AT211779B - Process for the acidic peroxide bleaching of textile fibers - Google Patents
Process for the acidic peroxide bleaching of textile fibersInfo
- Publication number
- AT211779B AT211779B AT764257A AT764257A AT211779B AT 211779 B AT211779 B AT 211779B AT 764257 A AT764257 A AT 764257A AT 764257 A AT764257 A AT 764257A AT 211779 B AT211779 B AT 211779B
- Authority
- AT
- Austria
- Prior art keywords
- textile fibers
- peroxide bleaching
- acidic peroxide
- bleaching
- acidic
- Prior art date
Links
- 238000004061 bleaching Methods 0.000 title claims description 6
- 238000000034 method Methods 0.000 title claims description 6
- 239000000835 fiber Substances 0.000 title claims description 5
- 230000002378 acidificating effect Effects 0.000 title claims description 4
- 150000002978 peroxides Chemical class 0.000 title claims description 4
- 239000004753 textile Substances 0.000 title claims description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 6
- 229910021529 ammonia Inorganic materials 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 claims description 3
- 150000003863 ammonium salts Chemical class 0.000 claims description 2
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 6
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000004965 peroxy acids Chemical class 0.000 description 2
- 239000012286 potassium permanganate Substances 0.000 description 2
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 239000004133 Sodium thiosulphate Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 239000004627 regenerated cellulose Substances 0.000 description 1
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 description 1
- 229940048086 sodium pyrophosphate Drugs 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Chemical Or Physical Treatment Of Fibers (AREA)
Description
<Desc/Clms Page number 1>
Verfahren zur sauren Peroxydbleiche von Textilfasern
Das Stammpatent Nr. 203454 betrifft ein Verfahren zur sauren Peroxydbleiche von Textilfasern, wie nativen oder regenerierten Cellulosefasern, Proteinfasern, synthetischen Fasern u. dgl. und besteht darin, dass die zu bleichenden Materialien mit einer auf ein von 3 bis 6, vorzugsweise 4, 5 - 5, 5 eingestellten Lösung behandelt werden, die WasserstoffperoxyS, Essigsäureanhydrid oder Essigsäure und ein Agens enthält, welches das für den Bleichvorgang günstige lonengleichgewicht einstellt. Durch die Titration mit Kaliumpermanganat und darauf folgend durch Zusatz von Kaliumjodid und Titration mit Natriumthiosulfatlösung kann man das Verhältnis des noch im Bad verbleibenden Restes von Wasserstoffperoxyd zu den gebildeten Persäuren feststellen.
Es hat sich als günstig erwiesen, dieses Verhältnis möglichst weit zugunsten der gebildeten Persäure zu verschieben. Das Stammpatent nennt bereits eine Reihe von Stoffen, durch welche dieses Ionengleichgewicht in dem oben genannten Sinn günstig beeinflusst wird. Es wurde nun gefunden, dass durch Zusatz von Ammoniak oder substituierten Ammoniumbasen eine besonders günstige Verschiebung des Ionengleichgewichtes bewirkt werden kann. Diese Verschiebung kann gemäss vorliegender Erfindungso weit getrieben werden, dass in der Lösung mit Kaliumpermanganat praktisch kein Wasserstoffperoxyd mehr nachzuweisen ist. Sorgt man dafür, dass der PH-Wert 5,5 in der fertigen Mischung nicht übersteigt, so treten praktisch keine Verluste an elementarem Sauerstoff auf.
Beispiel : In 1000 l Wasser werden 0, 72 kg Wasserstoffperoxyd, 2,2 kg Essigsäureanhydrid und 0,5 kg Ammoniak gelöst und der Lösung zweckmässig noch 0,23 kg Natriumpyrophosphat zugesetzt. Der p-Wert der Lösung soll 5,5 nicht überschreiten. Das zu bleichende Material wird mit dieser Lösung bei einer Temperatur von 70 bis 950 C ein bis zwei Stunden behandelt.
EMI1.1
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Process for the acidic peroxide bleaching of textile fibers
The parent patent no. 203454 relates to a process for acidic peroxide bleaching of textile fibers, such as native or regenerated cellulose fibers, protein fibers, synthetic fibers and the like. Like. And consists in that the materials to be bleached are treated with a solution adjusted to 3 to 6, preferably 4, 5 - 5, 5, which contains hydrogen peroxyS, acetic anhydride or acetic acid and an agent which is favorable for the bleaching process sets ion balance. By titrating with potassium permanganate and then adding potassium iodide and titrating with sodium thiosulphate solution, the ratio of the residue of hydrogen peroxide still remaining in the bath to the peracids formed can be determined.
It has proven to be beneficial to shift this ratio as far as possible in favor of the peracid formed. The parent patent already names a number of substances by which this ionic balance is favorably influenced in the above-mentioned sense. It has now been found that the addition of ammonia or substituted ammonium bases can bring about a particularly favorable shift in the ion equilibrium. According to the present invention, this shift can be carried to such an extent that practically no more hydrogen peroxide can be detected in the solution with potassium permanganate. If you ensure that the pH value does not exceed 5.5 in the finished mixture, there is practically no loss of elemental oxygen.
Example: 0.72 kg of hydrogen peroxide, 2.2 kg of acetic anhydride and 0.5 kg of ammonia are dissolved in 1000 l of water, and 0.23 kg of sodium pyrophosphate are added to the solution. The p-value of the solution should not exceed 5.5. The material to be bleached is treated with this solution at a temperature of 70 to 950 C for one to two hours.
EMI1.1
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT764257A AT211779B (en) | 1956-06-15 | 1957-11-25 | Process for the acidic peroxide bleaching of textile fibers |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT1176059X | 1956-06-15 | ||
| AT764257A AT211779B (en) | 1956-06-15 | 1957-11-25 | Process for the acidic peroxide bleaching of textile fibers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT211779B true AT211779B (en) | 1960-11-10 |
Family
ID=25604005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT764257A AT211779B (en) | 1956-06-15 | 1957-11-25 | Process for the acidic peroxide bleaching of textile fibers |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT211779B (en) |
-
1957
- 1957-11-25 AT AT764257A patent/AT211779B/en active
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