Methanol to olefins MTO

Fig. 9. Methanol-to-olefins (MTO) and Mobil olefins-to-gasohne (MOGD) and distillate process schematic.

A variation of this process is Mobil s methanol-to-olefins (MTO) process, in which up to 80% C2—olefins are produced over ZSM-5 of reduced acidity and at much higher temperatures. 

Barger, P. Methanol to Olefins (MTO) and Beyond. Catalytic Science Series, 2002, 3(Zeo-lites for Cleaner Technologies), 239-260. 

Most of the commercial zeolite catalyzed processes occur either through acid catalysis fluid catalytic cracking (FCC), aromatic alkylation, methanol to olefins (MTO),... 

S. B., and Seo, G. (2008) Effects of cage shape and size of 8-membered ring molecular sieves on their deactivation in methanol-to-olefin (MTO) reactions. Appl. Catal. A, 339, 36-44. 

It is likely that future commercialization of Methanol-to-Olefins (MTO) will take place in a fluid-bed reactor for many of the same reasons which encouraged fluid-bed MTG development, including better temperature control and constant product composition. The olefins produced by this process can be readily converted to gasoline, distillate and/or aviation fuels by commercially available technologies such as Mobil s MOGD process. 

Applications To primarily produce propylene from C4 to C8 olefins supplied by steam crackers, refineries and/or methanol-to-olefins (MTO) plants via olefin cracking. 

UOP/HYDRO Olefins Methanol Methanol to olefins (MTO) process uses fluidized-bed reactor and efficient product recovery system NA NA... 

The methanol, which need not be the highest grade chemical methanol, is produced and stored prior to feeding to the methanol to olefins (MTO) plant. The conversion of methanol into olefins is highly exothermic and in order to help control heat evolution some processes use a primary reactor to convert some of the methanol into dimethyl ether (DME) by the reaction ... 

The methanol to olefins (MTO) route can be optimized to produce either ethylene and propylene or solely propylene for which there is strong and increasing demand. The basic stoichiometry for ethylene is ... 

In the subsequent sections, a literature survey of the use of TEOM is presented, followed by detailed examples illustrating the use and characteristics of the TEOM for conversion of methanol to olefins (MTO) catalyzed by SAPO-34 and steam reforming of natural gas on nickel catalysts. 

Because the market for olefins currently greatly exceeds that for methanol production, olefin production could become an important new outlet for the potentially vast quantities of low-cost methanol. Methanol conversion produces a mixture of ethylene and propylene of various ratios or primarily propylene depending on the process. Currently, there are two processes for the production of propylene from methanol the first process is methanol to olefin (MTO) process, developed by UOP and Hydro,... 

Gasoline and distillate fuels can be produced from methanol by combining two Mobil processes Methanol to olefins (MTO) and Mobil olefins to gasoline and distillate (MOGD). Both processes use the medium pore zeolite ZSM-5 catalyst. The combined process offers gasoline and distillate in various proportions, as well as light olefinic byproducts if needed. Liquid fuel yields of up to 95 weight percent of hydrocarbons can be obtained. 

Principal Characteristics. - Molecular sieves with pore openings of about 0.45 nm show very interesting shape-selectivity properties for the conversion of methanol to olefins (MTO process). The small-pore molecular sieves studied in the MTO process are chabazite, erionite, zeolite T, ZK-5, ZSM-34, zeolite A, SAPO-17, SAPO-34, and SAPO-44. All of them can sorb only straight chain molecules, e.g. primary alcohols and linear paraffins and olefins, but no branched isomers and aromatics the pore opening is smaller than the kinetic diameter of branched and aromatic molecules, but large enough to permit the access of linear molecules. 

Application The UOP/HYDRO Methanol-to-Olefins (MTO) Process produces ethylene and propylene from methanol derived from raw materials such as natural gas, coal, petroleum coke or biomass. 

---