# US 8,784,573 B1 · Methods for using improved urea hydrochloride compositions

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- Number: US 8,784,573 B1
- Document ID: US8784573B1
- Status: Granted
- Kind: B1
- Application number: 14/048,559
- Filed: 2013-10-08
- Granted: 2014-07-22
- Earliest claimed: 2009-04-07
- Assignees: Green Products & Technologies, L.L.C.
- Applicants: Green Products & Technologies, L.L.C.
- Inventors: John T. MacDonald, III
- Web page: https://patentgrep.com/patent/US8784573B1

## CPC

- C11D 1/72: Ethers of polyoxyalkylene glycols
- C11D 3/042: {Acids}
- C11D 3/2006: {Monohydric alcohols}
- C11D 3/2072: {Aldehydes-ketones}
- C11D 3/30: Amines; Substituted amines {; Quaternized amines}
- C11D 3/323: {urea or derivatives thereof}
- C09K 8/03: Specific additives for general use in well-drilling compositions
- C09K 8/62: Compositions for forming crevices or fractures
- C11D 2111/24: Mineral surfaces, e.g. stones, frescoes, plasters, walls or concretes
- C11D: DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

## Abstract

A composition including HCl, urea, complex substituted keto-amine-hydrochloride, an alcohol, an ethoxylate, and a ketone is provided in a method for solubilizing calcium carbonate in an aqueous suspension or dispersion of calcium carbonate.

## Claims

### Claim 1

A method for solubilizing calcium carbonate in an aqueous suspension or dispersion of calcium carbonate, the method comprising:
providing a composition comprising HCl, urea, complex substituted keto-amine-hydrochloride, an alcohol, an ethoxylate, and a ketone;
adding the composition to an aqueous suspension or dispersion of calcium carbonate; and
permitting the composition to solubilize the aqueous suspension or dispersion of calcium carbonate.

### Claim 2 (depends on 1)

The method recited in claim 1, wherein the alcohol comprises at least one of isopropyl alcohol and propargyl alcohol.

### Claim 3 (depends on 1)

The method recited in claim 1, wherein the ethoxylate comprises ethoxylated nonylphenol and the ketone comprises methyl vinyl ketone.

### Claim 4 (depends on 1)

The method recited in claim 1, further comprising diluting the composition by 10-85% by volume composition in water prior to the composition adding step.

### Claim 5 (depends on 1)

The method recited in claim 1, wherein the composition comprises: HCl, 55 wt %; urea, 42 wt %; complex substituted keto-amine-hydrochloride, 0.067 wt %; isopropyl alcohol, 0.067 wt %; ethoxylated nonylphenol, 0.022 wt %; propargyl alcohol, 0.022 wt %; methyl vinyl ketone, 0.022 wt %; acetone, 0.022 wt %; and acetophenone, 0.0022 wt %.