Method for non-oxidative production of formaldehyde from methanol
AssigneeTicona LLC
InventorsThomas Kaiser, Elke Schweers, Christine Meister
Life of this patent
Estimating the term…
Abstract
Process for the nonoxidative preparation of formaldehyde from methanol The invention relates to a process for preparing formaldehyde from methanol by dehydrogenation in a reactor at temperatures in the range from 300 to 1000° C. in the presence of a catalyst which is introduced into the reactor with the aid of a carrier gas to give a product gas mixture, wherein the formaldehyde is separated from the product gas mixture and at least part of the remaining product gas mixture is recirculated to the reactor in a circulating gas stream and the carrier gas used is a carbon-free gas or gas mixture.
Claims14
A process for preparing formaldehyde from methanol by dehydrogenation in a reactor at temperatures in the range from 300 to 1000° C. in the presence of a catalyst which is introduced into the reactor with the aid of a carrier gas to give a product gas mixture, wherein the formaldehyde is separated from the product gas mixture and at least part of the remaining product gas mixture is recirculated to the reactor in a circulating gas stream and the carrier gas used is a carbon-free gas or gas mixture.
A process for preparing trioxane, which comprises
- preparing formaldehyde from methanol by dehydrogenation in a reactor at temperatures in the range from 300 to 1000° C. in the presence of a catalyst which is introduced into the reactor with the aid of a carrier gas to give a product gas mixture from which the formaldehyde is separated off and at least part of the remaining product gas mixture is recirculated to the reactor in a circulating gas stream, wherein the carrier gas used is a carbon-free gas or gas mixture, and
- trimerizing the formaldehyde obtained in this way to give trioxane.
A process for preparing polyoxymethylene, which comprises
- preparing formaldehyde from methanol by dehydrogenation in a reactor at temperatures in the range from 300 to 1000° C. in the presence of a catalyst which is introduced into the reactor with the aid of a carrier gas to give a product gas mixture from which the formaldehyde is separated off and at least part of the remaining product gas mixture is recirculated to the reactor in a circulating gas stream, wherein the carrier gas used is a carbon-free gas or gas mixture, and
- optionally, purifying the formaldehyde, and
- polymerizing the formaldehyde.
Dependencies are inferred from the claim text.