AN IMPROVED PROCESS Of MAKING A KIND OF FIBROUS LIGNEOUS CELLULOSE SUITABLE FOR PAPER MAKING AND FOR OTHER PURPOSES TO WHICH CELLULOSE
Year: 1883

page_text: LETTERS PATENT to Alexander Melville Clark of the firm of A. M. and
W Clark of 53 Chancery Lane in the County of Middlesex, Fellow of the
Institute of Patent Agents for an Invention of AN IMPROVED PROCESS Of
MAKING A KIND OF FIBROUS LIGNEOUS CELLULOSE SUITABLE FOR PAPER
MAKING AND FOR OTHER PURPOSES TO WHICH CELLULOSE IS
communicated to him from abroad by Rudolf Blitz of Paris, France
APPLICABLE
PROVISIONAL SPECIFICATION left by the said Alexander Melville Clark at
the Office of the Commissioners of Patents on the 29th June 1883.
ALEXANDER MELVILLE CLARK of the firm of A. M and W Clark of 53 Chancery
Lane in the County of Middlesex Fellow of the Institute of Patent Agents
AN IMPROVED PROCESS OF MAKING A KIND OF FIBROUS LIGNEOUS CELLULOSE
SUITABLE FOR PAPER MAKING AND FOR OTHER PURPOSES TO WHICH CELLULOSE
IS APPLICABLE [communicated to him from abroad by Rudolf Blitz of Paris,
France
This Invention relates to the manufacture of a kind of fibrous ligneous cellulose,
white or otherwise, presenting the characteristics of rag pulp and capable of being
used in the place of cellulose for all the purposes to which it is applied and more
especially for the manufacture of paper.
In carrying out the Invention the wood which may be any kind of soft wood or
other fibrous vegetable material is reduced into small fragments by means already
known and used in the treatment of cellulose or ligneous matters and then treated
in a boiler for from 4 to 8 hours according to the nature of the wood under a
pressure of 3 to 4 atmospheres, with hydrosulphite of soda caustic soda and
vanadiate of ammonia dissolved in hydrochloric acid.
The bydrosulphite of soda may be replaced by the hydrosulphite of potash or of
any other alkali or suitable alkaline earth
When hydrosulphito of potash is used caustic potash would be used instead of
D
"

page_text: caustic soda and the same rule should be observed in other cases in order to obtain
advantageous results.
When this "lixiviation" is complete, the wood is submitted to the action of a
beating engine such as used in the manufacture of cellulose, or a disintegrator or
defibrator such as used for making wood pulp
The cellulose thus obtained may be bleached by any of the ordinary processes,
it is very supple and felts readily.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Alexander Melville Clark in the Great Seal Patent Office on the
29th December 1883.
ALEXANDER MELVILLE CLARK of the firm of A. M. and W. Clark of 53 Chancery
Lane, in the County of Middlesex. Fellow of the Institute of Patent Agents.
"AN IMPROVED PROCESS OF MAKING A KIND OF FIBROUS LIGNEOUS CELLULOSE
SUITABLE FOR PAPER MAKING AND FOR OTHER PURPOSES TO WHICH CELLULOSE
IS APPLICABLE A communication to me from abroad by Rudolph Blitz of Paris,
France,
"
This Invention relates to the manufacture of a kind of fibrous ligneous cellulose,
white or otherwise, presenting the characteristics of rag pulp and capable of being
used in the place of cellulose for all the purposes to which it is applied and more
especially for the manufacture of paper.
In carrying out the Invention the wood which may be any kind of soft wood or
other fibrous vegetable material is reduced into small fragments by means already
known and used in the treatment of cellulose or ligneous matters and then treated
in a boiler for from 4 to 8 hours according to the nature of the wood, under a
pressure of 3 to 4 atmospheres, together with the following matters of which the
proportions given are not absolute and may be modified. For 127 cubic feet of
wood I take 13 lbs. av. of hydro-sulphite of soda, 6 lbs. of caustic soda and
15 grains of vanadiate of ammonia dissolved in 60 grains of hydrochloric acid.
The hydrosulphite of soda may be replaced by the hydrosulphite of potash or of
any other alkali or suitable alkaline carth.
When hydrosulphite of potash is used caustic potash would be used instead of
caustic soda and the same rule should be observed in the other cases in order to
obtain advantageous results.
When this "lixiviation" is complete, the wood is submitted to the action either
of a beating engine such as used in the manufacture of cellulose, or a disintegrator
or defibrator such as used for making wood pulp.
The cellulose thus obtained may be bleached by any of the ordinary processes,
it is very supple and felts readily.
The above process may be utilised in the treatment of all vegetablo inatters.

page_text: Having described the nature of the said Invention and the manner of performing
the same, I declare that what I claim as the Invention to be protected by the
hereinbefore in part recited Letters Patent is:
1 The manufacture of cellulose, presenting the characteristics of rag pulp and
suitable for replacing the same in all its applications, by mixing with wood pulp,
hydrosulphite of soda (or of potash) caustic soda (or potash) and vanadiate of
ammonia, dissolved in hydrochloric acid, in the proportions specified or in other
suitable proportions.
2nd The application of the mixture or mixtures hereinbefore specified, for the
treatment of wood, and other similar vegetable material, for converting the same
into fibres, suitable for the manufacture of paper and other uses to which cellulose
is applied, substantially as described and for the purpose specified.
In witness whereof, I the said Alexander Melville Clark, have hereunto set
my hand and seal this twenty ninth day of December A.D. 1883.
A
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CLARIZ