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United States Patent 5,458,742
Mueller, et. al.Oct. 17, 1995

Isolation of fullerenes

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

Foreign Application Priority Data
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

References Cited

U.S. Patent Documents
2,513,991Jul., 1950Bradbury, III 159/DIG.26
4,313,786Feb., 1982Smith 159/DIG.26
5,023,056Jun., 1991Aklufi et al.
5,024,740Jun., 1991Birken et al. 204/157.43
5,132,105Jul., 1992Remo 423/446
5,196,396Mar., 1993Lieber 423/414
5,227,038Jul., 1993Smalley et al. 423/445B
5,236,562Aug., 1993Okumura et al. 204/157.43
5,271,890Dec., 1993Shimura et al. 204/157.47
5,273,729Dec., 1993Howard et al. 423/445B
5,277,773Jan., 1994Murphy 204/157.47
5,281,406Jan., 1994Stalling et al. 423/445B
5,304,366Apr., 1994Lorents et al. 423/445B

Foreign Patent Documents
9204279Mar., 1992WO

Other References

Primary Examiner: Manoharan; Virginia
Attorney, Agent or Firm: Curtis, Morris & Safford


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.

4 Claims, No Drawings

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