The present invention relates to a process for the single-stage preparation of polyoxyalkylene glycols by copolymerization of THF and neopentyl glycol in the presence of a heteropolyacid, wherein the total amount of all impurities of the formula (I)
where R
1
and R
2
are each hydrogen when R
3
is an oxyformyl or isopropionate radical, R
1
is hydrogen and R
2
is hydroxy when R
3
is an isopropyl radical and R
1
is hydrogen when R
2
and R
3
together form an —OCH
2
—C(CH
3
)—CH
2
— radical,
in the neopentyl glycol is less than 1000 ppm.
本发明涉及一种通过在杂多酸存在下,通过THF和
新戊二醇的共聚合制备聚氧烷基
乙二醇的单阶段过程,其中
新戊二醇中所有公式(I)中的杂质总量小于1000 ppm,其中当R3为氧甲酰基或异
丙酸酯基时,R1和R2均为氢,当R3为异丙基基团时,R1为氢,R2为羟基,当R2和R3一起形成- O -C(
CH3)-
CH2-基团时,R1为氢。