Etherification of Glycerol with Propylene or 1-Butene for Fuel Additives

Figure 2

Mass spectra of butyl glycerol ethers: (a) 1-MBGE, (b) 2-MBGE, (c) 1,3-DBGE, and (d) 1,2-DBGE.

(a)

(b)

(c)

(d)