Dow Global Technolgoies LLC

Rohm and Haas Company

University of California

Maria Simon

Puspendu Deo

Craig Jon Hawker

Antony Keith Van Dyk

Paul G Clark

Alaina McGrath

David Lunn

Sungbaek Seo

Somil Chandrakant Mehta

Kaylie L Young

Graham P Abramo

Pramod Akhade

A method of inhibiting silica and silicate scale formation via treating an aqueous system containing silica with an effective amount of a chelating agent blended with a polymeric dispersant in a weight ratio range from greater than 1.0:0.5 to less than 1.0:3.0, agent to dispersant, including blends in a weight ratio of 1:1. Specifically, the chelating agent is either EDTA or DTPA, while the polymer dispersant is an acid and alkylene oxide derived dispersant.

Inhibition of silica scale using a chelating agent blended with acid and alkylene oxide derived polymer dispersants

A method for inhibiting scale comprises adding to a fluid that causes scale formation a polycarboxylic acid or a salt thereof which has a star structure and at least 5 arms. A star polymer comprising a core based on 2,2'-[Oxybis(methylene)]bis[2-(hydroxymethyl)-1,3-propanediol] and 6 arms comprising linear polycarboxylic acids of degree of polymerization (DP) of the arm of at least 2 and in some embodiments up to 15 or more is useful in inhibiting scale formation.

Scale inhibition using star polymers

Disclosed herein is a method for inhibiting scale comprising adding to a fluid that causes scale formation a polycarboxylic acid having a polymer backbone and a plurality of branches from the polymer backbone.

Scale inhibition using branched polymers

Growing community of inventors

Lake Jackson, TX, United States of America

Maria Simon