Rohm and Haas Company

James Henry Barrett

David H Clemens

Thomas J Howell

George M Lein, Jr

Eric Gustave Lundquist

Newman M Bortnick

Robert H Gore

Carlos Alfonso Cruz

Warren Harvey Machleder

Richard J Piccolini

Samuel F Reed

Biwang Jiang

Jose Antonio Trejo

James Nelson Alexander, Iv

A method for removing arsenic from water by contacting water with a strong base anion exchange resin comprising at least one metal ion or metal-containing ion whose arsenate salt has a Kno greater than 10, provided that the metal is not zirconium.

Method for removal of arsenic from water

Solid media useful for a variety of applications, such as separations, catalysis, drug carriers, sensors, and combinatorial chemistry, are disclosed. The solid media are prepared with PNPs having a diameter of 1 to 50 nanometers, the PNPs including as polymerized units a multi-ethylenically-unsaturated monomer. Also provided are methods for preparing the solid media.

Solid media

An improved process for the manufacture of crosslinked copolymer particles from seed particles by imbibing a monomer therein and polymerizing the same under controlled suspension conditions wherein said improvement comprises expanding the seed in staged or sequential steps of feeding lower levels of crosslinking monomers in the early stages and preferably higher levels of crosslinking monomers at later stages of polymerization.

Process for producing an expanded seed copolymer and product therefrom

A process for the manufacture of crosslinked ion exchange copolymer particles wherein small seed particles are swollen to final size by concurrently feeding monomer and polymerizing the same under controlled suspension conditions and the unique ion exchange particles produced thereby.

Copolymer process and product therefrom consisting of crosslinked seed

Hybrid copolymers are prepared by at least partially filling the macropores of a macroreticular copolymer with a guest crosslinked copolymer of either the same monomers or a copolymer of different type monomers. The hybrid copolymers can be readily converted into ion exchange resins. Such resins have markedly improved physical and chemical properties, including improved ion exchange properties.

Hybrid copolymers

Chloromethylated hybrid copolymers are base-functionalized with polyethyleneimines prior to conventional acid functionalization, to produce hybrid resins with markedly improved ion exchange properties.

Hybrid ion exchange resins with improved properties

A process for desalinating water containing mineral salts utilizes thermally regenerable hybrid resins. A preferred embodiment provides for the desalination of saline water using hybrid resins comprising per hundred parts of macroreticular host polymer, a guest phase ranging from 50 to 300 parts by weight.

Desalination process using thermally regenerable resins

Hybrid copolymers are prepared by at least partially filling the macropores of a macroreticular ion exchange resin with a gel type, crosslinked copolymer of either the same monomers or a copolymer of different type monomers. The hybrid copolymers can be readily converted into ion exchange resins. Such resins have markedly improved physical and chemical properties, including improved ion exchange properties.

Ion exchange resins derived from hybrid copolymers

Hybrid copolymers are prepared by at least partially filling the voids of a macroreticular copolymer with a gel-type, cross-linked copolymer of either the same monomers or a copolymer of different type monomers. The hybrid copolymers can be readily converted into ion exchange resins. Such resins have markedly improved physical and chemical properties, including improved ion exchange properties. Such resins are also especially useful for decolorizing sugar solutions.

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Feasterville, PA, United States of America

James Henry Barrett