DE127375C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

GREAT

There has been no lack of attempts to use the centuries-old process of dyeing Turkish red, its execution is tedious mainly due to the cumbersome pickling process and is costly to improve, respectively. to simplify.

From these experiments, a process has emerged which - under the term Neuroth procedure - is used today in general.

In this process, the cotton is first boiled with Turkish red oil (ricinus oil sulfosate of soda) thoroughly impregnated (for rich nuances a repetition of this operation is indicated), at approx 60 to 70 ° well dried and then in. The stain: acetic acid or basic sulfuric acid Brought clay.

After drying again, chalk is used for complete fixation the stain treated and rinsed; only then can the dyeing process begin will. The latter can be done in a boiling bath; however, to achieve vivid nuances it is necessary to to let the dye soak up at about 65 ° and through a steaming process below 1 to 2 atm. Pressure to develop. At the end, the colorations are finished off, fined, i.e. H. by boiling with a soap solution (usually under pressure) of superficially adhering dye and frees impurities.

If the procedure described above is also a significant simplification compared to the much more cumbersome so-called Altroth method, which was used earlier it is still quite complicated and is caused by the frequent drying lengthy and costly.

We have now found a method which, by applying a peculiar compound oil bath and a strongly acidic stain is characterized by the Oil bath by boiling castor oil, caustic soda in an aqueous solution, tin acid soda, Thonerdenatron (sodium aluminate) and phosphate of soda is represented.

Using this bath eliminates the following:

ι. the steam process for the development respectively. Fixation of the dye on the fiber,

2. The drying process both after pickling and dyeing, and finally

3. The chalking, which is indispensable in the Neuroth procedure for the complete fixation of the stain.

This makes the dyeing operation much simpler, shorter, and cheaper, without that colorations achieved in terms of beauty and intensity.

We explain the new procedure in the following

Example,

whose information is in 100 pounds English (45.0 kg) cotton thread.

i. Boil out.

. The yarn is in the usual way under pressure with 1 kg of calcined soda alone or in addition.

together with Y ₂ kg water glass solution of 40 ⁰ B. boiled for 2 hours, washed and spun off.

To make a castor oil soap, do the following:

14 kg of caustic soda, 25 kg of caustic soda (tin soda), 15 kg of alumina soda (sodium aluminate, commercially available), 10 kg of phosphoric acid soda are dissolved in 200 liters of boiling water, then 100 kg of castor oil are added and cooked until the oil is completely saponified. The whole is now brought to 850 liters by adding water; the oil solution should show 9 ⁰ B.

The oiling is done either in the terrine or in a passier machine; It is advisable to always treat 2 pounds of cotton together at the same time, namely in 6 liters of oil solution and 2 liters of water (as free of lime as possible); ¹ J ₂ 1 oil solution is added for every 2 pounds of English yarn. After passing it again, the yarn is knocked out well and dried at 60 to 70 °.

The proportions of the individual quantities given above for the representation of the Turkish red oil bath The components used can be modified within wide limits however, the best results based on previous experience.

3. Pickling.

The stain is produced in the following way:

40 kg of sulfuric acid alumina are dissolved in 240 l of boiling water and the clear solution is drawn off; the same should show about 12 ⁰ B. Immediately before use, 6.4 kg of salmiak, 5.2 kg of magnesia sulfuric acid (Epsom salt), dissolved in 120 liters of boiling water, are added.

The stain should be η ° Β. demonstrate. The yarns are treated in batches of 2 pounds English on terrines or passermaking machines at 35 to 40 °; English for each additional 2 pounds are employed _^3/4 1 stain. After passing it once, the yarns are washed out thoroughly until the washing water no longer reacts acidic.

The proportions of the individual components can also be changed in this stain will; What is essential is that, in contrast to the usual pickling, it is strongly acidic is; the addition of magnesia sulfuric acid is not absolutely necessary for success of the process, but causes more uniform colorations to be achieved.

4. Ausfärberi:

The stained yarns are dyed without drying. The dye liquor is ordered with 8 to 10 pCt. Alizarin 20 pCt., 1 to 1.5 pCt. (depending on the hardness of the water) acetic acid lime solid (dissolved in water), goes with the yarn and is cold for _{4 hours.} Then it drives _^3/4 hour to the boil and cook to r 1Y ₂ hours; at the end it is washed well.

5. Finishing.

The finishing can be carried out either in open runners or in closed apparatus under pressure. Boil the water with 2 and 4 kg calcinirter Soda 1 to 1000 (depending on the hardness of the W ater ⁷⁾ and draws off the resulting foam. Now you add an emulsion of 5 kg of tournant oil, 2.5 kg of soap, ι kg of potato starch (soap and potato starch each dissolved in hot water, then the tournant oil is added), goes in with the yarn and avivirt ι to ι Y ₂ Hours (if pressure equipment is available, at 1 atm.).

The finished yarn is washed well and dried.

Claims (1)

Patent claim:
Process for the Turkish red dyeing of cotton or other vegetable fibers with alizarin and similar mordant dyes, consisting in oiling the goods with a solution made by boiling castor oil, caustic soda, caustic soda, sodium hydroxide and sodium phosphate, then drying them with a strongly acidic mordant Sulfuric alumina and salmiac, expediently treated with the addition of sulfuric magnesia, and, without lately drying, colored in a boiling bath with alizarin or similar stain dyes, and washed, cleaned and finished in the usual way without steaming.