公开(公告)号：AT118202T

公开(公告)日：1995-02-15

申请号：AT92113510

申请日：1992-08-07

Applicant: HOECHST AG

Inventor： DORN FRIEDRICH-WILHELM ,  SACHSE DIETER

IPC: C01B31/02

Abstract: In order to prepare a C60/C70 mixture called fullerene by evaporation of carbon at pressures from 0.05 to 3 bar, condensation of the gaseous carbon on cooled zones with the formation of a fullerene/soot mixture and separation of the fullerene from this mixture, the evaporation and condensation are carried out in oxygen-containing gases from the group comprising CO, CO2, O2 or mixtures thereof.

公开(公告)号：CA2076314A1

公开(公告)日：1993-03-07

申请号：CA2076314

申请日：1992-08-18

Applicant: HOECHST AG

Inventor： DORN FRIEDRICH-WILHELM ,  SACHSE DIETER

IPC: C01B31/02

Abstract: HOE 91/H 016 K Process for the preparation of fullerene In the process for the preparation of a C60/C70 mixture, known as fullerene, by vaporization of carbon under pressures of 0,05 to 3 bar, condensation of the gaseous carbon on cooled zones with the formation of a fullerene/carbon black mixture and separation of the fullerene from this mixture, the vaporization and condensation are carried out in oxygen-containing gases from the group comprising CO, CO2 and O2 or mixtures thereof.

公开(公告)号：DE59201359D1

公开(公告)日：1995-03-23

申请号：DE59201359

申请日：1992-08-07

Applicant: HOECHST AG

Inventor： DORN FRIEDRICH-WILHELM ,  SACHSE DIETER

IPC: C01B31/02

Abstract: In order to prepare a C60/C70 mixture called fullerene by evaporation of carbon at pressures from 0.05 to 3 bar, condensation of the gaseous carbon on cooled zones with the formation of a fullerene/soot mixture and separation of the fullerene from this mixture, the evaporation and condensation are carried out in oxygen-containing gases from the group comprising CO, CO2, O2 or mixtures thereof.

公开(公告)号：DE4220938A1

公开(公告)日：1994-01-05

申请号：DE4220938

申请日：1992-06-26

Applicant: HOECHST AG

Inventor： DORN FRIEDRICH-WILHELM DIPL CH ,  SACHSE DIETER

IPC: C01B31/02 ,  C01B31/00

Abstract: In the prodn. of a 60 C/70C mixt. known as fullerene (I) by vaporisation of C at 0.05-3, pref. 0.05-0.5 bar, condensation of the gaseous C in cooled zones to form a (I)/C black mixt. (II) and spen. of (I) from (II), the novelty is that vaporisation and condensation are carried out in a gas (III) contg. oxygen, consisting of CO, CO2 and/or O2. Pref. vaporisation and condensation are carried out in a mixt. of one or more (III) with nobel gases. (I) is sepd. from (II) by extn. with organic solvent or by vaporisation at elevated temp.

公开(公告)号：DE4129718A1

公开(公告)日：1993-03-11

申请号：DE4129718

申请日：1991-09-06

Applicant: HOECHST AG

Inventor： DORN FRIEDRICH-WILHLEM DIPL CH ,  SACHSE DIETER

IPC: C01B31/02

Abstract: Prodn. of a C60/C70 mixt. (fullerene) (I), comprises evaporating carbon at 0.05-0.5 bar, condensing the vapour on a cool surface to give a mixt. of (I) and carbon black, and extracting (I) with organic solvent. Evapn. and condensation are preformed in an oxygen-contg. gas i.e. CO, CO2, oxygen or a mixt. thereof, opt. with addn. of inert gas. USE/ADVANTAGE - The above gases are much cheaper than He which is normally used and their use enables a much higher evapn. rate from carbon electrodes for the same current density. (I) is useful as a starting material for new syntheses and materials. In an example, the process was performed in a metal vessel fitted with an EK 78 graphite (RTM) rod as cathode and an EK 86 graphite (RTM) rod as anode 2 mm. apart. The vessel was evacuated to 10 power (-5) bar, and then CO was passed through the system at 0.5 l/hr. at a constant pressure of 0.2 bar, while an arc was produced between the electrodes with I = 120 A (43 V) and maintained at 1-10 mm. by advancing the evaporating anode. The anode lost 104 mm. in 8.8 mins., corresp. to 5.93 g. graphite, and 4.33 g. carbon/fullerene mixt. (II) was collected from the water-cooled walls of the reactor, this mixt. contained 7.1% crude (I) as determined by exhaustive extn. with toluene and drying at 150 deg.C. With He instead of CO, the anode lost 105 mm. (6.53 g.) in 15 mins., and the yield was 3.28 g. (II) contg. 7.4 g. (I)