Liquid phase process for dimethyl ether synthesis

C - Chemistry – Metallurgy – 07 – C

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C07C 41/01 (2006.01) C07C 29/153 (2006.01) C07C 43/04 (2006.01)

Patent

CA 2053615

A one-step process is disclosed for the coproduction of dimethyl ether and methanol from synthesis gas containing H2, CO and CO2. The synthesis gas is contacted with a mixture of methanol synthesis and methanol dehydration catalysts suspended in an inert liquid in a three phase reactor system. Maximum dimethyl ether productivity and product energy recovery are realized by controlling the fraction of methanol synthesis catalyst in the range of about 75 to about 90 wt% of the total catalyst mixture. A methanol-rich fuel product containing dimethyl ether can be obtained when this range is about 95 to about 99.9 wt%.

Divulgation concernant un procédé à étape unique pour la coproduction d'oxyde de diméthyle et de méthanol à partir de gaz de synthèse renfermant H2, CO et CO2. Le gaz de synthèse est mis en contact avec un mélange de catalyseurs de synthèse du méthanol et de déshydratation du méthanol, en suspension dans un liquide inerte d'un système de réacteur à trois phases. On obtient une productivité maximale d'oxyde de diméthyle et une récupération maximale d'énergie en ajustant la proportion de catalyseur de synthèse de méthanol à environ 75-90 % en poids du mélange catalytique total. On obtient un produit combustible riche en méthanol, contenant de l'oxyde de diméthyle, lorsque cette plage se situe à environ 95-99,9 % en poids.

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