SU463658A1 - The method of separation of aromatic compounds - Google Patents
The method of separation of aromatic compoundsInfo
- Publication number
- SU463658A1 SU463658A1 SU1727316A SU1727316A SU463658A1 SU 463658 A1 SU463658 A1 SU 463658A1 SU 1727316 A SU1727316 A SU 1727316A SU 1727316 A SU1727316 A SU 1727316A SU 463658 A1 SU463658 A1 SU 463658A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- separation
- aromatic compounds
- isomers
- solvent
- extraction
- Prior art date
Links
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
(54) СПОСОБ РАЗДЕЛЕНИЯ АРОМАТИЧЕСКИХ СОЕДИНЕНИЙ(54) METHOD FOR SEPARATION OF AROMATIC COMPOUNDS
1one
Изобретение относитс к усовершенствованному способу разделени ароматических соединений , в частности к разделению смеси изомеров диаминодифенилметана. The invention relates to an improved method for the separation of aromatic compounds, in particular to the separation of a mixture of diaminodiphenylmethane isomers.
В насто щее врем дл разделени органических соединений П1ироко используют метод экстракции.At present, the method of extraction is used for the separation of organic compounds P1roko.
Экстракци включает следующие основные операции: приведение в контакт исходной смеси веществ и растворител ; механическое разделение образующихс двух фаз; удаление и регенераци растворител из каждой фазы.Extraction includes the following basic operations: bringing the initial mixture of substances and solvent into contact; mechanical separation of the resulting two phases; removal and regeneration of the solvent from each phase.
Однако указанным способом вещества, близкие по своим химическим свойствам, практически не раздел ютс , т. е. значени коэффициентов разделени дл них мало отличаютс от единицы.However, in this way, substances similar in chemical properties are practically not separated, i.e. the values of the separation factors for them differ little from unity.
Согласно изобретению с целью повышени селективности процесса экстрагирование осуществл ют при температуре не выше температуры плавлени растворител . Процесс целесообразно проводить при температуре на 0,1-5°С ниже температуры плавлени твердого растворител .According to the invention, in order to increase the selectivity of the process, the extraction is carried out at a temperature not higher than the melting point of the solvent. The process is expediently carried out at a temperature of 0.1-5 ° C below the melting point of the solid solvent.
Предложенный способ прост в осуществлении , не требует специальной аппаратуры и может быть использован дл выделени необходимого компонента из сложных композиций органических веществ, наход щихс в водных растворах.The proposed method is simple to implement, does not require special equipment, and can be used to isolate the necessary component from complex compositions of organic substances found in aqueous solutions.
Пример. Разделение смеси изомеров диаминодифенилметана .Example. Separation of a mixture of diaminodiphenylmethane isomers.
В термостатированный сосуд помещают водный раствор смеси изомеров диаминодифенилметана - ДДМ (10 мл) общей концентрации 10-3-1Q-4 J-/MJJ и добавл ют навеску дибензила (порошок). Систему перемешивают при 48°С в течение 30-40 мин. После отделени твердой фазы операцию повтор ют.An aqueous solution of a mixture of isomers of diaminodiphenylmethane - DDM (10 ml) with a total concentration of 10-3-1Q-4 J- / MJJ is placed in a thermostated vessel and a portion of dibenzyl (powder) is added. The system is stirred at 48 ° C for 30-40 minutes. After separation of the solid phase, the operation is repeated.
Коэффициент распределени К - - The distribution coefficient K - -
СжSzh
изомера 4,21-ДДМ равен 40, практически весь изомер переходит в твердый растворитель . Остальные изомеры 2,21-ДДМ и 4, остаютс полностью в растворе.isomer 4,21-DDM is equal to 40, almost the entire isomer is converted to solid solvent. The remaining isomers, 2.21-DDM and 4, remain completely in solution.
Аналогично провод т разделение изомеров 4,21-ДДМ и 4,41-ДДМ, использу в качестве твердого растворител дифениламин. Процесс осуществл ют при 50°С. В растворе остаетс Similarly, isomers are separated by 4,21-DDM and 4.41-DDM, using diphenylamine as the solid solvent. The process is carried out at 50 ° C. In the solution remains
изомер 4,, а в твердый растворитель переходит изомер 4,4 -ДДЛ1.isomer 4 ,, and the isomer 4,4 -DD1 is transferred to the solid solvent.
Использу дифениламин при той же температуре , раздел ют изомеры 4, и 2,2 -ДДЛ. Экстрагированием в дибензил 4,21-ДДД11 при 48°С раздел ют смесь изомеров 4, и 2,21-ДДМ.Using diphenylamine at the same temperature, the isomers 4, and 2,2-DDL were separated. Extraction with dibenzyl 4,21-DDD11 at 48 ° C separates the mixture of isomers 4 and 2.21-DDM.
Примен емые дл экстрагировани твердыеUsed for the extraction of solid
растворители не мешают количественному определению изомеров в отдельности; изомерыsolvents do not interfere with the quantitative determination of isomers separately; isomers
определ ют, использу известные реакции на аминогруппу.determined using known reactions to the amino group.
Температура 20С. Temperature 20C.
Из приведенного в таблице видно, что предлагаемый способ позвол ет эффективно раздел ть изомеры ароматических соединений.From the table it can be seen that the proposed method effectively separates the isomers of aromatic compounds.
Предмет изобретени Subject invention
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1727316A SU463658A1 (en) | 1971-12-20 | 1971-12-20 | The method of separation of aromatic compounds |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1727316A SU463658A1 (en) | 1971-12-20 | 1971-12-20 | The method of separation of aromatic compounds |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU463658A1 true SU463658A1 (en) | 1975-03-15 |
Family
ID=20496909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1727316A SU463658A1 (en) | 1971-12-20 | 1971-12-20 | The method of separation of aromatic compounds |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU463658A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7709679B2 (en) | 2006-01-20 | 2010-05-04 | Basf Aktiengesellschaft | Process for simultaneously preparing 4,4′-diphenylmethanediamine and diphenylmethane diisocyanate and polyphenylenepolymethylene polyisocyanates |
| EP3640238A1 (en) | 2018-10-17 | 2020-04-22 | Covestro Deutschland AG | Method for the preparation of di- and polyamines of the diphenyl methane series |
-
1971
- 1971-12-20 SU SU1727316A patent/SU463658A1/en active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7709679B2 (en) | 2006-01-20 | 2010-05-04 | Basf Aktiengesellschaft | Process for simultaneously preparing 4,4′-diphenylmethanediamine and diphenylmethane diisocyanate and polyphenylenepolymethylene polyisocyanates |
| EP3640238A1 (en) | 2018-10-17 | 2020-04-22 | Covestro Deutschland AG | Method for the preparation of di- and polyamines of the diphenyl methane series |
| US10759736B2 (en) | 2018-10-17 | 2020-09-01 | Covestro Deutschland Ag | Process for the preparation of di- and polyamines of the diphenylmethane series |
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