Preparation of polytrimethylene ether glycol and copolymers thereof
申请人:Harmer Andrew Mark
公开号:US20070066854A1
公开(公告)日:2007-03-22
The present invention relates to a process comprising using ionic liquids for the polycondensation of 1,3-propanediol reactants to produce polytrimethylene ether glycol and copolymers thereof.
Compositions of matter useful as ionic liquids of the formula Z
+
A
−
, wherein Z
+
is a cation selected from the group consisting of pyridinium, pyridazinium, pyrimidinium, pyrazinium, imidazolium, pyrazolium, thiazolium, oxazolium, triazolium, and phosphonium, ammonium cations with specified substituents, and A
−
is selected from the group consisting of the following three anions wherein R
11
, R
12
and R
13
are as specified.
R
11
—CHF—CF
2
—SO
3
−
Formula I
R
12
—CF
2
—CF
2
—SO
3
−
Formula II
(R
13
—CHF—CF
2
—SO
2
)
2
N
−
Formula III
This invention relates to a process for isomerizing olefins using a porous microcomposite comprising at least one fluorinated sulfonic acid on silica as the catalyst.