Title:
METHOD AND DEVICE FOR PRODUCING TRIOXANE
Document Type and Number:
WIPO Patent Application WO/2014/017203
Kind Code:
A1
Abstract:
The objective of the present invention is to increase the yield and selectivity of trioxane and to minimize the amount of unreacted formaldehyde when producing trioxane from an aqueous formaldehyde solution. In this production method, formaldehyde gas is generated by pyrolyzing a hemiformal concentrate obtained from an aqueous formaldehyde solution and alcohol, and using a solid acid catalyst, reaction generated gas containing trioxane is obtained from the formaldehyde gas. Then, by contacting the reaction generated gas with an organic solvent, the trioxane and the unreacted formaldehyde gas that are contained in the reaction generated gas are separated into gas and liquid, and the separated unreacted formaldehyde gas is circulated and recycled by being added to the system for obtaining the reaction generated gas.
Inventors:
NAKAO HIROAKI (JP)
KUBOTA YUTAKA (JP)
KUBOTA YUTAKA (JP)
Application Number:
PCT/JP2013/066201
Publication Date:
January 30, 2014
Filing Date:
June 12, 2013
Export Citation:
Assignee:
POLYPLASTICS CO (JP)
International Classes:
C07D323/06; C07B61/00
Foreign References:
| JP2001011069A | 2001-01-16 | |||
| JPS5062921A | 1975-05-29 | |||
| JPH07300441A | 1995-11-14 |
Attorney, Agent or Firm:
SHOBAYASHI, Masayuki et al. (JP)
Right wood Masayuki (JP)
Right wood Masayuki (JP)
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