NO122333B - - Google Patents
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- NO122333B NO122333B NO15668065A NO15668065A NO122333B NO 122333 B NO122333 B NO 122333B NO 15668065 A NO15668065 A NO 15668065A NO 15668065 A NO15668065 A NO 15668065A NO 122333 B NO122333 B NO 122333B
- Authority
- NO
- Norway
- Prior art keywords
- oxalic acid
- bleaching
- acid
- bath
- fibers
- Prior art date
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- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 54
- 238000004061 bleaching Methods 0.000 claims description 19
- 235000006408 oxalic acid Nutrition 0.000 claims description 18
- 150000003839 salts Chemical class 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 6
- 229920002678 cellulose Polymers 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 4
- 239000001913 cellulose Substances 0.000 claims description 3
- 239000004627 regenerated cellulose Substances 0.000 claims description 3
- 229920002994 synthetic fiber Polymers 0.000 claims description 3
- 239000012209 synthetic fiber Substances 0.000 claims description 3
- 239000002759 woven fabric Substances 0.000 claims description 3
- -1 or yarns Substances 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 239000007844 bleaching agent Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 229920000297 Rayon Polymers 0.000 description 3
- 206010003549 asthenia Diseases 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- OKBMCNHOEMXPTM-UHFFFAOYSA-M potassium peroxymonosulfate Chemical compound [K+].OOS([O-])(=O)=O OKBMCNHOEMXPTM-UHFFFAOYSA-M 0.000 description 3
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical compound [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 description 3
- 229940039790 sodium oxalate Drugs 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000001488 sodium phosphate Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920002955 Art silk Polymers 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 description 1
- 229910000397 disodium phosphate Inorganic materials 0.000 description 1
- 235000019800 disodium phosphate Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 229910000406 trisodium phosphate Inorganic materials 0.000 description 1
- 235000019801 trisodium phosphate Nutrition 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Landscapes
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Description
Blekebad. Bleach bath.
Det er kjent å bleke fibre og tekstiler ved hjelp av vandige oppløsninger av sulfomonopersyre eller dets salter. Eksempel-vis er til dette blitt anvendt oppløsninger av saltet KHS05. Selv om disse forbindel-ser er gode blekemidler på grunn av deres høye oksydasjonspotensialer har deres inn-føring i praksis hittil støtt på vanskelig-heter. Grunnen til dette ligger deri at de nevnte oppløsninger også på grunn av deres lave pH-verdier kan beskadige fi-brene betraktelig. It is known to bleach fibers and textiles using aqueous solutions of sulfomonoperic acid or its salts. For example, solutions of the salt KHS05 have been used for this. Although these compounds are good bleaching agents due to their high oxidation potentials, their introduction in practice has so far encountered difficulties. The reason for this lies in the fact that the mentioned solutions, also due to their low pH values, can damage the fibers considerably.
Ifølge engelsk patent nr. 451 062 be-skrives blekning av ull med vannstoffper-oksydoppløsninger tilsatt små mengder av oksalsyre. Ved fremgangsmåten ifølge dette patent får man en oppløsning som inneholder et peroksydisk blekemiddel som først stabiliseres ved hjelp av tilsetning av visse stoffer hvorav særlig fosforsyre og borsyre fremheves. Denne oppløsning skal da under eller kort før blekingen akti-veres ved tilsetning av ytterligere stoffer som opphever stabiliseringsvirkningen, så-ledes at det finner sted en surstoffavspalt-ning og følgelig en bleking. Til aktivering anvendes bare meget små mengder akti-vatorer som på ingen måte er tilstrekke-lig til å bevirke en fiberskåning. According to English patent no. 451 062, the bleaching of wool is described with hydrogen peroxide solutions to which small amounts of oxalic acid have been added. With the method according to this patent, a solution is obtained which contains a peroxidic bleaching agent which is first stabilized by the addition of certain substances, of which phosphoric acid and boric acid are highlighted in particular. This solution must then be activated during or shortly before the bleaching by the addition of additional substances that cancel the stabilization effect, so that oxygen is released and consequently bleaching takes place. For activation, only very small amounts of activators are used, which are in no way sufficient to cause fiber damage.
Det viste seg at man vidtgående kan forminske eller helt undertrykke disse ulemper ved blekning av fibre av cellulose, regenerert cellulose, celluloseestere eller fullsyntetiske fibre eller derav fremstilte garn, vevede stoffer eller strikkede stoffer, hvis man anvender blekebad som inneholder sulfomonopersyre eller dets salter, og som samtidig inneholder oksalsyre eller dens salter, som natriumoksalat. Fasthets-tapet som finner sted uten denne tilsetning går derved tilbake fra 1/4 til 1/10. Samtidig oppnås en betraktelig stabilisering av det aktive surstoff ved tilsetning av oksalsyre. It turned out that you can greatly reduce or completely suppress these disadvantages when bleaching fibers of cellulose, regenerated cellulose, cellulose esters or fully synthetic fibers or yarns, woven fabrics or knitted fabrics produced from them, if you use a bleaching bath containing sulphomonoperic acid or its salts, and which also contain oxalic acid or its salts, such as sodium oxalate. The loss of firmness that occurs without this addition is thereby reduced from 1/4 to 1/10. At the same time, a considerable stabilization of the active oxygen is achieved by adding oxalic acid.
Oppfinnelsen består altså i et blekebad som inneholder sulfomonopersyre eller dens salter og oksalsyre til behandling av fibre av cellulose, regenerert cellulose, celluloseestere eller fullsyntetiske fibre eller derav fremstilte garn, vevede stoffer eller strikkede stoffer, blekebadet er karakterisert ved at det på 10 deler sulfo-monoper-syre eller dens salter inneholder 0,5—5 deler oksalsyre eller et salt av oksalsyre. Blekningen med denne oppløsning kan uten videre gjennomføres ved høyere temperaturer, f. eks. ved temperaturer fra 60— 100° C. The invention therefore consists in a bleaching bath containing sulfomonoperic acid or its salts and oxalic acid for the treatment of fibers of cellulose, regenerated cellulose, cellulose esters or fully synthetic fibers or yarns, woven fabrics or knitted fabrics produced from them, the bleaching bath is characterized by the fact that 10 parts sulfo- monoperic acid or its salts contain 0.5-5 parts of oxalic acid or a salt of oxalic acid. Bleaching with this solution can easily be carried out at higher temperatures, e.g. at temperatures from 60 to 100° C.
Ifølge kravets fremgangsmåte skal det derfor benyttes 10—100 ganger den mengde oksalsyre som det tidligere har vært van-lig å benytte, og fibrenes rivfasthet synker vesentlig mindre enn ved de tidligere kjente fremgangsmåter. According to the method of the claim, 10-100 times the amount of oxalic acid that has previously been common is to be used, and the tear strength of the fibers decreases significantly less than with the previously known methods.
Eksempel 1: Example 1:
En bomull-poplin-råvare behandles ved 90° C i badforhold 1:40 i 2 timer med et blekebad som pr. liter inneholder 5,0 g KHS05 og 1 g oksalsyre. Badets pH-verdi utgjør' 2,0. A cotton-poplin raw material is treated at 90° C in a bath ratio of 1:40 for 2 hours with a bleaching bath that per liter contains 5.0 g KHSO5 and 1 g oxalic acid. The bath's pH value is 2.0.
Vevningens styrke prøves ved rivefor-søk på varptråden. Før blekningen utgjør varptrådens gjennomsnittsstyrke 419 g, etter blandingen 389 g, hvilket tilsvarer et styrketap på bare 7,2 pst. Behandler man den samme vevning med det samme blekebad, men uten tilsetning av oksalsyre, så utgjør varptrådens styrke etter behandlingen bare 226 g, hvilket tilsvarer et styrketap på 46 pst. The strength of the weave is tested by tearing the warp thread. Before bleaching, the average strength of the warp thread is 419 g, after the mixture 389 g, which corresponds to a strength loss of only 7.2 per cent. If the same fabric is treated with the same bleaching bath, but without the addition of oxalic acid, the strength of the warp thread after the treatment is only 226 g, which corresponds to a strength loss of 46 per cent.
Den ublekede vares hvithetsgrad ut-gjør 52 pst. målt med Zeiss-Opton «El-repho». Den blekede vare har en hvithetsgrad på 75 pst. The degree of whiteness of the unbleached product is 52 per cent measured with Zeiss-Opton "El-repho". The bleached product has a degree of whiteness of 75 per cent.
Badet som ble anvendt til blekning inneholder opprinnelig 0,44 g aktivt surstoff pr. liter. Etter behandlingen utgjør innholdet av aktivt surstoff 0,31 g pr. liter. Ved blekebadet som ikke inneholder oksalsyre synker innholdet av aktivt surstoff til 0,146 g pr. liter. The bath that was used for bleaching originally contained 0.44 g of active oxygen per litres. After treatment, the content of active oxygen amounts to 0.31 g per litres. In the bleach bath that does not contain oxalic acid, the content of active oxygen drops to 0.146 g per litres.
Eksempel 2: Glinsende viskose-rayon av 180 deniers og matt viskose-rayon av 60 deniers behandles i strengorm ved 80° C i 2 timer i et blekebad som pr. liter inneholder 5 g KHS05 og 1 g natriumoksalat. Example 2: Shiny viscose rayon of 180 deniers and matt viscose rayon of 60 deniers are processed in a string worm at 80° C for 2 hours in a bleaching bath which per liter contains 5 g KHSO5 and 1 g sodium oxalate.
De glinsende viskosefibres rivlengde synker bare 5,5 pst., de matte fibres rivlengde bare 6,0 pst. The tear length of the shiny viscose fibers decreases by only 5.5 per cent, the tear length of the matt fibers only 6.0 per cent.
Sammenligningsforsøk med et bad av tilsvarende sammensetning, men uten natriumoksalat, viser at ved ellers like ar-beidsbetingelser så synker rivlengden 33 til 35 pst. av dens opprinnelige verdi. Comparison tests with a bath of similar composition, but without sodium oxalate, show that under otherwise identical working conditions, the tear length decreases by 33 to 35 per cent of its original value.
Eksempel 3. Example 3.
Dyp matte polyamidtråder av 40 deniers ble bleket i 2 timer ved 75° C i et blekebad som pr. liter innholdt 10 g Caro's salt 50 prosentlig Deep matte polyamide threads of 40 deniers were bleached for 2 hours at 75° C in a bleaching bath which per liter contains 10 g Caro's salt 50 percent
(KHSOs) og 0,1 g oksalsyre. pH-verdien utgjorde 1,8, badforholdet 1:25. Trådenes rivlengde var gått tilbake fra opprinnelig 39,0 km til 33,7 km, hvilket tilsvarer et styrketap på 13,6 pst. (KHSOs) and 0.1 g of oxalic acid. The pH value was 1.8, the bath ratio 1:25. The tear length of the wires had decreased from the original 39.0 km to 33.7 km, which corresponds to a strength loss of 13.6 per cent.
Til sammenligning viste material som var bleket under de samme betingelser, imidlertid uten tilsetning av oksalsyre en rivlengde på 28,1 km, hvilket tilsvarer et bleketap på 28,0 pst. In comparison, material that had been bleached under the same conditions, however, without the addition of oxalic acid, showed a tear length of 28.1 km, which corresponds to a bleaching loss of 28.0 percent.
Eksempel 4: Strengmaterialet av Caprolactamets polymere som viste en begynnelsesstyrke på 45 riv-km ble underkastet en blekning ved 90° C. Badet inneholdt i 1 liter bleke-væske 10 g KHSOs (50 pst.-ig) og 1 g oksalsyre. Etter en 2 timers behandling ved et bad på 1:40 utgjorde polyamidkunstsil-kens styrke 40,6 riv-km, hvilket tilsvarer en tilbakegang i rivstyrken på 9,8 pst. Example 4: The strand material of Caprolactamets polymers that showed an initial strength of 45 tear-km was subjected to bleaching at 90° C. The bath contained in 1 liter of bleaching liquid 10 g of KHSOs (50 per cent) and 1 g of oxalic acid. After a 2-hour treatment in a bath of 1:40, the strength of the polyamide artificial silk was 40.6 tear-km, which corresponds to a decrease in the tear strength of 9.8 per cent.
Ved et sammenligningsforsøk utført under analoge betingelser, imidlertid under utelatelse av oksalsyre, kunne det fast-slås en tilbakegang av rivlengden fra 45 til 34,4 km, det er 23,6 pst. In a comparison experiment carried out under analogous conditions, however, with the omission of oxalic acid, it was possible to determine a decrease in the tear length from 45 to 34.4 km, that is 23.6 per cent.
Eksempel 5. Example 5.
38,2 kg strikket vare av caprolactamets polymere ble bleket i 1 time og 20 min. ved 70—75° C i et hespekar som på 1200 liter vann (6° DM) inneholdt: 5 kg Caro's salt 46 pst.-ig (KHSO5) 1 » oksalsyre 38.2 kg of knitted goods of the caprolactam polymers were bleached for 1 hour and 20 minutes. at 70-75° C in a crucible containing 1,200 liters of water (6° DM) containing: 5 kg Caro's salt 46 percent (KHSO5) 1 » oxalic acid
1,5 » trinatriumfosfat 1,5 » dinatriumfosfat. 1.5 » trisodium phosphate 1.5 » disodium phosphate.
Aktivsurstoffet som ble titrert jodo-metrisk sank derved fra 0,19 g til-0,08 g/l, og det ble forbrukt langsomt. pH-verdien utgjorde under blekningen 3,5. The active oxygen that was titrated iodometrically thereby decreased from 0.19 g to 0.08 g/l, and it was consumed slowly. The pH value during the bleaching was 3.5.
Etter behandlingen ble den strikkede After the treatment, it was knitted
vare spylt med vann og tørket. product rinsed with water and dried.
Den blekede vares rivstyrke ble på The bleached product's tear strength remained on
grunn av behandlingen bare 2 pst. mindre. due to the treatment only 2 percent less.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO15668065A NO129016C (en) | 1965-07-16 | 1965-07-16 | ROOM HEATER APPLIED FOR OPTIONAL OPTIONS WITH SOLID OR LIQUID FUEL |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO15668065A NO129016C (en) | 1965-07-16 | 1965-07-16 | ROOM HEATER APPLIED FOR OPTIONAL OPTIONS WITH SOLID OR LIQUID FUEL |
Publications (3)
Publication Number | Publication Date |
---|---|
NO122333B true NO122333B (en) | 1971-06-14 |
NO129016B NO129016B (en) | 1974-02-11 |
NO129016C NO129016C (en) | 1981-02-11 |
Family
ID=19909113
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO15668065A NO129016C (en) | 1965-07-16 | 1965-07-16 | ROOM HEATER APPLIED FOR OPTIONAL OPTIONS WITH SOLID OR LIQUID FUEL |
Country Status (1)
Country | Link |
---|---|
NO (1) | NO129016C (en) |
-
1965
- 1965-07-16 NO NO15668065A patent/NO129016C/en unknown
Also Published As
Publication number | Publication date |
---|---|
NO129016B (en) | 1974-02-11 |
NO129016C (en) | 1981-02-11 |
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