CATALYST AND METHOD TO MANUFACTURE OLEFINES FROM DIMETHYL ETHER IN THE PRESENCE THEREOF Russian patent published in 2008 - IPC B01J29/40 B01J23/06 B01J23/10 B01J21/04 B01J21/06 C07C1/20 

FIELD: CHEMISTRY.

SUBSTANCE: catalyst for synthesis of low molecular weight olefines from dimethyl ether is described. The catalyst is based on zeolites of pentasyl type with SiO₂|Al₂O₃=25-30, containing not more than 0.11% (wt.) of sodium oxide, containing zinc oxide, or zirconium oxide, or lanthanium oxide or binary mixtures thereof, and a bonding agent - aluminium oxide, component ratio being as follows, % wt.: zinc oxide 1.0-2.0 or zirconium oxide 0.5-0.8 or lanthanium oxide 0.5-0.8 or binary mixtures thereof 1.0-1.5 aluminium oxide 33.0-34.0 pentasyl type zeolite with SiO₂|Al₂O₃=25-30 and concentration of 0.11% (wt.) max sodium oxide balance. Method to manufacture low molecular weight olefines from dimethyl ether mixed with inert gas at elevated temperature and pressure in the presence of above described catalyst, dimethyl ether content in the raw material being up to 20% (vol.), is also described.

EFFECT: increase in catalyst activity and stability.

4 cl, 4 tbl, 24 ex