close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2122889

код для вставки
2,122,889
Patented July 5, 1938
UNITED STATES PATENT "OFFICE
2.122.889
raocnss FOR THE PRODUCTION or
.
out Mues,
acsmm
Franktort-on-the-Main-Schwan
helm. Germany, assignorv to I. G.-Farbenin
dustrie
Aktiengesellschaft, _Frankfort-onvthe
Main, Germanyv
‘ No Drawing. Application June 718,"lil38,i8erial
' No. 85,845; In Germany ‘June 22, .1935‘ ,
4 cam; ‘(cits-+216)
The present invention relates to a process for
from the calcium carbide, according to'the inven
the production of acetylene from calcium car_-v . tion, by stirring the mixture containing the com
bide and water.
ponents‘ during the gasi?cation and exposing si
The calcium hydroxide formed in 'the'produc
5 tion of acetylene by the action of waterfon calci
um carbide, encases the carbide more or less and
thus hinders further access of water to it. In
this manner the speed of production of‘ the gas is
diminished, and in consequence of the hindered
10 removal of heat polymerization phenomena are
apt to occur. Moreover, moisture contained in
the mud or the water necessary for the formation
of calcium hydroxide, which water becomes lib
erated when the hydroxide is decomposed, is the
15 source of undesired subsequentgasi?cation, the
con'trol of which is not practicable.
;
p Gasi?cation processes have already been de
scribed in which the subsequent gasi?cation is
more or less completely avoided. In these proc
20 esses the water necessary for the gasi?cation is
added in closes with constant mixing. of the car
bide with the calcium hydroxide produced. The
proportion of added water is so adjusted that a
practically dry calcium hydroxide is produced.
' In contrast with the usual acetylene generator in
which calcium hydroxide is left in the excess of
water in the form of mud, in the‘known process
multaneously the hydroxide thereby detached
from the carbide to the action of the current of
inert or combustible gases or mixtures of such
gases. Examples of inert gases may be nitrogen
-or carbon dioxide, as combustible gases there may
be named hydrogen, carbon monoxide, mixtures
of these gases or-acetylene, for instance the acet 10
ylene produced. in the apparatus itself. These
gases separate, in the manner of a wind-sifter, the
pulverulent light hydroxide from the heavy pieces
of carbide, carrying it forward from the gasi?ca
tion chamber into another chamber in which it 15
can settle._ If the acetylene produced in the ap
paratus itself is used as the gas current, it may be
circulated, that is to say it may be returned from
the settling chamber into the gasi?cation cham
ber. The gas not used in the circulation leaves 20
the generator at a suitable point.
, I claim:
I
1. A process for the production of acetylene
from calcium carbide which comprises adding
only so fnuch water. to the calcium carbide as is 25
‘necessary for the production of acetylene and a
practically dry calcium hydroxide while simul
there is the advantage that there is. little after- \ taneously. stirring the mixture of calcium car
gasi?cation. On the other hand, there still per
30 sists a possibility that by encasing the pieces of
bide, and ‘calcium; hydroxide formed during the
process and separating the calcium hydroxide 30
carbide the calcium hydroxide will prevent the , from the calcium carbide by the action of a cur
rent of an inert gas conducted therethrough with
cation is diminished and the danger of the forma
such a speed as to carry away the calcium hydrox
tion of polymerization products arises.
,
ide having been detached by the mechanical stir
The present invention relates to a process in ‘ ring.
35
35
which not only is after-gasi?cation diminished or
‘access of‘ water, whereby the speed of 'gasi?
2. A process for the production of acetylene
avoided, but also there is no hindrance to the
speed of ga'si?cationand the danger of polymeri~
zation phenomena is avoided. The invention is
40 based on the idea of separating as quickly as pos
sible after its production the calcium hydroxide
from the calcium carbide. In thismanner the
water always has access to a clean surface of
45
carbide whereby thehi'ghest speed of-gasi?cation
is obtained. ‘_Moreover, the danger of polymeri
zation no longer exists because the cooling action
of the arriving water is fully used in absorbing
from calcium carbide which comprises adding
only so much water to the calcium carbide as is
necessaryvfor the production of the acetylene and
a practically dry calcium hydroxide while simul 40
taneously stirring-the mixture of calcium car
bide, and calcium hydroxide formed during the
process and separating the calcium hydroxide
from the calcium carbide by‘ the action of a cur
rent of acetylene conducted therethrough with 45
such a speed as to‘ carry away the calcium hy
droxide having been detached by the mechanical
the heat of the reaction. Finally, there is an ex
stirring.
traordinarily small after-gasiiication, since the
3. _A process for the production of acetylene
from calcium carbide which comprises adding 50
50 _water contained in the calcium hydroxide pro
duced, in consequence of its immediate removal
from the sphere of action, cannot attack the
carbide. - As in the known process, only. so much
water is added that a practically dry calcium hy-‘s
55 droxide is produced. This product is separated
only so much water to the calcium. carbide as is
necessary vfor the production of acetylene and a
practically dry-calcium hydroxide while simul
taneously stirring the mixture of calcium carbide‘,
and calcium hydroxide formed during the process
2
.
-
2,122,889
and separating the calcium hydroxide from the
calcium carbide by the action of a current of an
inert gas conducted therethrough with such a
speed as to carry awayvthe calcium hydroxide
having been detached by the mechanical stirring,
the gas being passed in a circulating stream.
4. ‘A process vfor the production of acetylene
from calcium carbide which comprises adding
only so much water to the calcium carbide as is
10 necessary for the production vof acetylene and a
practically dry calcium hydroxide while simul
taneously stirring the mixture of calcium carbide,
and calcium hydroxide formed during the process
and separating the calcium hydroxide from the
calcium carbide by the action of a current of
acetylene conducted therethrough with such a
speed as to carry away the calcium hydroxide
having been detached by the mechanical stirring,
the acetylene being passed in a circulating stream.
O'I'I‘O MUES.
10
Документ
Категория
Без категории
Просмотров
0
Размер файла
188 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа