US4141685A
Expired / Lapsed
US
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Method of bleaching textile fibers and activated bath for the cold bleaching of such fibers
Assignee: Manufacture de Produits Chimiques Protex SARL
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Filing: 1977-07-25
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Granted: 1979-02-27
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Expires: 1997-07-25
Abstract
Abstract A sodium chlorite bath for the bleaching of textile fibers, e.g. cotton, is activated by one or more bisulfite derivatives of an organic-reducing compound having one or more aldehyde or ketone functional groups and which are capable of forming bisulfitic combination addition compounds with an alkali bisulfite. Such activators have been found to be effective in bringing about the progressive decomposition of the sodium chlorite of the bath and hence controlled bleaching at relatively low temperatures of the sodium chlorite bath.
Inventors
- 👤 Jean Balland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:13
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/20; D06L4/22; D06L4/24; D06L4/26
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
123 words
A composition for the activation of a sodium chlorite textile bleaching bath which consists of a bisulfitic derivative of an organic reducing compound and constituted of the reaction product of an alkali bisulfite selected from the group which consists of lithium bisulfite, sodium bisulfite and potassium bisulfite, with an aliphatic monoaldehyde having an alkyl or alkenyl group of 1 to 10 carbon atems, an aliphatic dialdehyde having an alkyl or alkenyl chain of 2 to 10 carbon atoms, an aliphatic monoketone having alkyl or alkenyl chains of 1 to 10 carbon atoms each connected to the ketocarbon, an aliphatic diketone having 1 to 10 carbon atoms in each alkyl or alkenyl group, or an aromatic aldehyde in which the aromatic group is phenyl.
Claim 2
Dependent Claim
123 words
A composition for the activation of a sodium chlorite textile bleaching bath which consists of a bisulfitic derivative of an organic reducing compound and constituted of the reaction product of an alkali bisulfite selected from the group which consists of lithium bisulfite, sodium bisulfite and potassium bisulfite, with an aliphatic monoaldehyde having an alkyl or alkenyl group of 1 to 10 carbon atems, an aliphatic dialdehyde having an alkyl or alkenyl chain of 2 to 10 carbon atoms, an aliphatic monoketone having alkyl or alkenyl chains of 1 to 10 carbon atoms each connected to the ketocarbon, an aliphatic diketone having 1 to 10 carbon atoms in each alkyl or alkenyl group, or an aromatic aldehyde in which the aromatic group is phenyl.
Claim 3
Dependent Claim
27 words
The composition defined in claim 1 wherein said organic compound is selected from the group which consists of formaldehyde, acetaldehyde, glycolicaldehyde, glyoxal, acetone, acetylketone, benzaldehyde and cinnamaldehyde.
Claim 4
Dependent Claim
126 words
An aqueous sodium chlorite bleaching bath for the bleaching of textiles which contains 1 to 30 g/l of a bisulfitic derivative of an organic reducing compound and constituted of the reaction product of an alkali bisulfite selected from the group which consists of lithium bisulfite, sodium bisulfite and potassium bisulfite, with an aliphatic monoaldehyde having an alkyl or alkenyl group of 1 to 10 carbon atoms, an aliphatic dialdehyde having an alkyl or alkenyl chain of 2 to 10 carbon atoms, an aliphatic monoketone having alkyl or alkenyl chains of 1 to 10 carbon atoms each connected to the ketocarbon, an aliphatic diketone having 1 to 10 carbon atoms in each alkyl or alkenyl group, or an aromatic aldehyde in which the aromatic group is phenyl.
Claim 5
Dependent Claim
126 words
An aqueous sodium chlorite bleaching bath for the bleaching of textiles which contains 1 to 30 g/l of a bisulfitic derivative of an organic reducing compound and constituted of the reaction product of an alkali bisulfite selected from the group which consists of lithium bisulfite, sodium bisulfite and potassium bisulfite, with an aliphatic monoaldehyde having an alkyl or alkenyl group of 1 to 10 carbon atoms, an aliphatic dialdehyde having an alkyl or alkenyl chain of 2 to 10 carbon atoms, an aliphatic monoketone having alkyl or alkenyl chains of 1 to 10 carbon atoms each connected to the ketocarbon, an aliphatic diketone having 1 to 10 carbon atoms in each alkyl or alkenyl group, or an aromatic aldehyde in which the aromatic group is phenyl.
Claim 6
Dependent Claim
20 words
The bath defined in claim 3 wherein said bisulfitic derivative is present in an amount between 3 and 10 g/l.
Claim 7
Dependent Claim
22 words
The bath defined in claim 4 which contains sodium sulfite in addition to said derivative in an amount up to 20 g/l.
Claim 8
Dependent Claim
20 words
The bath defined in claim 5 wherein said sodium sulfite is present in an amount between 2.5 and 10 g/l.
Claim 9
Dependent Claim
27 words
The bath defined in claim 3 wherein said organic compound is selected from the group which consists of formaldehyde, acetaldehyde, glycolicaldehyde, glyoxal, acetone, acetylketone, benzaldehyde and cinnamaldehyde.
Claim 10
Independent Claim
157 words
A method of bleaching textile fibers comprising the steps of: introducing into an aqueous sodium chlorite bleaching bath an activating bisulfitic derivative of an organic reducing compound and constituted of the reaction product of an alkali bisulfite selected from the group which consists of lithium bisulfite, sodium bisulfite and potassium bisulfite, with an aliphatic monoaldehyde having an alkyl or alkenyl group of 1 to 10 carbon atoms, an aliphatic dialdehyde having an alkyl or alkenyl chain of 2 to 10 carbon atoms, an aliphatic monoketone having alkyl or alkenyl chains of 1 to 10 carbon atoms each connected to the ketocarbon, an aliphatic diketone having 1 to 10 carbon atoms in each alkyl or alkenyl group, or an aromatic aldehyde in which the aromatic group is phenyl; treating said textile fibers with said bath at substantially ambient temperature for a period sufficient to effect whitening of said textile fibers; and thereafter washing and drying said textile fibers.
Claim 11
Independent Claim
157 words
A method of bleaching textile fibers comprising the steps of: introducing into an aqueous sodium chlorite bleaching bath an activating bisulfitic derivative of an organic reducing compound and constituted of the reaction product of an alkali bisulfite selected from the group which consists of lithium bisulfite, sodium bisulfite and potassium bisulfite, with an aliphatic monoaldehyde having an alkyl or alkenyl group of 1 to 10 carbon atoms, an aliphatic dialdehyde having an alkyl or alkenyl chain of 2 to 10 carbon atoms, an aliphatic monoketone having alkyl or alkenyl chains of 1 to 10 carbon atoms each connected to the ketocarbon, an aliphatic diketone having 1 to 10 carbon atoms in each alkyl or alkenyl group, or an aromatic aldehyde in which the aromatic group is phenyl; treating said textile fibers with said bath at substantially ambient temperature for a period sufficient to effect whitening of said textile fibers; and thereafter washing and drying said textile fibers.
Claim 12
Dependent Claim
23 words
The process defined in claim 8 wherein said bisultific derivative is present in an amount between 1 and 30 g/l in said bath.
Claim 13
Dependent Claim
25 words
The process defined in claim 9 wherein said bath further comprises an effective amount of neutral sodium sulfite up to an amount of 20 g/l.
Claim 14
Dependent Claim
42 words
The process defined in claim 10 wherein, after said textile fibers are impregnated with said bath, impregnating liquid is drained from said textile fibers and said textile fibers are stored in a plastic bag for a period of the order of hours.
Claim 15
Dependent Claim
14 words
The process defined in claim 9 wherein said bath has a pH below 5.5.
Claim 16
Dependent Claim
27 words
The process defined in claim 9 wherein said organic compound is selected from the group which consists of formaldehyde, acetaldehyde, glycolicaldehyde, glyoxal, acetone, acetylketone, benzaldehyde and cinnamaldehyde.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |