CATALYTIC METHOD OF PRODUCING DIMETHYL EHTER FROM METHANOL Russian patent published in 2012 - IPC C07C41/09 C07C43/04 

FIELD: chemistry.

SUBSTANCE: present invention relates to a catalytic method of producing dimethyl ether from methanol, which is realised in a reactor, wherein the catalyst is in fluidised state, involving: (1) feeding starting methanol through two or more inlet holes which can be on the bottom, in the lower, middle or top parts of the reactor; reaction with a catalyst to obtain dimethyl ether via dehydration of methanol; carrying out a reaction to obtain dimethyl ether via dehydration of methanol to obtain a stream of reaction products; separation of the stream of reaction products to obtain a carbided catalyst and a crude output product mainly containing the end product, dimethyl ether; and (2) feeding a portion of the carbided catalyst obtained at step (1), in a continuous or cyclic mode, into a regenerator to regenerate the catalyst by carbon burning, and the remaining portion is cooled and fed from below into the reactor, after catalyst regeneration, divided into two parts, one of which, after heat exchange, is fed directly into an apparatus for mixing the catalyst lying in the bottom of the lift-reactor, and the second part is mixed with fresh catalyst and fed into the reactor, wherein the reactor used is a combination of a lift-reactor and a fluidised-bed reactor, and the fluidised-bed reactor lies on top of the lift-reactor.

EFFECT: method enables to obtain an end product with high selectivity and high conversion of methanol.

18 cl, 11 ex, 7 tbl, 2 dwg