# US 2013/0276830 A1 · N-propyl Bromide Based Solvent Compsitions And Methods for Cleaning Articles

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- Number: US 2013/0276830 A1
- Document ID: US20130276830A1
- Status: Published application
- Kind: A1
- Application number: 13/994,957
- Filed: 2011-12-12
- Published: 2013-10-24
- Earliest claimed: 2010-12-17
- Assignees: Albemarle Corporation
- Inventors: Keiji Ando; Hisashi Miwa
- Web page: https://patentgrep.com/patent/US20130276830A1

## CPC

- C11D 3/43: Solvents
- C11D 1/521: {Carboxylic amides (R1-CO-NR2R3), where R1, R2 and R3 are alkyl or alkenyl groups}
- C11D 1/72: Ethers of polyoxyalkylene glycols
- C11D 3/2003: {Alcohols; Phenols}
- C11D 3/201: {linear}
- C11D 2111/14: Hard surfaces
- C11D: DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL

## Abstract

n-Propyl bromide based solvent compositions and methods for cleaning articles using said solvent compositions are provided. Such solvent composition comprise about 50 weight percent to 99 weight percent of n-propyl bromide, about 0.5 weight percent to 50 weight percent of alcohol, and at least 0.005 weight percent of a surfactant. Such solvent compositions remove at least one of water or water soluble contaminants. The solvent compositions and methods of the present invention are useful as a degreaser and/or cleaner in both for cold cleaning and hot rinsing systems for cleaning articles.

## Claims

### Claim 1

A solvent composition comprising:
a. about 50 weight percent to about 99 weight percent of n-propyl bromide;
b. about 0.5 weight percent to about 50 weight percent of alcohol; and
c. at least 0.005 weight percent of surfactant.

### Claim 2 (depends on 1)

The solvent composition of claim 1 wherein the concentration of n-propyl bromide is about 80 weight percent to about 98 weight percent.

### Claim 3 (depends on 1)

The solvent composition of claim 1 wherein the concentration of n-propyl bromide is about 88 weight percent to about 95 weight percent.

### Claim 4 (depends on 1)

The solvent composition of claim 1 wherein the alcohol is a monohydric aliphatic alcohol.

### Claim 5 (depends on 4)

The solvent composition of claim 4 wherein the alcohol comprises 1-propanol, isopropyl alcohol, 1-butanol, 2-butanol, isobutyl alcohol, tertiary butyl alcohol, 1-heptanol, or 1-hexanol and pentanol.

### Claim 6 (depends on 1)

The solvent composition of claim 1 wherein the surfactant comprises a non-ionic surfactant, or a product of reaction between a fatty acid reactant and an amine reactant.

### Claim 7 (depends on 6)

The solvent composition of claim 6 wherein the non-ionic surfactant comprises polyoxyethylene alkyl ether, polyoxyethylene sec-alcohol ether or polyoxyethylene alkyl phenyl ether.

### Claim 8 (depends on 6)

The solvent composition of claim 6 wherein the non-ionic surfactant is biodegradable.

### Claim 9 (depends on 7)

The solvent composition of claim 7 wherein the fatty acid reactant comprises a C6 to C12-containing aliphatic monocarboxylic acid.

### Claim 10 (depends on 7)

The solvent composition of claim 7 wherein the amine reactant comprises C6 to C12-containing aliphatic monoamines.

### Claim 11

A method of cleaning an article, the method comprising contacting the article with a solvent composition for removing at least one of water or water soluble contaminants, wherein the solvent composition comprises about 50 weight percent to about 99 weight percent n-propyl bromide, about 0.5 weight percent to about 50 weight percent alcohol, and at least about 0.005 weight percent of a surfactant.

### Claim 12

A method of removing at least one of water or water soluble contaminants from an article, the method comprising:
a) contacting the article in a sump filled with a solvent comprising:
i. about 50 weight percent to about 99 weight percent n-propyl bromide;
ii. about 0.5 weight percent to about 50 weight percent alcohol; and
iii. at least 0.005 weight percent surfactant;
b) introducing a mixture comprising the solvent, and water or water-soluble contaminants to a tank for separation; and
c) returning the separated solvent to the sump.

### Claim 13 (depends on 11, 12)

The method of claim 11 or 12 wherein the alcohol is a monohydric aliphatic alcohol comprising 1-propanol, isopropyl alcohol, 1-butanol, 2-butanol, isobutyl alcohol, tertiary butyl alcohol, 1-heptanol, or 1-hexanol and pentanol.

### Claim 14 (depends on 11, 12)

The method of claim 11 or 12 wherein the surfactant comprises a non-ionic surfactant, or a product of reaction between a fatty acid reactant and an amine reactant.

### Claim 15 (depends on 14)

The method of claim 14 wherein the non-ionic surfactant comprises polyoxyethylene alkyl ether, polyoxyethylene sec-alcohol ether or polyoxyethylene alkyl phenyl ether.

### Claim 16 (depends on 14)

The method of claim 14 wherein the fatty acid reactant comprises a C6 to C12-containing aliphatic monocarboxylic acid.

### Claim 17 (depends on 14)

The method of claim 14 wherein the amine reactant comprises a C6 to C12-containing aliphatic monoamines, including mixtures thereof.

### Claim 18 (depends on 11, 12)

The method of claim 11 or 12 wherein the article comprises a metal product, a glass product, plastics, a polymeric substrate, or an electronic component or article.

### Claim 19 (depends on 11, 12)

The method of claim 11 or 12 wherein the method comprises cold cleaning or hot rinsing.