Ticona Gmbh

Michael Rosenberg

Elke Schweers

Thomas Kaiser

Michael Haubs

Werner Sievers

Albert Reichl

Rolf Schulz

Christine Meister

Dirk Scheid

Michael Kleiber

Dieter Sommerfeld

Wolfgang Nickelfeld

An apparatus for preparing formaldehyde from methanol by dehydrogenation in a reactor in the presence of a catalyst at a temperature in the range from 300 to 1000&deg; C., a carrier gas stream which has a temperature above the dehydrogenation temperature is fed to the reactor.

Apparatus for the preparation of formaldehyde from methanol

A process for the post-purification in particular of pyrolysis gases for preparing pure formaldehyde, hemiformal being pyrolyzed in an evaporator, the resulting formaldehyde vapor being passed through a condensed liquid component collected in the bottom area of the evaporator, the condensed liquid component being passed out as a falling film situated on the inner wall through a cooled outlet tube disposed in the bottom area of the evaporator and the formaldehyde vapor being passed through the cooled outlet tube in cocurrent and the liquid component and the formaldehyde being taken off separately at the outlet tube end remote from the evaporator.

Process and device for preparing pure formaldehyde

Processes for making trioxane, polyoxymethylene and polyoxymethylene copolymers from formaldehyde, made by the dehydrogenation of methanol in the presence of a catalytic active species set free from a sodium compound, at a temperature in the range of 300&deg; C. to 1000&deg; C., wherein a carrier gas stream which has a temperature above the dehydrogenation temperature is fed to the reactor.

Process for the preparation of trioxane and polyoxymethylene copolymers

In a process for preparing formaldehyde from methanol by dehydrogenation in a reactor in the presence of a catalyst at a temperature in the range from 300 to 1000&deg; C., a circulating gas stream comprising by-products of the dehydrogenation is passed through the reactor.

Method for producing formaldehyde from methanol

In a process for preparing formaldehyde from methanol by dehydrogenation in a reactor in the presence of a catalyst at a temperature in the range from 300 to 1000&deg; C., a carrier gas stream which has a temperature above the dehydrogenation temperature is fed to the reactor.

Process for the non-oxidative preparation of formaldehyde from methanol

In a process for separating liquid mixtures comprising formaldehyde, trioxane, alcohol, hemiformal formed from the formaldehyde and the alcohol, usual minor components and up to 5% by weight of water, the liquid mixture is distilled batchwise or continuously at reduced pressure, atmospheric pressure or superatmospheric pressure in suitable apparatuses which are to be connected to one another in an appropriate manner, and the trioxane is produced in very high purity. The other materials of value, formaldehyde and alcohol, present in the mixture can likewise optionally be separated off and recycled or used otherwise, while the minor components are ejected.

Growing community of inventors

Niedernhausen, Germany

Michael Rosenberg