Number | Name | Date | Kind |
---|---|---|---|
3542509 | Furtig et al. | Nov 1970 | |
4557736 | Sircar et al. | Dec 1985 | |
4859217 | Chao | Aug 1989 | |
5152813 | Coe et al. | Oct 1992 | |
5174979 | Chao et al. | Dec 1992 | |
5258058 | Coe et al. | Nov 1993 | |
5268023 | Kirner | Dec 1993 |
Number | Date | Country |
---|---|---|
229391 | Nov 1985 | DEX |
Entry |
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"Lithium Zeolites Enhance Nitrogen Separation by PSA", Process Engineering, 70 #5, p. 22, 1989 (no month). |