Dabco T-9, T-12 and 120 tin-based catalysts
useful in various foam systems.
Hara's team set out to make a catalyst
that could be more easily separated from the fuel.
The demand for reaction initiators (chemical catalysts
such as organic peroxides and amines) will register below-average gains through 2009.
Within the catalyst
this causes a more intensive mass transfer between the edge stream that has already been cleaned by the catalyst
and the core stream which has a richer pollutant content.
The researchers report in the July 31 Nature that as the reaction progressed in a test tube, the tungsten catalyst
remained suspended in the mixture as an oily liquid.
The use of these molecules as reactive catalysts
was first explored in the 1950s.
is also asymmetric, says Wan: It facilitates the making of either a left-handed or a right-handed version of a specific molecule.
DMP (N,N-dimethylpiperazinc) general-purpose catalyst
for flexible and semi-flexible polyether foam.
do not actively participate in chemical reactions; instead they offer a temporary docking site for one or more specific compounds.