The present invention is directed to processes for preparing supported metal catalysts comprising one or more catalytically active metals applied to a porous catalyst support and to processes that use such catalysts. The process requires the formation of an organic complex during the manufacture of the catalyst which after its formation is either partially or fully decomposed before reduction if the metal to form the catalyst. The catalysts have high levels of metal dispersion and uniform distri...

A process for preparing fluorovinylethers having general formula: R.sub.fO--CF.dbd.CF.sub.2 (IA) wherein R.sub.f is a fluorinated or perfluorinated alkyl or cycloalkyl substituent; comprising the following reaction steps: 1) reaction of a hypofluorite; 2) dehalogenation or dehydrohalogenation of the fluorohalogenethers obtained in step 1) and obtainment of vinyl ethers; 3) fluorination with fluorine of the vinyl ethers and obtainment of fluorohalogenethers; and 4) dehydrohalogenation of the fluo...

A method of modifying a zeolite catalyst to increase para-xylene selectivity of the zeolite catalyst in toluene methylation reactions is provided. The method includes forming a slurry of a ZSM-5-type zeolite and an aqueous solution of a phosphorus compound. Water is removed from the slurry to provide a non-steamed, phosphorus treated ZSM-5 zeolite catalyst without deposition of phosphorus onto the catalyst by organophosphorus vapor deposition. The resulting non-steamed, phosphorus treated ZSM-5 ...

The invention concerns a method for preparing paclitaxel characterized in that it consists in starting with 10-deacetyl-baccatine in accordance with a "one-pot" reaction including the following three steps: a) protecting the hydroxy radical in position 7 of 10-deacetylbaccatine with a silylated radical, then b) acetylating the hydroxy radical in position 10, c) optionally crystallizing the resulting baccatine III derivative, followed by condensation of (4S,5R)-3-N-benzoyl-2RS-methoxy-4-phenyl-1,...

A process for preparing a toner comprising the steps of (1) pulverizing a pulverized product of a composition comprising a resin binder and a colorant with a jet type pulverizer in the presence of fine inorganic oxide particles, to give an upper limit cut-off classification powder; and (2) classifying the upper limit cut-off classification powder with a classifier, the classifier comprising a classifying rotor comprising a driving shaft arranged in one casing as a central shaft thereof in a vert...

The present invention relates to a process for preparing a fluoropolymer containing at least one kind of fluoroolefin, which comprises carrying out polymerization in the presence of a surfactant represented by the formula (1): ##STR00001## (wherein R.sup.1 and R.sup.2 may be the same or different respectively, and represent an alkyl group or an alkenyl group, R.sup.3 is a hydrogen atom, an alkyl group or an alkenyl group, the total carbon number of R.sup.1 to R.sup.3 is 2 to 25, L.sup.- is a gro...

A method comprising contacting a donor support with a recipient support to generate a mixture, and heating the mixture to produce a polymerization catalyst, wherein a metal or a metal-containing compound migrates from the donor support to the recipient support. A method comprising contacting a donor support comprising inactive metal species with a recipient support, and mobilizing the inactive metal species from the donor support to form an active metal species on the recipient support.

Processes for preparing hexafluoroisobutene epoxide (HFIBO) from CH2.dbd.C(CF3)2 (HFIB) are provided. The processes can be carried out in substantial absence of oxidation catalysts.

The present invention provides a process for preparing highly pure Temozolomide base which includes recovery from the purification mother liquors by using an anionic exchange resin. By treating Temozolomide hydrochloride with a mixture of an organic acid, a water miscible organic solvent, and water, Temozolomide free base is obtained in an acidic medium. Due to the high sensitivity of Temozolomide to basic pH values the recovery-including process is especially advantageous because it enables obt...

The invention relates to a process for preparing enantiomerically enriched aryl-aminopropanols and to their use and also to intermediates.