SU72375A1 - The method of purification of 4-sulfoanthranilic acid - Google Patents
The method of purification of 4-sulfoanthranilic acidInfo
- Publication number
- SU72375A1 SU72375A1 SU377799A SU377799A SU72375A1 SU 72375 A1 SU72375 A1 SU 72375A1 SU 377799 A SU377799 A SU 377799A SU 377799 A SU377799 A SU 377799A SU 72375 A1 SU72375 A1 SU 72375A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- acid
- purification
- salt
- sulfoanthranilic
- copper salt
- Prior art date
Links
Description
Получаема различными способами 4-сульфо-2-аминобензойна (4-сульфоантранилова ) кислота содержит значительные количества примесей, преп тствующих ее применению.4-Sulfo-2-aminobenzoic acid (4-sulfo-anthranilic) acid, obtained by various methods, contains significant amounts of impurities that prevent its use.
Описываемым способом 4-сульфоантранилова кислота может быть легко отделена от сопутствующих ей примесей, посредством выделени ее в виде труднорастворимой медной соли, с последующим разложением соли сол ной или серной кислотой.By the method described, 4-sulfo-anthranilic acid can be easily separated from its attendant impurities by isolating it as a sparingly soluble copper salt, followed by decomposition of the salt with hydrochloric or sulfuric acid.
Медную соль получают действием на нейтральную растворимую соль сульфоантраниловой кислоты какой-либо растворимой соли меди. Полученную медную соль отфильтровывают, промывают и разрущают минеральной кислотой, выдел свободную сульфоантраниловую кислоту . Кислые соли сульфоантраниловой кислоты также образуют медную соль, но освобождающа с кислота частично разлагает образовавщуюс медную соль.Copper salt is obtained by acting on the neutral soluble salt of sulfoanthranilic acid of any soluble copper salt. The resulting copper salt is filtered off, washed and destroyed with mineral acid, the selection of free sulfo-anthranilic acid. The acid salts of sulfoantranilic acid also form the copper salt, but the liberating acid partially decomposes the resulting copper salt.
Пример. 0,5 мол растворимой соли 4-сульфоантраниловой кислоты раствор ют в воде, довод т раствор до слабощелочной реакции, слегка подогревают и внос т при размещивании 137 г медного купороса . Смесь охлаждают до 10° и перемешивают до тех пор, пока не прекратитс вы.падение медной соли. Соль отфильтровывают и промывают. Затем медную соль разлагают сол ной или серной кислотой при умеренном нагревании, охлаждают до 10-12° и оставл ют кристаллизоватьс . Выделившуюс сульфоантраниловую кислоту фильтруют, промывают водой до полного удалени меди и сушат.Example. 0.5 mol of the soluble salt of 4-sulfoanthranilic acid is dissolved in water, the solution is brought to a weakly alkaline reaction, slightly warmed, and 137 g of copper sulphate is added when placed. The mixture is cooled to 10 ° and stirred until the precipitation of the copper salt ceases. The salt is filtered and washed. The copper salt is then decomposed with hydrochloric or sulfuric acid with moderate heating, cooled to 10-12 ° and left to crystallize. The separated sulfoantranilic acid is filtered, washed with water until copper is completely removed and dried.
Предмет изобретени Subject invention
Способ очисткИ 4-сульфоантраниловой кислоты, отличающийс тем, что сульфоантраниловую кислоту осаждают из нейтральных растворов в виде труднорастворимой медной соли.A method for the purification of 4-sulfoanthranilic acid, characterized in that sulfoanthranilic acid is precipitated from neutral solutions in the form of a poorly soluble copper salt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU377799A SU72375A1 (en) | 1948-04-19 | 1948-04-19 | The method of purification of 4-sulfoanthranilic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU377799A SU72375A1 (en) | 1948-04-19 | 1948-04-19 | The method of purification of 4-sulfoanthranilic acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU72375A1 true SU72375A1 (en) | 1948-11-30 |
Family
ID=48248899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU377799A SU72375A1 (en) | 1948-04-19 | 1948-04-19 | The method of purification of 4-sulfoanthranilic acid |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU72375A1 (en) |
-
1948
- 1948-04-19 SU SU377799A patent/SU72375A1/en active
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