Cytec Industries Inc.

Milliken + Co

Lei Zhang

Haunn-Lin Tony Chen

John Carr

Airong Song

Roderick Glyn Ryles

Matthew Taylor

John L Sanchez

Dannon Stigers

Rajesh Raitani

Ryan Kopreski

Xueping Qiu

Xinyu Wei

Luis Moya

Michael Moser

Adam James Fischmann

Matthew Dean Soderstrom

A hydrometallurgical solvent extraction method includes mixing an aqueous metal ion solution with an organic solution of metal extraction reagent to form a mixture, and allowing the aqueous metal ion solution and organic solution to phase separate from the mixture; wherein prior to mixing the aqueous metal ion solution and the organic solution, a water-soluble or water-dispersible polymer comprising pendant sulfonic acid or sulfonate salt groups selected from the group consisting of sulfonated polystyrene; an addition polymer including at least one of styrene-4-sulfonic acid and 2-acrylamido-2-methylpropane sulfonic acid; naphthalene sulfonic acid-formaldehyde condensate; lignosulfonate; salts thereof; and mixtures thereof, is added to the aqueous metal ion solution, the organic solution, or to both the aqueous metal ion solution and the organic solution. The water-soluble or water-dispersible polymer can also be added simultaneously with or after mixing of the aqueous metal ion solution and the organic solution.

Hydrometallurgical solvent extraction methods

Silicon containing polyamine scale inhibitors derived from poly(primary amine)s are disclosed. The scale inhibitors can be used to reduce siliceous scale formation in industrial process streams such as alumina recovery process streams, nuclear waste streams and kraft paper mill effluent streams.

Scale inhibitor compositions and methods of using

Processes for inhibiting scale produced during wet process phosphoric acid production by adding a scale inhibiting amount of a reagent having at least one amine portion including at least one primary amine, and at least one hydrocarbyl portion having an insolubilizing group attached thereto to at least one stage of a wet process phosphoric acid production process are provided herein.

Modified amines useful as scale inhibitors in wet process phosphoric acid production

Processes for removing/recovering heavy metal ions in solutions containing phosphoric acid by adding reagents having at least one organothiophosphorus compound and at least one surfactant to the solution during the wet-process phosphoric acid production process to form heavy metal complexes, and separating the heavy metal complexes from the solution are provided herein.

Compositions and processes for removing heavy metals from phosphoric acid solutions

Disclosed herein are silicon containing polymers and compositions containing the same able to flocculate suspended solids in the Bayer or Sinter process stream.

Silicon containing polymer flocculants

Processes for enhancing filtration rate and/or clarification of phosphoric acid produced by the wet process and containing suspended insoluble particulates by adding to one or more stage of the wet process phosphoric acid production stream an effective amount of a reagent including polymeric microparticles characterized as being anionic or amphoteric and having a weight average molecular weight of greater than 60 Million daltons are provided herein.

Polymeric microparticles as filtration and/or clarifying aids in phosphoric acid production

Processes for inhibiting scale produced during wet process phosphoric acid production by adding a scale-inhibiting amount of a reagent having a primary amine-containing polymer to at least one stage of a wet process phosphoric acid production process are provided herein, wherein said primary amine-containing polymer includes one or more organic moieties that reduce the polymer's solubility in an aqueous environment as compared to its native form, thereby reducing or preventing scale in the wet process phosphoric acid production process.

Primary amine-containing polymers useful as scale inhibitors

An enhanced char integrity fabric containing a plurality of warp yarns in the warp direction and a plurality of weft yarns in the weft direction. The warp yarns and the weft yarns contain thermoplastic fibers having a melting temperature less than about 300&#xb0; C. The enhanced char integrity fabric also contains a plurality of char reinforcing yarns in at least the warp direction. The char reinforcing yarns have a different composition than the warp yarns and the weft yarns and contain non-melting fibers having a decomposition temperature greater than 300&#xb0; C. The char reinforcing yarns are in an amount of less than about 30% wt of the warp yarns and the tensile strength of the char reinforcing yarns is about equal or less than the tensile strength of the warp yarns.

Enhanced char integrity fabric

Processes for inhibiting scale produced during wet process phosphoric acid production by adding a scale-inhibiting amount of a reagent having a primary amine-containing polymer, or salt thereof, to one or more stages of a wet process phosphoric acid production stream are provided herein, wherein the primary amine-containing polymer includes an A mer according to Formula (I): 

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Stamford, CT, United States of America

Lei Zhang