SU127656A1 - The method of obtaining diphenic anhydride - Google Patents
The method of obtaining diphenic anhydrideInfo
- Publication number
- SU127656A1 SU127656A1 SU632071A SU632071A SU127656A1 SU 127656 A1 SU127656 A1 SU 127656A1 SU 632071 A SU632071 A SU 632071A SU 632071 A SU632071 A SU 632071A SU 127656 A1 SU127656 A1 SU 127656A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- obtaining
- diphenic anhydride
- anhydride
- diphenic
- chlorine
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Исходную 2-формил-дифенил-2-карбоновую кислоту можно получить с выходом до 85% теоретического путем пропускани озонированного кислорода в раствор фенантрена в смеси метанола с дихлорэтаном (1:1) и последующего разложени образовавщихс пероксидных продуктов 5%-ным раствором едкого натра без выделени их в чистом виде.The starting 2-formyl-diphenyl-2-carboxylic acid can be obtained in a yield of up to 85% of theoretical by passing ozonized oxygen into a solution of phenanthrene in a mixture of methanol and dichloroethane (1: 1) and the subsequent decomposition of the resulting peroxide products with 5% sodium hydroxide solution isolating them in pure form.
Преимуществом предлагаемого способа вл етс доступность исходного продукта, и повышение выхода ангидрида до 75%, в расчете на, фенантрен, против 60% и ниже при получении его из дифеновой кислоты.The advantage of the proposed method is the availability of the starting product, and an increase in the yield of the anhydride to 75%, in terms of phenanthrene, against 60% and lower when it is obtained from diphenic acid.
Пример. 6,75 г 2-формил-дифенил-2-карбоновой кислоты нагревают на сернокислотной бане до 140° и пропускают через расплав ток сухого хлора до начала затвердевани реакционной массы. Затем тем-пе№ 127656Example. 6.75 g of 2-formyl-diphenyl-2-carboxylic acid is heated in a sulfuric acid bath to 140 ° and a stream of dry chlorine is passed through the melt until the reaction mass begins to solidify. Then, the subject number 127656
ратуру бани повышают до 220° и продолжают пропускать хлор до тех пор, пока расплав не начнет вновь кристаллизоватьс . Продолжительность пропускани хлора с начала опыта - около 40 мин. Продукт реакции перекристаллизовывают из дихлорэтана. Выход дифенового ангидрида с т. пл. 216-217°-90% от теоретического (счита на альдегидкислоту ) .The bath room was raised to 220 ° and chlorine continued to pass until the melt began to crystallize again. The duration of the passage of chlorine from the beginning of the experiment is about 40 minutes. The reaction product is recrystallized from dichloroethane. The output of diphenic anhydride with so pl. 216-217 ° -90% of theoretical (counting on aldehyde acid).
Предмет изобретени Subject invention
Способ получени дифенового ангидрида, отличающийс тем, что 2-формил-дифенил-2-карбоновую кислоту подвергают в расплавленном состо нии окислительному хлорированию хлором при 140-220°.A process for the preparation of diphenic anhydride, characterized in that, in a molten state, 2-formyl-diphenyl-2-carboxylic acid is oxidized by chlorine at 140-220 ° C in a molten state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU632071A SU127656A1 (en) | 1959-06-26 | 1959-06-26 | The method of obtaining diphenic anhydride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU632071A SU127656A1 (en) | 1959-06-26 | 1959-06-26 | The method of obtaining diphenic anhydride |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU127656A1 true SU127656A1 (en) | 1959-11-30 |
Family
ID=48398906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU632071A SU127656A1 (en) | 1959-06-26 | 1959-06-26 | The method of obtaining diphenic anhydride |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU127656A1 (en) |
-
1959
- 1959-06-26 SU SU632071A patent/SU127656A1/en active
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