Preparation and Application of Hydroxyacetic Acid Esters as Methanol-Gasoline Additives
作者:Xiaoyan Jiang、Ying Tang
DOI:10.14233/ajchem.2013.14775
日期:——
In this paper, hydroxyacetic acid esters (glycolic esters) were synthesized and used as phase stabilizer and saturation vapour pressure depressor of methanol-gasoline. The results show that the stabilities of the blends depend on the length of the glycolic esters’ alkoxy group. Among these glycolic esters, hexyl glycolic ester and octyl glycolic ester were found to be the most effective in various gasoline-methanol blends. Besides, the glycolic esters display high capacity to depress the saturation vapour pressure of methanol-gasoline and decyl glycolic ester is the most effective one. According to the results, it can be concluded that the glycolic esters have the great potential to be used as bifunctional gasoline-methanol additives.
The formula (I):
wherein each of R
2
and R
3
is, same or different, C2-C4 alkyl or the like; or R
2
and R
3
are taken together with the adjacent carbon atom to form a 5 to 8 membered non-aromatic carbocyclic ring; R
4
is C1-C6 alkyl or the like; X is an oxgen atom or a sulfur atom; A is the group of the formula:
wherein R
1
is, same or different, alkyl or the like; W is C2-C6 alkylene which may contain an optionally substituted heteroatom(s) or the like; n is an integer of 0 to 7, a pharmaceutically acceptable salt, or a solvate thereof.
The formula (I):
wherein each of R2 and R3 is, same or different, C2-C4 alkyl or the like; or R2 and R3 are taken together with the adjacent carbon atom to form a 5 to 8 membered non-aromatic carbocyclic ring; R4 is C1-C6 alkyl or the like; X is an oxgen atom or a sulfur atom; A is the group of the formula:
wherein R1 is, same or different, alkyl or the like; W is C2-C6 alkylene which may contain an optionally substituted heteroatom(s) or the like; n is an integer of 0 to 7, a pharmaceutically acceptable salt, or a solvate thereof.