Improvements in Bleaching Fibrous Substances Used for Making Paper.
Year: 1887

page_text: Date of Application, 2nd Apr., 1887.
Complete Left, 9th Aug., 1887.
Complete Accepted, 9th Sept., 1887.
Improvements in Bleaching Fibrous Substances Used for
Making Paper.
We ARTHUR BRIN of 59 Brompton Crescent in the County of Middlesex, Engineer
and Chemist and LEON QUENTIN BRIN, of 7 Rue Gavarni, Paris in the Republic of
France Engineer and Chemist, do hereby declare the nature of this invention to be as
follows:-
The object of our Invention is to effect the bleaching of fibrous substances used in
the manufacture of paper by means of bleaching agents in a gaseous form.
The pulp is thoroughly washed before or after leaving the breaking engine and
after having been mixed with a suitable quantity of water is run into a churn or
vessel fitted with revolving beaters or paddles and so constructed as to be readily
hermetically closed.
The pulp is violently agitated in the churn by the beaters or paddles and is submitted
whilst in a state of agitation to the action of chlor-ozone gas or an electrified mixture
of chlorine and oxygen gases admitted through a perforated pipe at the bottom of the
churn.
Upon completion of the agitation of the pulp with chlor-ozone as above described
the pulp is thoroughly washed and made into paper in the usual manner.
Any oxygen and chlorine not absorbed by the pulp during the churning operation
may be re-electrified and used over again or may be employed for revivifying the
oxide of manganese or other metallic oxide used in making the chlorine.

page_text: COMPLETE SPECIFICATION
Improvements in Bleaching Fibrous. Substances Used for
Making Paper.
We ARTHUR BRIN of.59 Brompton Crescent in the County of Middlesex Engineer
and Chemist and LEON QUENTIN BRIN of 7 Rue Gavarni Paris in the Republic of
France Engineer and Chemist 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 :-
The object of our Invention is to effect the bleaching of fibrous substances used in
the manufacture of paper by means of bleaching agents in a gaseous form. The pulp
of the fibrous materials is thoroughly washed before or after it leaves the breaking
engine and after having been mixed with a quantity of water if necessary to make it
of the proper consistency it is run into a churn or vessel fitted with revolving beaters
or paddles or with other suitable means for agitating the pulp. This churn or vessel
should be so constructed as to be readily closed to prevent escape of the gases used in
the treatment as hereinafter described. The pulp is violently agitated in the churn
or vessel by the beaters or their equivalents and whilst agitated the said pulp is
subjected to the action of a mixture of chlorine and oxygen gases which have been
electrified and are admitted into the churn or vessel which may be most conveniently
effected by means of a perforated pipe situated at the bottom of the said churn or
vessel. The electrifying of the chlorine and oxygen may be done in an apparatus
such as is used for producing ozone from oxygen and the electrified mixture of chlorine
and oxygen we call chlor-ozone. After the pulp has been treated by agitation in the
presence of chlor-ozone as described the pulp may be thoroughly washed and be then
used in the ordinary manner in the manufacture of paper.
Any chlorine and oxygen which escapes from the churn or vessel and has not been
absorbed as chlor-ozone by the pulp during the agitating or churning operation may
be re-electrified so as to be reconverted to chlor-ozone and be used again in the process
or the oxygen may be employed to revivify the oxide of manganese or other metallic
oxide used in the manufacture of the chlorine used in the process.
We will now describe with reference to the accompanying drawing how our inven-
tion may be carried out in practice but we do not limit ourselves to the precise details
we shall describe and illustrate.
A. is .a. container of oxygen gas. B is a retort partly immersed in water contained
in a vessel or boiler which can be heated by any suitable means. Into the retort B
are placed the matters from which the chlorine is produced for example black oxide
of manganese and hydrochloric acid. Oxygen in sufficient quantity to form the
required mixture of chlorine and oxygen and at the same time to revivify the black
oxide of manganese is admitted to the retort B from the container A by the pipe a
leading down into the black oxide of manganese in the said retort. The oxygen

page_text: and chlorine pass by the pipe a³ from the retort B into the wash bottle and there-
from by the pipe into the gasometer U to effect which the bell of the gasometer C
may be caused to rise by adding weights so as to withdraw the gases from the retort
and wash-bottle when the bell has become filled the weights are removed and the
gases by the descent of the bell are expelled through pipe e into the ozone generator F
in which they are highly electrified and converted into chlor-ozone. E represents the
Rhumkoff coil or other means of obtaining the necessary electric sparking for the
purpose and E is the battery charging the said coil. The electrified gases (chlor-
ozone) pass from the generator F by the pipe into the vessel G in which the pulp
is placed and agitated by the stirrer g. The pulp thus treated is removed and used
for paper making which may be performed in the usual manner. The oxygen and
chlorine which arise from the pulp are drawn back by the pipe d into the gasometer D
by the hell thereof being made to rise by adding weights and after it has become
filled by removing these weights the gases are by the descent of the bell forced
through the pipe d' into the retort. B to be again used in the process. The pipes are
furnished with valves and cocks to control the supply and direction of flow of the
gases.
Having now particularly described and ascertained the nature of our said Invention
and in what manner the same is to be performed we declare that what we claim is :—
First Bleaching fibrous substances used for making paper by means of electrified
chlorine and oxygen gases ("chlor-ozone").
Second Bleaching fibrous substances used for paper making by subjecting them
in the form of pulp to agitation in the presence of electrified chlorine and oxygen
gases (chlor-ozone).
Third-Bleaching fibrous substances used for paper making by subjecting them
to the action of electrified chlorine and oxygen (chlor-ozone) and collecting and
re-using in the process the unabsorbed gases substantially as herein before described.
Fourth-Bleaching fibrous substances used for paper making by treating them in
the manner and by means of the apparatus herein before described and illustrated in
the accompanying drawings.
Dated this 9th day of August 1887