DE473869C - Process for bleaching wool and semi-wool - Google Patents
Process for bleaching wool and semi-woolInfo
- Publication number
- DE473869C DE473869C DEC37476D DEC0037476D DE473869C DE 473869 C DE473869 C DE 473869C DE C37476 D DEC37476 D DE C37476D DE C0037476 D DEC0037476 D DE C0037476D DE 473869 C DE473869 C DE 473869C
- Authority
- DE
- Germany
- Prior art keywords
- wool
- bleaching
- permanganate
- bleached
- hypochlorite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
- D06L4/10—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen
- D06L4/13—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen using inorganic agents
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Detergent Compositions (AREA)
Description
Verfahren zum Bleichen von Wolle und Halbwolle Es ist bekannt, Wolle wie auch Halbwolle mit Hilfe von Permanganatlösungen zu bleichen, außerdem kennt man Verfahren, Wolle für besondere Zwecke »vorzuchloren«.Process for bleaching wool and semi-wool It is known to wool as well as bleaching half wool with the help of permanganate solutions one method of "pre-loading" wool for special purposes.
Der Fortschritt des vorliegenden Verfahrens beruht nun darauf, daß gefunden wurde, <laß diese sonst in zwei Stufen getrennt vorzunehmende Behandlung in einem Arbeitsgang oder unmittelbar nacheinander unter Fortlassung der sonst - üblichen Zwischenspülungen vorgenommen wird, und daß dadurch eine wesentliche Verkürzung der Bleichdauer wie auch eine bedeutende Vereinfachung der Wollveredelung überhaupt erzielt wird: Beispiel Zwei Teile Kaliumpermanganat und die.Lösung eines Hypochlorits in einer Menge, die einem Teil wirksamen Chlors entspricht, werden auf eine Flottenlänge von i :2o gebracht und in der Menge von ¢1 Permanganat und 2°/a wirksamem Chlor, auf das Gewicht der Halbwolle berechnet, angewandt, nachdem letztere mit einer Schwefelsäurelösung von i ° Be getränkt worden ist. Die Bleichzeit kann für normale Fälle auf etwa i Stunde und selbst weniger angesetzt werden, sie wird im übrigen dem angewandten Stoff und dem angestrebten Ziel entsprechend bemessen. Es folgt die übliche Nachbehandlung mit sauren, reduzierenden Bädern und Auswaschen.The progress of the present procedure is based on the fact that was found, <leave this treatment, which otherwise has to be carried out separately in two stages in one operation or in immediate succession, omitting the otherwise - usual intermediate rinsing is carried out, and that thereby a substantial shortening the bleaching time as well as a significant simplification of wool processing in general is achieved: Example Two parts of potassium permanganate and the solution of a hypochlorite in an amount corresponding to one part of effective chlorine, are added to the length of the liquor brought from i: 2o and in the amount of ¢ 1 permanganate and 2 ° / a effective chlorine, calculated on the weight of the half-wool, applied after the latter with a sulfuric acid solution has been soaked by i ° Be. For normal cases, the bleaching time can be about i Hour and even less, it will be applied to the rest of the time Measure the substance and the desired goal accordingly. The usual follow-up treatment follows with acidic, reducing baths and washing out.
Für Wolle gilt die gleiche Behandlungsweise; zweckmäßig wird aber die Konzentration des Bleichmittels niedriger gehalten, z. B. auf etwa i1(2 °/a wirksames Chlor und 3 °,lo Permanganat beschränkt.The same treatment applies to wool; but becomes appropriate kept the concentration of bleach lower, e.g. B. to about i1 (2 ° / a effective chlorine and 3 °, lo limited permanganate.
Bei der Bleiche von Borsten, einem der Wolle chemisch nahestehenden Stoff, wird nach einem bekannten Verfahren mit einer HOCI-haltigen Hypochloritlösung ohne irgendwelche weiteren Zusätze vorgebleicht, und hierauf erfolgt, ohne Zwischenwäsche nach dem Entfernen der zum großen Teil aufgebrauchten sauren Bleichlauge vom Bleichgut, eine alkalische Superoxydbleiche, sei es mit einer iprozentigen Na20,- Lösung oder mit einer schwach ammoniakalischen H202-Lösung. In dieser Superoxydlösung werden die geringen Reste von HOCl aus der Vorbleiche neutralisiert und mit Na202 umgesetzt unter Sauerstoffabspaltung. Im Gegensatz hierzu handelt es sich bei dem vorliegenden Verfahren um eine dauernd in saurer Lösung verlaufende Hypochloritbleiche, wobei dem Hypochlorit zur Beschleunigung und Verstärkung der Wirkung ein starker Gehalt an Permanganat beigegeben ist.In the bleaching of bristles, one that is chemically related to wool Substance is made according to a known process with a HOCI-containing hypochlorite solution Pre-bleached without any further additives, and then done without intermediate washing after removing the largely used up acidic bleaching liquor from the goods to be bleached, an alkaline superoxide bleach, be it with an ip% Na20 solution or with a weakly ammoniacal H202 solution. Be in this superoxide solution the small residues of HOCl from the pre-bleaching are neutralized and reacted with Na202 with elimination of oxygen. In contrast, this is the case here Process for a hypochlorite bleaching which runs continuously in an acidic solution, whereby to the Hypochlorite to accelerate and intensify the effect high permanganate content is added.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEC37476D DE473869C (en) | 1925-11-20 | 1925-11-20 | Process for bleaching wool and semi-wool |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEC37476D DE473869C (en) | 1925-11-20 | 1925-11-20 | Process for bleaching wool and semi-wool |
Publications (1)
Publication Number | Publication Date |
---|---|
DE473869C true DE473869C (en) | 1929-03-22 |
Family
ID=7022827
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEC37476D Expired DE473869C (en) | 1925-11-20 | 1925-11-20 | Process for bleaching wool and semi-wool |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE473869C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2429082A (en) * | 1943-06-15 | 1947-10-14 | Stevensons Dyers Ltd | Antishrinking treatment of animal fibers |
DE974908C (en) * | 1952-12-23 | 1961-05-31 | Union Des Fabriques Belges De | Process for bleaching polyacrylonitrile fibers |
-
1925
- 1925-11-20 DE DEC37476D patent/DE473869C/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2429082A (en) * | 1943-06-15 | 1947-10-14 | Stevensons Dyers Ltd | Antishrinking treatment of animal fibers |
DE900807C (en) * | 1943-06-15 | 1954-01-04 | Stevensons Dyers Ltd | Process and means for reducing the tendency to shrinkage of fabrics or fibrous materials consisting wholly or partly of wool |
DE974908C (en) * | 1952-12-23 | 1961-05-31 | Union Des Fabriques Belges De | Process for bleaching polyacrylonitrile fibers |
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