USRE13122E - of eiberpeld - Google Patents

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Publication number
USRE13122E
USRE13122E US RE13122 E USRE13122 E US RE13122E
Authority
US
United States
Prior art keywords
acid
new
reddish
violet
sulfonic acid
Prior art date
Application number
Inventor
Oscar Gxnther
Original Assignee
Farbenfabriken Vorm
Filing date
Publication date

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  • Our invention relates to the manufacture and production of new coloring matters ca-- pable of dyeing wool.
  • The. new dyestuffs are obtained by COIIlbining in acid solution the diazo compound of para111tl5llllllll-OfiillO-SlllfOIllC acid wlth naphthalene compounds having the formula:
  • nan 2 CMH (8) (it meaning hydrogen or a. substitncnt, and Y meaning hydrogen or
  • Y meaning hydrogen or
  • the new dyestufi's are after being dried and pulverized in the shape of their alkaline salts dark powders soluble in water generally with a red to violet color. They yield upon reduction with stannous chlorid and sulfonic acid and naphthalene dianiins having the general formula:
  • Dyestufl' obtained from ara-nitranilin- 7 c tho-sulfonic acid. or D5 Reddish-hluc. Reddish-riolet. Bluish-violet.

Description

. hydrochloric acid para-phenylenediamin group).
oscAn. GU'NTHER A1\TD LEOPOLD HESSE, or ELBERFELD, GERMANY, ASSIGNORS To FABBENFABRIKENl VORM. FBIEDR. BAYER &
CORPORATION OF. GERMANY.
C0.,;OF ELBERFELD, GERMANY, ,A.
AZO DYE.
Specification of Reissued Letters Patent. Reissued J 11116 14 1910.
No Drawing. Original No. 921,239,dated May 11, 1909, Serial No. 477,284. Application for reissue filed December 10, 1909.
at Elberfeld, Germany, Kingdomof Prus sia, have invented new and useful Improvements in New Azo Dyes, of which the following is a specification. I
Our invention relates to the manufacture and production of new coloring matters ca-- pable of dyeing wool.
The. new dyestuffs are obtained by COIIlbining in acid solution the diazo compound of para111tl5llllllll-OfiillO-SlllfOIllC acid wlth naphthalene compounds having the formula:
. nan 2 CMH (8) (it meaning hydrogen or a. substitncnt, and Y meaning hydrogen or The new products possess the valuable roperty that they roduce on wool pure violetto black shades ast to light and to washing and possessing excellent level-dyeing properties.
The new dyestufi's are after being dried and pulverized in the shape of their alkaline salts dark powders soluble in water generally with a red to violet color. They yield upon reduction with stannous chlorid and sulfonic acid and naphthalene dianiins having the general formula:
ldiazotized by means of 69 parts of sodium nitrite and 550 parts of a 20 per cent; hydrochloric acid, the diazo compound is introduced into a suspension of 239 parts of 2 .8- aminonaphthol 6 sulfonic acid showing slight-1y acid reaction. The dyestufi is prea sulfonic Serial No. 532,507.
cipitated by the addition of common. salt,
filtered ofi'anddried. It is in the shape of its sodium salt areddish-brown powder soluble in water with a reddish-violet color and soluble in concentrated sulfuric acid with an orange'color, The new dye yields upon reduction with stannous chlorid and hydrochloric acid para-phenylene-dianiiiusulfonic acid and 1.Q-diamino8-naphthol-(i-sulfonic acid. It dies wool reddish-violetshades fast to light and to washing. j
- -It dyes wool reddish-violet shades fast to light and to washing.
In the following table the shades of some of. the new dyes are given;
Dyestufl' obtained from ara-nitranilin- 7 c tho-sulfonic acid. or D5 Reddish-hluc. Reddish-riolet. Bluish-violet.
Parana yl-2-innino-S-naphthol-lS-sullonic i acid Grcou ulack.
2.8-amiuonuphthol-3.6disulfouic acid Violet l Having now described our invention and in what manner the same is to be performed,
what we claim as new and desire tosecurc by Letters Patent is:
1. The herein-describcd new azo dyestuffs, obtainable from para-nitranilin-ortho-sulfouio acid and naphthalene compounds of-the above-given formula in acid solution, which dyestuffs are, after being dried and pulverized in the shape of their alkaline salts dark powders soluble in water generally with a red to violet color; yield ing upon reduction with starinous chlorid and hydrochloric. acid para-phenylenedi amin-sulfonic acid and diamin'o-naphthols having the above-given formula; and dyeing wool from violet to black shades, substantiallyas described, v
2. The herein-described new azo dyestuif, obtainable from para-nitranilin-ortho snh fonio acid and 2.8 amino-naphthol-G-sulfonic acid in acid solution, which "dyestufl' is, after being dried and pulverized in the shape of its sodium salt a reddish-brown -poWder solublein water with a. reddish.-
violet color and soluble in.concentrated sul-- .furi c acid with an orange color; yielding.
upoiii'gt iuqtion with sizannoiisiaifibr id and wt' qur hands in tha 0f two subhydrochloriacid parahen lenediamin- SCIlblIlg witnesses,
sulfonic acid and 1.2-diam1n0- -naphth 01-6- I OSCAR GUNTHEB. L. '15.] sulfonic acid; and dyeing wool reddish LEQPOLD mSSE. L. 8.1 v 'sviolet shades fast to llght' and to washing, Witnesses:
substantially as described.v v 7 0m Kiime,
In testimony whereof we have hereunto Cms. J. WRIGHT.

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