초록 ▼

A process has been developed for effectively purifying compressed air by removing water vapor, carbon dioxide and other impurities through the use of gas separation membrane systems. Gas separation membranes have been found which are capable of purifying air to a suitable level for operation of anal

A process has been developed for effectively purifying compressed air by removing water vapor, carbon dioxide and other impurities through the use of gas separation membrane systems. Gas separation membranes have been found which are capable of purifying air to a suitable level for operation of analytical instrumentation apparatus such as Fourier Transform Infrared analytical spectrometers and related instrumentation equipment. Impurities normally found in compressed air used in operation and purging of instrumentation devices include water vapor and CO2, which are strong absorbers of infrared radiation at wavelengths which interfere with analytical wavelengths and spectral regions commonly employed for analysis of a variety of organic and inorganic materials.

대표청구항 ▼

A process for generating instrument quality gas from compressed air, comprising; (a) contacting the compressed air with one side of a multicomponent, membrane comprised of a coated, graded-density skin membrane having macrovoid-free morphology; (b) permeating a majority of water vapor and carbon dio

A process for generating instrument quality gas from compressed air, comprising; (a) contacting the compressed air with one side of a multicomponent, membrane comprised of a coated, graded-density skin membrane having macrovoid-free morphology; (b) permeating a majority of water vapor and carbon dioxide components contained in the compressed air through the membrane; (c) removing non-permeate from a chamber containing the membranes; and (d) supplying the non-permeate for instrumentation use, the non-permeate stream having a dewpoint reduced by 50°C. or more, said dewpoint measured at the non-permeate pressure, and a carbon dioxide content of less than about 40 ppm.