Upm-kymmene Corporation

Ome Technologies Gmbh

Ineos Paraform Gmbh & Co. Kg

Technische Universitat Kaiserslautern

Jakob Burger

Hans Hasse

Eckhard Stroefer

Juha Tamper

Eckhard Ströfer

Sergej Blagov

Nadia Galeotti

Fabian Jirasek

Niklas Schmitz

Jan-Oliver Drunsel

Ulrich Schmidt

Mario Renner

Prof Dr-Ing Hans Hasse

In a method and an apparatus furfural is separated from a material stream () which is formed in a treatment of a pretreated wood based material (). The material stream () which comprises at least furfural is introduced to a separation column (). A top vapor condensate () is introduced from a top end of the separation column () to a decanter () in which two liquid phases () are separated from each other. An organic phase () which comprises at least furfural is recovered, and an aqueous phase () is supplied as a reflux to the separation column (). Further, the invention relates to a furfural based product and chemical product and a use of the organic phase.

Method and an apparatus for separating furfural

Process for preparing polyoxymethylene dimethyl ethers having &#x2265;3 oxymethylene units (OME), comprising the steps: (i) introduction of formaldehyde, methanol and water into a reactor R and reaction to give a reaction mixture containing formaldehyde, water, methylene glycol, polyoxymethylene glycols, methanol, hemiformals, methylal (OME) and polyoxymethylene dimethyl ethers (OME);(ii) introduction of the reaction mixture into a reactive distillation column Kand separation into a low boiler fraction Fcontaining formaldehyde, water, methylene glycol, polyoxymethylene glycols, methanol, hemiformals, methylal (OME) and polyoxymethylene dimethyl ethers having from 2 to 3 oxymethylene units (OME) and a high boiler fraction Fcontaining polyoxymethylene dimethyl ethers having more than two oxymethylene units (OME).

Process for preparing polyoxymethylene dimethyl ethers from formaldehyde and methanol in aqueous solutions

The invention relates to a continuous process to make and isolate methylal by reacting formaldehyde and methanol with an acid catalyst under at least partial formation of methylal and water, to form a mixture Mcomprising formaldehyde, methanol, methylal, and water, separating the said mixture Min a distillation column B into three distinct product streams, one being a distillate taken from the column head BH which is rich in methylal, one taken from the column bottom stream BB being almost pure water, and one taken from the side of the column B below the reaction zone which stream is rich in methanol, characterised in that the ratio of the amount of substance of methanol to the amount of substance of formaldehyde in the mixture Mis at least 3 mol/mol, and to an apparatus to be used with this process.

Process for the production of pure methylal

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Kaiserslautern, Germany

Jakob Burger