# US 5,707,954 A · Stabilized brominated alkane solvent

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- Number: US 5,707,954 A
- Document ID: US5707954A
- Status: Granted
- Kind: A
- Application number: 08/609,590
- Filed: 1996-03-01
- Granted: 1998-01-13
- Earliest claimed: 1996-03-01
- Assignees: Albemarle Corporation
- Inventors: Burnell Lee
- Web page: https://patentgrep.com/patent/US5707954A

## CPC

- C11D 7/5018: {Halogenated solvents}
- C23G 5/028: containing halogenated hydrocarbons
- C11D 7/263: {Ethers}
- C11D 7/267: {Heterocyclic compounds}
- C11D 7/28: containing halogen
- C11D: DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C23G: CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS

## Abstract

A stabilized solvent composition which is comprised of: a solvent portion which includes at least 90 wt % n-propyl bromide; and a 1,4-dioxane-free stabilizer system which includes 2,2-dialkoxypropane in which each alkoxy group independently contains up to 3 carbon atoms. The solvent composition is useful as a degreaser and cleaner in both cold and vapor cleaning systems.

## Claims

### Claim 1

A stabilized solvent composition which is comprised of a solvent portion which includes at least 90 wt % n-propyl bromide and a 1,4-dioxane-free stabilizer system which consists essentially of 2.0-6.0 wt % 2,2-dialkoxypropane and at least one selected from the group consisting of about 0.045-1.0 wt % nitroalkane, about 0.045-1.0 wt % epoxide and about 0.045-1.0 wt % amine.

### Claim 2 (depends on 1)

The solvent composition of claim 1 wherein the n-propyl bromide is present in the solvent composition in an amount within the range of from about 94 to about 98 wt %.

### Claim 3 (depends on 1)

The solvent composition of claim 1 wherein the 2,2-alkoxypropane is 2,2-dimethoxy-propane.

### Claim 4 (depends on 1)

The solvent composition of claim 1 whereto the nitroalkane is nitromethane and the epoxide is 1,2-butylene oxide.

### Claim 5

A process for cleaning an article which comprises immersing the article in a solvent composition comprised of a solvent portion which includes at least 90 wt % n-propyl bromide and a 1,4-dioxane-free stabilizer system which consists essentially of 2.0-6.0 wt % 2,2-dialkoxypropane and at least one selected from the group consisting of about 0.045-1.0 wt % nitroalkane, about 0.045-1.0 wt % epoxide and about 0.045-1.0 wt % amine.

### Claim 6

A process for cleaning an article which comprises exposing the article to the vapor emanating from a boiling body of a solvent composition comprised of a solvent portion which includes at least 90 wt % n-propyl bromide and a 1,4-dioxane-free stabilizer system which consists essentially of 2.0-6.0 wt % 2,2-dialkoxypropane and at least one selected from the group consisting of about 0.045-1.0 wt % nitroalkane, about 0.045-1.0 wt % epoxide and about 0.045-1.0 wt % amine.