Patent · US Active

Trioxane production method wherein a side aqueous flow is deducted at a first distillation stage

US8530678B2 · kind B2 · utility

0Cited by

7References

20Claims

0Family size

Assignee

BASF SE

Inventors

Markus Siegert · Heidelberg, DE
Neven Lang · Mannheim, DE
Eckhard Stroefer · Mannheim, DE
Achim Stammer · Freinsheim, DE
Thorsten Friese · Mannheim, DE

Key dates

Filing date	Oct 20, 2005
Grant date	Sep 10, 2013
Priority date	—
Expiry date	Feb 7, 2029

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D323/06
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Processes are disclosed comprising: (a) reacting an aqueous formaldehyde solution in a reactor in the presence of a suitable catalyst to obtain a reaction product mixture comprising trioxane, formaldehyde and water; (b) distilling the reaction product mixture to form a top stream comprising crude trioxane; and (c) treating the top stream in one or more additional stages to form pure trioxane; wherein an aqueous sidestream is drawn off during the distilling of the reaction mixture.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.