Abstract Oxymethylene ethers (OME) are an attractive alternative to fossil diesel fuel due strongly reduced harmful emissions. An anhydrous, liquid phase production process based on dimethyl ether (DME) has been elaborated, which offers high selectivity and economic advantages. A catalyst screening for the reaction of DME with trioxane carried out. Highly active catalysts could be identified fu...

Five flavones were isolated from Chrysanthemum coronarium L., four of which were isolated for the first time from the genus Chrysanthemum. Two were the flavonoid aglycones 5,7-dihydroxy-3,6,4'-trimethoxyflavone (1) and scutellarin-6,7-dimethyl ether (2). A new flavonoid glycoside, apigenin-7-O-[2"(6'''-O-beta-D-acetylglucopyranosyl)]-6"-O-acetylglucopyranoside (3), along with two known ones, i....

Dimethyl ether is one of the derivative products coal that will be used as a household fuel substitute for LPG in Indonesia. In addition, it can also working fluid refrigeration system. To understand behavior this refrigerant, simulation was carried out to determine flow pattern dimethyl horizontal evaporator. This study applied an evaporator air conditioner with inside diameter 6.3 and 7.9 mm ...