Improved Apparatus for the Manufacture of Resinous Soap.
Year: 1899

page_text: Date of Application, 8th Feb., 1899-Accepted, 6th May, 1899
Improved Apparatus for the Manufacture of Resinous Soap.
FRITZ ARLEDTER, Engineer, 28, Queen Street, London, E.C., do hereby declare
the nature of this invention and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement;-
My invention relates to improvements of an apparatus for the manufacture
of resinous soap containing a high percentage of unsaponaceous resin.
According to my invention abietine acid resin is boiled under pressure in a
stationary boiler for some hours with alkali & water with or without the addition
of starch, paraffin oil, carbonic acid or the like.
Fig. 1. The boiler B which is steam-jacketed up to points G¹ & G2, is stationary
& can be heated by indirect steam through pipe i p or by direct steam through
pipe d
P, which also serves to clean the outlet 0 of the boiler B. The inner
boiler is provided with gauge gi & safety valve V J, the outer boiler with
gauge go & safety valve V O. The inner boiler is divided into 2 parts by a
false bottom fb which is perforated & covered with a coarse wire net W N.
The false bottom is supported by stands S1 2 3 4 Another finer wire net wn is
fixed nearer the bottom to retain impurities which have not been retained by
the coarse wire net. Both nets & the perforated false bottom are in segments
& can be easily cleaned from time to time. The manhole of boiler B specially
described in Fig. 2, is surrounded by a stout iron ring A into which channel
c d e f is cut; both sides of this channel are cut down to points b a & g h so
that 2 sharp edges are formed, deb & ef y, which go in 2 circles round the
manhole. On these sharp edges the manhole cover C comes to rest, which is
grooved at rst & tu vin such a way that it will always touch the edges of
the manhole ring in 4 points viz. r, c, f, & v. When the cover C is screwed
on, 4 steam-tight rings are formed round the manhole, every one of which will
prevent an escape of steam. So no packing whatever is required & no escape has
ever been noticed, even after the edges were worn down.
The boiler B is now filled with water up to a few inches under the false bottom.
Then alkali is put on the false bottom about 7% of the quantity of dry resin
used, the manhole is closed & indirect steam turned on slightly at Z i. The soda
is quickly dissolved in a most thorough manner, the steam is blown off through
tap T, the manhole opened & resin in as large pieces as possible is filled in. The
manhole cover is put on & full steam is turned on at Zi or at Z d. After a few
hours boiling tap OT is opened by turning handle H, & the liquid mass is
blown through the steam jacketed filter F. This filter is heated by waste steam
through pipe Zw to keep the solution at boiling heat. The condensed water
runs away through C w. The filter is divided in 3 or more compartments by
perforated plates which are covered with wire nets & easily removable for clean-
ing purposes. The compartments of the filter are filled with filter material
such as carbon, glasswool, asbestos, felt or the like. The filter is closed by
cover fc. The purified soap after passing the filter is pressed through P into
elevated tanks & ready for use.

page_text: Among the advantages of these improvements of manufacture may be specially
mentioned:
a) The stationary boiler has the great advantage over the rotary boiler that
the purification of the resin soap is already begun in the boiler where all larger
impurities as pieces of wood, stones are retained, so that the filter cannot get
choked, further by reducing the cost of production by saving steam & a lower
cost of machinery, further by saving space as the stationary boiler is put under-
ground.
b) By making the outer boiler to reach only half the height of the inner boiler
the resin is prevented from melting too quickly, it melts slowly & has ample
time to get saponified. This rather shortens the time of boiling.
c) Owing to the special construction of the manhole no packing is required,
which would have to be renewed at every boiling & an absolute steam-tight
fitting is obtained.
The steam jacketed filter prevents a cooling & therefore thickening of the
soap, so that it can be pressed through as many compartments as are required to
obtain the desired purity of the soap, this allows the commonest resin to be used
at a great saving of cost.
Having now particularly described the nature of my said invention & in what
manner same is to be performed I declare that what I claim is:-
Manufacture of resinous soap containing unsaponaceous resin over 30% con-
sisting in boiling rosin & alkali under pressure in a stationary boiler.
a) With an outer boiler reaching half the height of the inner boiler.
b) With false bottom & wire nets.
With specially constructed manhole without packing.
d) In connection with steam jacketed filter, divided into or more parts.
D1
011 1. 1800