# US 8,784,679 B2 · Aqueous powder water treatment compositions and methods for making same

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- Number: US 8,784,679 B2
- Document ID: US8784679B2
- Status: Granted
- Kind: B2
- Application number: 13/280,987
- Filed: 2011-10-25
- Published: 2013-04-25
- Granted: 2014-07-22
- Earliest claimed: 2011-10-25
- Assignees: DuBois Chemicals, Inc.
- Applicants: Richard M. Moore; Lyle H. Steimel
- Inventors: Richard M. Moore; Lyle H. Steimel
- Web page: https://patentgrep.com/patent/US8784679B2

## CPC

- C02F 1/66: by neutralisation; pH adjustment (for degassing C02F1/20; using ion-exchange C02F1/42; for flocculation or precipitation of suspended impurities C02F1/52; for removing dissolved compounds C02F1/58)
- C02F 5/105: {combined with inorganic substances}
- C02F 2103/02: Non-contaminated water, e.g. for industrial water supply
- C02F 2303/08: Corrosion inhibition
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)

## Abstract

Embodiments of a method of producing an aqueous powder composition for treating water comprise mixing sodium metabisulfite powder with amines, wherein the amines comprises liquid cyclohexylamine, and adding water to the mixture of sodium metabisulfite powder and liquid cyclohexylamine to catalyze the production of the aqueous powder composition.

## Claims

### Claim 1

A method of producing a dry powder composition for treating water comprising:
mixing sodium metabisulfite powder with amines, wherein the amines comprise liquid cyclohexylamine; and
adding water to the mixture of sodium metabisulfite powder and liquid cyclohexylamine to catalyze production of the dry powder composition,
wherein the dry powder composition consists of about 35 to about 55% by weight of amines, wherein the amines comprise liquid cyclohexylamine and optionally one or more additional amines, about 35 to about 55% by weight of bisulfites selected from the group consisting of sodium bisulfite, sodium metabisulfite, and mixtures thereof, and about 5 to about 10% by weight of water.

### Claim 2 (depends on 1)

The method of claim 1 wherein the dry powder composition is free of phosphates.

### Claim 3 (depends on 1)

The method of claim 1 further comprising adding additional amines to the mixture of sodium metabisulfite powder and liquid cyclohexylamine prior to the addition of water.

### Claim 4 (depends on 3)

The method of claim 3 wherein the additional amines are selected from the group consisting of diethylaminoethanol, morpholine, or combinations thereof.

### Claim 5 (depends on 1)

The method of claim 1 further comprising cooling the dry powder composition to room temperature.

### Claim 6 (depends on 1)

The method of claim 1 wherein the sodium metabisulfite and amines are mixed at a ratio by weight of about 1.5:1 to about 1:1.5.