An Improvement in the Bleaching of Textile and Pulping Materials in vacuo.
Year: 1892

page_text: Date of Application, 30th Mar., 1892
Complete Specification Left, 22nd Dec., 1892-Accepted, 4th Feb., 1893
PROVISIONAL SPECIFICATION.
An Improvement in the Bleaching of Textile and Pulping Materials
in vacuo.
We, EUGENE HERMITE, Edward JAMES PATERSON, and CHARLES FRIEND
COOPER, all of Pownall Road, Dalston, in the County of Middlesex, Electrical
Engineers, do hereby declare the nature of this invention to be as follows:-
The results of bleaching in vacuo by the processes and apparatus usually
employed are not satisfactory owing to the insufficient discolouring powers of the
bleaching solutions employed (such for example as calcium hypochlorite) and also
to the fact that there are present in these solutions free bases which attack and
become fixed on the fibre under treatment.
The object of this invention is to avoid these objectionable results which we
effect by supplying the vacuum vessel with an electrolysed solution of a chloride
such as magnesium chloride or mixtures therewith of sodium chloride or other
chlorides. Such electrolysed chloride solutions have a highly oxidising power
producing a rapid and complete bleaching, and as they contain no free bases the
fibres thus treated remain quite free from such bases do not become deteriorated
but retain their full strength and suppleness. The process may be applied to
cotton and other vegetable fibres before treating them for textile purposes or to
materials for pulping.
Dated this 30th day of March 1892.
ABEL & IMRAY,
Agents for the Applicants.
An Improvement in the Bleaching of Textile and Pulping Materials
in vacuo.
We EUGENE HERMITE, EDWARD JAMES PATERSON, and CHARLES FRIEND
COOPER all of Pownall Road, Dalston in the County of Middlesex, Electrical
Engineers, 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 results of bleaching in racuo by the processes and apparatus usually
employed are not satisfactory, owing to the insufficient discolouring powers of the
bleaching solutions employed (such for example as calcium hypochlorite) and also
to the fact that there are present in these solutions free bases which attack and
become fixed on the fibre under treatment.
The object of this invention is to avoid these objectionable results which we
effect by supplying the vacuum vessel with an electrolysed solution of a chloride
such as magnesium chloride or mixtures therewith of sodium chloride or other
chlorides. Such electrolysed chloride solutions have a highly oxidising power
producing a rapid and complete bleaching, and as they contain no free bases, the
fibres thus treated remain quite free from such bases, do not become deteriorated,
but retain their full strength and suppleness. The process may be applied to
cotton and other vegetable fibres before treating them for textile purposes or to
materials for pulping.

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
The herein described process for bleaching textile and pulping materials by
supplying vacuum vessels employed for bleaching or dyeing with solutions,
previously electrolysed, of magnesium chloride or other chloride or mixtures of
chlorides.
Dated this gond day of Decembar 1000
ABEL & IMRAY,
Agents for the Applicants.