N-propyl Bromide Based Solvent Compsitions And Methods for Cleaning Articles
AssigneeAlbemarle Corporation
InventorsKeiji Ando, Hisashi Miwa
Life of this patent
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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.
Claims19
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.
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.
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.
Dependencies are inferred from the claim text.