Slow release tablet composition for treating industrial water systems

摘要

The present invention provides for a slow release composition, preferably as a tablet, for industrial water systems, under an alkaline pH or high water hardness, using as an active ingredient a multifunctional amine of Formula (I) and a hydrophilic polymer, and other components such as a compression agent, in one composition as a biocide, biostat, biodispersant, deposit penetrant aid, organic deposit remover, detergent, surfactant, antifoam, scale inhibitor, scale remover, and a corrosion inhibitor. The composition is used in multiple water cycles, can remove, disperse or inhibit fouling. The active ingredient(s) of the composition is released over a long time, up to 6 months.

主权项

1. A slow release solid tablet composition for industrial water systems which comprises:
a) from about 2 through about 40% by weight of an amphiphilic, liquid compound of Formula (I)
R—X—R1—NH2 wherein:R is a straight chain or branched chain C6-C18 alkyl or a straight chain or branched chain C6-C18 alkyloxy-C2-C3-alkyl;R1 is a straight chain or branched chain C2-C4 alkyl; andX is S, O or N—R2 wherein R2 is H or a straight chain or branched chain C1-C8 alkyl; ororganic or inorganic acid addition salts thereof; and b) from about 20 through about 40% by weight of a hydrophilic polymer selected from hydroxypropyl methylcellulose (HPMC), methyl cellulose (MC), hydroxypropylcellulose (HPC), hydroxyethylcellulose (HEC), and polyethylene glycol (PEG), or mixtures of them; and c) from about 8 through about 50% by weight of an ionic compression agent selected from dicalcium phosphate (DCP) and CaSO4; and d) from 0 through about 50% by weight of a scale inhibitor selected from polyacrylate, acrylate copolymers and maleate copolymers wherein the polymers are of low to medium molecular weight, [e.g. Mw=500-50,000 g/mol], and organophosphonates [e.g., 1-hydroxyethylidene-1,1-diphosphonate (HEDP)]; or other scale inhibitors or mixtures thereof; and e) from 0 through about 20% by weight of a corrosion inhibitor selected from ZnCl2, and 1-hydroxyethylidene-1,1-diphosphonate (HEDP) or other known agents; and f) that the total of the components of a)-e), plus when present any other typical tablet components, equal 100% by weight of the tablet composition; and
provided that the following occur when in use:i) it is used in a water circulation system under operation conditions of multiple cycles while maintaining activity; andii) it removes, disperses, or inhibits biofilm deposits; and/oriii) it removes, disperses, or inhibits organic deposits; andiv) the slow release of the active components of the composition in such industrial water system is complete in from about 1 day to about 6 months.