SU66320A1 - Method for producing brown dye from dinitro-naphthalene - Google Patents

Method for producing brown dye from dinitro-naphthalene

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Publication number
SU66320A1
SU66320A1 SU513-45A SU337025A SU66320A1 SU 66320 A1 SU66320 A1 SU 66320A1 SU 337025 A SU337025 A SU 337025A SU 66320 A1 SU66320 A1 SU 66320A1
Authority
SU
USSR - Soviet Union
Prior art keywords
dinitro
naphthalene
brown dye
producing brown
dye
Prior art date
Application number
SU513-45A
Other languages
Russian (ru)
Inventor
Л.Е. Олифсон
Original Assignee
Л.Е. Олифсон
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Л.Е. Олифсон filed Critical Л.Е. Олифсон
Priority to SU513-45A priority Critical patent/SU66320A1/en
Application granted granted Critical
Publication of SU66320A1 publication Critical patent/SU66320A1/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Coloring (AREA)

Description

Известны способы получени  красителей типа нафтазарииа путем взаимодействи  1,5-и 1,8-динитронафталииа с дым идей серной кислотой и серой И получение коричневого сернистого красител  путем сплавлени  неочищенного динитронафталина, представл ющего смесь 1,5- н 1,8 изомеров с полисульфидом натри .Methods are known for the preparation of naphthasarium type dyes by reacting 1,5 and 1,8 dinitronaphthalia with ideas smoke sulfuric acid and sulfur. .

По предлагаемому способу коричневый краситель, пригодный длл крашени  тканей, кожи, изготовлени  чернил и т. п., может быть получен путем взаимодействи  динитронафталина с водным раствором (приблизительно 25%-ным) едкого натра без вс кого участи  серы. Механизм этой реакции еще недостаточно вы снен, но, по-видимому, одно из бензольных  дер динитронафталина под вли нием водного раствора щелочей приобретает хиноидную структуру с образованием оксинитронафтазарина .According to the proposed method, a brown dye suitable for dyeing fabrics, leather, making ink, etc., can be obtained by reacting dinitronaphthalene with an aqueous solution (approximately 25%) of caustic soda without any sulfur. The mechanism of this reaction is still not well understood, but it seems that one of the benzene der dinitronaphthalene, under the influence of an aqueous alkali solution, acquires a quinoid structure with the formation of oxynitronaphthazarin.

Значительное вли ние на процесс образовани  красител  имеет вода.Water has a significant effect on the dye formation process.

Пример. В чугунный или эмалированный котел помещают 10 г технического динитронафталина и нагревают его до плавлени  (температура плавлени  145-155). Одновременно в другом котелке нагревают раствор щелочи (2,5 кг едкого натра и 10 л воды) до 70 - 80°.Example. 10 g of technical dinitronaphthalene are placed in a cast-iron or enamelled boiler and heated to melting (melting point 145-155). At the same time, in another pot, the alkali solution (2.5 kg of caustic soda and 10 liters of water) is heated to 70 - 80 °.

Подогретый раствор щелочи отдельны.ми порци ми при посто нном перемешивании приливают к расплавленному Динитронафталину. Полученную смесь осторожно нагревают при посто нном помещивании. В случае загустевани  массы небольшими порци ми приливают гор чую воду. Нагревание производ т до по влени  запаха аммиака, затемThe heated alkali solution is poured in separate portions with constant stirring to the molten Dinitronaphthalene. The resulting mixture is gently heated with constant placement. In the case of mass thickening, hot water is added in small portions. Heating is performed until the appearance of the smell of ammonia, then

№ 66320No. 66320

нагревание прекращают и реакци  продолжаетс  сама собой с выдеоТением большого количества тепла, в результате чего вода испар етс  постепенпо и масса загустевает.the heating is stopped and the reaction continues on its own with the release of a large amount of heat, as a result of which the water evaporates gradually and the mass thickens.

Дл  того, чтобы не дать полученной массе затвердеть в котле, последнюю в виде пасты раскладывают на листе жести, где она затвердевает , превраща сь в твердые куски красител .In order to prevent the resulting mass from hardening in the boiler, the latter, in the form of a paste, is laid out on a sheet of tin, where it hardens, turning into solid dye pieces.

Полученный краситель измельчают в порошок на шаровой мельпи це.The resulting dye is ground to a ball on a ball.

Пред м е т и з о б р е т е и и  PREPARATION AND RESULTS

Способ получени  коричневого красител  из динитронафталина, отличающийс  тем, что динитронафталин обрабатывают при нагревании и перемешивании приблизительпо 25 о-ным водным раствором едкого натра.A method for producing a brown dye from dinitronaphthalene, characterized in that dinitronaphthalene is treated by heating and stirring with an approximately 25% aqueous sodium hydroxide solution.

SU513-45A 1945-02-27 1945-02-27 Method for producing brown dye from dinitro-naphthalene SU66320A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU513-45A SU66320A1 (en) 1945-02-27 1945-02-27 Method for producing brown dye from dinitro-naphthalene

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU513-45A SU66320A1 (en) 1945-02-27 1945-02-27 Method for producing brown dye from dinitro-naphthalene

Publications (1)

Publication Number Publication Date
SU66320A1 true SU66320A1 (en) 1945-11-30

Family

ID=51358268

Family Applications (1)

Application Number Title Priority Date Filing Date
SU513-45A SU66320A1 (en) 1945-02-27 1945-02-27 Method for producing brown dye from dinitro-naphthalene

Country Status (1)

Country Link
SU (1) SU66320A1 (en)

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