Patent GB-404118-A (GB)
Title: A method of disaggregating cellulose fibres in liquids
IPC: D21B1/16
Filed: 1932-11-07
Abstract: Aggregates of cellulose fibres of small dimensions, such as paper pulp or disintegrated paper or cotton, are mixed with water or an alkaline solution to disaggregate the fibrous aggregates, the liquid is then displaced by another liquid miscible with the first, and this displacing operation repeated, if necessary, until the cellulose fibres are obtained in contact with the required liquid.  For example, the fibrous aggregates are first treated with water or an alkaline solution, in which disaggregation takes place by simple mixing, part of the liquid is then expressed, and the remainder displaced by acetone by protracted washing.  The acetone is displaced in a similar manner by petrol and the petrol by mineral oil.  In a similar manner disaggregations may be obtained in contact with vegetable oils, and solvents such as ether, acetone, benzene, alcohol, and chloroform, and used in the treatment of the corresponding liquids.  The Specification as open to inspection under Sect. 91 refers also to the preparation in a similar manner of dispersions of cellulose in the form of micelles.  This subject-matter does not appear in the Specification as accepted.ALSO:Aggregates of cellulose fibres of small dimensions, such as paper pulp or disintegrated paper or cotton, are mixed with water or an alkaline solution to disaggregate the fibrous aggregates, the liquid is then displaced by another liquid miscible with the first, and this displacing operation repeated, if necessary, until the cellulose fibres are obtained in contact with the required liquid.  For example, the fibrous aggregates are first treated with water or an alkaline solution, in which disaggregation takes place by simple mixing, part of the liquid is then expressed, and the remainder displaced by acetone by protracted washing.  The acetone is displaced in a similar manner by petrol, and the petrol by mineral oil.  Cellulose fibres in this form are suitable for carrying out decolorizing, filtering, clarifying, and purifying operations on mineral oil.  In a similar manner disaggregations may be obtained in contact with vegetable oils, and solvents such as ether, acetone, benzene, alcohol, and chloroform, and used in the treatment of the corresponding liquids.  Filters may be obtained for treating these or other liquids in which the aggregates of cellulose fibres do not disaggregate by mere immersion, by obtaining in the above manner a disaggregation in the required liquid, and separating the fibres in the form of a pad of the required thickness and compactness.  The Specification as open to inspection under Sect. 91 refers also to the preparation in a similar manner of dispersions of the cellulose in the form of micelles.  This subject-matter does not appear in the Specification as accepted.ALSO:Aggregates of cellulose fibres of small dimensions, such as paper pulp or disintegrated paper or cotton, are mixed with water or an alkaline solution to disaggregate the fibrous aggregates, the liquid is then displaced by another liquid miscible with the first, and this displacing operation repeated, if necessary, until the cellulose fibres are obtained in contact with the required liquid.  For example, the fibrous aggregates are first treated with water or an alkaline solution, in which disaggregation takes place by simple mixing, part of the liquid is then expressed, and the remainder displaced by acetone by protracted washing.  The acetone is displaced in a similar manner by petrol and the petrol by mineral oil.  Cellulose fibres in this form are suitable for carrying out decolorizing, filtering, clarifying, and purifying operations on mineral oil.  In a similar manner disaggregations may be obtained in contact with vegetable oils, and solvents such as ether, acetone, benzene, alcohol, and chloroform, and used in the treatment of the corresponding liquids.  Filters may be obtained for treating these or other liquids in which the aggregates of cellulose fibres do not disaggregate by mere immersion, by obtaining in the above manner a disaggregation in the required liquid, and separating the fibres in the form of a pad of the required thickness and compactness.  The Specification as open to inspection under Sect. 91 refers also to the preparation in a similar manner of dispersions of cellulose in the form of micelles.  This subject-matter does not appear in the Specification as accepted.