US 2008/0179564 A1 · METHOD OF PREVENTING OR REDUCING ALUMINOSILICATE SCALE IN INDUSTRIAL PROCESSES

Abstract

Materials and a method are provided whereby polymers with least 0.5 mole % of the pendant group or end group containing —Si(OR″)3 (where R″ is H, an alkyl group, Na, K, or NH4) are used to control aluminosilicate scaling in an industrial process having an alkaline process stream such as a pulping mill process stream. When materials of the present invention are added to the alkaline process stream, they reduce and even completely prevent formation of aluminosilicate scale on equipment surfaces such as evaporator walls and heating surfaces. The present materials are effective at treatment concentrations that make them economically practical.

Claims16

Dependent claims

A composition for use in reducing aluminosilicate scale in an alkaline industrial process comprising a polymer according to the formula:

where w=1-99.9%, x=0.1-50%, y=0-50%, z=0-50%;
and Q=C1-C10 alkyl, aryl, amide, acrylate, ether, COXR where X=O or NH and R=H, Na, K, NH4, C1-C10 alkyl or aryl, or any other substituent;
X=NH, NP where P=C1-C3 alkyl or aryl, or O;
R′=C1-10 alkyl, or aryl;
V″=H, C1-C3 alkyl, aryl, Na, K or NH4 or forms an anhydride ring;
R″=H, C1-C3 alkyl, aryl, Na, K or NH4;
and D=NR12 or OR1 wherein R1=H, C1-C20 alkyl, C1-C20 alkenyl or aryl, with the proviso that all R, R″, V″ and R1 groups do not have to be the same.

4 more elements

Dependencies are inferred from the claim text.

Method of preventing or reducing aluminosilicate scale in industrial processes

Life of this patent

Method of preventing or reducing aluminosilicate scale in industrial processes

Life of this patent

Abstract

Claims16