DE331484C - Process for the use of cleavage products of the protein bodies - Google Patents

Description

Process * for the use of decomposition products of the protein bodies. According to patent 330133 , acids such as protalbinic and lysalbic acid and the like, or their salts, formed from protein bodies by hydrolytic cleavage with caustic alkalis or similar substances by treatment in the heat, or their salts, have their own properties when added to dye baths , except - to deliver vat dyes, more even and deeper colors and to improve the effect of the baths and approaches on the fiber in general.

Something similar is now also true of vegetable dyes when dyeing the vat dyes Fibers the case.

The pressure tests undertaken by Dr. Ludwig Lichterstein with hydron blue and bromine indigo gave particularly effective results in protalbinic acid soda. The idea of looking for similar cheaper products of this type for the same purpose evidently did not occur to him, for he expressly remarks on the use of sodium protalbinate: "Its price speaks against its technical use". (Lehnes Färberzeitung 1913, page 22, left, line 7 from the bottom.) Following these investigations by Lichterstein, Dr. -Robert for 11e r dyeing experiments with the hydron blue vat in the same way with and without the addition of sodium protalbinate; however, it did not get any favorable results in staining. Rather, in contrast to the usual vat, it achieved the "leanest" results with the vat mixed with sodium protalbinate (Lehnes Färberzeitung 1914, page 28, left, line to from below).

It has been found that instead of the typical protalbic or lysalbic acids Salts, the high price of which a technical use compared to that of L i c h t e n s t e i n the result obtained with his printing tests is not favorable, the corresponding acids from cheaper proteins, e.g. B: from casein, rice or wheat gluten, as well as that @es are not necessary here either, the resulting. To separate acid mixtures or to clean them particularly carefully, but that a cleaning with calcium or 1VIagnesiumhydroxyd also for the use these products for vat dyes is sufficient.

But it was particularly found that the addition of proteins by hydrelytische cleavage by means of caustic alkalis or similar: active substances Acids such as protalbic and lysalbic acid formed by treatment in the heat and the like, or their salts to vats not only in strongly alkaline, but also in weakly alkaline, neutral and more or less weakly acidic vats vegetable Dyeing fibers permitted. The remark H a 11 e r s that a »lean coloring is not confirmed.

The following examples are intended to explain the way in which the vats are to be set up and operated = dyeing riiit "weakly acidic indigo vat. Qo Parts of Indigo MLB vat, 60 percent, are distributed in a little warm water and completely vat with a little hydrosulphite iao parts of casein product are dissolved in a little warm water and then diluted to such an extent that each contains 1 dye liquor of casein product 50 stained for 25 to 30 minutes.

Manufacture of casein product. The cesein product is obtained through Treat for a few hours on the water bath of iöö eTeileri C'äsein ,, - Calculated free of ash and anhydrous, it rides 1.5 parts of sodium hydrate and 50 parts of water: After the cleavage has ended, the solution is treated with calcium or magnesium hydro2cyd cleaned and neutralized in the cold with formic acid against phenolphthalein and evaporated to dryness in vacuo.

Claims (1)

PATENT CLAIM: Further development of the use of cleavage products of protein bodies, such as protalbic and lysalbic acid and the like, or their salts according to Patent 330133 in purified or unpurified form, with the exception of the use of protalbic and lysalbic acid or their salts themselves separated from each other and in strongly alkaline vats for dyeing vegetable fibers with vat dyes in weakly alkaline, neutral or more or less weakly acidic vats.