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Патент USA US2407039

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Patented Sept. 3, 19916
2,407,039
UNITED STATE S PATENT O F FICE
2,407,039
MANUFACTURE ÜF VINYL CHLÜRIDE
Herbert Muggleton Stanley, Tadworth, England,
assigner to The Distillers Company Limited,
Edinburgh, Scotland, a British company
N o Drawing. Application September 23, 1942, Se
rial No. 459,441. In Great Britain `luly 1,
1941
5 Claims.
(Cl. MSO-.656)
1
2
It is known that vinyl chloride can be prepared
leaving the reaction vessel. rJîhis output remained
by reacting acetylene and hydrogen chloride at
constant over a long period of operation.
Example 2.-30 parts of active carbon were
an elevated temperature in the presence of a
solid catalyst consisting of mercurio chloride sup
ported onactive carbon or other surface-active
carrier. The reaction is strongly exothermic‘ and
loss of mercury takes place from the catalyst
when the process is conducted in this manner,
impregnated with 5 parts of mercurio chloride
and the catalyst thus obtained, after drying, was
suspended in 300 parts of cli-isopropyl benzene
(B. P. 200° to 210° C.).
into a packed tower
suspension was filled
a mixture of acetylene
and hydrogen chloride bubbled through the
whilst local overheating, which results in sec
ondary reactions taking place is difficult to avoid. 10 tower, keeping the temperature at 135° C. by cool
According to the present invention acetylene
ing. The exit gases were led through a reflux
condenser and yielded 16 parts of vinyl chloride
and a hydrogen chloride are reacted together at
per hour, '25% of the introduced acetylene being
an elevated temperature in the presence of a cat
converted into vinyl chloride.
alyst consisting of a mercury compound, sup
Eœample 3.--A granular gas-absorption carbon
ported on active carbon and suspended in an 15
was ñnely powdered, impregnated with mercurio
inert liquid diluent, such as a hydrocarbon or
halogenated hydrocarbon, which is liquid at the
temperature of the react-ion. The preferred cata
chloride and suspended in pentachloroethane
(B. i?. 159° C). acetylene and hydrogen chloride
lyst is mercurio chloride.
were reacted in the presence of the catalyst sus
The presence of a
quantity of diluent has been found, somewhat 20 pension and results similar to those of the pre
ceding examples were obtained.
surprisingly, to have no adverse influence on the
it will be appreciated that any suitable mercury
activity of the catalyst whilst on the other hand
compound other than mercuric chloride may be
improved results are obtained. The presence of
used, e. g. mercurous chloride.
the diluent enables the temperature of the reac
tion medium to be controlled more accurately, 25 . What I claim is:
1. A process for the manufacture of vinyl chlo
as, for example, by means of cooling coils or
ride which comprises passing acetylene and hy
jackets. We have also found that, working in
this manner, the catalyst retains its activity over
drogen chloride into a suspension of active carbon
impregnated. with mercurio chloride in an inert
long periods. A further advantage is that less
of the active carbon support is required in this 30 diluent, selected from the group consisting of
hydrocarbons and chlorinated hydrocarbons
process than when no diluent is employed.
which are liquid between 120° and 150° C. and
Among the liquid substances suitable as dilu
ents, are included for example parañin oil, di
which do not dissolve mercurio chloride, which
isonropylbencene and pentachloroethane, but
inert diluent is maintained at a temperature
other inert liquid hydrocarbons or halogenated 35 Ibetween 120° and 150° C.
hydrocarbons, boiling at a temperature higher
2. A process according to claim 1 wherein the
than the reaction temperature may be employed;
suspension of the supported catalyst in the dilu
we have found that the optimum temperature
ent is pre-heated to the reaction temperature and
a gaseous mixture of acetylene and hydrogen
of the reaction lies between 120° and 150° C.
The process may be carried out by preheating
chloride is introduced into said suspension with
violent agitation.
to the desired temperature a suspension of the
supported catalyst in the diluent liouid, and pass
3. A process for the manufacture of vinyl chlo
ride which comprises passing acetylene and hy
ing into this a gas mixture of acetylene and hy
drogen chloride into a suspension in paraffin oil
drogen chloride, the whole being vigorously agi
tated. External heating is then stopped, and the 45 of active carbon impregnated with mercuric
temperature of the reaction medium is thereafter
chloride, said parañìn oil being maintained at a
controlled by cooling.
temperature between 120° and 150° C.
Examples
Example 1.-18 parts of a ñnely powdered de
colorising carbon known under the trade name
“Super Norit” (Norit being a registered trade
mark) were impregnated with a solution of 6
4. A process for the manufacture of Vinyl chlo
ride which comprises passing acetylene and hy
50 drogen chloride into a suspension in di-isopropyl
benzene of active carbon impregnated with Iner
curic chloride, said di-iso‘propylbenzene being
maintained at a temperature between 120° and
parts of mercurio chloride in methyl alcohol,
150° C.
dried in vacuo and thereafter suspended in 300 55 5. A process for the manufacture of vinyl chlo
parts of parañîn oil. A gaseous mixture of ap
ride which comprises passing acetylene and hy
proximately equal parts of acetylene and hydro
drogen chloride into a suspension in pentachloro
gen chloride was blown. through the liquid, which
ethane of active carbon impregnated with mer
was stirred. The reaction temperature was kept
curio chloride, said pentachloroethane being
at 140° C., the heat of reaction being removed 60 maintained at a temperature between 120° and
by means of a cooling jacket. 17 parts of vinyl
150° C.
chloride per hour were condensed out of the gases
HERBERT MUGGLETON STANLEY.
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