SU62757A1 - A method for extracting pyrethrins from Dalmatian chamomile, etc. of plants - Google Patents
A method for extracting pyrethrins from Dalmatian chamomile, etc. of plantsInfo
- Publication number
- SU62757A1 SU62757A1 SU3239D SU3239D SU62757A1 SU 62757 A1 SU62757 A1 SU 62757A1 SU 3239 D SU3239 D SU 3239D SU 3239 D SU3239 D SU 3239D SU 62757 A1 SU62757 A1 SU 62757A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- dalmatian
- plants
- chamomile
- extracting
- pyrethrins
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Extraction Or Liquid Replacement (AREA)
Description
В известных способах пиретрин, нашедший широкое применение в сельском хоз йстве, извлекают из далматской ромашки летучими растворител ми, а именно: дихлорэтаном, иетролейным эфиром и др. При этом процесс экстракции сопр жен с огнеопасностью в случае применени петролейного эфира, с вредностью дл здоровь рабочих в случае применени дихлорэтана, и значительными потер ми растворителей в процессе экстракции. Кроме того, получаемые при отгонке растворител экстракты содержат сравнительно мало пиретрипа (около 6-8%) и много балластных примесей, вследствие чего обыч1 0 подвергаютс донолните.льной обработке спиртом, что еще более усложн ет производство . Между тем чистота получаемых препаратов все-таки весьма невысока и, если они и пригодны дл опрыскивани растений, то совершепно непригодны дл некоторых ветеринарных и медицинских целей.In the known methods, pyrethrin, which has found widespread use in agriculture, is extracted from Dalmatian chamomile by volatile solvents, namely dichloroethane, ethyl ether, etc. At the same time, the extraction process conjugates flammability in the case of petroleum ether, which is harmful to the health of workers when dichloroethane is used, and significant loss of solvents during the extraction process. In addition, the extracts obtained by the distillation of the solvent contain relatively little pyrethryp (about 6-8%) and a lot of ballast impurities, as a result of which ordinary 0 0 are subjected to complete alcohol treatment, which further complicates production. Meanwhile, the purity of the preparations obtained is still very low and, if they are suitable for spraying plants, they are perfectly unsuitable for some veterinary and medical purposes.
Сог.тасно изобретению, в качестве экстрагирующей жидкости при извлечении пиретрина из далматской ромащки примен етс жидка; угольна кислота. При этом происходит практически полное извлечение пиретринов из далматской ромашки при двухкратном заливе сырь жидкой углекислотой. Получающийс экстракт прозрачен, чист и содержит не менее 40% пиретрина и не имеет отмеченных выше недостатковAccording to the invention, a liquid is used as an extracting liquid when extracting pyrethrin from Dalmatian rummashki; carbonic acid. When this happens, almost complete extraction of pyrethrins from the Dalmatian chamomile occurs when the raw material is twice filled with liquid carbon dioxide. The resulting extract is clear, pure, and contains at least 40% pyrethrin and has no deficiencies noted above.
Дл экстракции пиретрина .может быть использована существующа аппаратура холодильных установок и заводов, вырабатывающих жидкую и твердую углекислоту.For the extraction of pyrethrin, the existing equipment of refrigeration plants and plants producing liquid and solid carbon dioxide can be used.
Предмет изобретени Subject invention
Способ извлечени пиретринов из далматской ромашки и т. п. растений , отличающийс TCJM, что в качестве экстрагеита примен ют жидкую углекислоту.A method for extracting pyrethrins from Dalmatian chamomile and the like of plants, characterized by TCJM, which uses liquid carbon dioxide as the extractite.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU3239D SU62757A1 (en) | 1941-04-18 | 1941-04-18 | A method for extracting pyrethrins from Dalmatian chamomile, etc. of plants |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU3239D SU62757A1 (en) | 1941-04-18 | 1941-04-18 | A method for extracting pyrethrins from Dalmatian chamomile, etc. of plants |
Publications (1)
Publication Number | Publication Date |
---|---|
SU62757A1 true SU62757A1 (en) | 1942-11-30 |
Family
ID=51228539
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU3239D SU62757A1 (en) | 1941-04-18 | 1941-04-18 | A method for extracting pyrethrins from Dalmatian chamomile, etc. of plants |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU62757A1 (en) |
-
1941
- 1941-04-18 SU SU3239D patent/SU62757A1/en active
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