Abstract: Disclosed are catalysts situated on a polyoxometallate supported. Also disclosed are methods of preparing these catalysts and processes for the conversion of alkanes to unsaturated organic compounds using these catalysts.

Abstract: Disclosed are catalysts situated on a polyoxometallate support. Also disclosed are methods of preparing these catalysts and processes for the conversion of alkanes to unsaturated organic compounds using these catalysts.

Abstract: The present invention is directed to a method of treating tanned leather stock to improve its color expression characteristics. The method provides for utilizing a two-stage amphoteric polymers, which improve the color expression characteristic of the tanned leather stock while still retaining desired grain break and tensile strength. The tanned leather stock is contacted, preferably by immersion, in a float containing particles of an amphoteric polymer dispersed therein and a desired colorant. The amphoteric polymer particles comprise a first stage copolymer polymerized from at least one monomer containing an anionic functionality, such as, an acid functionality, with at least one first stage comonomer and a second stage copolymer polymerized from at least one monomer containing the cationic functionality, such as, an amine functionality, with at least one second stage comonomer.