摘要:
Porous microcomposites comprising a perfluorinated ion-exchange polymer (PFIEP) containing pendant metal cation exchanged sulfonate groups, metal cation exchanged carboxylate groups, or metal cation exchanged sulfonate and carboxylate groups, wherein the metal cation may be ligand coordinated, and optionally pendant sulfonic acid groups, carboxylic acid groups, or sulfonic acid and carboxylic acid groups, the PFIEP being entrapped within and highly dispersed throughout a network of metal oxide, a network of silica or a network of metal oxide and silica can be prepared from PFIEP and one or more precursors selected from the group consisting of a metal oxide precursor, a silica precursor, and a metal oxide and silica precursor using an in situ process. Preferred metal cations are Cr, Sn, Al, Fe, Os, Co, Zn, Hg, Li, Na, Cu, Pd or Ru. Such microcomposites have a first set of pores having a pore size diameter ranging from about 0.5 nm to about 75 nm and may further comprise a second set of pores having a diameter ranging from about 75 nm to about 1000 nm. These microcomposites possess high surface area and exhibit high catalytic activity. The catalyst is used to isomerize 1,4-dichloro-2-butene to 3,4-dichloro-1-butene, a precursor to neoprone.
摘要:
The present invention provides a process for the preparation of pesticidal fluoroolefin compounds having the structural formula I ##STR1## The present invention also provides intermediate compounds which are utilized in the process of this invention.
摘要:
Fluoroaluminate compounds of formula M.sup.+n (AlF.sub.4).sub.n.sup.- wherein n is 1 to 3 and M.sup.+n is N(R.sub.2).sub.4, P(R.sub.2).sub.4, As(R.sub.2).sub.4, HN(R.sub.2).sub.3, H.sub.2 N(R.sub.2).sub.2, H.sub.3 N(R.sub.2), (R.sub.2).sub.3 P.dbd.N.dbd.P(R.sub.2).sub.3, S�N(R.sub.2).sub.2 !.sub.3, ##STR1## (R).sub.2 N--(C(R).sub.2).sub.k --N(R).sub.3, and ZH.sub.m.sup.+m wherein Z is a base capable of accepting m protons, and various cyclic and aryl groups are disclosed as well as processes for their preparation.
摘要:
A method for the preparation of 1,1,1,2-tetrafluoroethane whereby 1,1,2,2-tetrafluoroethane is contacted with the fluorination catalyst at elevated temperature to effect isomerization.
摘要:
A process for isomerizing saturated C.sub.2 to C.sub.6 fluorohydrocarbons having lesser thermodynamic stability to fluorohydrocarbons having greater thermodynamic stability comprising contacting in the gaseous phase at a temperature from about 200.degree. C. to about 475.degree. C. at least one C.sub.2 to C.sub.6 saturated fluorohydrocarbon with a catalyst composition comprising an aluminum fluoride.
摘要:
An isomerization of a haloalkene is conducted in the presence of a mixture of a copper compound and a trithiocarbonic acid derivative or dithiocarbonic acid derivative.
摘要:
The invention relates to a process for isomerizing iodoaromatic compounds over a non-acidic zeolite catalyst in the liquid or gas phase in the presence of a source of iodine.