Chemistry Reference
In-Depth Information
Tab. 2.1.
Recently disclosed processes for the preparation of phosgene.
Patent/Application
Number
Authors
Owner
Main Claims of the Patent
DE 19916856 A1
23/09/1999
H. Eckert, B.
Gruber, J.
Auerweck
Dr. Eckert GmbH,
Hallbergmoos,
DE (D-85399)
Phosgene manufactured from
CO, Cl
2
, and metal (Al, Ga)
halide (Cl) catalyst. Low
CCl
4
contents of
<
1 ppm
in batch process.
US 5891319
06/04/1999
F. J. Freiere, K. B.
Keating, E. K.
Sakata
DuPont, USA
Electrochemical, low-
temperature, uncatalyzed
process for the production
of carbonyl halides (not
specific to phosgene).
WO 9914159, 1999
EP 1017623 B1, 2002
US 6399822 B1, 2002
JP 2001516692, 2001
DE 1974057, 1999
(15/09/1997)
H. Eckert, B.
Gruber, N.
Dirsch
Dr. Eckert GmbH,
Hallbergmoos,
DE (D-85399)
Method and device for
preparing phosgene
from diphosgene and/or
triphosgene, by reaction on
a catalyst comprising
compounds with one or
several N atoms with a pair
of deactivated electrons.
PCT WO 9828227
02/07/1998
W. Cicha, L. E.
Manzer
DuPont, USA
Process for producing
phosgene from CO and Cl
2
using a carbon catalyst
having an active metal
content of
1000 ppm.
b
JP 10120410 A2
12/05/1998
S. Nakano
Teijin Chem. Ltd.,
Japan
Phosgene manufactured in
the presence of an
activated C catalyst, by the
reaction of Cl
2
and CO
containing
6.0 mol% H.
Yellowing of the phosgene
obtained is prevented by
reducing the H content in
CO.
a
PCT WO 9800364
08/01/1998
W. Cicha, L. E.
Manzer
DuPont, USA
Process for producing
phosgene having a low
CCl
4
content from CO and
Cl
2
at
300
C using a
silicon carbide catalyst
prepared by contacting
silicon monoxide with
finely divided carbon.
a
JP 9059012 A
04/03/1997
T. Hosomi, T.
Takada
Mitsubishi Gas
Chem. Co.,
Japan
Crude phosgene having a
CCl
4
content of
100 ppm
(v/v) is produced from CO
and Cl
2
using active carbon
as catalyst. The crude
phosgene is liquefied at
<
