SU75922A1 - The method of obtaining aromatic amines containing hydroxyl and carboxyl groups - Google Patents

The method of obtaining aromatic amines containing hydroxyl and carboxyl groups

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Publication number
SU75922A1
SU75922A1 SU380993A SU380993A SU75922A1 SU 75922 A1 SU75922 A1 SU 75922A1 SU 380993 A SU380993 A SU 380993A SU 380993 A SU380993 A SU 380993A SU 75922 A1 SU75922 A1 SU 75922A1
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SU
USSR - Soviet Union
Prior art keywords
carboxyl groups
aromatic amines
containing hydroxyl
amines containing
obtaining aromatic
Prior art date
Application number
SU380993A
Other languages
Russian (ru)
Inventor
Л.Б. Гурвич
М.О. Иодко
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 filed Critical
Priority to SU380993A priority Critical patent/SU75922A1/en
Application granted granted Critical
Publication of SU75922A1 publication Critical patent/SU75922A1/en

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Description

Восстановление нитропроизводпых салициловой кислоты в соответствующие амины производитс  обыкновенно сернистыми щелочами. При восстановлении тех же нитропродуктов чугунными опилками получают низкие выходы аминов, обусловленные образованием комплексных соединений, получаемых продуктов с железом, которые трудно раствор ютс  и разлагаютс .The reduction of nitro-producing salicylic acid to the corresponding amines is usually carried out by sulphurous alkalis. When the same nitroproducts are reduced by cast iron sawdust, low yields of amines are obtained, due to the formation of complex compounds of iron products, which are difficult to dissolve and decompose.

По описываемому способу дл  восстановлени  нитропроизводных салициловой кислоты берут чугунные опилкн, а с целью разложени  образующихс  комплексных соединений аминов с железом, примен ют щелочь.In the described method, cast iron sawdust is taken to reduce nitro derivatives of salicylic acid, and alkali is used to decompose the resulting amine-iron complex compounds.

В котелок загружают 50 мл воды, 13 г чугунных опилок и сол ную кислоту; смесь кип т т 15-20 мин до исчезновени  кислой реакции на конго. Затем в течение 4 час приливают из капельной воронки нагретый до 50° раствора 4-нитробепзол-3-амино-5-сульфосалициловой кислоты в количестве 220 г, содержащей 0,1 г мол  нитропродукта. По мере исчезновени  реакции на ионы железа добавл ют необходимое количество сол ной кислоты, прекраща  на это врем  приливание нитропродукта. По спуске всего нитронродукта даетс  3 час выдержка, затем объем довод т до 650 мл и при 85° добавл ют раствор едкого натра до полного разложени  комплексного соединени , что определ етс  по капле жидкости на фильтровальной бумаге, котора  должна быть бесцветной. Раствор натровой соли фильтруют, щлам промывают гор чей водой, фильтрат и промывные воды смещивают и подкисл ют серной кислотой при 50°, затем охлаждают до 20°, отфильтровывают и промывают 4-аминобензоил-3-амино-5-сульфосалициловой кислотой.50 ml of water, 13 g of cast iron sawdust and hydrochloric acid are charged to the kettle; the mixture is boiled for 15-20 minutes until the acid reaction to the congo disappears. Then for 4 hours, a solution of 4-nitrobepzol-3-amino-5-sulfosalicylic acid heated to 50 ° is poured from a dropping funnel in the amount of 220 g containing 0.1 g mol of the nitro product. As the reaction to the iron ions disappears, the required amount of hydrochloric acid is added, stopping the addition of the nitro product at this time. After the descent of the whole nitrone product, the extract was allowed to stand for 3 hours, then the volume was adjusted to 650 ml and sodium hydroxide solution was added at 85 ° until the complex compound was completely decomposed, which was determined by a drop of liquid on filter paper, which should be colorless. The sodium salt solution is filtered, the gaps are washed with hot water, the filtrate and the wash waters are shifted and acidified with sulfuric acid at 50 °, then cooled to 20 °, filtered and washed with 4-aminobenzoyl-3-amino-5-sulfosalicylic acid.

Выход 90-92% от теории, содержание амина в готовом продукте 98%.Output 90-92% of theory, the amine content in the finished product is 98%.

ПримерExample

Предмет изобретени Subject invention

Способ получени  ароматических аминов, содержащих гидроксильные и карбоксильные группы, восстановлением соответствующих нитросоединений чугунными опилками, отличающийс  тем, что, с целью разложени  образующегос  при восстановлении комплексного соединени  амина с железом, реакционную смесь после восстановлени  обрабатывают избыточным количеством щелочи и продукт реакции выдел ют известными приемами.The method of producing aromatic amines containing hydroxyl and carboxyl groups by reducing the corresponding nitro compounds with cast iron sawdust, characterized in that, in order to decompose the amine-iron complex formed during the reduction, the reaction mixture after reduction is treated with excess alkali and the product is separated by known methods.

SU380993A 1948-06-25 1948-06-25 The method of obtaining aromatic amines containing hydroxyl and carboxyl groups SU75922A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU380993A SU75922A1 (en) 1948-06-25 1948-06-25 The method of obtaining aromatic amines containing hydroxyl and carboxyl groups

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU380993A SU75922A1 (en) 1948-06-25 1948-06-25 The method of obtaining aromatic amines containing hydroxyl and carboxyl groups

Publications (1)

Publication Number Publication Date
SU75922A1 true SU75922A1 (en) 1975-03-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
SU380993A SU75922A1 (en) 1948-06-25 1948-06-25 The method of obtaining aromatic amines containing hydroxyl and carboxyl groups

Country Status (1)

Country Link
SU (1) SU75922A1 (en)

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