Patent · US Expired

Process and equipment for the continuous manufacture of trioxan

US4340542A · kind A · utility

6Cited by

5References

3Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Helmut Bar · Offenbach am Main, DE
Herbert Mader · Nauheim, DE
Karl-Friedrich Muck · Wiesbaden, DE
Paul Zorner · Wiesbaden, DE

Key dates

Filing date	Oct 29, 1980
Grant date	Jul 20, 1982
Priority date	—
Expiry date	Oct 29, 2000

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J19/2435
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a process for the continuous manufacture of trioxan, if appropriate together with cyclic formals, from aqueous formaldehyde solutions in a circulation reactor with an evaporator, wherein the vapor/liquid mixture, before it enters the reactor, is separated into the vapor phase and the liquid phase, and subsequently the two phases are fed separately to the reactor. In particular, high space-time yields can be achieved by the process according to the invention. Moreover, equipment for carrying out this process is a subject of the invention.

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