Apparatus for the preparation of cellulose xanthate

Dec. 1, 1931.
\ I
M, DAS§QNV|LLE
1,834,605
APPARATUS FOR THE PREPARATION OF CELLULOSE XANTHATE
Filed Sept. 28, 1929
3 Sheets-Sheet 1
Dec- 1,‘ 1931.
M. DASSONVILLE
‘
1,834,605
APPARATUS FOR THE PREPARATION OF GELLULOSE XANTHATE
Filed Sept. 28, 1929
‘s Sheets-Sheet 2
Dem 1, 1931-
M. DASSONVILLE
‘1,834,605
APPARATUS FOR THE APREPARATION OF CELLULOSE XANTHATE
Filed Sept. 28, 1929
3 Sheets-Sheet 3
4m.
Patented Dec. 1, 1931
1,834,605
PATENT OFFICE I’
UNITED STATES
MICHEL DASSONVILLE, on PARIS, runner, ASSIGNOR T0 socrn'rn n’nxrrorrxrrons
nns rnxrrnns NQUVEAUX; or GENEVA, SWITZERLAND,’ A CORPORATION or :i
SW‘ ITZEELAND
APPARATUS FOR THE PREPARATION OF CELLULOSYE XANTHATE
Application ?led September 28, 1929; Serial No. 395,982, and inl‘rance July 1, 1929.
This invention relates to apparatus'for the lated during the action of the alkali cellulose
production of cellulose xanthate, comprising by the carbon bisulphide.
a double jacketed churn which is slowly ro
The poles of the caps are respectively pro
tated round an axis during the reaction of the vided with ?anges 5 and 6 to which are se
carbon disulphide on the alkali cellulose, and cured the journals 7 and 8, each journal being 555i
the object of the invention is a construction supported by a bearing 9 in which the said
10
which enables‘ a-?nal product to be obtained
which is absolutely homogeneous, free from
particles of alkali cellulose unattached by
carbon bisulphide and also free from any
excess of bisulphide.
‘
-
r
;
a
r
journal may revolve, each bearing being
carried by a support 10.
l
~The apparatus can be given'two different p _,
motions. (1) A revolving motion of both
caps around the principal axis and (2) a
In its preferred form the ‘said apparatus linear motion of one of the caps in respect to
consists of a metallic container or churn, the other, along the axis. ’
15
formed by two sphericalfcaps, capable‘ of The slow revolving motion is transmitted
withstanding pressure and vacuum, which to the churn by means of a worm wheel 11 65'1
slowly revolvesfaround an axis during, the fast on journal 7 and a worm 12 on the shaft
whole preparation of the xanthate. ' The con
13 of a pair of fast and loose pulleys 14 and
struction of the said apparatusenables the 15 respectlvely. A striking gear 16' enables
temperature of the re-acting mass to be con the apparatus to be started and stopped
20
tinuously controlled, in'orderto regulate the
according to the needs of the operator;
action of the carbon bisulphide and to ‘bring -
7
The_ linear motion of one of the ‘ spherical
the xanthate by the end of the preparation to caps 1n respect to the other in the axial direc-'
the temperature most-convenient for mixing tion enables xanthate to be discharged and
i. e. for the solutionof the xanthate in alkali the apparatus to be cleaned. A thorough
cleaning is easy to accomplish and the worker
l e.
= yThe invention is illustrated by way of operates in open air thus avoiding dangers
example in the accompanying drawings, of poisoning.
The linear motion is de?ned and limited by
the length of the removable distance pieces~17
Figure 1 is a longitudinal section of the which normally engage beneath the heads of
which are intended to make clear the applica
tion and operation of the invention. '
apparatus.»
‘
-
-
'
‘
the bolts 17w.
80
'
Theaxial movementv of one of the'caps is
Figure 2 is an end view, and v
v
»
provided for by the end of the journal 8
Figure 3 is a plan view of the apparatus.
Referring to the drawings‘ it will be-seen being furnished with a square threaded. screw
that both spherical caps 1 and 1'b,'of same 18 meshing in a nut 19 ?xed axially but which
radius with perfectly smootlrinternal walls, .can be'rotated from a hand wheel, 22 through
so that no alkali cellulose particles will be re gears 20 and 21. Alocking device 23 enables
tained, are assembled on small circles of the the square threaded screw and its nut to ro
same diameter. The connecting joint 2, tate’as a whole during the rotation of the
made between male and female conical mem churn, care being previously taken to dis
bers, held together by means of nuts and bolts v‘connect the hand wheel and the pinion 21 by
17a, renders the apparatus?uid tight during
the whole preparation of the cellulose xan
90
means of a lever disengaging device 24.
‘ The apparatus isfurther provided with‘ a
conducting pipe for the carbon bisulphide,
Both spherical cap members constituting constituted by a cylindrical conduit located
the container or'churn are provided with a in
the axis
device
of the
26 apparatus
placed under
and fed
pressure.
by
double jacket 3, between which continuity is gauging
thate.
‘
I
ensured, even during the opening of the appa
ratus, by means of two'?exible'tubes 4:, en
abling a heating or cooling fluid to be circu
The carbon bisulphide is volatilized andt-he
alkali cellulose particles driven by the- re~
volving motion, roll upon the smooth walls
100
2
1,834,605
of the apparatus, successively o?ering all able cap, and then back through the second
their surfaces to the action of the atmosphere half of the ?xed cap.
saturated with carbon bisulphide. An advan
In order to facilitate the loading of the ap
tageous arrangement for the introduction of paratus, manholes 36 of suitable diameter are
carbon bisulphide is that shown in-the draw
provided at a convenient height. The process 70
ings, wherein the journal 7 is provided with is watched through the sights 37. The tight
ness of the joints of the manholes and of the
The apparatus also comprises means for the sights is obtained by the use of suitable ma
removal by suction and the recovery of car terials resistant to carbon bisulphide and hav
a central admission conduit.
10 bon bisulphide vapours.
ing no roughness capable of retaining par
‘
To this end, the churn is internally pro
ticles of material already treated or to be
vided with a funnel 27 connected to the re treated.
covering apparatus by means of a conduit 25
What I claim is :—
15
and a vacuum pump. At the?end of the re— ~
action the carbon bisulphide vapours satu
1. Apparatus for the manufacture of cel
lulose xanthate comprising a pair of caps
rating the atmosphere of the churn are sucked making joint, means for rotating said caps
out and the excess liquid sulphide impregnat as a whole, and means for moving saidcaps
ing theparticles of xanthate is volatilized. apart axially.
In order to. avoid cellulose xanthate ?akes
:20 from being carried off under the action of the
75
80
2. Apparatus for the manufacture of cel
lulOse xanthate comprising a pair of spher- _ .
vacuum the funnel 27 is provided with a ical calotte shaped caps making joint on the
screen 28'perforated with holes of small ‘di same small circle and having smooth internal
ameter constituting asieve. In this way losses surfaces, means for rotating said caps as a
of the manufactured product, obstruction of .whole, and'means for moving said caps apart
the pipes and coating of the vacuum pump
3. Apparatus for the manufacture of cel
An important factor enabling the cellulose lulose xanthate comprising a pair of churn
axially.
are
avoided. ‘
~
'
.
‘
‘
xanthate to be obtained in the'best conditions members makingjoint, means. for rotating
'is thatit is possible ‘to control thetempera said churn members as a whole, means for
ture of the reacting mass at every instant. moving said churn members apart axially,
The viscose obtained by mixing the xanthate and means for guiding and limiting the rela
is improved when the xanthate is obtained
at the proper temperature. In the present
invention an arrangement has been provid
ed for the purpose,‘ consisting of the double
jacket 3 and the circulation of a heating or
coolingr ?uid. Internal ribs 29 acting as baf
?es not only strengthen the apparatus, but
tive motion of said churn. members during
such axial movement.
'
4. Apparatus for the manufacture of cel
lulosexanthate comprising a pair of churn
100
members making joint, means for rotating
said churn members and axial screw means
‘on one of said churn members for movinnr
it
‘C)
also ensure a propericirculation of the ?uid. away from and‘ towards the other ‘churn
As above mentioned continuity through member.
the double jacket is obtained even during
5. Apparatus for the manufacture of cel
the opening of the apparatus, by means of the lulose xanthate comprising a pair of double
flexible tubes 4 connecting both spherical caps jacketed churn members making joint, means
and arranged at the opposite ends of one or for rotating said churn members, means for
:45 more diameters ; rapidly operable connections moving said churn members apart‘ axially,
30, mounted on valves 31 permit‘ very easy and ?exible conduits coupling the jackets of
removal of the ?exible tubes, while by open said churn members.
'
ing the above mentioned valves, ‘very rapid
6. Apparatus for the manufacture of cel
complete ‘discharge of the double acket can lulose xanthate comprising a pair of double
.59 be effected.
'
I
105
UL
j acketedchurn members making joint, means
An advantageous construction which en for rotating said churn members, inlet and
sures the continuity of the circulation of the outlet conduits both-joined to the jacket ‘of
heatingyor cooling ?uid in the double jacket one of said churn members, and ba?ies in said
consists in the provision of the admission and jackets to direct the flow therein ‘of a tem
voutlet conduits 32, 33 of the above mentioned perature controlling medium from said in
jacket in the journal- 7. This construction let through half the jacket to which it is
is further characterized by the feature that COHHBCtQdLthBHCQ through the other-jacket,
with only two ?exible tubes 4, at opposite and thence through the other half of the
to which said outlet conduit is con
ends of a single diameter, the admission and jacket
nected.
'
outletconnections 34 and 3570f the double
7.
Apparatus
for
themanufacture
cel—
jacket-are located in the plane of the ?ex~ lulose xanthate comprising a pair of ofchurn
ible tubes. The circulation of the ?uid agent members making joint, a journal on each said
owing to the distribution of the baffles, is churn member, saidjournals being coaxial,
' from one half of the fixed cap to the Inov-' means for rotating said churn _ members
120
125
130
1,834,605
through one of said journals, a screw formed
on one of said journals, a nut meshing with
said screw, means for rotating said nut with
respect to said screw, and means for locking
said nut to said screw.
8. Apparatus for the manufacture of cel
lulose xanthate comprising a pair of caps
making joint, means for rotating said caps
10
15
as a Whole, means for moving said caps apart
axially, nuts and bolts for holding said caps
together and removable distance pieces on
said bolts enabling said caps to move apart
without removal of said nuts and bolts.
9. Apparatus for the manufacture of cel
lulose xanthate comprising a pair of double
jacketed caps making joint, means includ
ing a journal on one of said caps for rotat
ing said caps as a whole, means for mov
20
ing said caps apart axially, two diametrical
1y opposite ?exible tubes connecting the
jackets of said caps, inlet and outlet conduits
for a cooling medium formed within said
journal, and pipes connecting said conduits
25
with said jackets, said tubes, conduits and
pipes being arranged in a common axial
plane.
30
10. Apparatus for the manufacture of cel
lulose xanthate comprising a pair of churn
members making a circumferential joint, an
axial journal on each of said members, means
for rotating one of said journals, and means
for moving said churn members apart axially.
35
11. Apparatus for the manufacture of cel
lulose xanthate comprising a pair of hollow
members making a circumferential joint,
means for rotating said hollow members as
a whole, and means for moving said hollow
members apart axially.
12. Apparatus for the manufacture of cel
lulose xanthate comprising a jacketed churn,
an axial journal fast on said churn, means
for rotating said journal churn, means for
feeding carbon bisulphide axially of said
45
journal, and inlet and outlet conduits for
circulating a temperature controlling medium
in said jacket formedwithin and rotating
with said journal.
13. Apparatus for the manufacture of cel
lulose xanthate comprising a pair of jacketed
churn members making joint, means for ro
tating said churn members, means for mov
ing said churn members apart axially, and
rapidly detachable ?exible tubes connecting
55
the jackets of said churn members.
14. Apparatus for the manufacture of cel~
lulose xanthate comprisinga pair of jacketed
60
churn members making joint, means for r0
tating said churn members, means for mov
ing said churn members apart axially, a
valve on each of said jackets, and ?exible
tubes connecting said valve junctions.
In testimony whereof I have signed my
name to this specification.
$5
MICHEL DASSONVILLE.

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