracting trioxane from the aqueous solution, characterised in that prior to any distillation step the aqueous solution containing trioxane is contacted with a water-insoluble organic solvent having a boiling point higher than that of trioxane and being free from any azeotropic composition with trioxane so as to form an organic phase containing trioxane and an aqueous phase containing residual formaldehyde, and thereafter the organic phase is separated into trioxane and the organic solvent by distillation, the organic solvent is recycled to effect further trioxane extraction and the aqueous phase is recycled for reconcentration in formaldehyde content for re-use in the trioxane synthesis.
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Inventors:
KASHIWABARA NAGATAKE
KUROISHI TAKEO
HIRAGOORI GENICHI
AKYAMA MINORU
KASAI JUZO
FUKUI JUICHI
KUROISHI TAKEO
HIRAGOORI GENICHI
AKYAMA MINORU
KASAI JUZO
FUKUI JUICHI
Application Number:
JP20826592A
Publication Date:
March 10, 1999
Filing Date:
August 04, 1992
Export Citation:
Assignee:
HORIPURASUCHITSUKUSU KK
International Classes:
B01J31/10; C07B61/00; C07D323/06; (IPC1-7): C07D323/06; B01J31/10
Domestic Patent References:
| JP3123777A | ||||
| JP4212671B1 | ||||
| JP4533184B1 |
Attorney, Agent or Firm:
Kaoru Furuya (3 outside)