METHOD OF OBTAINING ETHER PRODUCT Russian patent published in 2008 - IPC C07C43/04 C07C41/06 

FIELD: obtaining of ether product.

SUBSTANCE: method involves reaction of iso-olefins of iso-olefin hydrocarbon raw materials with ethanol, using at least, one reaction-rectification system, with a middle reaction zone and upper and lower rectification zones. The initial ethanol is put between the upper rectification zone and the reaction zone. The ether product is tapped off from the lower part of the lower rectification zone. The used hydrocarbon fraction is taken from the upper part of the upper rectification zone in the form of azotrope with ethanol. The used hydrocarbon fraction is washed from ethanol, and the ethanol is separated from the washing water by rectification in form of azeotrope with water and the separated ethanol is returned to the reaction-rectification system. The azeotrope ethanol with water is put into the upper rectification zone, 5-15 plates higher than the point of input of initial ethanol. From the used hydrocarbon fraction, taken from the upper part of the upper rectification zone, water is taken out, containing ethanol, which is taken to the washing stage or to the stage of separating ethanol from washing water. The technical outcome is achieved due to lowering of the quantity of water on the catalyst of the process with ethanol, separated from the washing water.

EFFECT: increased efficiency of the process.

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