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US 5,401,429 AGranted
Azeotropic compositions containing perfluorinated cycloaminoether
AssigneeMinnesota Mining and Manufacturing Company
InventorsRichard M. Flynn, Mark W. Grenfell, Frank W. Klink, Daniel R. Vitcak
Life of this patent
Estimating the term…
Abstract
An azeotropic composition includes a perfluorinated cycloaminoether and an organic solvent.
Claims2
An azeotropic composition, which when fractionally distilled produces a distillate fraction which is an azeotrope, and consists essentially of:
- (A) within 10% of the quantity, by weight, of the perfluorocycloaminoether contained in the azeotrope, which perfluorocycloaminoether is selected from the group consisting of perfluoro-N-methylmorpholine and perfluoro-N-ethylmorpholine;
- and
- (B) within 10% of the quantity, by weight, of the organic solvent contained in the azeotrope, which organic solvent is selected from the group consisting of 2,2,4-trimethylpentane and cyclopentane;
- with the proviso that if the perfluorocycloaminoether is perfluoro-N-methylmorpholine, the organic solvent is either 2,2,4-trimethylpentane or cyclopentane, and if the perfluorocycloaminoether is perfluoro-N-ethylmorpholine, the organic solvent is 2,2,4-trimethylpentane;
- and
- wherein the azeotrope distillate fraction produced from the azeotropic composition consisting essentially of perfluoro-N-methylmorpholine and 2,2,4-trimethylpentane contains about 98 weight percent perfluoro-N-methylmorpholine and about 2 weight percent 2,2,4-trimethylpentane and has a boiling point of 51.degree. C. at one atmosphere pressure;
- and
- wherein the azeotrope distillate fraction produced from the azeotropic composition consisting essentially of perfluoro-N-methylmorpholine and cyclopentane contains about 81 weight percent perfluoro-N-methylmorpholine and 19 weight percent cyclopentane and has a boiling point of 36.degree. C. at ambient pressure;
- and
- wherein the azeotrope distillate fraction produced from the azeotropic composition consisting essentially of perfluoro-N-ethylmorpholine and 2,2,4-trimethylpentane contains about 90 weight percent perfluoro-N-ethylmorpholine and about 10 weight percent 2,2,4-trimethylpentane and has a boiling point of 71.degree. C. at one atmosphere pressure.
7 more elements
An azeotrope consisting essentially of:
- (A) perfluorocycloaminoether selected from the group consisting of perfluoro-N-methylmorpholine and perfluoro-N-ethylmorpholine;
- and
- (B) an organic solvent selected from the group consisting of 2,2,4-trimethylpentane and cyclopentane;
- with the proviso that if the perfluorocycloaminoether is perfluoro-N-methylmorpholine, the organic solvent is either 2,2,4-trimethylpentane or cyclopentane, and if the perfluorocycloaminoether is perfluoro-N-ethylmorpholine, the organic solvent is 2,2,4-trimethylpentane;
- and
- wherein the azeotrope consisting essentially of perfluoro-N-methylmorpholine and 2,2,4-trimethylpentane contains about 98 weight percent perfluoro-N-methylmorpholine and about 2 weight percent 2,2,4-trimethylpentane and has a boiling point of 51.degree. C. at one atmosphere pressure;
- and
- wherein the azeotrope consisting essentially of perfluoro-N-methylmorpholine and cyclopentane contains about 81 weight percent perfluoro-N-methylmorpholine and 19 weight percent cyclopentane and has a boiling point of 36.degree. C. at ambient pressure;
- and
- wherein the azeotrope consisting essentially of perfluoro-N-ethylmorpholine and 2,2,4-trimethylpentane contains about 90 weight percent perfluoro-N-ethylmorpholine and about 10 weight percent 2,2,4-trimethylpentane and has a boiling point of 71.degree. C. at one atmosphere pressure.
7 more elements
Dependencies are inferred from the claim text.