Rohm and Haas Company

Sunoco Inc (r&m)

Sunoco, Inc.

Anthony F Volpe, Jr

James E Lyons

Paul E Ellis, Jr

Swati Karmakar

John Natoli

Alkanes are converted to unsaturated carboxylic acids by contacting an alkane with an oxidizing agent and a heteropolyacid supported on wide pore polyoxometallate salts.

Heteropoly acids supported on polyoxometallate salts and their

Conversion of alkanes to unsaturated carboxylic acids over heteroploy

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.

Method of treating leather with amphoteric polymers

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Lansdale, PA, United States of America

Anthony F Volpe, Jr