PL45016B1 - - Google Patents

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Publication number
PL45016B1
PL45016B1 PL45016A PL4501659A PL45016B1 PL 45016 B1 PL45016 B1 PL 45016B1 PL 45016 A PL45016 A PL 45016A PL 4501659 A PL4501659 A PL 4501659A PL 45016 B1 PL45016 B1 PL 45016B1
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PL
Poland
Prior art keywords
acid
dye
water
cobalt
aminophenol
Prior art date
Application number
PL45016A
Other languages
Polish (pl)
Filing date
Publication date
Application filed filed Critical
Publication of PL45016B1 publication Critical patent/PL45016B1/pl

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Description

Znane jest otrzymywanie barwników mono- azowych przez sprzeganie dwuazowanego 5-ni- tro-2-aminofenolu z 2-naftylamina w tempera¬ turze pokojowej albo z kwasem 2-naftylami- nosulfonowym (—1) w temperaturze 50°C w obecnosci kwasu naftalensulfonowego —1 w osrodku zakwaszonym kwasem octowym lub mineralnym, które za pomoca srodków oddaja¬ cych kobalt daja sie przeprowadzic w organi¬ cznych rozpuszczalnikach, albo wodzie w kom¬ pleksy z metalami w stosunku 2:1. Te kom¬ pleksowe barwniki zawierajace metal w sto¬ sunku 2 :1 sa rozpuszczalne w wodzie i zna¬ ne sa jako barwniki do welny ciagnace w ka¬ pieli obojetnej.Stwierdzono, ze mozna otrzymac barwnik lakowy praktycznie nierozpuszczalny w wo- *) Wlasciciel patentu oswiadczyl, ze wspólr twórcami wynalazku sa: Essbach, dr Kohler i inz. Ducke. dzie jesli 5-nitro-2-aminofenol sprzega sie z kwasem 2-naftyloaminosulfonowym (—1) w srodowisku silnie zakwaszonym kwasem mi¬ neralnym i nastepnie dziala na wyodrebniony barwnik monoazowy w sposób znany zwiazkami kobaltu. Otrzymuje sie barwnik monoazowy, praktycznie nieropuszczalny w wodzie, który rozpuszcza sie dobrze w róznych organicznych rozpuszczalnikach. Barwnik ten moze znalezc wielostronne zastosowanie jako barwnik do przeswiecajacych laków odznaczajacy sie du¬ za trwaloscia na swiatlo.Przyklad 14.4 g 5-nitro-2-aminofenolu 100 %-owego miesza sie w 600 ml wody z 60 g 1-naftalenosulfonianu sodowego w ciagu 90 minut w temperaturze pokojowej* Nastepnie dodaje sie 70 ml kwasu solnego o gestosci 20° Be i dwuazuje w ciagu 20 minut w tem¬ peraturze 15°C (dodatek lodu) dodajac 24.46 °/o-owy roztwór azotynu w ilosci 1/10 roztworu dwuazowaaegOy no czym traktowany roztwórmiesza sie jeszcze godzine. Do 600 ml wody do¬ daje sie 23 g kwasu 2-naftylaminosulfonowe- go (—1) (kwas Tobiasa) co stanowi 0.1 mola + 5°/o i miesza przez noc. Nastepnie doprowa¬ dza sie temperature do 50°C i dwuazuje jeszcze w ciagu 10—15 minut, po czym miesza sie przez 24 godziny, az do zakonczenia sprzega¬ nia utrzymujac stale temperature 50°C. Papie¬ rek Kongo wykazuje niebieska barwe. Osad odsacza sie i wyciska, przemywa 400 ml roz¬ tworu soli kuchennej o gestosci 6° Be. Otrzy¬ many placek miesza sie przez 2 godziny z 1000 ml wody, nastepnie ogrzewa sie do tem¬ peratury 80—85°C i dodaje do roztworu barwni ka 40 ml lugu sodowego 28.8 °/o-owego. Do te¬ go roztworu wlewa sie szybko roztwór 14 g siarczanu kobaltu w 50 ml wody ogrzany do 85°C i miesza w ciagu 30 minut utrzymujac temperature 85°C. Nastepnie zobojetnia sie za pomoca okolo 10 ml kwasu octowego lodowa¬ tego, po czym odsacza sie, przemywa mala iloscia wody i suszy. PLIt is known to prepare monoazo dyes by combining diazotized 5-nitro-2-aminophenol with 2-naphthylamine at room temperature or with 2-naphthylaminesulfonic acid (-1) at 50 ° C in the presence of naphthalensulfonic acid - 1 in a medium acidified with acetic or mineral acid, which can be converted in organic solvents or water into complexes with metals in a ratio of 2: 1 by means of cobalt-releasing agents. These complex dyes containing 2: 1 metal are soluble in water and are known as wool dyes dragging in neutral baths. It has been found that a wax dye that is practically insoluble in water can be obtained *) Patent owner stated that the co-inventors of the invention are: Essbach, Dr. Kohler and Ing. Ducke. day if 5-nitro-2-aminophenol is combined with 2-naphthylaminosulfonic acid (-1) in a highly acidified environment with mineral acid and then acts on the isolated monoazo dye in a manner known by cobalt compounds. A monoazo dye is obtained, practically insoluble in water, which dissolves well in various organic solvents. This dye can be used in many ways as a dye for translucent lakes, characterized by high stability to light. Example 14.4 g of 100% 5-nitro-2-aminophenol are mixed in 600 ml of water with 60 g of sodium 1-naphthalenesulfonate for 90 minutes at room temperature * Then 70 ml of 20 ° B hydrochloric acid are added and diazotized for 20 minutes at 15 ° C (addition of ice) by adding 24.46% nitrite solution to 1/10 of the diazo solution then the treated solution is stirred for another hour. To 600 ml of water, 23 g of 2-naphthylaminosulfonic acid (-1) (Tobias' acid) are added, equal to 0.1 mol + 5%, and stirred overnight. The temperature is then brought to 50 ° C and diazotized for a further 10-15 minutes, followed by stirring for 24 hours, maintaining a constant temperature of 50 ° C until completion of the performance. Congo paper shows a blue color. The precipitate is filtered off and squeezed out, washed with 400 ml of a 6 ° B common salt solution. The resulting cake is mixed with 1000 ml of water for 2 hours, then heated to 80-85 ° C and 40 ml of 28.8% sodium liquor are added to the dye solution. A solution of 14 g of cobalt sulfate in 50 ml of water, heated to 85 ° C, is quickly poured into this solution and stirred for 30 minutes, maintaining the temperature at 85 ° C. It is then neutralized with about 10 ml of glacial acetic acid, then drained, washed with a little water and dried. PL

Claims (2)

Zastrzezenie patentowe 1. Sposób wytwarzanie czarnego barwnika lako¬ wego zawierajacego kobalt przez sprzeganie dwuazowego 5-nitro-2-aminofenolu z kwasemClaim 1. Process for the preparation of cobalt-containing black lacquer dye by combining diazo 5-nitro-2-aminophenol with acid 2. -naftylaminosulfonowym —(1) w tempera¬ turze 50°C w srodowisku zakwaszonym kwa¬ sem mineralnym, znamienny tym, ze sprze¬ ganie prowadzi sie w srodowisku silnie zakwa¬ szonym, wyodrebnia utworzony barwnik i zna¬ nym sposobem traktuje zwiazkami kobaltu. VEB Farbenfabrik Wolfen Zastepca: dr Andrzej Au, rzecznik patentowy F/W.H. w*6r je PL2.-naphthylaminosulfonic acid - (1) at a temperature of 50 ° C in an acidified mineral acid environment, characterized in that the coupling is carried out in a strongly acidic environment, isolates the dye formed and treats it with cobalt compounds in a conventional manner . VEB Farbenfabrik Wolfen Zastepca: Dr. Andrzej Au, patent attorney F / W.H. in * 6r them PL
PL45016A 1959-07-18 PL45016B1 (en)

Publications (1)

Publication Number Publication Date
PL45016B1 true PL45016B1 (en) 1961-08-15

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