Hoechst Aktiengesellschaft

Uwe Wirth

Peter Hopp

Joachim Semel

Thomas Bayer

Ulrich Holst

Wolfgang Mueller

In isolating fullerenes from fullerene-containing soot the soot is heated by using microwaves to from 300.degree. to 800.degree. C. and the evaporating fullerenes are condensed.

Isolation of fullerenes

Microwave heating of intact Trigonopsis variabilis cells to 60.degree.-68.degree. C. for 20-40 seconds selectively deactivates esterases and catalases while retaining the activity of D-amino acid oxidase. The heating is effected with a microwave frequency of 0.4-24 GHz.

Process for the selective deactivation of esterases and catalases in

The invention relates to a process for the reactivation of an activated charcoal catalyst employed in the preparation of 1,1,1,2,3,3,3-heptafluoropropane (R 227) in which the catalyst is heated to from 450.degree. to 900.degree. C. in a stream of inert gas or under reduced pressure.

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Mainhausen, Germany

Uwe Wirth