Esparto, Wood, Rags, and like Fibrous Substances.
Year: 1885

page_text: Esparto, Wood, Rags, and like Fibrous Substances.
We ROBERT CHARLES MENZIES, of Inveresk Mills near Musselburgh in the
County of Midlothian, Paper Manufacturer, and CHARLES FREDERICK CROSS, and
EDWARD JOHN BEVAN of 249 High Holborn London, Chemists, do hereby declare
the nature of the said invention for "IMPROVEMENTS IN THE PREPARATION OF
PAPER PULP FROM STRAW, ESPARTO, WOOD, RAGS, AND LIKE FIBROUS SUBSTANCES,"
to be as follows:-
The object is to treat fibrous substances suitable for use in the manufacture of
paper pulp that the separation of the fibres and disintegration of the material is
more rapidly and efficiently effected and the pulp obtained is more readily bleached
than has hitherto been done.
The invention consists essentially in subjecting the substances after they have
been pulped and before they are bleached to the action of chlorine gas and an
alkali.
In carrying our process into effect we take pulp obtained by any of the ordinary
processes from straw, esparto, wood, rags or like fibrous substances, wash the said
pulp and saturate it with an alkaline solution of a nature and strength adapted to
the amount of 'disintegrating and 'bleaching action it is necessary to produce. The
excess of liquor is then drained off or otherwise removed and the pulp is exposed
to the action of chlorine gas until no more is taken up. The pulp is then washed
to, free it from the alkali and soluble products of decomposition of the fibre con-
stituents, and is then further dealt with by the ordinary methods.

page_text: Esparto, Wood, Rags, and like Fibrous Substances.
We ROBERT CHARLES. MENZIES, of Inveresk Mills near Musselburgh, in the
county of Midlothian Paper Manufacturer, and CHARLES FREDERICK CROSs and
EDWARD JOHN BEVAN of 249 High Holborn, London Chemists 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 is to so treat fibrous substances suitable for use in the manufacture of
paper pulp that the separation of the fibres and disintegration of the material is
more rapidly and efficiently effected and the pulp obtained is more readily bleached
than has hitherto been done.
The invention consists essentially in subjecting the substances after they have
been pulped and before they are bleached to the action of chlorine gas and an
alkali.
In carrying our process into effect we take pulp obtained by any of the ordinary
processes from straw esparto, wood, rags, or like fibrous substances, wash the said
pulp and saturate it with an alkaline solution of a nature and strength adapted to
the amount of disintegrating and bleaching action it is necessary to produce. The
excess of liquor is then drained off or otherwise removed and the pulp is exposed
to the action of chlorine gas until no more is taken up. The pulp is then washed
to free it from the alkali and soluble products of decomposition of the fibre con-
stituent and is then further dealt with by the ordinary methods.
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
Subjecting fibrous substances for making paper after they have been pulped and
before they are bleached to the action of chlorine gas and an alkali.