An Improvement in the Production of Cellulose Solution Adapted for Spinning.
Year: 1899

page_text: Date of Application, 27th June, 1899
Complete Specification Left, 2nd Mar., 1900-Accepted, 21st Apr., 1900
PROVISIONAL SPECIFICATION.
An Improvement in the Production of Cellulose Solution Adapted
for Spinning.
I, JOHN IMRAY, of Birkbeck Bank Chambers, Southampton Buildings, in the
County of London, Consulting Engineer and Chartered Patent Agent, do hereby
declare the nature of this invention (as communicated to me from abroad by the
Consortium Mulhousien. pour la fabrication de fils brillants, of Mulhouse, Ger-
many, Manufacturers) to be as follows:-
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My foreign correspondents have found that concentrated solutions of cellulose
suitable for the manufacture of threads may be prepared in the following manner.
Cleansed cotton, cellulose, hydrocellulose, oxycellulose, or hydrated cellulose
are, at a low temperature and in a state of very minute division, treated with a
solution of caustic soda, containing about 16 per cent. of Na OH. For one mole-
cule of cellulose calculated as CHO or the corresponding quantities of the
other derivatives, two molecules of Na OH are required. The substance is then
thoroughly mixed in the cold with an amount of a finely powdered cupric salt,
for instance sulphate of copper, CuSO4+5H,0, corresponding to the quantity of
caustic soda, riz. one molecule of CuSO4 + 5HO for two molecules of the soda.
The paste thus obtained is easily soluble in concentrated aqueous ammonia,
yielding a blue viscid liquid suitable for spinning purposes and containing seven
to eight per cent. of dissolved cellulose.
Date this 07th love of Tune 1800
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improvement in the Production of Cellulose Solution Adapted
for Spinning.
I, JOHN IMRAY, of Birkbeck Bank Chambers, Southampton Buildings, in the
County of London, Consulting Engineer and Chartered Patent Agent, do hereby
declare the nature of this invention (as communicated to me from abroad by the
Consortium Mulhousien pour la fabrication de fils brillants, of Mulhouse, Ger-
many, Manufacturers) and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
My foreign correspondents have found that concentrated solutions of cellulose
suitable for the manufacture of threads may be prepared in the following manner.
Cleansed cotton, cellulose, hydrocellulose, oxycellulose, or hydrated cellulose
are, at a low temperature and in a state of very minute division, treated for half

page_text: 10'
an hour or longer with a solution of caustic soda, containing about 16 per cent.
of Na OH. For one molecular proportion of cellulose calculated as CHO, or
the corresponding quantities of the other derivatives, two molecular proportions
of NaOH are required. The mixture is thoroughly mixed in the cold with an
amount of a finely powdered cupric salt, for instance, copper sulphate, CuSO4, 5H,O,
corresponding with the quantity of caustic soda, viz. one molecular proportion
of CuSO. 5HO for two molecular proportions of NaOH. The paste thus obtained
is easily soluble in concentrated aqueous ammonia, yielding a blue viscid liquid
suitable for spinning purposes and containing seven to eight per cent. of dissolved
cellulose.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I declare that I make no
general claim to the treatment of cellulose so as to obtain a product adapted for
spinning but what I claim is :-
The improvement in the production of cellulose solutions adapted for spinning,
consisting in first treating a suitable form of cellulose with a solution of caustic
soda and then mixing the whole with a powdered cupric salt, substantially as
and for the purpose set forth.
Dated this 2nd day of March 1000
ABEL & IMRAY,.
Agents for the Applicant.