| United States Patent | 5,458,742 |
| Mueller, et. al. | Oct. 17, 1995 |
| Inventors: | Mueller; Wolfgang (Wiesbaden, DE); Wirth; Uwe (Mainhausen, DE); Semel; Joachim (Eppstein/Ts., DE). |
| Assignee: | Hoechst Aktiengesellschaft (Frankfurt, DE). |
| Appl. No.: | 057,124 |
| Filed: | May 4, 1993 |
| May 6, 1992 [DE] | 42 14 980.0 |
| Intl. Cl.: | B01D 3/00 |
| U.S. Cl.: | 203/ 91; 159/DIG.26; 203/ 49; 203/100; 204/157.43; 204/157.47; 423/445.B |
| Field of Search: | 203/91, 100, 49; 202/205; 159/DIG. 16, DIG. 26; 423/445 B, 460, 461; 204/157.43, 157.47 |
| 2,513,991 | Jul., 1950 | Bradbury, III | 159/DIG.26 |
| 4,313,786 | Feb., 1982 | Smith | 159/DIG.26 |
| 5,023,056 | Jun., 1991 | Aklufi et al. | |
| 5,024,740 | Jun., 1991 | Birken et al. | 204/157.43 |
| 5,132,105 | Jul., 1992 | Remo | 423/446 |
| 5,196,396 | Mar., 1993 | Lieber | 423/414 |
| 5,227,038 | Jul., 1993 | Smalley et al. | 423/445B |
| 5,236,562 | Aug., 1993 | Okumura et al. | 204/157.43 |
| 5,271,890 | Dec., 1993 | Shimura et al. | 204/157.47 |
| 5,273,729 | Dec., 1993 | Howard et al. | 423/445B |
| 5,277,773 | Jan., 1994 | Murphy | 204/157.47 |
| 5,281,406 | Jan., 1994 | Stalling et al. | 423/445B |
| 5,304,366 | Apr., 1994 | Lorents et al. | 423/445B |
| 9204279 | Mar., 1992 | WO |
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In isolating fullerenes from fullerene-containing soot the soot is heated by using microwaves to from 300 deg. to 800 deg. C. and the evaporating fullerenes are condensed.