USRE9987E - Heinrich baum - Google Patents

Description

UNITED STATES HEINRICH BAUNI, OF HOC-IIS'DOXTLIE-MAIX,

PATENT OFFIQE.

GERMANY, AS SlG-NOR, 13 Y.

BRUNING, OF SAME PLACE.

COLORING-MATTER OR DYE-STUFF.

SPECIFICATION formingpart of Reissued Letters Patent No. 9,987, dated December 27, 1881. Original No. 210,233, dated November 26, 1575. Application for reissue filed November 4, 1881.

DIVISION B.

To all UIIONZ it may concern:

Be it known that I, HEINRICH BAUM, a subject of the Emperor of Germany, residing at Hiichst-on-the-Main, Germany, have invented certain new and useful Improvements in Dye- Stnfis or Coloring-Matters, of which the follow. ing is a specification.

This invention consists in a yellowish-red scarlet coloring matter produced by the action of bisnlphohetanaphtholic sodium salt soluble in alcohol, on the diazoic derivative of Kylidine.

- In carrying out my invention I first produce the bisulphohetanaphtholic acids by mixing one part of hetanaphthol with three parts of sulphuric acid of 1.848 specific gravity, and heatingthc mixture for twelve hours at a temperature of 212 to 230 Fahrenheit. Two isomeric hisulphobctanaphtholic acids are thereby obtained, the soda salts of which are easily separated from each other by beingdigested wit-h three or four parts of alcohol, the salt that is insoluble in alcohol being filtered and dried, while the soluble salt is extracted hyevaporation and dried.

To obtain my new yellowish-red scarlet coloring-matter, I take six and one-half parts, by weight, of X5 lidine, dissolve the same in twelve parts of inuriatic acid of 1.16 to 1.18 specific gravity, and one hundred parts of water, to which are added four and ope-half parts of pure nitrite of potash. I then take twenty parts, by weight, of the above-described soda salt of the bisulphobetanaphtholic acid, soluble in alcohol, dissolve the sameiin two hundred parts of water and ten parts of ammonia of ten per cent., and mix this solution with the above-described solution of xylidiue, when the coloring-matter is precipitated in the Form of paste. The latter is dissolved in water, the coloring-matter precipitated with salt, and

dried. A dry powder is thereby obtained,

which has a yellowish-red color, and which dyes wool and silk with a yellowish-red scarlet.

My coloring-m atter is freely soluble in water, and by adding permanganate of potash to its aqueous solution the coloringmatter is precipita-ted. It dissolves in sulphuric acid with a yellowish-red color and in nitric acid with a yellow color. It is difticultly soluble in alcohol, with ayellow-searletcolor. Brominewater added to its aqueous solution produces a precipitate of a white color, which disappears by addition of an excess of bromine-water.

What I claim as new, and desire to secure by Letters Patent, is-

1. As a new article of manufacture, theyel lowishred scarletcoloriiig-nnitter having the characteristics above described.

2. The within-described process for produc ing a dye-stuti'or coloring-matter by the action of the sodium salt of bisulphobetanaphtholie acid soluble in alcohol, on the diazoic derivative of Xylidine, substantially as set forth.

In testimony whereof I have hereunto set my hand this 4th day of October, 1881.

HEINRICH BAUM. W itnesses:

ALVESTO S. HUGUE,

Go'rtrua. RADERMACHER.