Process for the separation of an aqueous mixture of trioxane...

Details Process for the separation of an aqueous mixture of trioxane... Process for the separation of an aqueous mixture of trioxane...

2006-02-28

2006-02-28

Tsang, Cecilia J. (Department: 1625)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C546S290000

Reexamination Certificate

active

07005529

ABSTRACT:
Process for the separation of an aqueous mixture of trioxane and formaldehyde and corresponding applications. The aqueous trioxane and formaldehyde mixture has first trioxane:formaldehyde ratio. The process includes the steps of reacting the aqueous mixture of trioxane and formaldehyde with urea, and separation an exiting vapor phase having a second trioxane:formaldehyde ratio that it higher than the first trioxane:formaldehyde ratio. An aqueous mixture of trioxane and formaldehyde coming from a reactor in which trioxane is being synthesized or from a distillation column in which a prior aqueous mixture of trioxane and formaldehyde can be separated from the excess formaldehyde. Raw material for the production of urea-formaldehyde glues or resins can be formed.

REFERENCES:
patent: 3281336 (1966-10-01), Talbert
patent: 3494106 (1970-02-01), Herz et al.
patent: 6201136 (2001-03-01), Reichl et al.
patent: 6433194 (2002-08-01), Schweers et al.
patent: 0680959 (1995-11-01), None

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